/* ============================================================
   Study Platform — DataCamp-style light theme
   Brand tokens from DataCamp's app: navy text, bright green CTAs,
   teal links, soft gray canvas, white cards.
   ============================================================ */
:root {
  /* tokens measured from the live DataCamp lesson player (CDP computed styles) */
  --dc-navy: #05192d;          /* headings / strong text / active tab bg */
  --dc-navy-2: #12344d;        /* secondary dark */
  --dc-ink: #182635;           /* body text */
  --dc-muted: #5b6b7b;         /* muted text — darkened for WCAG AA on canvas */
  --dc-canvas: #f6f7fb;        /* page background (DataCamp body bg) */
  --dc-card: #ffffff;          /* card background */
  --dc-panel: #efeff5;         /* rounded lesson panel bg */
  --dc-line: rgba(48, 57, 105, .14);   /* soft hairline */
  --dc-line-strong: rgba(48, 57, 105, .6); /* outlined-button border */
  --dc-border: var(--dc-line);
  --dc-green: #03ef62;         /* primary CTA */
  --dc-green-dark: #02c94f;    /* CTA hover */
  --dc-green-soft: #e6fcef;    /* progress fills / success bg */
  --dc-green-ink: #0a6b34;     /* readable green text on light bg */
  --dc-bar-track: #dfe6ee;     /* progress bar track */
  --dc-bar-fill: #00b849;      /* progress fill — deeper green for contrast */
  --dc-active-bg: #d7f3e2;     /* active nav item background */
  --dc-active-ink: #04532a;    /* active nav item text */
  --dc-teal: #097a8d;          /* links */
  --dc-blue: #2d6cdf;          /* focus / selection */
  --dc-gold: #f5c518;          /* XP */
  --dc-gold-ink: #5d4700;      /* readable gold-brown text on light bg */
  --dc-red: #e45858;
  --sb-track: transparent;                   /* scrollbar rail */
  --sb-thumb: rgba(48, 57, 105, .34);        /* scrollbar thumb */
  --sb-thumb-hover: rgba(48, 57, 105, .52);
  --shadow-1: 0 1px 3px rgba(5, 28, 44, .08), 0 1px 2px rgba(5, 28, 44, .06);
  --shadow-2: 0 6px 20px rgba(5, 28, 44, .10);
  --radius: 10px;
  /* gradient tokens — subtle brand-color fades; text contrast on top of every
     gradient stays at or above the flat color it replaces (verified both themes) */
  --grad-green: linear-gradient(135deg, #03ef62 0%, #05c95a 60%, #02b351 100%);
  --grad-green-hover: linear-gradient(135deg, #2df57c 0%, #05d95f 60%, #02c458 100%);
  --grad-navy: linear-gradient(130deg, #05192d 0%, #0a2f52 55%, #0d4a6e 100%);
  --grad-gold: linear-gradient(135deg, #fff3c4 0%, #ffe58a 100%);
  --grad-bar: linear-gradient(90deg, #00b849, #03d95e);
  --grad-bar-dark: linear-gradient(90deg, #02c451, #03ef62);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--dc-canvas);
  color: var(--dc-ink);
  font-size: 15px;
  line-height: 1.55;
}
a { color: var(--dc-teal); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--dc-navy); font-weight: 700; }

/* ---------- scrollbars (Firefox) ---------- */
* { scrollbar-width: thin; scrollbar-color: var(--sb-thumb) var(--sb-track); }

/* ---------- scrollbars (Chromium/WebKit) ---------- */
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--sb-track); }
::-webkit-scrollbar-thumb {
  background: var(--sb-thumb);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: content-box;   /* slim rounded pill with a padded track */
}
::-webkit-scrollbar-thumb:hover { background: var(--sb-thumb-hover); background-clip: content-box; }
::-webkit-scrollbar-corner { background: transparent; }

/* ---------- top bar ---------- */
#topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 50px;                 /* DataCamp header is a slim 50px bar */
  padding: 0 24px;
  background: var(--dc-canvas); /* header shares the page bg — no border */
}
#topbar .logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  font-weight: 800;
  font-size: 17px;
  color: var(--dc-navy);
  letter-spacing: -.2px;
}
#topbar .logo:hover { text-decoration: none; }
#topbar .logo-img {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: block;
  border-radius: 10px;
  background: url('/img/logo-mark.jpg') center / cover no-repeat;
  box-shadow: var(--shadow-1);
  pointer-events: none;
}
#topbar .logo-wordmark { line-height: 1; }
#topbar .spacer { flex: 1; }
#topbar .xp-pill {
  display: flex; align-items: center; gap: 6px;
  background: var(--grad-gold);
  border: 1px solid #f0e0a0;
  color: var(--dc-gold-ink);
  font-weight: 700;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
}
/* ---------- sync-status pill (progress backup indicator) ---------- */
#topbar .sync-pill {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--dc-line);
  color: var(--dc-muted);
  background: var(--dc-card);
  transition: color .25s, border-color .25s, background .25s, opacity .4s;
  white-space: nowrap;
}
#topbar .sync-pill[data-state="hidden"] { opacity: 0; pointer-events: none; }
#topbar .sync-pill[data-state="saving"] { color: var(--dc-teal); border-color: color-mix(in srgb, var(--dc-teal) 45%, transparent); }
#topbar .sync-pill[data-state="saving"] .sync-dot { background: var(--dc-teal); animation: sync-pulse 1s ease-in-out infinite; }
#topbar .sync-pill[data-state="offline"] { color: #b3542e; border-color: color-mix(in srgb, #e08040 55%, transparent); }
#topbar .sync-pill[data-state="offline"] .sync-dot { background: #e08040; }
#topbar .sync-pill[data-state="saved"] .sync-dot { background: var(--dc-teal); }
#topbar .sync-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--dc-muted); flex: 0 0 8px; }
.connection-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 36px;
  padding: 7px 16px;
  background: #fff4df;
  border-bottom: 1px solid #f0d49b;
  color: #704510;
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
}
.connection-banner[hidden] { display: none; }
.connection-retry {
  flex: 0 0 auto;
  border: 1px solid currentColor;
  border-radius: 7px;
  background: transparent;
  color: inherit;
  padding: 4px 10px;
  font: 700 12px inherit;
  cursor: pointer;
}
.connection-retry:hover { background: rgba(112, 69, 16, .09); }
.connection-retry:disabled { opacity: .6; cursor: wait; }
.offline-card {
  max-width: 560px;
  margin: 12vh auto 0;
  padding: 32px 28px;
  text-align: center;
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 16px;
  box-shadow: var(--shadow-2);
}
.offline-card .offline-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 8px;
  border-radius: 50%;
  background: var(--dc-panel);
  color: var(--dc-teal);
}
.offline-card .offline-icon .hi { width: 24px; height: 24px; }
.offline-card h2 { margin: 0 0 8px; }
.offline-card p { margin: 0 auto 20px; max-width: 44ch; color: var(--dc-muted); }
.offline-retry { color: var(--dc-teal); }
[data-theme="dark"] .connection-banner { background: rgba(245, 197, 24, .12); border-color: rgba(245, 197, 24, .3); color: #f7d774; }
[data-theme="dark"] .connection-retry:hover { background: rgba(245, 197, 24, .12); }
@media (max-width: 560px) {
  .connection-banner { align-items: stretch; flex-direction: column; gap: 5px; padding: 8px 14px; }
  .connection-retry { align-self: center; }
}
@keyframes sync-pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .45; transform: scale(.8); } }
@media (prefers-reduced-motion: reduce) {
  #topbar .sync-pill[data-state="saving"] .sync-dot { animation: none; }
}
[data-theme="dark"] #topbar .sync-pill[data-state="offline"] { color: #ffb28a; }
#topbar .overall {
  width: 220px;
}
#topbar .overall .bar {
  height: 8px; border-radius: 999px; background: var(--dc-bar-track); overflow: hidden;
  border: 1px solid var(--dc-line);
}
#topbar .overall .bar > div { height: 100%; background: var(--dc-bar-fill); background-image: var(--grad-bar); border-radius: 999px; transition: width .3s; }
#topbar .overall .label { font-size: 11px; color: var(--dc-muted); margin-top: 2px; text-align: right; }

/* ---------- shell ---------- */
#app { display: flex; min-height: calc(100vh - 50px); }
/* DataCamp lesson player is FULL-WIDTH — no course sidebar on lesson pages */
body.in-lesson #sidebar { display: none; }
body.in-lesson #main { max-width: 1280px; padding: 18px 28px 96px; }

/* ---------- sidebar toggle (single chevron on the seam) ---------- */
.sidebar-toggle {
  --sb-edge: var(--dc-card);
  position: fixed;
  top: 50%;
  left: 264px;                       /* right edge of the open sidebar */
  transform: translate(-50%, -50%);
  z-index: 45;                       /* above content, below topbar (50) */
  width: 26px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--dc-border);
  border-radius: 9px;
  background: var(--dc-card);
  color: var(--dc-navy);
  cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: left .22s ease, background .15s, border-color .15s;
}
.sidebar-toggle svg {
  width: 16px; height: 16px;
  fill: none; stroke: currentColor; stroke-width: 2.4;
  stroke-linecap: round; stroke-linejoin: round;
  transition: transform .22s ease;
}
.sidebar-toggle:hover { background: var(--dc-panel); border-color: var(--dc-teal); }
/* collapsed: tuck the chevron against the left edge and flip it to point right */
body.sidebar-collapsed .sidebar-toggle { left: 16px; }
body.sidebar-collapsed .sidebar-toggle svg { transform: rotate(180deg); }

/* Collapsible sidebar — hidden state removes the 264px rail and centers the content */
body.sidebar-collapsed #sidebar { display: none; }
body.sidebar-collapsed #main {
  max-width: none;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 36px;
  padding-right: 36px;
}
/* the lesson player has no rail, so the chevron toggle has nothing to open */
body.in-lesson .sidebar-toggle { display: none; }

/* ---------- sidebar ---------- */
#sidebar {
  width: 264px;
  min-width: 264px;
  background: var(--dc-card);
  border-right: 1px solid var(--dc-border);
  height: calc(100vh - 56px);
  position: sticky;
  top: 56px;
  display: flex;
  flex-direction: column;
}
#nav { flex: 1; overflow-y: auto; padding: 12px 8px 24px; }
.nav-section {
  padding: 14px 12px 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--dc-muted);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  margin: 2px 0;
  color: var(--dc-navy-2);
  font-size: 13.5px;
  border-radius: 8px;
  line-height: 1.35;
  transition: background .15s, color .15s;
}
/* leading icon accent — muted by default, follows the title colour on state */
.nav-ico {
  display: inline-flex;
  flex-shrink: 0;
  color: var(--dc-muted);
  transition: color .15s;
  margin-top: 1px;
}
.nav-ico .hi { width: 15px; height: 15px; }
.nav-item:hover { background: var(--dc-panel); text-decoration: none; }
.nav-item:hover .nav-ico { color: var(--dc-navy-2); }
.nav-item.active {
  background: var(--dc-active-bg);
  color: var(--dc-active-ink);
  font-weight: 700;
  box-shadow: inset 3px 0 0 var(--dc-bar-fill);
}
.nav-item.active .nav-ico { color: currentColor; }
.nav-item.done { color: var(--dc-green-ink); font-weight: 500; }
.nav-item.done .nav-ico { color: var(--dc-green-dark); }
.nav-item .check {
  margin-left: auto;
  color: var(--dc-green-dark);
  font-weight: 800;
  font-size: 14px;
}
.nav-item .mini-bar {
  flex: 0 0 34px;
  height: 4px;
  background: var(--dc-bar-track);
  border-radius: 999px;
  overflow: hidden;
  margin-left: auto;
  align-self: center;
}
.nav-item .mini-bar > div { height: 100%; background: var(--dc-bar-fill); }

/* ---------- main ---------- */
#main { flex: 1; padding: 28px 36px 64px; max-width: 1180px; }
#main h2 { font-size: 26px; margin: 0 0 6px; letter-spacing: -.3px; }
#main h3 { font-size: 18px; margin: 22px 0 12px; }
#main p { color: var(--dc-ink); }
.muted { color: var(--dc-muted); }

/* breadcrumb */
.crumbs { font-size: 13px; color: var(--dc-muted); margin-bottom: 4px; }
.crumbs a { color: var(--dc-muted); font-weight: 600; }
.crumbs a:hover { color: var(--dc-teal); }

/* ---------- cards ---------- */
.card {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 20px 22px;
  margin-bottom: 16px;
}
.card h3 { margin-top: 0; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.course-card {
  display: flex;
  flex-direction: column;
  transition: box-shadow .15s, transform .15s;
}
.course-card:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }
.course-card h3 { font-size: 16px; margin: 0 0 6px; }
.course-card .meta { font-size: 13px; color: var(--dc-muted); margin: 0 0 10px; }
.bar {
  height: 8px; background: var(--dc-bar-track); border-radius: 999px; overflow: hidden; margin: 8px 0 6px;
}
.bar > div { height: 100%; background: var(--dc-bar-fill); background-image: var(--grad-bar); border-radius: 999px; transition: width .3s; }
.pct-line { font-size: 12px; color: var(--dc-muted); display: flex; justify-content: space-between; }
.pct-line .done-txt { color: var(--dc-green-ink); font-weight: 600; }

/* stats row (dashboard) */
.stat-row { display: flex; gap: 16px; margin: 18px 0 8px; flex-wrap: wrap; }
.stat {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 14px 22px;
  min-width: 120px;
}
.stat .num { font-size: 26px; font-weight: 800; color: var(--dc-navy); }
.stat .label { font-size: 12px; color: var(--dc-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--dc-green);
  background-image: var(--grad-green);
  color: var(--dc-navy);
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s, filter .15s;
}
.btn:hover { background: var(--dc-green-dark); filter: saturate(1.15) brightness(1.04); }
/* AUDIT FIX: in dark theme --dc-navy flips to near-white #e6ebf5, which sat on the
   green gradient at 1.30:1. Buttons always need dark ink on the bright green fill. */
[data-theme="dark"] .btn { color: #04331a; }
.btn.secondary {
  background: var(--dc-card);
  color: var(--dc-navy-2);
  border: 1px solid var(--dc-border);
}
.btn.secondary:hover { background: #eef3f7; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- lesson layout ---------- */
.lesson-head { margin-bottom: 16px; }
.lesson-head h2 { margin-bottom: 2px; }

/* DataCamp layout: transcript panel LEFT, video RIGHT */
.lesson-layout {
  display: grid;
  grid-template-columns: 420px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}
.player-col video {
  width: 100%;
  max-height: 470px;
  background: #000;
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}
.player-col audio { width: 100%; margin-top: 10px; }
.player-col .video-card {
  background: var(--dc-card);
  border-radius: 16px;          /* DataCamp video card: white, r16, 8px pad */
  padding: 8px;
}
@media (max-width: 1100px) {
  .lesson-layout { grid-template-columns: 1fr; }
  .player-col { order: 1; }
  .transcript-panel { order: 2; max-width: none; }
}

/* transcript panel (DataCamp: light gray, numbered segments, blue current) */
.transcript-panel {
  background: var(--dc-panel);  /* DataCamp lesson panel: #EFEFF5, r24 */
  border-radius: 24px;
  padding: 16px 12px;
  max-height: calc(100vh - 220px);
  overflow-y: auto;
}
.transcript-panel .panel-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--dc-navy);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 6px;
  margin: 0 0 12px 4px;
}
.t-seg {
  padding: 12px 12px 12px 16px;
  margin: 0 0 10px;
  border-radius: 4px;
  border-left: 4px solid transparent;
  cursor: pointer;
}
.t-seg:hover { background: #e9e9f0; }
.t-seg.current {
  background: #ffffff;
  border-left-color: var(--dc-blue);
  box-shadow: var(--shadow-1);
}
.t-seg .t-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}
.t-seg .t-title { font-weight: 700; color: var(--dc-navy); font-size: 14px; }
.t-seg .t-time {
  font-size: 11px;
  font-weight: 700;
  color: var(--dc-navy);
  background: #d9e9fb;
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}
.t-seg.current .t-time { background: var(--dc-blue); color: #fff; }
.t-seg .t-text { font-size: 13.5px; color: var(--dc-ink); line-height: 1.55; max-width: 68ch; }

/* right side panel: tabs + transcript (DataCamp-style) */
.side-panel {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  max-height: 520px;
  display: flex;
  flex-direction: column;
  max-width: 340px;
}
.side-panel .tabs {
  display: flex;
  border-bottom: 1px solid var(--dc-border);
}
.side-panel .tab-btn {
  flex: 1;
  padding: 10px 8px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-weight: 700;
  font-size: 13px;
  color: var(--dc-muted);
  cursor: pointer;
  font-family: inherit;
}
.side-panel .tab-btn.active { color: var(--dc-navy); border-bottom-color: var(--dc-green); }
.side-panel .tab-body { overflow-y: auto; padding: 12px 14px 16px; }
.slide-script {
  font-size: 13px;
  color: var(--dc-ink);
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  border-left: 3px solid transparent;
}
.slide-script:hover { background: #f0f4f8; }
.slide-script.current {
  background: #e8f6ee;
  border-left-color: var(--dc-green);
}
.slide-script.current strong { color: var(--dc-green-ink); }
.slide-script strong { display: block; color: var(--dc-navy); margin-bottom: 2px; }
.slide-script .script-text { display: none; }
.slide-script.current .script-text { display: block; }

/* ---------- exercise panel — DataCamp single-column structure ---------- */
.exercise-panel {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 12px;
  box-shadow: var(--shadow-1);
  margin-top: 24px;
  overflow: hidden;
  padding: 28px 32px 0;
}
.exercise-title { font-size: 26px; font-weight: 800; color: var(--dc-navy); margin: 0 0 14px; letter-spacing: -.3px; }
.exercise-q { font-size: 17px; color: var(--dc-ink); margin: 0 0 22px; max-width: 72ch; line-height: 1.6; white-space: pre-wrap; }
/* gray band: 'Answer the question' + XP chip */
.answer-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ececf1;
  margin: 0 -32px;
  padding: 10px 32px;
}
.answer-band .band-label { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--dc-navy); font-size: 15px; }
.answer-band { background: #e9eaf2; }
.answer-band .band-check { color: var(--dc-navy); }
.xp-chip {
  background: var(--dc-gold);
  color: #4d3a00;
  font-weight: 800;
  font-size: 13px;
  padding: 3px 10px;
  border-radius: 4px;
}
/* Possible Answers heading */
.pa-heading { font-size: 22px; font-weight: 800; color: var(--dc-navy); margin: 24px 0 2px; }
.pa-sub { font-size: 14px; color: var(--dc-muted); margin: 0 0 14px; }
/* options */
.quiz-options { list-style: none; padding: 0; margin: 0 0 8px; }
.quiz-options li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  border: 1px solid #e4e4ec;
  border-radius: 10px;
  margin-bottom: 12px;
  cursor: pointer;
  background: #fff;
  font-size: 16px;
  color: var(--dc-navy);
  transition: border-color .12s, box-shadow .12s;
}
.quiz-options li:hover { border-color: #c8c8d4; }
.quiz-options li.selected {
  border-color: #b9d9f5;
  box-shadow: 0 0 0 1px #b9d9f5;
}
.quiz-options li .radio {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid #c9c9d4;
  flex-shrink: 0;
  position: relative;
  transition: border-color .12s;
}
.quiz-options li.selected .radio { border-color: var(--dc-blue); }
.quiz-options li.selected .radio::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--dc-blue);
}
.press-chip {
  margin-left: auto;
  background: #e9eaf2;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--dc-navy-2);
  white-space: nowrap;
}
/* footer: hint left, submit right */
.exercise-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 0 26px;
}
.hint-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid #c8c8d4;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--dc-navy);
  cursor: pointer;
  font-family: inherit;
}
.hint-btn:hover { background: #f4f4f8; }
.btn-submit {
  background: var(--dc-green);
  color: #04331a;               /* deep green-on-green: readable when disabled too */
  border: none;
  border-radius: 4px;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  font-family: inherit;
}
.btn-submit:hover { background: var(--dc-green-dark); }
.btn-submit:disabled { opacity: .5; cursor: not-allowed; }
.xp-badge {
  background: var(--dc-gold);
  color: #5a4400;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .3px;
}
/* starter code / captured text */
.code-editor {
  background: var(--dc-navy);
  border-radius: 8px;
  padding: 16px 18px;
  font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: #d9e6f2;
  white-space: pre-wrap;
  overflow-x: auto;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.05);
  margin-bottom: 22px;
}
.code-editor .code-label { color: #7d97ad; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; display: block; margin-bottom: 8px; }

/* ---------- live Python editor (DataCamp-style: light, syntax-colored) ---------- */
.editor-wrap {
  border: 1px solid #d7dee5;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 16px;
  background: #fff;
}
.editor-chrome {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: #f0f2f5;
  border-bottom: 1px solid var(--dc-border);
  font-size: 12px;
  color: var(--dc-muted);
  font-weight: 600;
}
.editor-chrome .ed-file { color: var(--dc-navy); font-family: "SF Mono", Consolas, monospace; }
.editor-chrome .ed-lang { margin-left: auto; background: #e3e8ee; border-radius: 4px; padding: 2px 8px; font-size: 11px; }
.editor-chrome .ed-btn {
  background: #fff;
  border: 1px solid #d7dee5;
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--dc-navy);
  cursor: pointer;
  font-family: inherit;
}
.editor-chrome .ed-btn:hover { background: #f4f6f8; }
.editor-chrome .ed-btn.run { background: var(--dc-green); border-color: var(--dc-green); color: #04331a; }
.editor-chrome .ed-btn.run:hover { background: var(--dc-green-dark); }
.editor-chrome .ed-btn:disabled { opacity: .5; cursor: wait; }
.editor-area { position: relative; }
.editor-area pre,
.editor-area textarea {
  margin: 0;
  padding: 14px 16px;
  font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.55;
  tab-size: 4;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  overflow: auto;
  border: none;
}
.editor-area pre { min-height: 120px; max-height: 360px; }
.editor-area textarea {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  resize: none;
  outline: none;
  color: transparent;
  caret-color: var(--dc-navy);
  background: transparent;
}
/* syntax colors (light, DataCamp-ish) */
.tok-kw { color: #0033b3; font-weight: 600; }      /* keywords */
.tok-str { color: #067d17; }                        /* strings */
.tok-com { color: #8c8c8c; font-style: italic; }    /* comments */
.tok-num { color: #1750eb; }                        /* numbers */
.tok-fn  { color: #795e26; }                        /* function defs/calls */
.tok-bi  { color: #267f99; }                        /* builtins */
.editor-output {
  border-top: 1px solid var(--dc-border);
  background: #fbfcfe;
  padding: 10px 14px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--dc-navy);
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
  display: none;
}
.editor-output.show { display: block; }
.editor-output .out-label { display: block; font-family: Inter, sans-serif; font-size: 10.5px; font-weight: 800; letter-spacing: 1px; color: var(--dc-muted); margin-bottom: 6px; }
.editor-output .engine-tag { display: inline-block; font-family: Inter, sans-serif; font-size: 10px; font-weight: 700; letter-spacing: 0.5px; color: var(--dc-teal, #0e6b8c); background: #eaf6fb; border: 1px solid #bfe0ee; border-radius: 4px; padding: 2px 6px; margin: 0 0 6px 6px; vertical-align: middle; }
.editor-output.err .engine-tag { color: #a02c24; background: #fdecea; border-color: #f3c1bd; }
.editor-output.err { color: #a02c24; background: #fdf2f2; }
.captured {
  background: #f7f7fb;
  border: 1px solid var(--dc-border);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 13px;
  white-space: pre-wrap;
  color: var(--dc-ink);
  max-height: 420px;
  overflow-y: auto;
  margin-bottom: 8px;
}
.result { margin: 10px 0; padding: 10px 12px; border-radius: 8px; font-size: 13px; }
.result.ok { background: var(--dc-green-soft); color: var(--dc-green-ink); }

/* DataCamp exercise-footer: fixed full-width bottom bar */
.bottom-nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  background: var(--dc-canvas);
  border-top: 1px solid var(--dc-line);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 4px;           /* DataCamp buttons: r4, 800 weight */
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 800;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.pill.primary { background: var(--dc-navy); color: #fff; }
.pill.primary:hover { background: #0a2c47; }
.pill.ghost { background: transparent; color: var(--dc-navy); border: 1px solid var(--dc-line-strong); }
.pill.ghost:hover { background: rgba(48, 57, 105, .08); }
.pill:disabled { opacity: .4; cursor: not-allowed; }

/* MCQ options — DataCamp rows with radio circle */
.quiz-options { list-style: none; padding: 0; margin: 0; }
.quiz-options li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1.5px solid var(--dc-border);
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  background: #fff;
  transition: border-color .12s, background .12s;
  font-size: 14px;
  color: var(--dc-navy-2);
}
.quiz-options li:hover { border-color: var(--dc-teal); }
.quiz-options li.selected { border-color: var(--dc-green-dark); background: #e8f6ee; font-weight: 600; }
.quiz-options li .option-text { color: var(--dc-ink); }
.quiz-options li .radio {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2px solid #b7c4ce;
  flex-shrink: 0;
  position: relative;
}
.quiz-options li.selected .radio { border-color: var(--dc-green-dark); }
.quiz-options li.selected .radio::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--dc-green-dark);
}
.result { margin-top: 10px; padding: 10px 12px; border-radius: 8px; font-size: 13px; }
/* captured body text + starter code */
.captured {
  background: #f0f4f8;
  border: 1px solid var(--dc-border);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 13px;
  white-space: pre-wrap;
  color: var(--dc-ink);
  max-height: 420px;
  overflow-y: auto;
}

/* ---------- course page: DataCamp dark-navy hub with white r4 cards ---------- */
body.in-course #main { max-width: none; padding: 0 0 60px; }
.course-page { background: var(--dc-navy); min-height: calc(100vh - 50px); }
.course-hero {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 16px 26px;
  color: #efeff5;                 /* measured: light text on dark hero */
}
.course-hero h1 {
  color: #efeff5;                 /* measured: #EFEFF5, 28px, 800 */
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 8px;
  letter-spacing: -.3px;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: #03ef62;                 /* DataCamp eyebrow in green */
  margin-bottom: 6px;
}
.hero-meta, .hero-sub { font-size: 14px; color: rgba(239, 239, 245, .72); }
.hero-progress { display: flex; align-items: center; gap: 12px; margin: 14px 0 18px; }
.hero-bar { flex: 1; background: rgba(239, 239, 245, .18); margin: 0; }
.hero-bar > div { background: #03ef62; }
.hero-count { font-size: 12px; font-weight: 700; color: rgba(239, 239, 245, .72); white-space: nowrap; }
.btn-hero {
  display: inline-flex;
  align-items: center;
  background: #03ef62;            /* measured: green bg, navy text, 800, r4 */
  background-image: var(--grad-green);
  color: var(--dc-navy);
  font-size: 14px;
  font-weight: 800;
  border-radius: 4px;
  padding: 10px 18px;
}
.btn-hero:hover { text-decoration: none; background: #02d957; filter: saturate(1.15) brightness(1.04); }
.btn-hero.done { background: transparent; color: #03ef62; border: 1px solid #03ef62; }
.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}
.course-reset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--dc-muted);
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--dc-border);
  border-radius: 4px;
  padding: 8px 14px;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.course-reset:hover { background: var(--dc-panel); color: var(--dc-navy); border-color: var(--dc-line-strong); }
.course-reset.armed {
  background: var(--dc-red);
  color: #fff;
  border-color: var(--dc-red);
  box-shadow: 0 4px 14px rgba(228, 88, 88, .35);
  animation: reset-arm-pulse 1s ease-in-out infinite;
}
@keyframes reset-arm-pulse {
  0%, 100% { box-shadow: 0 4px 14px rgba(228, 88, 88, .35); }
  50% { box-shadow: 0 4px 20px rgba(228, 88, 88, .55); }
}
.course-hero .course-reset.armed { color: #fff; background: var(--dc-red); }
.course-reset:disabled { opacity: .45; cursor: not-allowed; }

.course-body { max-width: 780px; margin: 0 auto; padding: 0 16px 40px; }
.chapter-card {
  background: #fff;               /* measured: white card, r4, 16px pad */
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 16px;
}
.chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: none;
  border: none;
  padding: 4px 0 12px;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
}
.ch-chevron { color: var(--dc-navy); font-size: 14px; transition: transform .15s; }
.chapter-card.collapsed .ch-chevron { transform: rotate(-90deg); }
.ch-texts { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.ch-label { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: var(--dc-muted); }
.ch-sub { font-size: 12px; color: var(--dc-muted); }
.ch-title { font-size: 13.5px; font-weight: 600; color: var(--dc-navy); line-height: 1.3; }
.chapter-card.collapsed .ch-title { color: var(--dc-muted); }
.ch-progress { width: 90px; height: 6px; background: var(--dc-bar-track); border-radius: 999px; overflow: hidden; }
.ch-progress > span { display: block; height: 100%; background: var(--dc-bar-fill); border-radius: 999px; transition: width .3s; }
.chapter-card.collapsed .lesson-rows { display: none; }

.chapter-card .ch-title { display: flex; align-items: baseline; gap: 8px; }
.lesson-rows { list-style: none; margin: 0; padding: 0; }
.lesson-rows li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0;
  border-bottom: 1px solid #eef2f6;
}
.lesson-rows li:last-child { border-bottom: none; }
.lesson-rows li a {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  padding: 10px 16px;
  border-radius: 4px;
  color: var(--dc-navy);
}
.lesson-rows li a:hover { background: var(--dc-panel); text-decoration: none; }
.lesson-rows .icon { width: 22px; text-align: center; flex-shrink: 0; }
.lesson-rows .lr-title { flex: 1; font-size: 14px; font-weight: 500; }
.lesson-rows li.done .lr-title { color: var(--dc-muted); }
.lesson-rows .type-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--dc-muted);
  background: #eef2f6;
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.lesson-rows .check-done { color: var(--dc-green-dark); font-weight: 800; }

/* dashboard "continue learning" — same dark hero language as the course page */
.dc-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  background: var(--dc-navy);
  background-image: var(--grad-navy);
  color: #efeff5;
  border-radius: 4px;
  padding: 22px 24px;
  margin-bottom: 16px;
}
.dc-hero h3 { color: #efeff5; }

/* ---------- guided learning path ---------- */
.path-section { margin: 26px 0 10px; }
.path-intro { color: var(--dc-muted); font-size: 14px; margin: 4px 0 14px; max-width: 72ch; line-height: 1.6; }
/* compact one-line rows for non-current path steps (focus mode) */
.path-mini {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 14px;
  border: 1px solid var(--dc-line);
  border-radius: 8px;
  margin-bottom: 6px;
  text-decoration: none;
  color: var(--dc-ink);
  background: var(--dc-card);
  transition: border-color .15s, background .15s;
}
.path-mini:hover { border-color: var(--dc-teal); background: var(--dc-panel); text-decoration: none; }
.path-mini-num {
  flex: 0 0 22px; height: 22px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--dc-panel); color: var(--dc-muted);
  font-size: 11px; font-weight: 800;
}
.path-mini-title { flex: 1; font-size: 14px; font-weight: 500; min-width: 0; }
.path-mini .cpr-done { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 700; color: var(--dc-green-dark); }
.path-mini .cpr-done .hi { width: 13px; height: 13px; }
.path-mini .cpr-pct { font-size: 12px; font-weight: 700; color: var(--dc-muted); }
.path-mini.is-done { opacity: .72; }
.path-mini.is-done .path-mini-title { text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--dc-muted) 55%, transparent); }
.path-callout {
  background: var(--dc-green-soft);
  color: #0a5c2e;
  border-left: 3px solid var(--dc-green);
  border-radius: 4px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}
.path-list { display: flex; flex-direction: column; }
.path-step { display: flex; gap: 14px; }
.path-rail { display: flex; flex-direction: column; align-items: center; width: 34px; flex: none; }
.path-num {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--dc-card); border: 2px solid var(--dc-line-strong);
  color: var(--dc-muted); font-size: 13px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.path-line { width: 2px; flex: 1; min-height: 14px; background: var(--dc-line-strong); margin: 4px 0; }
.path-step.active .path-num { background: var(--dc-navy); border-color: var(--dc-navy); color: #efeff5; }
.path-step.done .path-num { background: var(--dc-green); border-color: var(--dc-green); color: var(--dc-navy); background-image: var(--grad-green); }
/* AUDIT FIX: same navy-flip trap as .btn — near-white number on green in dark mode */
[data-theme="dark"] .path-step.done .path-num { color: #04331a; }
.path-step.done .path-line { background: var(--dc-green); background-image: var(--grad-bar); }
.path-card {
  flex: 1;
  background: var(--dc-card);
  border: 1px solid var(--dc-line);
  border-radius: 4px;
  box-shadow: var(--shadow-1);
  padding: 16px;
  margin-bottom: 14px;
}
.path-step.active .path-card { border-left: 3px solid var(--dc-navy); }
.path-step.done .path-card { border-left: 3px solid var(--dc-green); opacity: .92; }
.path-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.path-level {
  font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .5px;
  padding: 3px 8px; border-radius: 3px; flex: none;
}
.lv-start   { background: var(--dc-green-soft); color: #0a7a3d; }
.lv-context { background: #e8f1fd; color: #1c5aa8; }
.lv-code    { background: #fdeede; color: #a05a12; }
.lv-adv     { background: var(--dc-panel); color: var(--dc-muted); }
.path-head h3 { margin: 0; font-size: 16px; font-weight: 800; flex: 1; min-width: 200px; }
.path-head h3 a { color: var(--dc-ink); text-decoration: none; }
.path-head h3 a:hover { color: var(--dc-teal); text-decoration: underline; }
.path-progress-mini { font-size: 12px; font-weight: 800; color: var(--dc-muted); }
.path-here {
  font-size: 11px; font-weight: 800; color: #0a7a3d;
  background: var(--dc-green-soft); border-radius: 3px; padding: 3px 8px;
  white-space: nowrap;
}
[data-theme="dark"] .path-here { background: rgba(3, 239, 98, .12); color: #7dffb1; }
.path-why { font-size: 14px; line-height: 1.6; margin: 8px 0 6px; max-width: 72ch; }
.path-prereq {
  font-size: 13px; line-height: 1.55; color: var(--dc-muted);
  background: var(--dc-canvas); border-radius: 4px; padding: 8px 10px; margin: 0 0 10px;
  max-width: 72ch;
}
.path-prereq b { color: var(--dc-ink); }
.path-meta { display: flex; align-items: center; gap: 12px; }
.path-meta .bar { flex: 1; margin: 0; }
.path-meta .pct-line { margin: 0; }
[data-theme="dark"] .path-callout { background: rgba(3, 239, 98, .1); color: #7dffb1; }
[data-theme="dark"] .path-card { background: var(--dc-card); }
[data-theme="dark"] .path-step.active .path-num { background: #efeff5; border-color: #efeff5; color: var(--dc-navy); }
[data-theme="dark"] .lv-start { background: rgba(3, 239, 98, .12); color: #7dffb1; }
[data-theme="dark"] .lv-context { background: rgba(45, 108, 223, .18); color: #9ec1f7; }
[data-theme="dark"] .lv-code { background: rgba(245, 197, 24, .14); color: #ffd966; }
[data-theme="dark"] .lv-adv { background: rgba(239, 239, 245, .08); color: #b8c4d0; }
[data-theme="dark"] .path-prereq { background: rgba(239, 239, 245, .05); }

/* ---------- toast ---------- */
#toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--dc-navy);
  color: #fff;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 600;
  z-index: 1000;
  max-width: 340px;
  display: none;
  box-shadow: var(--shadow-2);
}
#toast.ok { border-left: 4px solid var(--dc-green); }
#toast.err { border-left: 4px solid var(--dc-red); }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  #sidebar { display: none; }
  .sidebar-toggle { display: none; }
  .lesson-layout { grid-template-columns: 1fr; }
  #main { padding: 20px 18px 48px; }
  #topbar .overall { display: none; }
  /* the lesson player's own side padding is too wide for a phone */
  body.in-lesson #main { padding: 14px 16px 96px; }
  /* code snippets must scroll horizontally, never push the page wider —
     an unbreakable `pre` line used to force #main to ~417px min-content */
  .exercise-panel pre, .study-material pre, .inst pre, .lesson-body pre,
  .onboard-card pre {
    max-width: 100%;
    overflow-x: auto;
  }
  /* editor tab strip (file name · language · Run/Reset) can't fit one line */
  .editor-chrome { flex-wrap: wrap; row-gap: 6px; }
  /* exercise footer buttons stack comfortably instead of squeezing */
  .exercise-panel .pill { flex: 1 1 auto; justify-content: center; }
}

/* ---------- drag & drop exercise ---------- */
.dnd-note {
  margin: 4px 0 12px;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--dc-gold-ink);
  background: #fff7dc;
  border: 1px solid #f0e0a0;
  border-radius: 6px;
}
.dnd-items {
  list-style: none;
  margin: 10px 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.dnd-item {
  background: #123049;
  color: #f2f7ff;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: grab;
  user-select: none;
  border: 2px solid transparent;
  box-shadow: var(--shadow-1, 0 1px 3px rgba(0,0,0,.2));
  transition: transform .12s, box-shadow .12s, background .12s;
}
.dnd-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-2, 0 3px 8px rgba(0,0,0,.3)); }
.dnd-item:active { cursor: grabbing; }
.dnd-item.placed { background: var(--dc-green, #16a34a); }
.dnd-buckets {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 12px 0;
}
.dnd-bucket {
  flex: 1 1 200px;
  min-width: 160px;
  background: var(--dc-card, #fff);
  border: 2px solid var(--dc-border, #d5dbe3);
  border-radius: 10px;
  overflow: hidden;
}
.dnd-bucket-title {
  /* pinned dark surface — do NOT use var(--dc-navy) here: it flips to near-white
     in dark mode and leaves bucket labels unreadable */
  background: #123049;
  color: #f2f7ff;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 12px;
  text-align: center;
}
.dnd-dropzone {
  min-height: 70px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: stretch;
  transition: background .15s;
}
.dnd-dropzone.over {
  background: rgba(22, 163, 74, .12);
  border: 2px dashed var(--dc-green, #16a34a);
}
.dnd-empty {
  color: var(--dc-muted, #8a93a3);
  font-size: 12px;
  text-align: center;
  padding: 18px 4px;
  border: 2px dashed var(--dc-border, #d5dbe3);
  border-radius: 8px;
}
.dnd-order {
  margin: 10px 0;
  padding-left: 0;
  list-style: none;
  counter-reset: dndstep;
  min-height: 44px;
}
.dnd-order .dnd-item {
  counter-increment: dndstep;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.dnd-order .dnd-item::before {
  content: counter(dndstep);
  background: var(--dc-green, #16a34a);
  color: #fff;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.dnd-stem {
  background: var(--dc-code-bg, #f4f6f8);
  border: 1px solid var(--dc-border, #d5dbe3);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 12px;
  overflow-x: auto;
  white-space: pre;
}

/* ---------- transcript / slides panel tabs ---------- */
/* DataCamp tab pill: container rgba(48,57,105,.1) r6; active tab navy/white */
.panel-tabs {
  display: inline-flex;
  gap: 2px;
  margin: 0 0 12px 4px;
  background: rgba(48, 57, 105, .1);
  border-radius: 6px;
  padding: 2px;
}
.panel-tab {
  border: none;
  background: transparent;
  color: var(--dc-navy);
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.panel-tab.active {
  background: var(--dc-navy);
  color: #fff;
}
.slide-thumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--dc-border, #d5dbe3);
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  background: var(--dc-card, #fff);
  transition: border-color .15s, transform .12s;
}
.slide-thumb:hover { border-color: var(--dc-green, #16a34a); transform: translateY(-1px); }
.slide-thumb .slide-num {
  background: var(--dc-navy, #1a2b4a);
  color: #fff;
  border-radius: 6px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.slide-thumb .slide-title {
  flex: 1;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg, #1f2937);
}
.slide-thumb .t-time { color: var(--dc-muted, #8a93a3); font-size: 11px; }

/* ---------- two-column exercise: instructions LEFT, editor RIGHT (DataCamp) ---------- */
.exercise-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}
.ex-right .editor-wrap {
  position: sticky;
  top: 66px;                    /* stays visible under the 50px header while scrolling instructions */
}
@media (max-width: 1100px) {
  .exercise-cols { grid-template-columns: 1fr; }
  .ex-right .editor-wrap { position: static; }
}

/* ============================================================
   Dark theme — activated by <html data-theme="dark"> (via the
   topbar toggle). Overrides the brand tokens plus the handful
   of hardcoded light surfaces so the whole app adapts.
   ============================================================ */
[data-theme="dark"] {
  --dc-navy: #e6ebf5;          /* headings / strong text become light */
  --dc-navy-2: #b6c2d4;
  --dc-ink: #d7deea;           /* body text */
  --dc-muted: #93a1b5;
  --dc-canvas: #0f1622;        /* page background */
  --dc-card: #1a2332;          /* card background */
  --dc-panel: #161f2c;         /* rounded lesson panel */
  --dc-line: rgba(255,255,255,.10);
  --dc-line-strong: rgba(255,255,255,.30);
  --dc-border: var(--dc-line);
  --dc-green: #03ef62;
  --dc-green-dark: #05d957;
  --dc-green-soft: rgba(3,239,98,.16);
  --dc-bar-track: #2b3850;     /* progress bar track */
  --dc-bar-fill: #03ef62;      /* bright green pops on the dark track */
  --dc-active-bg: rgba(3, 239, 98, .20);
  --dc-active-ink: #d9ffe9;
  --dc-teal: #4ec3da;          /* links — brighter for dark bg contrast */
  --dc-blue: #4a8cf5;
  --dc-gold: #f5c518;
  --dc-red: #ff7171;
  --sb-track: transparent;
  --sb-thumb: rgba(239, 239, 245, .24);
  --sb-thumb-hover: rgba(239, 239, 245, .40);
  --shadow-1: 0 1px 3px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.35);
  --shadow-2: 0 6px 20px rgba(0,0,0,.55);
  --grad-gold: linear-gradient(135deg, rgba(245,197,24,.20) 0%, rgba(245,197,24,.10) 100%);
  --grad-bar: var(--grad-bar-dark);
}

/* respect reduced-motion users: gradients are static so nothing to disable there,
   but hover filter boosts must not animate */
@media (prefers-reduced-motion: reduce) {
  .btn, .btn-hero { transition: none; }
}

/* ============================================================
   Phone pass (≤480px). The topbar is the layout-viewport driver:
   if its min-content exceeds the device width, the mobile layout
   viewport itself expands and every fixed overlay (onboarding,
   bottom-nav) overflows with it. Keep the topbar compressible.
   ============================================================ */
@media (max-width: 480px) {
  #topbar { padding: 0 14px; gap: 10px; }
  /* the wordmark goes; the logo mark alone still identifies the app */
  #topbar .logo-wordmark { display: none; }
  #topbar .logo-img { width: 34px; height: 34px; flex-basis: 34px; }
  /* sync pill: dot-only on phones (aria-live text still announced;
     the dot colour keeps signalling saving/saved/offline) */
  #topbar .sync-pill { padding: 4px 9px; }
  #topbar #sync-text { display: none; }
  #topbar .xp-pill { padding: 4px 10px; font-size: 12px; }
  #topbar .theme-toggle { width: 30px; }
  /* compact path rows: a touch more breathing room on the sides */
  .path-mini { padding: 8px 11px; gap: 9px; }
  .dc-hero { padding: 16px 16px; gap: 12px; }
  .btn-hero { width: 100%; justify-content: center; }
  /* overlays sized for the phone viewport, not the desktop card */
  .onboard-overlay { padding: 14px; }
  .onboard-card { width: min(430px, calc(100vw - 28px)); padding: 22px 16px 18px; }
  .bottom-nav { gap: 8px; padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px)); }
  .bottom-nav .pill { padding: 9px 14px; font-size: 12.5px; }
  /* Streak pill collapses to "🔥 n"; the full text stays for screen readers
     via the pill's aria-label (kept in sync in app.js). Double-ID selector
     so it beats the desktop default-hide at any source position. */
  #topbar #streak-label { display: none; }
  #topbar #streak-count { display: inline; font-weight: 800; font-size: 13px; }
  #topbar #streak-count:not(:empty)::before { content: '\00a0'; } /* gap after 🔥 */
  /* Account chip: avatar/initial only on phones (menu keeps the full name) */
  #topbar .account-btn .account-name { display: none; }
  #topbar .account-btn { padding: 0 9px; gap: 0; }
}

/* topbar toggle button */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border: 1px solid var(--dc-border);
  border-radius: 8px;
  background: var(--dc-card);
  color: var(--dc-navy);
  font-size: 16px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.theme-toggle:hover { background: var(--dc-panel); }

/* ---------- account button + menu ---------- */
.account-area { position: relative; }
.xp-pill, .streak-pill { cursor: pointer; }
.xp-pill:focus-visible, .streak-pill:focus-visible { outline: 2px solid var(--dc-teal); outline-offset: 2px; }
.account-btn {
  display: inline-flex; align-items: center; gap: 7px;
  height: 34px; padding: 0 12px;
  border: 1px solid var(--dc-border);
  border-radius: 8px;
  background: var(--dc-card);
  color: var(--dc-navy);
  font-weight: 600; font-size: 13px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.account-btn:hover { background: var(--dc-panel); }
/* Compact "🔥 n" streak form: hidden on desktop, shown in the ≤480px tier. */
#topbar .streak-count { display: none; }
/* Long usernames must never push the topbar wider — truncate instead. */
.account-btn .account-name {
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.account-btn .account-avatar {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--dc-teal); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; text-transform: uppercase;
}
.account-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  width: 260px; z-index: 500;
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 12px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, .18);
  padding: 14px;
}
.account-tabs { display: flex; gap: 4px; margin-bottom: 12px; background: var(--dc-panel, var(--dc-canvas)); border-radius: 8px; padding: 3px; }
.account-tab {
  flex: 1; padding: 6px 0; border: 0; border-radius: 6px;
  background: transparent; color: var(--dc-muted);
  font-weight: 600; font-size: 12.5px; cursor: pointer;
}
.account-tab.active { background: var(--dc-card); color: var(--dc-navy); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
[data-theme="dark"] .account-tab.active { background: var(--dc-teal); color: #fff; }
.account-field { display: block; margin-bottom: 10px; }
.account-field span { display: block; font-size: 11.5px; font-weight: 600; color: var(--dc-muted); margin-bottom: 4px; }
.account-field input {
  width: 100%; box-sizing: border-box; padding: 8px 10px;
  border: 1px solid var(--dc-border); border-radius: 8px;
  background: var(--dc-canvas); color: var(--dc-navy);
  font-size: 13.5px;
}
.account-field input:focus { outline: 2px solid var(--dc-teal); outline-offset: 1px; }
.account-hint { font-size: 11.5px; color: var(--dc-teal); margin: 0 0 8px; }
.account-error { font-size: 12px; color: #c0392b; margin: 0 0 8px; font-weight: 600; }
[data-theme="dark"] .account-error { color: #ff9b8a; }
.account-submit {
  width: 100%; padding: 9px 0; border: 0; border-radius: 8px;
  background: var(--dc-teal); background-image: linear-gradient(135deg, #0c7a8d, #097a8d);
  color: #fff;   /* 5.02:1 on the lightest teal stop — WCAG AA (audit finding) */
  font-weight: 700; font-size: 13.5px; cursor: pointer;
}
.account-submit:hover { filter: brightness(1.08); }
.account-submit:disabled { opacity: .6; cursor: wait; }
.account-logout {
  width: 100%; padding: 8px 0; margin-top: 2px;
  border: 1px solid var(--dc-border); border-radius: 8px;
  background: transparent; color: var(--dc-navy);
  font-weight: 600; font-size: 13px; cursor: pointer;
}
.account-logout:hover { background: var(--dc-panel, var(--dc-canvas)); }
.account-danger {
  width: 100%; padding: 8px 0; margin-top: 2px;
  border: 1px solid transparent; border-radius: 8px;
  background: transparent; color: var(--dc-danger, #c0392b);
  font-weight: 600; font-size: 13px; cursor: pointer;
}
.account-danger:hover { background: var(--dc-danger, #c0392b); color: #fff; }
.account-danger[hidden] { display: none; }
.account-delete-confirm { margin-top: 8px; font-size: 12.5px; }
.account-delete-confirm p { margin: 0 0 6px; color: var(--dc-danger, #c0392b); font-weight: 600; }
.account-delete-confirm input {
  width: 100%; padding: 7px 9px; margin-bottom: 6px;
  border: 1px solid var(--dc-border); border-radius: 8px;
  background: var(--dc-panel, var(--dc-canvas)); color: inherit;
  font-size: 13px; box-sizing: border-box;
}
.account-delete-actions { display: flex; gap: 8px; }
.account-delete-actions button {
  flex: 1; padding: 7px 0; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--dc-border); background: transparent; color: inherit;
  font-weight: 600; font-size: 12.5px;
}
.account-delete-actions [data-act="confirm"] {
  border-color: var(--dc-danger, #c0392b);
  background: var(--dc-danger, #c0392b); color: #fff;
}
.account-delete-actions button:disabled { opacity: .6; cursor: wait; }
.account-greeting { font-size: 12.5px; color: var(--dc-muted); margin: 0 0 10px; }
.account-greeting b { color: var(--dc-navy); }

/* —— dark-scoped overrides for hardcoded light surfaces —— */
[data-theme="dark"] .nav-item:hover { background: rgba(255,255,255,.06); }
[data-theme="dark"] .nav-item .nav-ico { color: var(--dc-muted); }
[data-theme="dark"] .nav-item:hover .nav-ico { color: var(--dc-navy-2); }
/* state colour must win over the muted base in dark too */
[data-theme="dark"] .nav-item.active .nav-ico { color: currentColor; }
[data-theme="dark"] .nav-item.done .nav-ico { color: #2fdc82; }
[data-theme="dark"] .nav-item.active { background: var(--dc-active-bg); color: var(--dc-active-ink); }
[data-theme="dark"] .nav-item.done { color: #2fdc82; }
[data-theme="dark"] #nav .check { color: #2fdc82; }

[data-theme="dark"] .bar { background: var(--dc-bar-track); }
[data-theme="dark"] .topbar .overall .bar, [data-theme="dark"] #topbar .overall .bar { background: var(--dc-bar-track); }

[data-theme="dark"] .card { border-color: var(--dc-line); }

[data-theme="dark"] .answer-band { background: #1c2635; }

[data-theme="dark"] .t-seg:hover { background: rgba(255,255,255,.05); }
[data-theme="dark"] .t-seg.current { background: #212c3d; }
[data-theme="dark"] .t-seg .t-time { background: #1e3a5c; }
[data-theme="dark"] .t-seg.current .t-time { background: var(--dc-blue); }
[data-theme="dark"] .slide-thumb { border-color: var(--dc-line); }

[data-theme="dark"] .quiz-options li { background: var(--dc-card); border-color: var(--dc-border); }
[data-theme="dark"] .quiz-options li:hover { border-color: var(--dc-teal); }
[data-theme="dark"] .quiz-options li.selected { border-color: var(--dc-green-dark); background: rgba(3,239,98,.16); }
[data-theme="dark"] .quiz-options li .radio { border-color: #41506a; }
[data-theme="dark"] .press-chip { background: #263248; color: #c3d2e8; }

[data-theme="dark"] .editor-wrap { background: var(--dc-card); border-color: var(--dc-line); }
[data-theme="dark"] .editor-chrome { background: #121a26; }
[data-theme="dark"] .editor-chrome .ed-lang { background: #223047; }
[data-theme="dark"] .editor-chrome .ed-btn { background: #1c2635; border-color: #2a3648; color: var(--dc-navy); }
[data-theme="dark"] .editor-chrome .ed-btn:hover { background: #243142; }
[data-theme="dark"] .editor-chrome .ed-btn.run { background: var(--dc-green); border-color: var(--dc-green); color: #04331a; }
[data-theme="dark"] .btn-submit { background: var(--dc-green); color: #04331a; }
[data-theme="dark"] .editor-chrome .ed-btn.run:hover { background: var(--dc-green-dark); }
[data-theme="dark"] .editor-area textarea,
[data-theme="dark"] .editor-area pre { background: transparent; color: var(--dc-ink); }
[data-theme="dark"] .editor-area textarea::placeholder { color: var(--dc-muted); }
[data-theme="dark"] .editor-output { background: #10192a; color: var(--dc-ink); }
[data-theme="dark"] .editor-output .engine-tag { background: #173049; border-color: #2b4a68; color: #7cc2e8; }
[data-theme="dark"] .editor-output.err { color: #ffb0a8; background: rgba(255,113,113,.14); }
[data-theme="dark"] .editor-output.err .engine-tag { background: rgba(255,113,113,.16); border-color: rgba(255,113,113,.4); color: #ffb0a8; }

[data-theme="dark"] .result.ok { color: #3fe08f; }

/* drag & drop: the light navy bucket headers flip with --dc-navy in dark mode;
   pin them to a real dark surface so bucket names stay readable. */
[data-theme="dark"] .dnd-bucket { background: var(--dc-card); border-color: #31405a; }
[data-theme="dark"] .dnd-bucket-title { background: #223049; color: #eaf1fb; }
[data-theme="dark"] .dnd-item { background: #2b3a55; color: #eaf1fb; }
[data-theme="dark"] .dnd-item.placed { background: var(--dc-green); color: #04331a; }
[data-theme="dark"] .dnd-empty { border-color: #31405a; color: var(--dc-muted); }
[data-theme="dark"] .dnd-dropzone.over { border-color: var(--dc-green); }
[data-theme="dark"] .result.err, [data-theme="dark"] .result.error { color: #ff9a9a; background: rgba(255,113,113,.12); }

/* NOTE: must out-specify the `#topbar .xp-pill` base rule (ID selector), or the
   dark-theme colors silently lose and the pill renders with light-theme ink. */
[data-theme="dark"] #topbar .xp-pill { background: rgba(245,197,24,.12); border-color: rgba(245,197,24,.35); color: #f7d774; }
[data-theme="dark"] .dnd-note { background: rgba(245,197,24,.12); border-color: rgba(245,197,24,.35); color: #f7d774; }

[data-theme="dark"] .pa-sub, [data-theme="dark"] .pct-line, [data-theme="dark"] .crumbs { color: var(--dc-muted); }
[data-theme="dark"] .pct-line .done-txt { color: #2fdc82; }
[data-theme="dark"] .stat .label { color: var(--dc-muted); }
[data-theme="dark"] .course-card { border-color: var(--dc-line); }

/* —— elements that use a DARK navy background + light text stay navy in both themes
   (their var(--dc-navy) flips to light in dark mode, which would go white-on-white) —— */
[data-theme="dark"] .course-page,
[data-theme="dark"] .dc-hero,
[data-theme="dark"] .panel-label,
[data-theme="dark"] .panel-tab.active,
[data-theme="dark"] .pill.primary,
[data-theme="dark"] #toast { background: #05192d; color: #efeff5; }
/* the two hero surfaces keep the navy gradient in dark mode too (it's already dark); the
   small surfaces must stay flat or light text would sit on a too-light gradient end */
[data-theme="dark"] .course-page { background-image: linear-gradient(180deg, #0d2138 0%, #0f1622 340px); }
[data-theme="dark"] .dc-hero { background-image: var(--grad-navy); }
[data-theme="dark"] .course-page h1, [data-theme="dark"] .dc-hero h3 { color: #efeff5; }
[data-theme="dark"] .panel-tabs { background: rgba(255,255,255,.08); }
[data-theme="dark"] .panel-tab.active { color: #fff; }
[data-theme="dark"] .button-outline, [data-theme="dark"] .pill.ghost:hover { background: rgba(255,255,255,.08); }

/* code blocks / captured text stay a dark, readable surface */
[data-theme="dark"] .code-editor { background: #0c1420; color: #e6ebf5; }
[data-theme="dark"] .code-editor code { color: #e6ebf5; }

/* —— course page accordion (white cards in light, dark cards in dark) —— */
[data-theme="dark"] .chapter-card { background: var(--dc-card); }
[data-theme="dark"] .lesson-rows li { border-bottom-color: var(--dc-line); }
[data-theme="dark"] .lesson-rows li a { color: var(--dc-ink); }
[data-theme="dark"] .lesson-rows li.done .lr-title { color: var(--dc-muted); }
[data-theme="dark"] .lesson-rows .type-tag { background: rgba(255,255,255,.08); color: var(--dc-muted); }
[data-theme="dark"] .lesson-rows .check-done { color: #2fdc82; }
[data-theme="dark"] .ch-progress { background: var(--dc-bar-track); }
[data-theme="dark"] .hero-bar { background: rgba(239,239,245,.18); }
[data-theme="dark"] .hero-count, [data-theme="dark"] .hero-meta, [data-theme="dark"] .hero-sub { color: rgba(239,239,245,.72); }
[data-theme="dark"] .hero-eyebrow { color: #03ef62; }
[data-theme="dark"] .btn-hero { background: #03ef62; background-image: var(--grad-green); color: #04331a; }
[data-theme="dark"] .btn-hero:hover { background: #05d957; }

/* —— exercise action buttons in dark —— */
[data-theme="dark"] .hint-btn { background: #1c2635; border-color: #2a3648; color: var(--dc-navy); }
[data-theme="dark"] .hint-btn:hover { background: #243142; }

/* ————— first-run onboarding ————— */
.onboard-overlay {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--dc-navy) 45%, transparent);
  backdrop-filter: blur(3px);
  padding: 20px;
}
/* display:flex above would override the UA's [hidden] { display:none } —
   the overlay stayed painted after "closing" (found via screenshot, not the DOM) */
.onboard-overlay[hidden] { display: none; }
.onboard-card {
  position: relative;
  width: min(430px, 94vw);
  background: var(--dc-card);
  border: 1px solid var(--dc-line);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
  padding: 28px 26px 22px;
  text-align: center;
  animation: onboard-in .28s cubic-bezier(.2, .9, .3, 1.2);
}
@keyframes onboard-in { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }
.onboard-skip {
  position: absolute; top: 14px; right: 14px;
  background: none; border: none; cursor: pointer;
  color: var(--dc-muted); font-size: .85rem; font-weight: 500;
  padding: 4px 8px; border-radius: 8px;
}
.onboard-skip:hover { color: var(--dc-text); background: var(--dc-panel); }
.onboard-steps { display: flex; gap: 7px; justify-content: center; margin-bottom: 14px; }
.onboard-step-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--dc-line); transition: background .2s, transform .2s;
}
.onboard-step-dot.active { background: var(--dc-teal); transform: scale(1.25); }
.onboard-body { min-height: 168px; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.onboard-art {
  width: 72px !important; height: 72px !important;
  margin-bottom: 10px; overflow: visible;
}
.onboard-title { font-size: 1.25rem; font-weight: 700; color: var(--dc-text); margin: 2px 0 10px; }
.onboard-copy { color: var(--dc-muted); font-size: .95rem; line-height: 1.55; max-width: 34ch; margin: 0 auto; }
.onboard-copy b { color: var(--dc-text); }
.onboard-kbd {
  display: inline-block; padding: 1px 7px; border-radius: 6px;
  border: 1px solid var(--dc-line); background: var(--dc-panel);
  color: var(--dc-text); font-size: .85em; font-family: inherit;
}
.onboard-hint { margin-top: 12px; font-size: .85rem; color: var(--dc-teal); font-weight: 600; }
.onboard-hint.hidden { visibility: hidden; }
.onboard-actions { display: flex; gap: 10px; justify-content: center; margin-top: 18px; }
.onboard-btn {
  border-radius: 10px; padding: 9px 26px; font-size: .95rem; font-weight: 600;
  cursor: pointer; border: 1px solid transparent; transition: background .15s, border-color .15s;
}
.onboard-btn.primary { background: var(--dc-teal); color: #fff; }
.onboard-btn.primary:hover { background: color-mix(in srgb, var(--dc-teal) 85%, #000); }
.onboard-btn.secondary { background: none; border-color: var(--dc-line-strong); color: var(--dc-text); }
.onboard-btn.secondary:hover { background: var(--dc-panel); }
.onboard-btn.ghost { background: none; border: none; color: var(--dc-teal); padding: 9px 12px; }
.onboard-btn.ghost:hover { text-decoration: underline; }
/* dark theme adjustments */
[data-theme="dark"] .onboard-card { box-shadow: 0 24px 60px rgba(0, 0, 0, .55); }
[data-theme="dark"] .onboard-btn.primary { background: #05d957; color: var(--dc-navy); }
[data-theme="dark"] .onboard-btn.primary:hover { background: #05b74a; }
[data-theme="dark"] .onboard-btn.secondary { border-color: #2a3648; background: #1c2635; }
[data-theme="dark"] .onboard-btn.secondary:hover { background: #243142; }
[data-theme="dark"] .onboard-btn.ghost { color: #05d957; }
[data-theme="dark"] .onboard-hint { color: #05d957; }
@media (prefers-reduced-motion: reduce) {
  .onboard-card { animation: none; }
  .onboard-step-dot { transition: none; }
}

/* replay-intro link in the account menu */
.account-replay {
  width: 100%; margin-top: 8px;
  background: none; border: none; cursor: pointer;
  color: var(--dc-teal); font-size: .85rem; font-weight: 600;
  padding: 6px; border-radius: 8px; text-align: center;
}
.account-replay:hover { background: var(--dc-panel); }
[data-theme="dark"] .account-replay { color: #05d957; }
[data-theme="dark"] .account-replay:hover { background: #1c2635; }

/* onboarding avatar wrap — keeps Hex from overlapping the copy */
.onboard-art-wrap { height: 84px; display: flex; align-items: center; justify-content: center; margin-bottom: 8px; }
.onboard-art-wrap:empty { display: none; }

/* ============================================================
   Heroicons (24x24 outline) — standardized UI icon set.
   The `.hi` class is emitted by the `icon()` helper in app.js and
   hand-inlined in index.html. Base sizing: 1em so an icon scales
   with its surrounding text; color inherits via currentColor.
   ============================================================ */
.hi {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  flex-shrink: 0;
  pointer-events: none;
}
/* contexts that sized a text glyph with font-size/width now size the svg */
.nav-item .check .hi { width: 14px; height: 14px; }
.lesson-rows .icon .hi { width: 16px; height: 16px; }
.lesson-rows .icon { width: 22px; }
.ch-chevron .hi { width: 14px; height: 14px; }
.lesson-rows .check-done .hi { width: 15px; height: 15px; }
.answer-band .band-check .hi { width: 16px; height: 16px; }
.path-here { display: inline-flex; align-items: center; gap: 5px; }
/* inline links that lead with an icon keep it aligned with the text */
.lesson-rows li a, .card li a { display: flex; align-items: center; gap: 6px; }
.lesson-rows li a .hi, .card li a .hi { width: 15px; height: 15px; color: var(--dc-muted); }
/* pill nav: Previous / Outline / Next */
.pill { display: inline-flex; align-items: center; gap: 6px; }
.pill .hi { width: 15px; height: 15px; }
/* course hero CTA + reset */
.btn-hero { display: inline-flex; align-items: center; gap: 7px; }
.btn-hero .hi { width: 17px; height: 17px; }
.course-reset { display: inline-flex; align-items: center; gap: 6px; }
.course-reset .hi { width: 14px; height: 14px; }
/* code editor Run button */
.ed-btn { display: inline-flex; align-items: center; gap: 5px; }
.ed-btn .hi { width: 13px; height: 13px; }
/* account menu replay */
.account-replay { display: inline-flex; align-items: center; gap: 6px; }
.account-replay .hi { width: 14px; height: 14px; }
/* pet tool icons + send */
.pet-tool .hi { width: 17px; height: 17px; }
.pet-send .hi { width: 17px; height: 17px; }
.pet-chat-icon { width: 22px; height: 22px; }
/* theme toggle */
.theme-toggle .hi { width: 18px; height: 18px; }
/* XP pill star */
#xp-pill .hi { width: 15px; height: 15px; color: var(--dc-gold-ink); }
[data-theme="dark"] #xp-pill .hi { color: #f7d774; }
/* panel tabs / labels (Transcript / Slides) */
.panel-tab, .panel-label { display: inline-flex; align-items: center; gap: 6px; }
.panel-tab .hi, .panel-label .hi { width: 15px; height: 15px; }
/* profile panel rows */
.pp-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.pp-row > span { display: inline-flex; align-items: center; gap: 6px; }
.pp-row .hi { width: 15px; height: 15px; color: var(--dc-muted); }
.pp-close .hi { width: 16px; height: 16px; }
/* drag-and-drop missing note */
.dnd-note { display: flex; align-items: center; gap: 6px; }
.dnd-note .hi { width: 16px; height: 16px; color: var(--dc-red); }
/* onboarding hint check */
.onboard-hint { display: inline-flex; align-items: center; gap: 5px; }
.onboard-hint .hi { width: 13px; height: 13px; }

/* collapsed study-material drawer (beginner-clarity pass): reads as a quiet
   one-line affordance, not a content card */
details.study-material { padding: 0; }
details.study-material summary {
  cursor: pointer; font-weight: 700; font-size: 15px; color: var(--dc-navy);
  padding: 14px 18px; list-style: none; display: flex; align-items: center; gap: 8px;
}
details.study-material summary::-webkit-details-marker { display: none; }
details.study-material summary::before { content: '▸'; font-size: 12px; color: var(--dc-muted); transition: transform .15s; }
details.study-material[open] summary::before { transform: rotate(90deg); }
details.study-material ul { padding: 0 18px 14px !important; }
[data-theme="dark"] details.study-material summary { color: var(--dc-navy); }

/* collapsible long instructions (beginner-clarity pass) */
details.ex-more { margin: -10px 0 18px; }
details.ex-more summary {
  cursor: pointer; font-size: 13px; font-weight: 700; color: var(--dc-teal);
  list-style: none; display: inline-flex; align-items: center; gap: 6px; user-select: none;
}
details.ex-more summary::-webkit-details-marker { display: none; }
details.ex-more summary::before { content: '▸'; font-size: 11px; transition: transform .15s; }
details.ex-more[open] summary::before { transform: rotate(90deg); }
details.ex-more summary:hover { text-decoration: underline; }

/* ============================================================
   Beginner-first study mode
   Reduce competing signals, make the next action obvious, and
   reserve visual weight for the lesson itself.
   ============================================================ */
:root {
  --dc-canvas: #f7f8fc;
  --dc-card: #ffffff;
  --dc-panel: #f0f3f7;
  --dc-ink: #233142;
  --dc-navy: #102a43;
  --dc-navy-2: #3c5064;
  --dc-muted: #647487;
  --dc-line: #dfe6ed;
  --dc-line-strong: #a9b7c5;
  --dc-border: var(--dc-line);
  --dc-teal: #147b88;
  --dc-green: #b9f7d0;
  --dc-green-dark: #13804a;
  --dc-green-soft: #e5f8ec;
  --dc-bar-track: #dbe4ec;
  --dc-bar-fill: #19a866;
  --dc-active-bg: #e7f7ed;
  --dc-active-ink: #12623d;
  --shadow-1: 0 1px 2px rgba(16, 42, 67, .05), 0 4px 14px rgba(16, 42, 67, .05);
  --shadow-2: 0 12px 30px rgba(16, 42, 67, .12);
  --radius: 14px;
}

body {
  background: var(--dc-canvas);
  color: var(--dc-ink);
  font-size: 15px;
  line-height: 1.6;
}

/* Header: one quiet utility row instead of a dashboard of metrics. */
#topbar {
  height: 64px;
  padding: 0 clamp(18px, 4vw, 48px);
  gap: 10px;
  background: color-mix(in srgb, var(--dc-canvas) 94%, transparent);
  border-bottom: 1px solid var(--dc-line);
  backdrop-filter: blur(14px);
}
#topbar .logo { font-size: 16px; color: var(--dc-navy); }
#topbar .logo-img { width: 36px; height: 36px; flex-basis: 36px; border-radius: 11px; }
#topbar .xp-pill {
  background: color-mix(in srgb, var(--dc-gold) 18%, var(--dc-card));
  border-color: color-mix(in srgb, var(--dc-gold) 45%, var(--dc-line));
  padding: 6px 11px;
  font-size: 12px;
}
#topbar .sync-pill[data-state="hidden"],
#topbar .sync-pill[data-state="saved"] { display: none; }
#topbar .overall { width: 132px; }
#topbar .overall .bar { height: 6px; border: 0; background: var(--dc-bar-track); }
#topbar .overall .label { font-size: 10px; margin-top: 3px; }
.theme-toggle,
.account-btn {
  height: 38px;
  border-radius: 10px;
  background: var(--dc-card);
  border-color: var(--dc-line);
}
.account-btn { font-size: 12.5px; }

/* The course list is available on demand; the default shell stays focused. */
#app { min-height: calc(100vh - 64px); }
/*
 * Fluid spacing: paddings scale with the viewport instead of jumping at
 * breakpoints (min 16px on phones, ~40px on desktop, growing slightly on
 * very wide screens). Content columns still cap for readability; see the
 * wide-screen tier below for what expands on big monitors.
 */
#main {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(28px, 4vh, 46px) clamp(16px, 3.2vw, 48px) clamp(72px, 10vh, 110px);
}
body.sidebar-collapsed #main {
  width: 100%;
  max-width: 1100px;
  padding-left: clamp(16px, 3.2vw, 48px);
  padding-right: clamp(16px, 3.2vw, 48px);
}
body.in-dashboard #main { max-width: 1040px; }
body.in-lesson #main { max-width: 1080px; padding: clamp(20px, 3.5vh, 34px) clamp(16px, 3.2vw, 48px) clamp(78px, 11vh, 116px); }
body.in-course #main { max-width: 1140px; padding: clamp(22px, 3.5vh, 34px) clamp(16px, 3.2vw, 44px) clamp(68px, 10vh, 100px); }

/*
 * Wide-screen tier (≥1440px): the fixed 1040–1140px caps left ~half the
 * screen empty on 1920px monitors (measured 435px dead space per side).
 * Let the shell use the room — dashboards/course pages widen, the lesson
 * player grows its media column, while reading columns (.course-body etc.)
 * stay capped so text lines don't become unreadably long.
 */
@media (min-width: 1440px) {
  body.in-dashboard #main { max-width: 1280px; }
  body.in-course #main { max-width: 1360px; }
  body.in-lesson #main { max-width: 1320px; }
  /* Lesson player is a flex column (video + transcript drawer): keep the
     video at a comfortable size instead of stretching to 1300px wide. */
  .lesson-layout .player-col { max-width: 960px; margin: 0 auto; width: 100%; }
}
@media (min-width: 1720px) {
  body.in-dashboard #main { max-width: 1400px; }
  body.in-course #main { max-width: 1480px; }
  body.in-lesson #main { max-width: 1320px; }
}

/* Browse control: self-explanatory when the sidebar is hidden. */
.sidebar-toggle {
  top: auto;
  bottom: 28px;
  left: 264px;
  width: 34px;
  height: 44px;
  transform: translate(-50%, 0);
  border-radius: 12px;
  background: var(--dc-card);
  border-color: var(--dc-line);
  color: var(--dc-navy);
}
.sidebar-toggle-label { display: none; font-size: 12px; font-weight: 800; }
body.sidebar-collapsed .sidebar-toggle {
  left: 18px;
  width: 86px;
  justify-content: center;
  gap: 7px;
  transform: translate(0, 0);
}
body.sidebar-collapsed .sidebar-toggle-label { display: inline; }
body.sidebar-collapsed .sidebar-toggle svg { transform: rotate(180deg); }
#sidebar {
  top: 64px;
  height: calc(100vh - 64px);
  border-right-color: var(--dc-line);
}
#nav { padding: 16px 10px 28px; }
.nav-section { padding: 14px 12px 7px; }
.nav-item { padding: 10px 12px; border-radius: 10px; }
.nav-item.active { box-shadow: inset 3px 0 0 var(--dc-bar-fill); }

/* Dashboard: greeting → next action → optional navigation. */
.dashboard-intro { margin: 0 0 28px; max-width: 650px; }
.dashboard-intro .hero-eyebrow,
.section-kicker,
.lesson-kicker {
  color: var(--dc-teal);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .11em;
  line-height: 1.3;
  text-transform: uppercase;
}
.dashboard-intro h1 {
  margin: 8px 0 8px;
  color: var(--dc-navy);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.045em;
}
.dashboard-intro p { margin: 0; color: var(--dc-muted); font-size: 16px; max-width: 58ch; }
.dc-hero {
  min-height: 174px;
  align-items: center;
  gap: 26px;
  padding: 30px 34px;
  margin-bottom: 42px;
  border-radius: 22px;
  background: linear-gradient(135deg, #102a43 0%, #164c66 100%);
  box-shadow: 0 14px 32px rgba(16, 42, 67, .16);
}
.dc-hero .hero-eyebrow { color: #7bf0ae; }
.dc-hero-copy { flex: 1; min-width: 0; }
.dc-hero h2 {
  margin: 8px 0 5px;
  color: #ffffff;
  font-size: clamp(21px, 3vw, 29px);
  line-height: 1.2;
  letter-spacing: -.025em;
}
.dc-hero .hero-sub { color: rgba(255,255,255,.72); font-size: 13px; }
.btn-hero {
  flex: 0 0 auto;
  gap: 9px;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 12px;
  background: #aef3c8;
  background-image: none;
  color: #103d2a;
  font-size: 13px;
  box-shadow: 0 4px 12px rgba(0,0,0,.12);
}
.btn-hero:hover { background: #c8f9d9; color: #103d2a; filter: none; }

.path-section { margin: 0 0 14px; }
.path-section .section-kicker { margin-bottom: 8px; }
.path-section h2 { margin: 0 0 5px; font-size: 24px; letter-spacing: -.025em; }
.path-intro { margin: 0 0 17px; font-size: 14px; color: var(--dc-muted); }
.focus-path-list { margin: 0; }
.focus-path .path-step { gap: 13px; }
.focus-path .path-rail { width: 38px; }
.focus-path .path-num {
  width: 38px;
  height: 38px;
  border: 0;
  background: var(--dc-green-soft);
  color: var(--dc-green-dark);
  font-size: 12px;
}
.focus-path .path-line { background: var(--dc-line); }
.focus-path .path-card {
  padding: 24px 26px;
  margin-bottom: 0;
  border: 1px solid var(--dc-line);
  border-left: 4px solid var(--dc-green-dark);
  border-radius: 16px;
  box-shadow: var(--shadow-1);
}
.focus-path .path-head { gap: 8px; }
.focus-path .path-level { font-size: 10px; }
.focus-path .path-head .path-progress-mini { margin-left: auto; }
.focus-path .path-card > h3 { margin: 13px 0 5px; font-size: 21px; line-height: 1.25; }
.focus-path .path-card > h3 a { color: var(--dc-navy); }
.focus-path .path-why { margin: 0 0 18px; max-width: 65ch; color: var(--dc-muted); font-size: 14px; }
.focus-path .path-meta { max-width: 690px; }
.focus-path .path-meta .bar { height: 7px; }
.content-drawer {
  margin: 16px 0 0;
  padding: 0;
  background: var(--dc-card);
  border: 1px solid var(--dc-line);
  border-radius: 14px;
  box-shadow: none;
  overflow: hidden;
}
.content-drawer > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 58px;
  padding: 15px 20px;
  cursor: pointer;
  list-style: none;
  color: var(--dc-navy);
  font-size: 14px;
  font-weight: 800;
}
.content-drawer > summary::-webkit-details-marker { display: none; }
.content-drawer > summary::before {
  content: '›';
  order: -1;
  color: var(--dc-muted);
  font-size: 23px;
  line-height: 1;
  transition: transform .15s ease;
}
.content-drawer[open] > summary::before { transform: rotate(90deg); }
.content-drawer > summary:hover { background: var(--dc-panel); }
.drawer-count { color: var(--dc-muted); font-size: 12px; font-weight: 600; }
.path-list-compact { padding: 0 14px 14px; border-top: 1px solid var(--dc-line); }
.path-list-compact .path-mini { margin: 7px 0 0; }
.project-drawer .card-grid { padding: 0 20px 20px; }
.project-drawer .course-card { box-shadow: none; }
.completion-card {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 42px;
  padding: 22px 26px;
  border: 1px solid #bde8ca;
  border-radius: 16px;
  background: var(--dc-green-soft);
  color: var(--dc-green-dark);
}
.completion-card strong { color: var(--dc-navy); }
.completion-card p { margin: 3px 0 0; color: var(--dc-muted); font-size: 13px; }
.completion-icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: #b7efc8; }
.completion-icon .hi { width: 20px; height: 20px; }

/* Course hub: a dark hero, but no dark page-sized canvas. */
.course-page { min-height: auto; background: transparent; }
.course-hero {
  max-width: none;
  margin: 0 0 24px;
  padding: 38px 42px 34px;
  border-radius: 22px;
  background: linear-gradient(135deg, #102a43 0%, #164c66 100%);
  box-shadow: 0 14px 32px rgba(16, 42, 67, .14);
}
.course-hero h1 { margin: 7px 0 8px; font-size: clamp(26px, 4vw, 36px); letter-spacing: -.04em; }
.course-hero-copy { margin: 12px 0 0; max-width: 55ch; color: rgba(255,255,255,.75); font-size: 14px; }
.course-hero .hero-progress { max-width: 700px; margin: 22px 0 18px; }
.course-hero .hero-count { font-size: 11px; }
.course-hero .hero-actions { margin-top: 18px; }
.course-hero .course-reset { border-color: rgba(255,255,255,.24); color: rgba(255,255,255,.76); }
.course-hero .course-reset:hover { background: rgba(255,255,255,.1); color: #fff; }
.course-body { max-width: 880px; padding: 0; }
.chapter-card {
  padding: 12px 16px 14px;
  margin-bottom: 12px;
  border: 1px solid var(--dc-line);
  border-radius: 16px;
  background: var(--dc-card);
  box-shadow: var(--shadow-1);
}
.chapter-head { padding: 8px 4px 11px; }
.ch-label { font-size: 10px; letter-spacing: .1em; color: var(--dc-teal); }
.ch-title { font-size: 15px; }
.ch-sub { font-size: 11px; }
.ch-progress { width: 74px; height: 6px; }
.lesson-rows li { border-bottom-color: var(--dc-line); }
.lesson-rows li a { padding: 11px 9px; border-radius: 10px; }
.lesson-rows .lr-title { font-size: 13.5px; }
.lesson-rows .type-tag { padding: 3px 8px; font-size: 10px; }

/* Lesson: put the player first; transcript and files are expandable. */
.crumbs { margin-bottom: 10px; font-size: 12px; }
.lesson-head { margin-bottom: 22px; }
.lesson-kicker { margin-bottom: 8px; }
.lesson-head h2 { margin: 0; font-size: clamp(27px, 4vw, 38px); line-height: 1.15; letter-spacing: -.04em; }
.lesson-layout { display: flex; flex-direction: column; gap: 16px; }
.lesson-layout .player-col { order: 0; width: 100%; }
.lesson-transcript-drawer { order: 1; width: 100%; border: 1px solid var(--dc-line); border-radius: 16px; background: var(--dc-card); overflow: hidden; }
.lesson-transcript-drawer > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 15px 20px;
  cursor: pointer;
  list-style: none;
  color: var(--dc-navy);
  font-size: 14px;
  font-weight: 800;
}
.lesson-transcript-drawer > summary::-webkit-details-marker { display: none; }
.lesson-transcript-drawer > summary::before { content: '›'; margin-right: 10px; color: var(--dc-muted); font-size: 22px; transition: transform .15s; }
.lesson-transcript-drawer[open] > summary::before { transform: rotate(90deg); }
.lesson-transcript-drawer > summary:hover { background: var(--dc-panel); }
.lesson-transcript-drawer .transcript-panel { border-radius: 0; max-height: 440px; padding: 16px 14px; }
.player-col .video-card { padding: 8px; border-radius: 18px; background: var(--dc-card); box-shadow: var(--shadow-2); }
.player-col video { display: block; width: 100%; max-height: none; aspect-ratio: 16 / 9; object-fit: contain; border-radius: 12px; }

/* Exercises: one calm reading column and one clear working surface. */
.exercise-panel {
  margin-top: 26px;
  padding: 30px 34px 0;
  border-radius: 18px;
  box-shadow: var(--shadow-1);
}
.exercise-q { margin-bottom: 18px; font-size: 18px; line-height: 1.6; }
.answer-band {
  margin: 24px 0 18px;
  padding: 10px 14px;
  border: 1px solid var(--dc-line);
  border-radius: 10px;
  background: var(--dc-panel);
}
.answer-band .band-label { font-size: 12px; color: var(--dc-muted); }
.answer-band .band-check { color: var(--dc-green-dark); }
.xp-chip { padding: 3px 8px; border-radius: 6px; font-size: 11px; }
.choice-hint { margin: 0 0 10px; color: var(--dc-muted); font-size: 13px; }
.quiz-options { margin-bottom: 6px; }
.quiz-options li {
  min-height: 54px;
  padding: 13px 15px;
  margin-bottom: 9px;
  border: 1px solid var(--dc-line);
  border-radius: 12px;
  background: var(--dc-card);
  color: var(--dc-ink);
  font-size: 14px;
}
.quiz-options li:hover { border-color: var(--dc-teal); background: color-mix(in srgb, var(--dc-teal) 3%, var(--dc-card)); }
.quiz-options li.selected { border-color: var(--dc-teal); background: var(--dc-active-bg); box-shadow: 0 0 0 2px color-mix(in srgb, var(--dc-teal) 12%, transparent); }
.quiz-options li .radio { width: 18px; height: 18px; }
.quiz-options li.selected .radio { border-color: var(--dc-teal); }
.quiz-options li.selected .radio::after { background: var(--dc-teal); }
.press-chip { display: none; }
.exercise-foot { padding: 18px 0 26px; justify-content: flex-end; }
.btn-submit { min-height: 44px; padding: 11px 20px; border-radius: 10px; background: #aef3c8; color: #103d2a; }
.btn-submit:hover { background: #c8f9d9; }
.exercise-cols { gap: 32px; grid-template-columns: minmax(280px, .85fr) minmax(0, 1.15fr); }
.ex-right .editor-wrap { top: 82px; border-radius: 14px; box-shadow: var(--shadow-1); }
.editor-chrome { min-height: 46px; padding: 9px 12px; }
.editor-area pre, .editor-area textarea { font-size: 12.5px; line-height: 1.6; }

/* Optional materials sit below the learning action. */
details.study-material { margin: 16px 0 0; border-radius: 14px; box-shadow: none; }
details.study-material summary { min-height: 54px; padding: 14px 18px; font-size: 13px; }

/* Project page: keep the brief central and supporting files quiet. */
.project-page { max-width: 880px; margin: 0 auto; }
.project-hero {
  margin-bottom: 24px;
  padding: 34px 38px;
  border-radius: 22px;
  background: linear-gradient(135deg, #102a43 0%, #164c66 100%);
  color: #fff;
  box-shadow: 0 14px 32px rgba(16, 42, 67, .14);
}
.project-hero h1 { margin: 8px 0 12px; color: #fff; font-size: clamp(26px, 4vw, 36px); line-height: 1.15; letter-spacing: -.04em; }
.project-hero .hero-eyebrow { color: #7bf0ae; }
.project-meta { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,.75); font-size: 13px; }
.project-instructions { padding: 30px 34px; border-radius: 18px; }
.project-instructions h2 { margin: 8px 0 18px; font-size: 25px; }
.project-download { display: inline-flex; align-items: center; gap: 7px; margin-bottom: 16px; font-size: 13px; font-weight: 700; }
.project-task { padding-top: 20px; margin-top: 20px; border-top: 1px solid var(--dc-line); }
.project-task h3 { margin: 0 0 8px; font-size: 17px; }
.project-task p { color: var(--dc-muted); }
.project-drawer .resource-type { margin-left: auto; color: var(--dc-muted); font-size: 11px; }
.workspace-note { margin: 0; padding: 0 20px 20px; color: var(--dc-muted); font-size: 13px; }

/* Make the fixed lesson navigation an unobtrusive finish line. */
.bottom-nav {
  justify-content: center;
  gap: 8px;
  padding: 9px 16px calc(9px + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--dc-canvas) 92%, transparent);
  backdrop-filter: blur(14px);
  border-top-color: var(--dc-line);
}
.bottom-nav .pill { min-height: 40px; border-radius: 10px; padding: 9px 15px; font-size: 12px; }
.bottom-nav .pill.primary { background: var(--dc-navy); color: #fff; }

@media (max-width: 900px) {
  #main, body.sidebar-collapsed #main { padding-left: 24px; padding-right: 24px; }
  body.in-lesson #main { padding-left: 24px; padding-right: 24px; }
  body.in-course #main { padding-left: 20px; padding-right: 20px; }
  .exercise-cols { grid-template-columns: 1fr; }
  .ex-right .editor-wrap { position: static; }
}

@media (max-width: 720px) {
  #topbar { height: 58px; padding: 0 14px; }
  #app { min-height: calc(100vh - 58px); }
  #topbar .overall { display: none; }
  #topbar .xp-pill { margin-left: auto; }
  #main, body.sidebar-collapsed #main, body.in-lesson #main, body.in-course #main { padding: 28px 16px 92px; }
  .dashboard-intro { margin-bottom: 24px; }
  .dashboard-intro h1 { font-size: 32px; }
  .dc-hero { align-items: stretch; min-height: 0; padding: 24px; margin-bottom: 34px; border-radius: 18px; }
  .dc-hero .btn-hero { width: 100%; justify-content: center; }
  .focus-path .path-card { padding: 20px 18px; }
  .focus-path .path-rail { width: 31px; }
  .focus-path .path-num { width: 31px; height: 31px; }
  .focus-path .path-head .path-progress-mini { width: 100%; margin-left: 0; }
  .course-hero, .project-hero { padding: 28px 22px; border-radius: 18px; }
  .course-hero h1, .project-hero h1 { font-size: 27px; }
  .course-hero .hero-actions { align-items: stretch; flex-direction: column; }
  .course-hero .btn-hero { justify-content: center; }
  .lesson-head h2 { font-size: 29px; }
  .exercise-panel { padding: 24px 18px 0; border-radius: 16px; }
  .exercise-q { font-size: 16px; }
  .exercise-cols { gap: 18px; }
  .bottom-nav { justify-content: stretch; }
  .bottom-nav .pill { flex: 1 1 0; justify-content: center; padding-left: 8px; padding-right: 8px; }
  .bottom-nav .pill .hi { display: none; }
}

/* Dark study mode keeps the same hierarchy without the old high-contrast wall. */
[data-theme="dark"] {
  /* A deeper ocean base gives the cards room to breathe instead of making
     every surface look like the same blue-gray. */
  --dc-canvas: #0d1722;
  --dc-card: #152636;
  --dc-panel: #1e3344;
  --dc-ink: #e4edf4;
  --dc-navy: #f4f8fb;
  --dc-navy-2: #bfd0db;
  --dc-muted: #9ab0bf;
  --dc-line: rgba(180, 213, 230, .18);
  --dc-line-strong: rgba(180, 213, 230, .40);
  --dc-border: var(--dc-line);
  --dc-teal: #6fe1df;
  --dc-green: #8cebb1;
  --dc-green-dark: #63d89b;
  --dc-green-soft: rgba(99, 216, 155, .14);
  --dc-active-bg: rgba(99, 216, 155, .16);
  --dc-active-ink: #b8f5cf;
  --dc-bar-track: #2d465a;
  --dc-bar-fill: #70dba0;
  --dc-gold-ink: #f8d675;
  --dc-red: #ff8585;
  --dc-blue: #81aaff;
  --shadow-1: 0 1px 2px rgba(0,0,0,.30), 0 5px 16px rgba(0,0,0,.20);
  --shadow-2: 0 14px 34px rgba(0,0,0,.38);
}
[data-theme="dark"] #topbar { background: color-mix(in srgb, var(--dc-canvas) 92%, transparent); }
[data-theme="dark"] #topbar .xp-pill { background: rgba(245,197,24,.12); border-color: rgba(245,197,24,.35); }
[data-theme="dark"] .dashboard-intro .hero-eyebrow,
[data-theme="dark"] .section-kicker,
[data-theme="dark"] .lesson-kicker { color: #77e5e5; }
[data-theme="dark"] .dc-hero,
[data-theme="dark"] .course-hero,
[data-theme="dark"] .project-hero { background: linear-gradient(135deg, #172d43 0%, #164e62 100%); }
[data-theme="dark"] .dc-hero .hero-eyebrow,
[data-theme="dark"] .project-hero .hero-eyebrow { color: #9af5bd; }
[data-theme="dark"] .btn-hero,
[data-theme="dark"] .btn-submit { background: #8cf0b0; color: #092c1b; }
[data-theme="dark"] .btn-hero:hover,
[data-theme="dark"] .btn-submit:hover { background: #b0f7c8; color: #092c1b; }
[data-theme="dark"] .focus-path .path-num { background: rgba(89, 222, 139, .18); color: #9af5bd; }
[data-theme="dark"] .focus-path .path-card { border-left-color: #63e39a; }
[data-theme="dark"] .focus-path .path-card > h3 a,
[data-theme="dark"] .content-drawer > summary,
[data-theme="dark"] .lesson-transcript-drawer > summary { color: var(--dc-navy); }
[data-theme="dark"] .completion-card { border-color: rgba(89,222,139,.35); }
[data-theme="dark"] .completion-icon { background: rgba(89,222,139,.25); }
[data-theme="dark"] .chapter-card,
[data-theme="dark"] .content-drawer,
[data-theme="dark"] .lesson-transcript-drawer { background: var(--dc-card); }
[data-theme="dark"] .content-drawer > summary:hover,
[data-theme="dark"] .lesson-transcript-drawer > summary:hover { background: rgba(255,255,255,.05); }
[data-theme="dark"] .player-col .video-card { background: #0d151e; }
[data-theme="dark"] .exercise-panel { background: var(--dc-card); }
[data-theme="dark"] .answer-band { background: var(--dc-panel); }
[data-theme="dark"] .quiz-options li { background: var(--dc-card); color: var(--dc-ink); }
[data-theme="dark"] .quiz-options li.selected { background: rgba(89,222,139,.15); }
[data-theme="dark"] .editor-wrap { background: var(--dc-card); }
[data-theme="dark"] .project-instructions { background: var(--dc-card); }
[data-theme="dark"] .bottom-nav { background: color-mix(in srgb, var(--dc-canvas) 90%, transparent); }
[data-theme="dark"] .bottom-nav .pill.primary { background: #e7f1f9; color: #102a43; }

@media (prefers-reduced-motion: reduce) {
  .content-drawer > summary::before,
  .lesson-transcript-drawer > summary::before { transition: none; }
}

/* ---------- daily learning loop ---------- */
.streak-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 5px 11px;
  border: 1px solid color-mix(in srgb, #e08a36 42%, var(--dc-line));
  border-radius: 999px;
  background: color-mix(in srgb, #f4a340 13%, var(--dc-card));
  color: #8a4d00;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  transition: background .2s, border-color .2s, color .2s, transform .2s;
}
.streak-pill .streak-fire { font-size: 15px; line-height: 1; }
.streak-pill[data-state="active"] {
  border-color: color-mix(in srgb, #e08a36 62%, var(--dc-line));
  background: color-mix(in srgb, #f4a340 21%, var(--dc-card));
  color: #7a3f00;
}
.streak-pill[data-state="active"] .streak-fire { filter: saturate(1.15); }

.daily-goal-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px 16px;
  margin: 0 0 24px;
  padding: 19px 22px;
  border-color: color-mix(in srgb, var(--dc-teal) 22%, var(--dc-line));
  background: linear-gradient(135deg, color-mix(in srgb, var(--dc-teal) 7%, var(--dc-card)), var(--dc-card));
}
.daily-goal-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 15px;
  background: color-mix(in srgb, #f4a340 18%, var(--dc-card));
  border: 1px solid color-mix(in srgb, #e08a36 35%, var(--dc-line));
  font-size: 25px;
}
.daily-goal-copy-wrap { min-width: 0; }
.daily-goal-copy-wrap .section-kicker { margin-bottom: 3px; }
.daily-goal-copy-wrap h2 {
  margin: 0 0 3px;
  color: var(--dc-navy);
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.25;
  letter-spacing: -.02em;
}
.daily-goal-copy-wrap p { margin: 0; color: var(--dc-muted); font-size: 13px; line-height: 1.45; }
.daily-goal-copy-wrap .daily-goal-next { margin-top: 5px; color: var(--dc-teal); font-size: 11px; font-weight: 800; }
.daily-goal-score { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; min-width: 58px; }
.daily-goal-score strong { color: var(--dc-navy); font-size: 22px; line-height: 1; }
.daily-goal-score span { color: var(--dc-muted); font-size: 11px; font-weight: 700; white-space: nowrap; }
.daily-goal-bar {
  grid-column: 2 / -1;
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--dc-bar-track);
}
.daily-goal-bar span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #e08a36, #f4c04e);
  transition: width .35s ease;
}
.daily-goal-badges {
  display: flex;
  flex-wrap: wrap;
  grid-column: 2 / -1;
  gap: 6px;
  margin: -4px 0 0;
  padding: 0;
  list-style: none;
}
.daily-goal-badges li {
  padding: 3px 8px;
  border: 1px solid color-mix(in srgb, #e08a36 35%, var(--dc-line));
  border-radius: 999px;
  background: color-mix(in srgb, #f4a340 12%, var(--dc-card));
  color: #8a4d00;
  font-size: 11px;
  font-weight: 800;
}
.daily-goal-badges[hidden] { display: none; }

[data-theme="dark"] .streak-pill {
  border-color: rgba(244, 192, 78, .38);
  background: rgba(244, 192, 78, .12);
  color: #ffd978;
}
[data-theme="dark"] .streak-pill[data-state="active"] { background: rgba(244, 192, 78, .19); color: #ffe6a0; }
[data-theme="dark"] .daily-goal-card {
  border-color: rgba(111, 225, 223, .25);
  background: linear-gradient(135deg, rgba(111, 225, 223, .09), var(--dc-card));
}
[data-theme="dark"] .daily-goal-icon { background: rgba(244, 192, 78, .14); border-color: rgba(244, 192, 78, .35); }
[data-theme="dark"] .daily-goal-bar { background: var(--dc-bar-track); }
[data-theme="dark"] .daily-goal-badges li { background: rgba(244, 192, 78, .12); border-color: rgba(244, 192, 78, .35); color: #ffe09a; }

@media (max-width: 600px) {
  .daily-goal-card { grid-template-columns: auto minmax(0, 1fr); padding: 17px; }
  .daily-goal-score { grid-column: 2; grid-row: 1; justify-self: end; }
  .daily-goal-copy-wrap { grid-column: 1 / -1; grid-row: 2; }
  .daily-goal-bar, .daily-goal-badges { grid-column: 1 / -1; }
  .daily-goal-copy-wrap h2 { font-size: 18px; }
}
@media (max-width: 480px) {
  .streak-pill { min-height: 30px; padding: 5px 8px; gap: 4px; font-size: 11px; }
  .streak-pill .streak-fire { font-size: 14px; }
}

/* ---------- review workspace (Phase 8) ---------- */
.review-page {
  width: min(100%, 940px);
  margin: 0 auto;
}
.review-intro {
  max-width: 720px;
  margin: 8px 0 24px;
}
.review-intro h1 {
  margin: 5px 0 10px;
  color: var(--dc-navy);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.045em;
}
.review-intro p {
  max-width: 62ch;
  margin: 0;
  color: var(--dc-muted);
  font-size: 16px;
  line-height: 1.65;
}
.review-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 18px;
}
.review-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
  padding: 15px 17px;
  background: var(--dc-card);
  border: 1px solid var(--dc-line);
  border-radius: 14px;
  box-shadow: var(--shadow-1);
}
.review-stat strong {
  color: var(--dc-navy);
  font-size: 24px;
  line-height: 1;
}
.review-stat span {
  color: var(--dc-muted);
  font-size: 12px;
  font-weight: 700;
}
.review-focus {
  padding: 24px;
  margin-bottom: 16px;
  border-radius: 18px;
}
.review-focus-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.review-focus-head h2 {
  margin: 4px 0 0;
  font-size: clamp(21px, 3vw, 28px);
  letter-spacing: -.03em;
}
.review-session-count {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--dc-green-soft);
  color: var(--dc-green-ink);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}
.review-card {
  padding: 22px;
  border: 1px solid var(--dc-line);
  border-radius: 15px;
  background: var(--dc-panel);
}
.review-card-meta,
.review-card-source,
.journal-entry-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.review-card-meta {
  justify-content: space-between;
  color: var(--dc-muted);
  font-size: 12px;
  font-weight: 700;
}
.review-kind {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--dc-teal) 12%, transparent);
  color: var(--dc-teal);
  font-size: 11px;
  font-weight: 800;
}
.review-card h3 {
  margin: 18px 0 4px;
  color: var(--dc-navy);
  font-size: 22px;
  line-height: 1.25;
}
.review-card-source {
  margin: 0;
  color: var(--dc-muted);
  font-size: 12px;
}
.review-card-source a { font-weight: 700; }
.review-prompt {
  margin: 20px 0;
  padding: 18px 19px;
  border-left: 4px solid var(--dc-teal);
  border-radius: 10px;
  background: var(--dc-card);
}
.review-prompt > span {
  display: block;
  margin-bottom: 6px;
  color: var(--dc-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.review-prompt p {
  margin: 0;
  color: var(--dc-ink);
  font-size: 16px;
  line-height: 1.6;
}
.review-question {
  margin: 0 0 9px;
  color: var(--dc-navy) !important;
  font-size: 13px;
  font-weight: 800;
}
.review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.review-action {
  min-width: 92px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--dc-line-strong);
  border-radius: 10px;
  background: var(--dc-card);
  color: var(--dc-navy);
  font: 800 13px inherit;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .15s;
}
.review-action:hover,
.review-action:focus-visible { transform: translateY(-1px); border-color: var(--dc-teal); }
.review-action.again:hover,
.review-action.again:focus-visible { background: #fff1e8; border-color: #d88958; color: #8a4d00; }
.review-action.hard:hover,
.review-action.hard:focus-visible { background: #fff8dc; border-color: #d8b534; color: #745800; }
.review-action.gotit {
  border-color: var(--dc-green-dark);
  background: var(--dc-green);
  color: #04331a;
}
.review-action.gotit:hover,
.review-action.gotit:focus-visible { background: var(--dc-green-dark); }
.review-help {
  margin: 11px 0 0;
  color: var(--dc-muted) !important;
  font-size: 12px;
}
.review-empty {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-radius: 18px;
}
.review-empty h1,
.review-empty h2 { margin: 3px 0 6px; }
.review-empty p { margin: 0 0 16px; color: var(--dc-muted); }
.review-empty-icon {
  display: grid;
  place-items: center;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--dc-green-soft);
  color: var(--dc-green-dark);
}
.review-empty-icon .hi { width: 22px; height: 22px; }
.review-complete {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 8px 0;
}
.review-complete h3 { margin: 0; }
.review-complete p { flex: 1 1 100%; margin: 0; color: var(--dc-muted); }
.review-complete .btn { margin-top: 2px; }
.review-drawer { margin-top: 12px; }
.review-journal,
.review-recaps { padding: 0 20px 20px; }
.journal-entry,
.recap-entry {
  padding: 16px 0;
  border-top: 1px solid var(--dc-line);
}
.journal-entry:first-child,
.recap-entry:first-child { border-top: 0; }
.journal-entry h3,
.recap-entry h3 {
  margin: 9px 0 4px;
  color: var(--dc-navy);
  font-size: 16px;
}
.journal-entry p,
.recap-entry p {
  margin: 0 0 8px;
  color: var(--dc-muted);
  font-size: 13px;
  line-height: 1.55;
}
.journal-entry a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 800;
}
.journal-entry a .hi { width: 14px; height: 14px; }
.review-due {
  color: var(--dc-muted);
  font-size: 11px;
  font-weight: 700;
}
.review-muted { margin: 0; color: var(--dc-muted); font-size: 13px; }
[data-theme="dark"] .review-action.again:hover,
[data-theme="dark"] .review-action.again:focus-visible { background: rgba(216,137,88,.16); color: #ffc09a; }
[data-theme="dark"] .review-action.hard:hover,
[data-theme="dark"] .review-action.hard:focus-visible { background: rgba(216,181,52,.16); color: #ffe28b; }
[data-theme="dark"] .review-action.gotit { color: #092c1b; }

@media (max-width: 720px) {
  .review-intro { margin-top: 0; }
  .review-intro h1 { font-size: 31px; }
  .review-intro p { font-size: 14px; }
  .review-stats { gap: 8px; }
  .review-stat { display: block; padding: 13px 12px; }
  .review-stat strong,
  .review-stat span { display: block; }
  .review-stat span { margin-top: 5px; }
  .review-focus { padding: 17px; border-radius: 16px; }
  .review-focus-head { display: block; }
  .review-session-count { display: inline-flex; margin-top: 9px; }
  .review-card { padding: 17px; }
  .review-card h3 { font-size: 19px; }
  .review-prompt { padding: 15px; }
  .review-action { flex: 1 1 0; min-width: 0; }
  .review-empty { align-items: flex-start; padding: 19px; }
}

@media (prefers-reduced-motion: reduce) {
  .review-action { transition: none; }
}

/* ============================================================
   Full-page auth experience
   A quiet, premium study moment for sign-in, account creation,
   and local recovery-code password reset.
   ============================================================ */
body.auth-route {
  overflow: hidden;
  background: #07111f;
}
body.auth-route #topbar,
body.auth-route #connection-banner,
body.auth-route #sidebar,
body.auth-route #app,
body.auth-route .sidebar-toggle,
body.auth-route #toast,
body.auth-route .pet-dock,
body.auth-route .pet-panel,
body.auth-route .pet-profile,
body.auth-route #avatar-diagnostics,
body.auth-route #onboard-overlay {
  display: none !important;
}
.auth-gate [hidden] { display: none !important; }
.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: block;
  overflow: auto;
  background: #07111f;
  color: #eef5ff;
}
.auth-shell {
  display: grid;
  grid-template-columns: minmax(380px, .94fr) minmax(450px, 1.06fr);
  width: min(1440px, 100%);
  min-height: 100dvh;
  margin: 0 auto;
}
.auth-visual {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  overflow: hidden;
  padding: clamp(28px, 5vw, 68px);
  background:
    radial-gradient(circle at 76% 15%, rgba(77, 223, 214, .20), transparent 26%),
    radial-gradient(circle at 16% 86%, rgba(116, 89, 255, .24), transparent 34%),
    linear-gradient(145deg, #0a1930 0%, #0b1b32 46%, #10133a 100%);
}
.auth-visual::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(157, 205, 255, .055) 1px, transparent 1px), linear-gradient(90deg, rgba(157, 205, 255, .055) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, black 15%, black 75%, transparent);
  content: '';
  opacity: .6;
}
.auth-visual::after {
  position: absolute;
  right: -18%;
  bottom: -18%;
  z-index: -1;
  width: 70%;
  aspect-ratio: 1;
  border: 1px solid rgba(125, 243, 219, .13);
  border-radius: 50%;
  box-shadow: 0 0 0 46px rgba(125, 243, 219, .035), 0 0 0 92px rgba(125, 243, 219, .025);
  content: '';
}
.auth-brand,
.auth-mobile-mark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
  color: #f5f8ff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.02em;
}
.auth-brand:hover { color: #fff; text-decoration: none; }
.auth-brand-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  overflow: hidden;
  border: 1px solid rgba(188, 255, 233, .38);
  border-radius: 12px 12px 12px 4px;
  background: linear-gradient(135deg, #78f5cb, #56b7ff 58%, #7568ff);
  box-shadow: 0 9px 24px rgba(44, 210, 204, .23);
  transform: rotate(-8deg);
}
.auth-brand-mark::before,
.auth-brand-mark::after {
  position: absolute;
  width: 17px;
  height: 4px;
  border-radius: 99px;
  background: #071b31;
  content: '';
  opacity: .82;
  transform: rotate(8deg);
}
.auth-brand-mark::before { top: 10px; left: 8px; }
.auth-brand-mark::after { top: 18px; left: 8px; width: 11px; }
.auth-visual-copy {
  max-width: 530px;
  margin-top: clamp(70px, 13vh, 150px);
}
.auth-kicker,
.auth-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: #83f2d0;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .14em;
  line-height: 1.2;
  text-transform: uppercase;
}
.auth-kicker-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #83f2d0;
  box-shadow: 0 0 0 5px rgba(131, 242, 208, .12), 0 0 18px #83f2d0;
}
.auth-visual-copy h1 {
  max-width: 570px;
  margin: 0;
  color: #f7fbff;
  font-size: clamp(38px, 5vw, 68px);
  font-weight: 700;
  letter-spacing: -.065em;
  line-height: .99;
}
.auth-visual-copy h1 em {
  color: #8af1d0;
  font-style: normal;
}
.auth-visual-copy > p:last-child {
  max-width: 460px;
  margin: 24px 0 0;
  color: #aabbd0;
  font-size: 15px;
  line-height: 1.75;
}
.auth-constellation {
  position: relative;
  flex: 1 1 auto;
  min-height: 275px;
  margin: 26px -10px 0;
}
.auth-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(130, 226, 219, .18);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-19deg);
}
.auth-orbit-one { width: min(380px, 95%); height: 142px; }
.auth-orbit-two { width: min(330px, 84%); height: 224px; transform: translate(-50%, -50%) rotate(52deg); }
.auth-orbit-three { width: min(235px, 62%); height: 235px; border-color: rgba(142, 114, 255, .22); transform: translate(-50%, -50%) rotate(18deg); }
.auth-constellation-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 82px;
  height: 82px;
  border: 1px solid rgba(176, 255, 234, .6);
  border-radius: 27px 27px 27px 10px;
  background: linear-gradient(145deg, rgba(118, 244, 206, .27), rgba(71, 147, 255, .25));
  box-shadow: 0 0 0 12px rgba(108, 226, 216, .06), 0 18px 45px rgba(0, 0, 0, .3), inset 0 1px rgba(255,255,255,.32);
  color: #cffff0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .05em;
  transform: translate(-50%, -50%) rotate(-8deg);
}
.auth-constellation-core::before,
.auth-constellation-core::after {
  position: absolute;
  border: 1px solid rgba(132, 242, 214, .36);
  border-radius: 50%;
  content: '';
}
.auth-constellation-core::before { inset: -23px; }
.auth-constellation-core::after { inset: -42px; opacity: .4; }
.auth-node {
  position: absolute;
  width: 9px;
  height: 9px;
  border: 2px solid #a4f9dd;
  border-radius: 50%;
  background: #102345;
  box-shadow: 0 0 0 5px rgba(130, 243, 213, .09), 0 0 18px rgba(130, 243, 213, .7);
}
.auth-node-a { top: 24%; left: 20%; }
.auth-node-b { top: 20%; right: 18%; border-color: #a79bff; box-shadow: 0 0 0 5px rgba(167, 155, 255, .09), 0 0 18px rgba(167, 155, 255, .72); }
.auth-node-c { right: 24%; bottom: 18%; }
.auth-node-d { bottom: 24%; left: 19%; border-color: #ffc980; box-shadow: 0 0 0 5px rgba(255, 201, 128, .09), 0 0 18px rgba(255, 201, 128, .62); }
.auth-constellation-label {
  position: absolute;
  padding: 6px 9px;
  border: 1px solid rgba(173, 221, 239, .16);
  border-radius: 999px;
  background: rgba(9, 24, 52, .55);
  color: #9db2c9;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .03em;
  backdrop-filter: blur(10px);
}
.auth-label-a { top: 12%; left: 2%; }
.auth-label-b { top: 12%; right: 0; }
.auth-label-c { right: 4%; bottom: 8%; }
.auth-proof {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  color: #a4b8ce;
  font-size: 11px;
}
.auth-proof strong,
.auth-proof span { display: block; }
.auth-proof strong { margin-bottom: 2px; color: #e8f5ff; font-size: 12px; }
.auth-proof-avatars { display: flex; padding-left: 6px; }
.auth-proof-avatars span {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  margin-left: -6px;
  border: 2px solid #112441;
  border-radius: 50%;
  background: #647ef4;
  color: #fff;
  font-size: 9px;
  font-weight: 800;
}
.auth-proof-avatars span:nth-child(2) { background: #e782b7; }
.auth-proof-avatars span:nth-child(3) { background: #48bca8; }
.auth-proof-avatars span:nth-child(4) { background: #2f425e; }
.auth-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100dvh;
  background: var(--dc-card);
  color: var(--dc-ink);
}
.auth-panel-top {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 78px;
  padding: 20px clamp(24px, 5vw, 72px);
}
.auth-mobile-mark { display: none; color: var(--dc-navy); }
.auth-mobile-mark .auth-brand-mark { width: 28px; height: 28px; border-radius: 9px 9px 9px 3px; box-shadow: none; }
.auth-close {
  border: 0;
  background: transparent;
  color: var(--dc-muted);
  font: 700 12px inherit;
  cursor: pointer;
}
.auth-close:hover { color: var(--dc-teal); }
.auth-close span { margin-left: 5px; font-size: 15px; }
.auth-content {
  width: min(100%, 452px);
  margin: auto;
  padding: 30px clamp(24px, 5vw, 72px) 48px;
}
.auth-stepper { display: flex; gap: 5px; margin-bottom: 34px; }
.auth-stepper span {
  display: block;
  width: 30px;
  height: 4px;
  border-radius: 999px;
  background: var(--dc-line);
  transition: width .25s ease, background .25s ease;
}
.auth-stepper span.active { width: 56px; background: var(--dc-teal); }
.auth-eyebrow { margin-bottom: 13px; color: var(--dc-teal); }
.auth-content h2 {
  margin: 0;
  color: var(--dc-navy);
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: -.055em;
  line-height: 1.05;
}
.auth-subtitle {
  max-width: 390px;
  margin: 14px 0 27px;
  color: var(--dc-muted);
  font-size: 14px;
  line-height: 1.65;
}
.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin-bottom: 23px;
  padding: 4px;
  border: 1px solid var(--dc-line);
  border-radius: 12px;
  background: var(--dc-panel);
}
.auth-tab {
  min-height: 38px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--dc-muted);
  font: 800 12px inherit;
  cursor: pointer;
}
.auth-tab.active {
  background: var(--dc-card);
  color: var(--dc-navy);
  box-shadow: var(--shadow-1);
}
[data-theme="dark"] .auth-tab.active { background: var(--dc-teal); color: #061723; }
.auth-form { display: grid; gap: 16px; }
.auth-field { display: grid; gap: 7px; }
.auth-field label {
  color: var(--dc-navy);
  font-size: 12px;
  font-weight: 800;
}
.auth-input-wrap {
  display: flex;
  align-items: center;
  min-height: 50px;
  border: 1px solid var(--dc-line-strong);
  border-radius: 12px;
  background: var(--dc-card);
  transition: border-color .16s, box-shadow .16s, background .16s;
}
.auth-input-wrap:focus-within {
  border-color: var(--dc-teal);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--dc-teal) 15%, transparent);
}
.auth-input-wrap.is-valid { border-color: var(--dc-green-dark); }
.auth-input-wrap.is-invalid { border-color: var(--dc-red); }
.auth-input-icon {
  display: grid;
  place-items: center;
  flex: 0 0 41px;
  color: var(--dc-muted);
  font-size: 15px;
  font-weight: 800;
}
.auth-input-wrap input {
  width: 100%;
  min-width: 0;
  height: 48px;
  padding: 0 8px 0 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--dc-ink);
  font: 500 14px inherit;
}
.auth-input-wrap input::placeholder { color: color-mix(in srgb, var(--dc-muted) 65%, transparent); }
.auth-field-state {
  display: grid;
  place-items: center;
  flex: 0 0 34px;
  width: 16px;
  height: 16px;
  margin-right: 11px;
  border-radius: 50%;
  color: #fff;
  font-size: 10px;
  font-weight: 900;
}
.auth-input-wrap.is-valid .auth-field-state { background: var(--dc-green-dark); }
.auth-input-wrap.is-valid .auth-field-state::before { content: '✓'; }
.auth-input-wrap.is-invalid .auth-field-state { background: var(--dc-red); }
.auth-input-wrap.is-invalid .auth-field-state::before { content: '!'; }
.auth-reveal {
  flex: 0 0 auto;
  margin-right: 9px;
  padding: 6px 0 6px 5px;
  border: 0;
  background: transparent;
  color: var(--dc-teal);
  font: 800 11px inherit;
  cursor: pointer;
}
.auth-reveal:hover { text-decoration: underline; }
.auth-field-hint {
  color: var(--dc-muted);
  font-size: 10.5px;
  line-height: 1.4;
}
.auth-strength {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--dc-muted);
  font-size: 10.5px;
  font-weight: 700;
}
.auth-strength-track {
  width: 66px;
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--dc-bar-track);
}
.auth-strength-track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: #e08a36;
  transition: width .2s ease, background .2s ease;
}
.auth-strength.is-strong .auth-strength-track i { background: var(--dc-green-dark); }
.auth-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: -2px;
}
.auth-check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--dc-muted);
  font-size: 10.5px;
  cursor: pointer;
}
.auth-check input { position: absolute; opacity: 0; pointer-events: none; }
.auth-check span {
  display: grid;
  place-items: center;
  width: 16px;
  height: 16px;
  border: 1px solid var(--dc-line-strong);
  border-radius: 5px;
  background: var(--dc-card);
}
.auth-check input:checked + span { border-color: var(--dc-teal); background: var(--dc-teal); box-shadow: inset 0 0 0 3px var(--dc-card); }
.auth-check input:focus-visible + span { outline: 2px solid var(--dc-teal); outline-offset: 2px; }
.auth-link {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--dc-teal);
  font: 800 11px inherit;
  cursor: pointer;
}
.auth-link:hover { text-decoration: underline; }
.auth-back { justify-self: start; margin-top: -3px; }
.auth-error {
  margin: -2px 0 0;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--dc-red) 36%, transparent);
  border-radius: 9px;
  background: color-mix(in srgb, var(--dc-red) 9%, transparent);
  color: var(--dc-red);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
}
/* Google sign-in (shown only when the server advertises it) */
.auth-google-wrap { margin-top: 14px; }
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  color: var(--auth-muted, rgba(255,255,255,.55));
  font: 600 10px/1 inherit;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: currentColor; opacity: .35; }
.auth-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 13px;
  color: #fff;
  font: 700 13px inherit;
  text-decoration: none;
  transition: background .16s, border-color .16s, transform .16s;
}
.auth-google:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.45); }
.auth-google:focus-visible { outline: 2px solid #17e0b4; outline-offset: 2px; }
.auth-google::before {
  content: '';
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath fill='%234285F4' d='M17.64 9.2c0-.64-.06-1.25-.16-1.84H9v3.48h4.84a4.14 4.14 0 0 1-1.8 2.72v2.26h2.92a8.78 8.78 0 0 0 2.68-6.62z'/%3E%3Cpath fill='%2334A853' d='M9 18c2.43 0 4.47-.8 5.96-2.18l-2.92-2.26c-.8.54-1.84.86-3.04.86-2.34 0-4.33-1.58-5.04-3.71H.96v2.33A9 9 0 0 0 9 18z'/%3E%3Cpath fill='%23FBBC05' d='M3.96 10.71a5.41 5.41 0 0 1 0-3.42V4.96H.96a9 9 0 0 0 0 8.08l3-2.33z'/%3E%3Cpath fill='%23EA4335' d='M9 3.58c1.32 0 2.5.45 3.44 1.35l2.58-2.59A9 9 0 0 0 .96 4.96l3 2.33C4.67 5.16 6.66 3.58 9 3.58z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.auth-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  margin-top: 1px;
  border: 0;
  border-radius: 13px;
  background: linear-gradient(135deg, #147b88, #246fc6 78%);
  color: #fff;
  font: 800 13px inherit;
  cursor: pointer;
  box-shadow: 0 11px 25px rgba(20, 123, 136, .2);
  transition: transform .16s, box-shadow .16s, filter .16s;
}
.auth-submit:hover { filter: brightness(1.08); transform: translateY(-1px); box-shadow: 0 14px 30px rgba(20, 123, 136, .28); }
.auth-submit:focus-visible,
.auth-close:focus-visible,
.auth-tab:focus-visible,
.auth-link:focus-visible,
.auth-reveal:focus-visible,
.auth-success-continue:focus-visible,
.auth-code-row button:focus-visible { outline: 3px solid color-mix(in srgb, var(--dc-teal) 55%, transparent); outline-offset: 3px; }
.auth-submit:disabled { opacity: .7; cursor: wait; transform: none; }
.auth-submit.is-loading .auth-submit-arrow { animation: auth-spin .8s linear infinite; }
.auth-submit-arrow { font-size: 19px; line-height: 1; }
.auth-footnote {
  display: flex;
  gap: 7px;
  margin: 24px 0 0;
  color: var(--dc-muted);
  font-size: 10.5px;
  line-height: 1.5;
}
.auth-footnote span { color: var(--dc-teal); }
.auth-recovery-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 2px;
  padding: 11px 12px;
  border: 1px solid color-mix(in srgb, var(--dc-teal) 25%, var(--dc-line));
  border-radius: 11px;
  background: color-mix(in srgb, var(--dc-teal) 7%, var(--dc-card));
}
.auth-recovery-note p { margin: 0; color: var(--dc-muted); font-size: 11px; line-height: 1.5; }
.auth-note-icon { color: var(--dc-teal); font-weight: 900; }
.auth-success { animation: auth-rise .3s ease both; }
.auth-success-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  border-radius: 18px 18px 18px 6px;
  background: var(--dc-green-soft);
  color: var(--dc-green-dark);
  font-size: 26px;
  font-weight: 900;
}
.auth-success-kicker { margin: 0 0 8px; color: var(--dc-teal); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.auth-success h3 { margin: 0; color: var(--dc-navy); font-size: 26px; letter-spacing: -.045em; line-height: 1.1; }
.auth-success > p:not(.auth-success-kicker) { margin: 13px 0 19px; color: var(--dc-muted); font-size: 13px; line-height: 1.6; }
.auth-code-row { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; }
.auth-code-row code {
  flex: 1;
  min-width: 0;
  padding: 14px 12px;
  overflow: auto;
  border: 1px dashed color-mix(in srgb, var(--dc-teal) 55%, var(--dc-line));
  border-radius: 11px;
  background: color-mix(in srgb, var(--dc-teal) 7%, var(--dc-card));
  color: var(--dc-navy);
  font: 800 16px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: .08em;
  white-space: nowrap;
}
.auth-code-row button,
.auth-success-continue {
  border: 1px solid var(--dc-line-strong);
  border-radius: 10px;
  background: var(--dc-card);
  color: var(--dc-navy);
  font: 800 11px inherit;
  cursor: pointer;
}
.auth-code-row button { padding: 13px 12px; }
.auth-code-row button:hover { border-color: var(--dc-teal); color: var(--dc-teal); }
.auth-success-continue { width: 100%; min-height: 48px; border-color: transparent; background: var(--dc-navy); color: #fff; }
.auth-success-continue:hover { background: var(--dc-teal); }
@keyframes auth-rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes auth-spin { to { transform: translateX(3px) rotate(360deg); } }

@media (max-width: 900px) {
  body.auth-route { overflow: auto; }
  .auth-shell { grid-template-columns: 1fr; min-height: auto; }
  .auth-visual { min-height: 390px; padding: 28px clamp(24px, 7vw, 68px); }
  .auth-visual-copy { margin-top: 62px; }
  .auth-visual-copy h1 { max-width: 600px; font-size: clamp(36px, 8vw, 58px); }
  .auth-constellation { position: absolute; right: 4%; bottom: -36px; width: 45%; min-height: 255px; margin: 0; opacity: .9; }
  .auth-proof { margin-top: 25px; }
  .auth-panel { min-height: 680px; }
  .auth-panel-top { min-height: 66px; padding: 16px clamp(24px, 7vw, 68px); }
  .auth-content { margin: 0 auto; padding-top: 28px; padding-bottom: 55px; }
}
@media (max-width: 560px) {
  .auth-visual { min-height: 252px; padding: 22px 20px 25px; }
  .auth-visual-copy { margin-top: 46px; }
  .auth-visual-copy .auth-kicker { margin-bottom: 11px; font-size: 9px; }
  .auth-visual-copy h1 { max-width: 330px; font-size: 34px; }
  .auth-visual-copy > p:last-child { max-width: 340px; margin-top: 13px; font-size: 12px; line-height: 1.55; }
  .auth-constellation, .auth-proof, .auth-brand { display: none; }
  .auth-mobile-mark { display: inline-flex; }
  .auth-panel-top { justify-content: space-between; padding: 16px 20px; }
  .auth-close { font-size: 11px; }
  .auth-content { width: 100%; padding: 22px 20px 38px; }
  .auth-stepper { margin-bottom: 26px; }
  .auth-content h2 { font-size: 31px; }
  .auth-subtitle { margin: 12px 0 22px; font-size: 13px; }
  .auth-tabs { margin-bottom: 19px; }
  .auth-options { align-items: flex-start; flex-direction: column; gap: 10px; }
  .auth-check { order: 2; }
  .auth-link { order: 1; }
  .auth-recovery-note p { font-size: 10.5px; }
  .auth-code-row code { font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .auth-stepper span,
  .auth-input-wrap,
  .auth-submit,
  .auth-strength-track i { transition: none; }
  .auth-success { animation: none; }
  .auth-submit.is-loading .auth-submit-arrow { animation: none; }
}

/* ============================================================
   Auth visual refresh — contained dark workspace
   Reference-inspired composition: a soft outer canvas, browser-like
   product frame, purple journey panel, and a calm black auth surface.
   This layer intentionally sits last so auth styling is independent of
   the study shell's light/dark theme tokens.
   ============================================================ */
.auth-gate[hidden] { display: none !important; }
body.auth-route {
  overflow: hidden;
  background: #74787a;
}
body.auth-route .auth-gate {
  display: grid;
  place-items: center;
  padding: clamp(18px, 8vh, 78px) clamp(16px, 8vw, 100px);
  background:
    radial-gradient(circle at 50% 0%, rgba(255,255,255,.12), transparent 46%),
    #74787a;
}
.auth-shell {
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  grid-template-rows: 44px minmax(0, 1fr);
  width: min(1000px, 100%);
  height: min(746px, calc(100dvh - 64px));
  min-height: 640px;
  margin: auto;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  background: #050505;
  box-shadow: 0 30px 80px rgba(16, 18, 19, .32), 0 4px 18px rgba(0,0,0,.18);
}
.auth-window-bar {
  grid-column: 1 / -1;
  grid-row: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  padding: 0 15px;
  border-bottom: 1px solid #151515;
  background: #070707;
  color: #717171;
  font-size: 12px;
}
.auth-window-dots,
.auth-window-actions {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: 75px;
}
.auth-window-dots i {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff5f57;
}
.auth-window-dots i:nth-child(2) { background: #febc2e; }
.auth-window-dots i:nth-child(3) { background: #28c840; }
.auth-window-title {
  position: absolute;
  left: 50%;
  max-width: 52%;
  overflow: hidden;
  color: #696969;
  font: 500 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: .01em;
  text-overflow: ellipsis;
  white-space: nowrap;
  transform: translateX(-50%);
}
.auth-window-lock { margin-right: 5px; color: #868686; font-size: 12px; }
.auth-window-actions { justify-content: flex-end; gap: 13px; color: #777; font-size: 14px; }
.auth-visual {
  grid-column: 1;
  grid-row: 2;
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  margin: 0 0 8px 8px;
  overflow: hidden;
  padding: 28px clamp(24px, 4vw, 48px) 24px;
  border-radius: 25px;
  background:
    radial-gradient(ellipse at 43% -6%, rgba(255,243,255,.96) 0%, rgba(226,160,255,.76) 18%, rgba(166,73,239,.2) 40%, transparent 56%),
    radial-gradient(circle at 93% 30%, rgba(195,77,255,.52), transparent 39%),
    linear-gradient(158deg, #ad72e9 0%, #6911c7 37%, #260052 66%, #09070e 100%);
}
.auth-visual::before {
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(to bottom, transparent 4%, black 30%, black 80%, transparent);
  opacity: .34;
}
.auth-visual::after {
  right: -30%;
  bottom: -34%;
  z-index: -1;
  width: 78%;
  aspect-ratio: 1;
  border: 1px solid rgba(239,194,255,.22);
  border-radius: 50%;
  box-shadow: 0 0 0 38px rgba(218,143,255,.06), 0 0 0 78px rgba(218,143,255,.035), inset 0 0 70px rgba(255,255,255,.05);
}
.auth-visual > * { position: relative; z-index: 1; }
/* Banner video background — behind all panel content (later rule overrides the generic child rule) */
.auth-visual > :not(.auth-video-bg) { position: relative; z-index: 1; }
.auth-video-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}
.auth-brand {
  flex: 0 0 auto;
  color: rgba(255,255,255,.94);
  font-size: 13px;
  letter-spacing: -.01em;
}
.auth-brand:hover { color: #fff; }
.auth-brand-mark {
  width: 30px;
  height: 30px;
  border-color: rgba(255,255,255,.48);
  border-radius: 10px 10px 10px 3px;
  background: linear-gradient(145deg, #f2ddff 0%, #c17cff 42%, #7353e8 100%);
  box-shadow: 0 7px 22px rgba(57, 2, 94, .3), inset 0 1px rgba(255,255,255,.55);
}
.auth-brand-mark::before,
.auth-brand-mark::after { background: #2b0757; }
.auth-visual-copy {
  width: min(100%, 390px);
  margin: auto auto 25px;
  text-align: center;
}
.auth-kicker,
.auth-eyebrow {
  justify-content: center;
  margin-bottom: 14px;
  color: #f2d5ff;
  font-size: 9px;
  letter-spacing: .18em;
}
.auth-kicker-dot {
  width: 6px;
  height: 6px;
  background: #f3d8ff;
  box-shadow: 0 0 0 4px rgba(245,216,255,.14), 0 0 15px #f3d8ff;
}
.auth-visual-copy h1 {
  max-width: 390px;
  color: #fffaff;
  font-size: clamp(34px, 4.2vw, 47px);
  letter-spacing: -.07em;
  line-height: 1.01;
}
.auth-visual-copy h1 em { color: #f3ceff; }
.auth-visual-copy > p:last-child {
  max-width: 350px;
  margin: 16px auto 0;
  color: rgba(255,244,255,.7);
  font-size: 12px;
  line-height: 1.6;
}
.auth-journey {
  display: grid;
  gap: 8px;
  width: min(100%, 390px);
  margin: 0 auto;
}
.auth-journey-item {
  display: grid;
  grid-template-columns: 29px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 9px 12px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  background: rgba(10, 4, 18, .43);
  color: rgba(255,255,255,.75);
  box-shadow: inset 0 1px rgba(255,255,255,.05);
  transition: background .2s, border-color .2s, transform .2s, box-shadow .2s;
}
.auth-journey-item.active {
  border-color: rgba(255,255,255,.86);
  background: rgba(255,255,255,.96);
  color: #17111d;
  box-shadow: 0 8px 20px rgba(17,0,36,.18), inset 0 1px rgba(255,255,255,.95);
  transform: translateX(2px);
}
.auth-journey-number {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: rgba(255,255,255,.12);
  color: #d8b9eb;
  font: 800 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}
.auth-journey-item.active .auth-journey-number { background: #17111d; color: #fff; }
.auth-journey-copy { min-width: 0; }
.auth-journey-copy strong,
.auth-journey-copy small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.auth-journey-copy strong { font-size: 11px; font-weight: 800; }
.auth-journey-copy small { margin-top: 2px; color: rgba(255,255,255,.52); font-size: 9.5px; }
.auth-journey-item.active .auth-journey-copy small { color: #75697b; }
.auth-journey-mark { color: #d6b6e9; font-size: 17px; text-align: right; }
.auth-journey-item.active .auth-journey-mark { color: #17111d; }
.auth-visual-footer {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  color: rgba(255,255,255,.8);
  font-size: 10px;
}
.auth-visual-footer strong,
.auth-visual-footer small { display: block; }
.auth-visual-footer strong { font-size: 10px; }
.auth-visual-footer small { margin-top: 1px; color: rgba(255,255,255,.48); }
.auth-footer-orb {
  width: 23px;
  height: 23px;
  border: 1px solid rgba(255,255,255,.45);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #c78cff 28%, #6420c2 70%);
  box-shadow: 0 0 14px rgba(224,161,255,.45);
}
.auth-panel {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  background: #050505;
  color: #f4f2f6;
}
.auth-panel-top {
  min-height: 64px;
  padding: 17px 30px;
}
.auth-mobile-mark { color: #f7f4fa; }
.auth-close { color: #858187; font-size: 11px; }
.auth-close:hover { color: #d7b6ff; }
.auth-content {
  width: min(100%, 420px);
  margin: auto;
  padding: 8px 34px 30px;
}
.auth-stepper { gap: 4px; margin-bottom: 27px; }
.auth-stepper span { width: 24px; height: 3px; background: #2b292d; }
.auth-stepper span.active { width: 48px; background: #c691ff; }
.auth-eyebrow { justify-content: flex-start; margin-bottom: 11px; color: #c691ff; }
.auth-content h2 { color: #f8f6fa; font-size: clamp(28px, 3vw, 35px); letter-spacing: -.06em; line-height: 1.04; }
.auth-subtitle { max-width: 330px; margin: 12px 0 22px; color: #8e8992; font-size: 12px; line-height: 1.6; }
.auth-tabs {
  gap: 3px;
  margin-bottom: 20px;
  padding: 3px;
  border-color: #29272b;
  border-radius: 9px;
  background: #111012;
}
.auth-tab { min-height: 34px; border-radius: 7px; color: #817c85; font-size: 11px; }
.auth-tab.active {
  background: #28222e;
  color: #f5eaff;
  box-shadow: inset 0 0 0 1px rgba(198,145,255,.28), 0 2px 7px rgba(0,0,0,.25);
}
[data-theme="dark"] .auth-tab.active { background: #28222e; color: #f5eaff; }
.auth-form { gap: 13px; }
.auth-field { gap: 6px; }
.auth-field label { color: #e8e4ea; font-size: 10.5px; letter-spacing: .01em; }
.auth-input-wrap {
  min-height: 45px;
  border-color: #37343a;
  border-radius: 8px;
  background: #171618;
}
.auth-input-wrap:focus-within {
  border-color: #b77cff;
  background: #1b181d;
  box-shadow: 0 0 0 3px rgba(183,124,255,.14);
}
.auth-input-wrap.is-valid { border-color: #60d9ae; }
.auth-input-wrap.is-invalid { border-color: #e56e7d; }
.auth-input-icon { flex-basis: 34px; color: #77717b; font-size: 13px; }
.auth-input-wrap input { height: 43px; color: #f6f2f8; font-size: 12px; }
.auth-input-wrap input::placeholder { color: #68636b; }
.auth-field-state { flex-basis: 27px; margin-right: 9px; }
.auth-reveal { margin-right: 9px; color: #c691ff; font-size: 10px; }
.auth-field-hint { color: #716b74; font-size: 9px; }
.auth-strength { color: #817a85; font-size: 9.5px; }
.auth-strength-track { width: 56px; height: 4px; background: #302d32; }
.auth-strength-track i { background: #d095ff; }
.auth-strength.is-strong .auth-strength-track i { background: #62dcae; }
.auth-options { margin-top: 0; }
.auth-check { color: #817b84; font-size: 9.5px; }
.auth-check span { width: 14px; height: 14px; border-color: #4a464e; border-radius: 4px; background: #151316; }
.auth-check input:checked + span { border-color: #c691ff; background: #c691ff; box-shadow: inset 0 0 0 3px #171618; }
.auth-link { color: #c691ff; font-size: 10px; }
.auth-error {
  padding: 9px 10px;
  border-color: rgba(229,110,125,.35);
  border-radius: 7px;
  background: rgba(229,110,125,.1);
  color: #ff9eaa;
  font-size: 10px;
}
.auth-submit {
  min-height: 46px;
  margin-top: 4px;
  border-radius: 8px;
  background: linear-gradient(135deg, #e8fff4 0%, #b8f6db 100%);
  color: #111d19;
  font-size: 11px;
  box-shadow: 0 9px 22px rgba(114,225,177,.11);
}
.auth-submit:hover { filter: brightness(1.06); box-shadow: 0 12px 26px rgba(114,225,177,.2); }
.auth-submit:focus-visible,
.auth-close:focus-visible,
.auth-tab:focus-visible,
.auth-link:focus-visible,
.auth-reveal:focus-visible,
.auth-success-continue:focus-visible,
.auth-code-row button:focus-visible { outline-color: #c691ff; }
.auth-footnote { margin-top: 19px; color: #66616a; font-size: 9px; }
.auth-footnote span { color: #b985f0; }
.auth-recovery-note {
  padding: 10px;
  border-color: rgba(198,145,255,.26);
  border-radius: 8px;
  background: rgba(198,145,255,.08);
}
.auth-recovery-note p { color: #a49aa9; font-size: 10px; }
.auth-note-icon { color: #c691ff; }
.auth-success-icon { background: rgba(97,220,174,.13); color: #6be0b4; }
.auth-success-kicker { color: #c691ff; font-size: 9px; }
.auth-success h3 { color: #f8f5fa; font-size: 25px; }
.auth-success > p:not(.auth-success-kicker) { color: #98919b; font-size: 11px; }
.auth-code-row code { border-color: rgba(198,145,255,.42); background: rgba(198,145,255,.08); color: #f1dcff; font-size: 13px; }
.auth-code-row button { border-color: #49434f; background: #171618; color: #e6d8ef; }
.auth-code-row button:hover { border-color: #c691ff; color: #d7b6ff; }
.auth-success-continue { border-color: transparent; background: #c691ff; color: #170d20; }
.auth-success-continue:hover { background: #d5adff; }

@media (max-width: 760px) {
  body.auth-route { overflow: auto; }
  body.auth-route .auth-gate { display: block; min-height: 100dvh; padding: 0; background: #050505; }
  .auth-shell {
    grid-template-columns: 1fr;
    grid-template-rows: 44px auto auto;
    width: 100%;
    height: auto;
    min-height: 100dvh;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
  .auth-window-bar { grid-column: 1; }
  .auth-visual {
    grid-column: 1;
    grid-row: 2;
    min-height: 355px;
    margin: 0 8px 0;
    padding: 23px clamp(22px, 6vw, 48px) 22px;
    border-radius: 23px;
  }
  .auth-visual-copy { margin: auto auto 20px; }
  .auth-visual-copy h1 { font-size: clamp(34px, 7vw, 47px); }
  .auth-journey { width: min(100%, 500px); }
  .auth-visual-footer { display: none; }
  .auth-panel {
    grid-column: 1;
    grid-row: 3;
    min-height: 630px;
    overflow: visible;
  }
  .auth-panel-top { min-height: 62px; padding: 16px clamp(22px, 6vw, 48px); }
  .auth-content { padding-top: 16px; padding-bottom: 45px; }
}
@media (max-width: 560px) {
  body.auth-route .auth-gate { background: #050505; }
  .auth-window-title { max-width: 44%; font-size: 9px; }
  .auth-window-actions { width: 65px; gap: 9px; }
  .auth-visual {
    min-height: 316px;
    margin: 0 6px;
    padding: 20px 18px 18px;
    border-radius: 20px;
  }
  .auth-brand { font-size: 12px; }
  .auth-brand-mark { width: 27px; height: 27px; }
  .auth-visual-copy { margin: auto auto 17px; }
  .auth-visual-copy .auth-kicker { margin-bottom: 10px; font-size: 8px; }
  .auth-visual-copy h1 { max-width: 330px; font-size: 32px; }
  .auth-visual-copy > p:last-child { max-width: 320px; margin-top: 12px; font-size: 11px; }
  .auth-journey { gap: 6px; }
  .auth-journey-item { grid-template-columns: 25px minmax(0, 1fr) 16px; min-height: 45px; gap: 8px; padding: 7px 9px; border-radius: 8px; }
  .auth-journey-number { width: 21px; height: 21px; font-size: 8px; }
  .auth-journey-copy strong { font-size: 9.5px; }
  .auth-journey-copy small { font-size: 8px; }
  .auth-journey-mark { font-size: 14px; }
  .auth-panel { min-height: 650px; }
  .auth-mobile-mark { display: inline-flex; font-size: 12px; }
  .auth-mobile-mark .auth-brand-mark { width: 25px; height: 25px; }
  .auth-panel-top { justify-content: space-between; padding: 15px 20px; }
  .auth-close { font-size: 10px; }
  .auth-content { width: 100%; padding: 13px 20px 38px; }
  .auth-stepper { margin-bottom: 23px; }
  .auth-content h2 { font-size: 30px; }
  .auth-subtitle { margin: 11px 0 20px; font-size: 12px; }
  .auth-tabs { margin-bottom: 18px; }
  .auth-options { align-items: flex-start; flex-direction: column; gap: 9px; }
  .auth-check { order: 2; }
  .auth-link { order: 1; }
  .auth-code-row code { font-size: 12px; }
}

/* ============================================================
   Clean auth finish — focused account card
   Keep the app palette and real logo, remove marketing decoration
   from the sign-in task so the form is the visual priority.
   ============================================================ */
body.auth-route .auth-gate {
  display: grid;
  place-items: center;
  padding: 28px 16px;
}
body.auth-route .auth-shell {
  display: block;
  width: min(520px, 100%);
  height: auto;
  min-height: 0;
  overflow: hidden;
  border-radius: 24px;
  background: #fff;
  border: 1px solid rgba(5,25,45,.1);
  box-shadow: 0 24px 60px rgba(5,28,44,.14), 0 3px 12px rgba(5,28,44,.06);
}
body.auth-route .auth-visual { display: none; }
body.auth-route .auth-panel {
  display: block;
  min-height: 0;
  overflow: visible;
  background: #fff;
}
body.auth-route .auth-panel-top {
  min-height: 76px;
  padding: 24px 30px 4px;
  justify-content: space-between;
}
body.auth-route .auth-mobile-mark {
  display: inline-flex;
  gap: 9px;
  color: var(--dc-navy);
  font-size: 13px;
}
body.auth-route .auth-content {
  width: 100%;
  margin: 0;
  padding: 26px 30px 32px;
}
body.auth-route .auth-stepper { display: none; }
body.auth-route .auth-eyebrow {
  justify-content: flex-start;
  margin-bottom: 10px;
  font-size: 10px;
}
body.auth-route .auth-content h2 {
  max-width: 390px;
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1.08;
}
body.auth-route .auth-subtitle {
  max-width: 390px;
  margin: 12px 0 24px;
  font-size: 13px;
}
body.auth-route .auth-tabs { margin-bottom: 22px; }
body.auth-route .auth-form { gap: 15px; }
body.auth-route .auth-submit { margin-top: 3px; }
body.auth-route .auth-footnote { margin-top: 21px; }

@media (max-width: 560px) {
  body.auth-route .auth-gate {
    display: grid;
    padding: 14px;
  }
  body.auth-route .auth-shell {
    width: 100%;
    border-radius: 20px;
  }
  body.auth-route .auth-panel-top {
    min-height: 68px;
    padding: 19px 20px 2px;
  }
  body.auth-route .auth-content {
    padding: 22px 20px 28px;
  }
  body.auth-route .auth-content h2 { font-size: 30px; }
  body.auth-route .auth-subtitle { margin-bottom: 20px; }
}

/* ============================================================
   Auth brand finish — light Hex Knowledge palette
   Keep the reference-inspired frame and journey structure, but make
   the experience feel native to the learning app's light interface.
   ============================================================ */
body.auth-route {
  /* Auth is intentionally light even when the learner last used the app's
     dark theme: the sign-in surface should match the primary app palette. */
  --dc-navy: #05192d;
  --dc-navy-2: #12344d;
  --dc-ink: #182635;
  --dc-muted: #5b6b7b;
  --dc-canvas: #f6f7fb;
  --dc-card: #ffffff;
  --dc-panel: #efeff5;
  --dc-line: rgba(48, 57, 105, .14);
  --dc-line-strong: rgba(48, 57, 105, .6);
  --dc-border: var(--dc-line);
  --dc-green: #03ef62;
  --dc-green-dark: #02c94f;
  --dc-green-soft: #e6fcef;
  --dc-green-ink: #0a6b34;
  --dc-bar-track: #dfe6ee;
  --dc-teal: #097a8d;
  --dc-red: #e45858;
  --grad-green: linear-gradient(135deg, #03ef62 0%, #05c95a 60%, #02b351 100%);
  --shadow-1: 0 1px 3px rgba(5, 28, 44, .08), 0 1px 2px rgba(5, 28, 44, .06);
  --shadow-2: 0 6px 20px rgba(5, 28, 44, .10);
  background: #eef2f5;
  color: var(--dc-ink);
}
body.auth-route .auth-gate {
  background:
    radial-gradient(circle at 50% -12%, rgba(255,255,255,.9), transparent 47%),
    linear-gradient(145deg, #f7f9fb 0%, #eef3f6 58%, #e7eef3 100%);
}
.auth-shell {
  border-color: rgba(5,25,45,.12);
  background: #fff;
  box-shadow: 0 28px 70px rgba(5, 28, 44, .18), 0 4px 16px rgba(5, 28, 44, .08);
}
.auth-window-bar {
  border-bottom-color: #e3e9ee;
  background: #fff;
  color: #718292;
}
.auth-window-title { color: #647789; }
.auth-window-lock { color: #097a8d; }
.auth-window-actions { color: #7b8d9b; }
.auth-visual {
  background:
    radial-gradient(ellipse at 43% -8%, rgba(255,255,255,.98) 0%, rgba(239,255,247,.9) 20%, rgba(213,249,229,.55) 42%, transparent 59%),
    radial-gradient(circle at 96% 20%, rgba(3,239,98,.19), transparent 38%),
    radial-gradient(circle at 6% 88%, rgba(45,108,223,.13), transparent 42%),
    linear-gradient(155deg, #eafcf2 0%, #d7f3e4 40%, #d9f1f4 73%, #eaf2fb 100%);
}
.auth-visual::before {
  background-image:
    linear-gradient(rgba(5,25,45,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5,25,45,.055) 1px, transparent 1px);
  opacity: .5;
}
.auth-visual::after {
  border-color: rgba(9,122,141,.18);
  box-shadow: 0 0 0 38px rgba(9,122,141,.055), 0 0 0 78px rgba(45,108,223,.035), inset 0 0 70px rgba(255,255,255,.3);
}
.auth-brand { color: var(--dc-navy); }
.auth-brand:hover { color: var(--dc-teal); }
.auth-brand-mark {
  border-color: rgba(255,255,255,.82);
  background: linear-gradient(135deg, #03ef62 0%, #54dcb3 48%, #2d6cdf 100%);
  box-shadow: 0 7px 22px rgba(9,122,141,.18), inset 0 1px rgba(255,255,255,.75);
}
.auth-brand-mark::before,
.auth-brand-mark::after { background: #05192d; }
.auth-kicker,
.auth-eyebrow { color: var(--dc-teal); }
.auth-kicker-dot {
  background: var(--dc-green-dark);
  box-shadow: 0 0 0 4px rgba(3,201,79,.13), 0 0 15px rgba(3,201,79,.55);
}
.auth-visual-copy h1 { color: var(--dc-navy); }
.auth-visual-copy h1 em { color: var(--dc-teal); }
.auth-visual-copy > p:last-child { color: #456274; }
.auth-journey-item {
  border-color: rgba(5,25,45,.14);
  background: rgba(255,255,255,.48);
  color: var(--dc-navy-2);
  box-shadow: inset 0 1px rgba(255,255,255,.7), 0 4px 12px rgba(5,25,45,.04);
}
.auth-journey-item.active {
  border-color: rgba(255,255,255,.95);
  background: rgba(255,255,255,.96);
  color: var(--dc-navy);
  box-shadow: 0 8px 20px rgba(5,25,45,.12), inset 0 1px rgba(255,255,255,.98);
}
.auth-journey-number {
  background: rgba(9,122,141,.12);
  color: var(--dc-teal);
}
.auth-journey-item.active .auth-journey-number { background: var(--dc-navy); color: #fff; }
.auth-journey-copy small { color: #557080; }
.auth-journey-item.active .auth-journey-copy small { color: var(--dc-muted); }
.auth-journey-mark { color: var(--dc-teal); }
.auth-journey-item.active .auth-journey-mark { color: var(--dc-navy); }
.auth-visual-footer { color: var(--dc-navy-2); }
.auth-visual-footer small { color: var(--dc-muted); }
.auth-footer-orb {
  border-color: rgba(5,25,45,.18);
  background: radial-gradient(circle at 35% 30%, #fff, #75e8b6 28%, #2d6cdf 78%);
  box-shadow: 0 0 14px rgba(9,122,141,.28);
}
.auth-panel {
  background: #fff;
  color: var(--dc-ink);
}
.auth-mobile-mark { color: var(--dc-navy); }
.auth-close { color: var(--dc-muted); }
.auth-close:hover { color: var(--dc-teal); }
.auth-stepper span { background: #dce5eb; }
.auth-stepper span.active { background: var(--dc-teal); }
.auth-eyebrow { color: var(--dc-teal); }
body.auth-route .auth-content h2 { color: var(--dc-navy); }
body.auth-route .auth-subtitle { color: var(--dc-muted); }
.auth-tabs {
  border-color: var(--dc-line);
  background: #eef3f6;
}
body.auth-route .auth-tab { color: var(--dc-muted); }
body.auth-route .auth-tab.active {
  background: #fff;
  color: var(--dc-navy);
  box-shadow: var(--shadow-1);
}
body.auth-route .auth-field label { color: var(--dc-navy); }
.auth-input-wrap {
  border-color: #b8c7d1;
  background: #fff;
}
.auth-input-wrap:focus-within {
  border-color: var(--dc-teal);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(9,122,141,.13);
}
.auth-input-wrap.is-valid { border-color: var(--dc-green-dark); }
.auth-input-wrap.is-invalid { border-color: var(--dc-red); }
.auth-input-icon { color: #718292; }
.auth-input-wrap input { color: var(--dc-ink); }
.auth-input-wrap input::placeholder { color: #8293a0; }
.auth-field-state { color: #fff; }
.auth-reveal { color: var(--dc-teal); }
.auth-field-hint,
.auth-strength,
.auth-check { color: var(--dc-muted); }
.auth-strength-track { background: var(--dc-bar-track); }
.auth-strength-track i { background: var(--dc-teal); }
.auth-strength.is-strong .auth-strength-track i { background: var(--dc-green-dark); }
.auth-check span {
  border-color: #aebdc7;
  background: #fff;
}
.auth-check input:checked + span {
  border-color: var(--dc-teal);
  background: var(--dc-teal);
  box-shadow: inset 0 0 0 3px #fff;
}
.auth-link { color: var(--dc-teal); }
.auth-error {
  border-color: rgba(228,88,88,.3);
  background: #fff1f1;
  color: #b33e3e;
}
.auth-submit {
  background: var(--grad-navy);
  color: #fff;
  box-shadow: 0 9px 22px rgba(5, 25, 45, .22);
}
.auth-submit:hover { box-shadow: 0 12px 26px rgba(5, 25, 45, .32); }
.auth-submit:focus-visible,
.auth-close:focus-visible,
.auth-tab:focus-visible,
.auth-link:focus-visible,
.auth-reveal:focus-visible,
.auth-success-continue:focus-visible,
.auth-code-row button:focus-visible { outline-color: var(--dc-teal); }
.auth-footnote { color: var(--dc-muted); }
.auth-footnote span { color: var(--dc-teal); }
.auth-recovery-note {
  border-color: rgba(9,122,141,.24);
  background: #edf9f7;
}
.auth-recovery-note p { color: var(--dc-muted); }
.auth-note-icon { color: var(--dc-teal); }
.auth-success-icon { background: var(--dc-green-soft); color: var(--dc-green-ink); }
.auth-success-kicker { color: var(--dc-teal); }
.auth-success h3 { color: var(--dc-navy); }
.auth-success > p:not(.auth-success-kicker) { color: var(--dc-muted); }
.auth-code-row code {
  border-color: rgba(9,122,141,.4);
  background: #edf9f7;
  color: var(--dc-navy);
}
.auth-code-row button {
  border-color: #b8c7d1;
  background: #fff;
  color: var(--dc-navy);
}
.auth-code-row button:hover { border-color: var(--dc-teal); color: var(--dc-teal); }
.auth-success-continue { background: var(--dc-navy); color: #fff; }
.auth-success-continue:hover { background: var(--dc-teal); }

/* Use the same real brand asset as the study shell instead of a CSS-drawn mark. */
body.auth-route .auth-brand-mark {
  display: block;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  border: 0;
  border-radius: 9px;
  background: #fff;
  box-shadow: 0 5px 14px rgba(5, 28, 44, .14);
  object-fit: cover;
  transform: none;
}
body.auth-route .auth-brand-mark::before,
body.auth-route .auth-brand-mark::after { display: none; }
body.auth-route .auth-mobile-mark .auth-brand-mark {
  width: 27px;
  height: 27px;
  flex-basis: 27px;
  border-radius: 8px;
  box-shadow: 0 3px 9px rgba(5, 28, 44, .12);
}
/* Remove the reference image's browser chrome from the real product UI. */
.auth-shell {
  grid-template-rows: minmax(0, 1fr);
  min-height: 620px;
  height: min(720px, calc(100dvh - 56px));
  border-radius: 20px;
}
.auth-visual {
  grid-row: 1;
  margin: 0;
  border-radius: 20px 0 0 20px;
}
.auth-panel {
  grid-row: 1;
}
@media (max-width: 760px) {
  .auth-shell {
    grid-template-rows: auto auto;
    height: auto;
    min-height: 100dvh;
    border-radius: 0;
  }
  .auth-visual {
    grid-row: 1;
    margin: 0 8px 0;
    border-radius: 23px;
  }
  .auth-panel { grid-row: 2; }
}

/* Restore the split composition with concise copy: the visual style stays,
   while the page avoids a long marketing block above the form. */
body.auth-route .auth-gate {
  display: grid;
  place-items: center;
  padding: 28px 16px;
}
body.auth-route .auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
  grid-template-rows: minmax(0, 1fr);
  width: min(1000px, 100%);
  height: min(720px, calc(100dvh - 56px));
  min-height: 620px;
  overflow: hidden;
  border-radius: 20px;
}
body.auth-route .auth-visual {
  display: flex;
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  min-height: 0;
  margin: 0;
  border-radius: 20px 0 0 20px;
}
body.auth-route .auth-panel {
  display: flex;
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  min-height: 0;
  overflow: auto;
}
body.auth-route .auth-panel-top {
  min-height: 64px;
  padding: 17px 30px;
  justify-content: flex-end;
}
body.auth-route .auth-mobile-mark { display: none; }
body.auth-route .auth-content {
  width: min(100%, 420px);
  margin: auto;
  padding: 8px 30px 30px;
}
body.auth-route .auth-stepper { display: flex; }
body.auth-route .auth-visual-copy h1 { max-width: 390px; }
body.auth-route .auth-visual-copy > p:last-child { max-width: 330px; }
body.auth-route .auth-journey { width: min(100%, 390px); }
/* Wide screens: the card scales up gently instead of staying laptop-sized
   in a sea of empty gate (measured ~460px dead space per side at 1920px).
   Must stay AFTER the base .auth-content rule above — equal specificity,
   later position wins. */
@media (min-width: 1440px) {
  body.auth-route .auth-shell { width: min(1160px, calc(100vw - 96px)); height: min(780px, calc(100dvh - 64px)); }
  body.auth-route .auth-content { width: min(100%, 540px); }
}
@media (min-width: 1720px) {
  body.auth-route .auth-shell { width: min(1280px, calc(100vw - 128px)); height: min(820px, calc(100dvh - 72px)); }
  body.auth-route .auth-content { width: min(100%, 580px); }
}

@media (max-width: 760px) {
  body.auth-route .auth-gate {
    display: block;
    min-height: 100dvh;
    padding: 0;
  }
  body.auth-route .auth-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    width: 100%;
    height: auto;
    min-height: 100dvh;
    border-radius: 0;
  }
  body.auth-route .auth-visual {
    grid-column: 1;
    grid-row: 1;
    min-height: 355px;
    margin: 0 8px;
    border-radius: 23px;
  }
  body.auth-route .auth-panel {
    grid-column: 1;
    grid-row: 2;
    min-height: 630px;
    overflow: visible;
  }
  body.auth-route .auth-panel-top {
    min-height: 62px;
    padding: 16px clamp(22px, 6vw, 48px);
    justify-content: space-between;
  }
  body.auth-route .auth-mobile-mark { display: inline-flex; }
  body.auth-route .auth-content {
    width: min(100%, 520px);
    padding: 16px clamp(22px, 6vw, 48px) 45px;
  }
}

@media (max-width: 560px) {
  body.auth-route .auth-gate { padding: 0; }
  body.auth-route .auth-shell { min-height: 100dvh; }
  body.auth-route .auth-visual { min-height: 316px; margin: 0 6px; border-radius: 20px; }
  body.auth-route .auth-panel { min-height: 650px; }
  body.auth-route .auth-panel-top { padding: 15px 20px; }
  body.auth-route .auth-content { width: 100%; padding: 13px 20px 38px; }
}

/* ============================================================
   Auth banner video — text protection
   banner.mp4 plays behind the sign-in visual panel. The light
   palette above assumes a light panel, so force light text and
   add a scrim so the copy stays readable over the dark video.
   ============================================================ */
.auth-visual > .auth-video-scrim {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(4, 14, 30, .58) 0%, rgba(4, 14, 30, .18) 38%, rgba(4, 14, 30, .22) 62%, rgba(4, 14, 30, .62) 100%);
  pointer-events: none;
}
.auth-visual .auth-brand,
.auth-visual .auth-mobile-mark,
.auth-visual .auth-visual-copy h1,
.auth-visual .auth-visual-copy h1 em,
.auth-visual #auth-visual-copy {
  color: #f5f8ff;
}
.auth-visual .auth-visual-copy h1,
.auth-visual #auth-visual-copy,
.auth-visual .auth-brand {
  text-shadow: 0 1px 14px rgba(3, 10, 24, .45);
}