:root {
  color-scheme: dark;

  /* Warm, vibrant palette */
  --bg: #0e0a14;
  --bg-2: #140e1c;
  --panel: rgba(28, 20, 38, 0.72);
  --panel-solid: #1a1322;
  --panel-hi: rgba(255, 255, 255, 0.05);
  --text: #fbf7ff;
  --text-soft: #d7cce4;
  --muted: #9a8caa;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);

  /* Vibrant accents */
  --coral: #ff8a3d;
  --pink: #ff4d8d;
  --purple: #a855f7;
  --blue: #4f9cff;
  --teal: #2dd4bf;
  --gold: #ffc24b;

  --grad-warm: linear-gradient(135deg, #ff8a3d 0%, #ff4d8d 100%);
  --grad-warm-2: linear-gradient(135deg, #ff8a3d 0%, #ff4d8d 55%, #a855f7 100%);
  --grad-cool: linear-gradient(135deg, #4f9cff 0%, #a855f7 100%);
  --grad-done: linear-gradient(135deg, #2dd4bf 0%, #19c37d 100%);

  --shadow: 0 30px 90px rgba(0, 0, 0, 0.5);
  --glow-warm: 0 10px 30px rgba(255, 77, 141, 0.28);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-lg: 22px;
  --sidebar-width: 430px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}

html,
body {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 980px;
  color: var(--text);
  font-family:
    'Plus Jakarta Sans',
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
  letter-spacing: -0.01em;
}

button,
input,
select {
  font: inherit;
}
button {
  cursor: pointer;
}
h1,
h2,
h3,
p {
  margin: 0;
}

#app {
  position: relative;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(900px 600px at 8% -5%, rgba(255, 138, 61, 0.16), transparent 55%),
    radial-gradient(900px 700px at 100% 0%, rgba(168, 85, 247, 0.18), transparent 55%),
    radial-gradient(1000px 800px at 60% 110%, rgba(79, 156, 255, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 60%);
  transition: grid-template-columns 320ms var(--ease);
}

#app.resizing {
  transition: none;
  user-select: none;
}

/* ── Icons ───────────────────────────────────────────────────── */
.icon {
  display: block;
  width: 18px;
  height: 18px;
  background: currentColor;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
  flex-shrink: 0;
}
.icon-refresh {
  -webkit-mask-image: url('/icons/refresh-cw.svg');
  mask-image: url('/icons/refresh-cw.svg');
}
.icon-search {
  -webkit-mask-image: url('/icons/search.svg');
  mask-image: url('/icons/search.svg');
}
.icon-play {
  margin-left: 2px;
  -webkit-mask-image: url('/icons/play.svg');
  mask-image: url('/icons/play.svg');
}
.icon-pause {
  -webkit-mask-image: url('/icons/pause.svg');
  mask-image: url('/icons/pause.svg');
}
.icon-skip-back {
  -webkit-mask-image: url('/icons/skip-back.svg');
  mask-image: url('/icons/skip-back.svg');
}
.icon-skip-forward {
  -webkit-mask-image: url('/icons/skip-forward.svg');
  mask-image: url('/icons/skip-forward.svg');
}
.icon-rewind {
  -webkit-mask-image: url('/icons/rewind.svg');
  mask-image: url('/icons/rewind.svg');
}
.icon-fast-forward {
  -webkit-mask-image: url('/icons/fast-forward.svg');
  mask-image: url('/icons/fast-forward.svg');
}
.icon-volume-2 {
  -webkit-mask-image: url('/icons/volume-2.svg');
  mask-image: url('/icons/volume-2.svg');
}
.icon-volume-x {
  -webkit-mask-image: url('/icons/volume-x.svg');
  mask-image: url('/icons/volume-x.svg');
}
.icon-maximize {
  -webkit-mask-image: url('/icons/maximize.svg');
  mask-image: url('/icons/maximize.svg');
}
.icon-minimize {
  -webkit-mask-image: url('/icons/minimize.svg');
  mask-image: url('/icons/minimize.svg');
}
.icon-keyboard {
  -webkit-mask-image: url('/icons/keyboard.svg');
  mask-image: url('/icons/keyboard.svg');
}
.icon-sparkles {
  -webkit-mask-image: url('/icons/sparkles.svg');
  mask-image: url('/icons/sparkles.svg');
}
.icon-x {
  -webkit-mask-image: url('/icons/x.svg');
  mask-image: url('/icons/x.svg');
}
.icon-check-circle {
  -webkit-mask-image: url('/icons/check-circle.svg');
  mask-image: url('/icons/check-circle.svg');
}
.icon-info {
  -webkit-mask-image: url('/icons/info.svg');
  mask-image: url('/icons/info.svg');
}
.icon-alert-circle {
  -webkit-mask-image: url('/icons/alert-circle.svg');
  mask-image: url('/icons/alert-circle.svg');
}
.icon-panel-left {
  -webkit-mask-image: url('/icons/panel-left.svg');
  mask-image: url('/icons/panel-left.svg');
}
.icon-pip {
  -webkit-mask-image: url('/icons/picture-in-picture-2.svg');
  mask-image: url('/icons/picture-in-picture-2.svg');
}
.icon-sun {
  -webkit-mask-image: url('/icons/sun.svg');
  mask-image: url('/icons/sun.svg');
}
.icon-moon {
  -webkit-mask-image: url('/icons/moon.svg');
  mask-image: url('/icons/moon.svg');
}
.icon-folder {
  -webkit-mask-image: url('/icons/folder.svg');
  mask-image: url('/icons/folder.svg');
}
.icon-corner-left-up {
  -webkit-mask-image: url('/icons/corner-left-up.svg');
  mask-image: url('/icons/corner-left-up.svg');
}
.icon-chevron-right {
  -webkit-mask-image: url('/icons/chevron-right.svg');
  mask-image: url('/icons/chevron-right.svg');
}
.icon-hard-drive {
  -webkit-mask-image: url('/icons/hard-drive.svg');
  mask-image: url('/icons/hard-drive.svg');
}
.icon-music {
  -webkit-mask-image: url('/icons/music.svg');
  mask-image: url('/icons/music.svg');
}
.icon-file-text {
  -webkit-mask-image: url('/icons/file-text.svg');
  mask-image: url('/icons/file-text.svg');
}
.icon-rotate-ccw {
  -webkit-mask-image: url('/icons/rotate-ccw.svg');
  mask-image: url('/icons/rotate-ccw.svg');
}
.icon-dashboard {
  -webkit-mask-image: url('/icons/layout-dashboard.svg');
  mask-image: url('/icons/layout-dashboard.svg');
}
.icon-target {
  -webkit-mask-image: url('/icons/target.svg');
  mask-image: url('/icons/target.svg');
}
.icon-clock {
  -webkit-mask-image: url('/icons/clock.svg');
  mask-image: url('/icons/clock.svg');
}
.icon-award {
  -webkit-mask-image: url('/icons/award.svg');
  mask-image: url('/icons/award.svg');
}
.icon-plus {
  -webkit-mask-image: url('/icons/plus.svg');
  mask-image: url('/icons/plus.svg');
}
.icon-calendar {
  -webkit-mask-image: url('/icons/calendar.svg');
  mask-image: url('/icons/calendar.svg');
}
.icon-trash {
  -webkit-mask-image: url('/icons/trash-2.svg');
  mask-image: url('/icons/trash-2.svg');
}
.icon-zap {
  -webkit-mask-image: url('/icons/zap.svg');
  mask-image: url('/icons/zap.svg');
}
.icon-play-2 {
  -webkit-mask-image: url('/icons/play.svg');
  mask-image: url('/icons/play.svg');
}
.icon-history {
  -webkit-mask-image: url('/icons/history.svg');
  mask-image: url('/icons/history.svg');
}
.icon-flame {
  -webkit-mask-image: url('/icons/flame.svg');
  mask-image: url('/icons/flame.svg');
}
.icon-trending-up {
  -webkit-mask-image: url('/icons/trending-up.svg');
  mask-image: url('/icons/trending-up.svg');
}
.icon-circle-check {
  -webkit-mask-image: url('/icons/circle-check.svg');
  mask-image: url('/icons/circle-check.svg');
}
.icon-notebook {
  -webkit-mask-image: url('/icons/notebook-pen.svg');
  mask-image: url('/icons/notebook-pen.svg');
}
.icon-bookmark {
  -webkit-mask-image: url('/icons/bookmark.svg');
  mask-image: url('/icons/bookmark.svg');
}
.icon-download {
  -webkit-mask-image: url('/icons/download.svg');
  mask-image: url('/icons/download.svg');
}
.icon-captions {
  -webkit-mask-image: url('/icons/captions.svg');
  mask-image: url('/icons/captions.svg');
}
.icon-text-search {
  -webkit-mask-image: url('/icons/text-search.svg');
  mask-image: url('/icons/text-search.svg');
}
.icon-layers {
  -webkit-mask-image: url('/icons/layers.svg');
  mask-image: url('/icons/layers.svg');
}
.icon-brain {
  -webkit-mask-image: url('/icons/brain.svg');
  mask-image: url('/icons/brain.svg');
}
.icon-rotate-cw {
  -webkit-mask-image: url('/icons/rotate-cw.svg');
  mask-image: url('/icons/rotate-cw.svg');
}
.icon-settings {
  -webkit-mask-image: url('/icons/settings.svg');
  mask-image: url('/icons/settings.svg');
}
.icon-quiz {
  -webkit-mask-image: url('/icons/graduation-cap.svg');
  mask-image: url('/icons/graduation-cap.svg');
}
.icon-eye {
  -webkit-mask-image: url('/icons/eye.svg');
  mask-image: url('/icons/eye.svg');
}
.icon-eye-off {
  -webkit-mask-image: url('/icons/eye-off.svg');
  mask-image: url('/icons/eye-off.svg');
}
.icon-wand {
  -webkit-mask-image: url('/icons/wand-sparkles.svg');
  mask-image: url('/icons/wand-sparkles.svg');
}
.icon-upload {
  -webkit-mask-image: url('/icons/upload.svg');
  mask-image: url('/icons/upload.svg');
}
.icon-users {
  -webkit-mask-image: url('/icons/users.svg');
  mask-image: url('/icons/users.svg');
}

/* ── Sidebar ─────────────────────────────────────────────────── */
.sidebar {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(26, 19, 34, 0.78), rgba(18, 13, 24, 0.86));
  backdrop-filter: blur(22px);
  transition:
    opacity 220ms ease,
    border-color 320ms ease;
}

.sidebar-inner {
  display: grid;
  grid-template-rows: auto auto auto auto minmax(0, 1fr) auto;
  gap: 16px;
  height: 100%;
  min-height: 0;
  padding: 20px;
}

.sidebar-foot {
  padding-top: 4px;
  border-top: 1px solid var(--line);
}
.text-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  justify-content: center;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease;
}
.text-button:hover {
  background: rgba(255, 107, 95, 0.1);
  border-color: rgba(255, 107, 95, 0.3);
  color: var(--danger);
}
.text-button .icon {
  width: 14px;
  height: 14px;
}

.sidebar::-webkit-scrollbar,
.course-list::-webkit-scrollbar {
  width: 8px;
}
.course-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(var(--pink), var(--purple));
  background-clip: padding-box;
  border: 2px solid transparent;
}

/* ── Brand ───────────────────────────────────────────────────── */
.brand {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
}

.mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--grad-warm-2);
  color: #1a0f08;
  font-size: 15px;
  font-weight: 800;
  box-shadow: var(--glow-warm);
}

.brand-copy {
  min-width: 0;
}
.brand h1 {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.1;
}
.brand p {
  margin-top: 3px;
  overflow: hidden;
  color: var(--muted);
  font-size: 11.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-actions {
  display: flex;
  gap: 6px;
}

.ghost-button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    transform 140ms ease;
}
.ghost-button:hover {
  background: var(--panel-hi);
  border-color: var(--line-2);
  color: var(--text);
  transform: translateY(-1px);
}
.ghost-button .icon {
  width: 16px;
  height: 16px;
}

/* ── Hero progress ───────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(255, 138, 61, 0.12), transparent 60%),
    radial-gradient(120% 120% at 100% 100%, rgba(168, 85, 247, 0.14), transparent 60%),
    var(--panel-hi);
}

.hero-ring {
  position: relative;
  width: 104px;
  height: 104px;
}
.progress-ring {
  width: 104px;
  height: 104px;
  transform: rotate(-90deg);
}
.ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.09);
  stroke-width: 9;
}
.ring-fill {
  fill: none;
  stroke: url(#ringGrad);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
  transition: stroke-dashoffset 900ms var(--ease);
  filter: drop-shadow(0 0 6px rgba(255, 77, 141, 0.4));
}
.hero-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
}
.hero-center strong {
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  background: var(--grad-warm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-center span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-stats {
  display: grid;
  gap: 9px;
  min-width: 0;
}
.hero-stat {
  display: grid;
  grid-template-columns: 8px auto 1fr;
  gap: 8px;
  align-items: baseline;
}
.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  align-self: center;
}
.dot-videos {
  background: var(--blue);
  box-shadow: 0 0 8px rgba(79, 156, 255, 0.6);
}
.dot-progress {
  background: var(--gold);
  box-shadow: 0 0 8px rgba(255, 194, 75, 0.6);
}
.dot-done {
  background: var(--teal);
  box-shadow: 0 0 8px rgba(45, 212, 191, 0.6);
}
.hero-stat strong {
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}
.hero-stat > span:last-child {
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}

/* ── Toolbar / search ────────────────────────────────────────── */
.toolbar {
  display: grid;
  grid-template-columns: 1fr 46px;
  gap: 10px;
}

.search-wrap {
  position: relative;
}
.search-icon {
  position: absolute;
  top: 50%;
  left: 13px;
  transform: translateY(-50%);
  display: flex;
  color: var(--muted);
  pointer-events: none;
}
.search-wrap input {
  width: 100%;
  height: 46px;
  padding: 0 14px 0 38px;
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: none;
  background: var(--panel-hi);
  color: var(--text);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}
.search-wrap input::placeholder {
  color: #786a87;
}
.search-wrap input:focus {
  border-color: rgba(255, 77, 141, 0.6);
  box-shadow: 0 0 0 4px rgba(255, 77, 141, 0.14);
  background: rgba(255, 77, 141, 0.05);
}

.icon-button {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-hi);
  color: var(--text);
  transition:
    background 140ms ease,
    border-color 140ms ease,
    transform 120ms ease,
    box-shadow 140ms ease;
}
.icon-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 138, 61, 0.5);
  background: rgba(255, 138, 61, 0.12);
  box-shadow: 0 6px 18px rgba(255, 138, 61, 0.16);
}
.icon-button:active {
  transform: scale(0.95);
}
.icon-button.spinning .icon-refresh {
  animation: spin 700ms linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── Filter chips ────────────────────────────────────────────── */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.chip {
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-hi);
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 600;
  transition: all 160ms ease;
}
.chip:hover {
  border-color: var(--line-2);
  color: var(--text);
  transform: translateY(-1px);
}
.chip.active {
  border-color: transparent;
  background: var(--grad-warm);
  color: #1a0f08;
  font-weight: 700;
  box-shadow: var(--glow-warm);
}

/* ── Skeletons ───────────────────────────────────────────────── */
@keyframes shimmer {
  0% {
    background-position: -400px 0;
  }
  100% {
    background-position: 400px 0;
  }
}
.skeleton-list {
  display: grid;
  gap: 8px;
  padding: 4px 0;
}
.skeleton-item {
  height: 62px;
  border-radius: 14px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04) 25%,
    rgba(255, 255, 255, 0.09) 50%,
    rgba(255, 255, 255, 0.04) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite linear;
}
.skeleton-item:nth-child(2) {
  animation-delay: 0.15s;
}
.skeleton-item:nth-child(3) {
  animation-delay: 0.3s;
}

/* ── Course list ─────────────────────────────────────────────── */
.course-list {
  min-height: 0;
  overflow: auto;
  padding-right: 4px;
  scroll-behavior: smooth;
}

.curriculum-node {
  position: relative;
  margin-bottom: 7px;
  animation: nodeIn 240ms var(--ease) both;
}

.node-reset {
  position: absolute;
  top: 11px;
  right: 10px;
  display: none;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  background: rgba(26, 19, 34, 0.96);
  color: var(--muted);
  z-index: 3;
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    transform 120ms ease;
}
.node-reset .icon {
  width: 14px;
  height: 14px;
}
.node-reset:hover {
  background: rgba(255, 107, 95, 0.16);
  border-color: rgba(255, 107, 95, 0.5);
  color: var(--danger);
  transform: scale(1.06);
}
/* Reveal only for the directly-hovered folder row (avoids lighting up ancestors). */
.curriculum-node.has-progress > .curriculum-toggle:hover ~ .node-reset,
.curriculum-node.has-progress > .node-reset:hover {
  display: grid;
}
.curriculum-node.has-progress > .curriculum-toggle:hover .toggle-meta {
  opacity: 0;
}
.toggle-meta {
  transition: opacity 140ms ease;
}
@keyframes nodeIn {
  from {
    opacity: 0;
    transform: translateY(7px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.curriculum-toggle {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  min-height: 60px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
  color: var(--text);
  text-align: left;
  transition:
    background 200ms ease,
    border-color 200ms ease,
    transform 200ms var(--ease),
    box-shadow 200ms ease;
}
.curriculum-toggle:hover {
  transform: translateX(3px);
  border-color: var(--line-2);
}
.curriculum-node.selected > .curriculum-toggle {
  border-color: transparent;
  background: linear-gradient(
    135deg,
    rgba(255, 138, 61, 0.16),
    rgba(255, 77, 141, 0.14) 60%,
    rgba(168, 85, 247, 0.16)
  );
  box-shadow:
    inset 0 0 0 1px rgba(255, 77, 141, 0.28),
    0 8px 24px rgba(255, 77, 141, 0.12);
}

.toggle-copy {
  min-width: 0;
}
.toggle-copy strong {
  display: block;
  overflow: hidden;
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toggle-copy span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 11.5px;
}

.toggle-meta {
  display: grid;
  gap: 6px;
  justify-items: end;
}
.toggle-pct {
  font-size: 11px;
  font-weight: 800;
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
}
.mini-progress {
  display: block;
  width: 52px;
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}
.mini-progress span {
  display: block;
  height: 100%;
  width: var(--width);
  border-radius: inherit;
  background: var(--grad-warm-2);
  transition: width 600ms var(--ease);
}
.curriculum-node.is-complete .mini-progress span {
  background: var(--grad-done);
}

.curriculum-panel {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transform: translateY(-3px);
  transition:
    grid-template-rows 280ms var(--ease),
    opacity 200ms ease,
    transform 280ms var(--ease);
}
.curriculum-node.expanded > .curriculum-panel {
  grid-template-rows: 1fr;
  opacity: 1;
  transform: translateY(0);
}
.curriculum-node.collapsed > .curriculum-panel {
  pointer-events: none;
}
.curriculum-panel-inner {
  display: grid;
  gap: 3px;
  min-height: 0;
  overflow: hidden;
  margin-left: 13px;
  padding: 0 0 0 13px;
  border-left: 1.5px solid var(--line);
  transform: translateY(-4px);
  transition:
    padding 220ms ease,
    transform 280ms var(--ease);
}
.curriculum-node.expanded > .curriculum-panel .curriculum-panel-inner {
  padding: 6px 0 8px 13px;
  transform: translateY(0);
}
/* Brighten the guide line of the branch containing the active lesson */
.curriculum-node.selected > .curriculum-panel > .curriculum-panel-inner {
  border-left-color: rgba(255, 77, 141, 0.35);
}

/* ── Lesson button ───────────────────────────────────────────── */
.lesson-button {
  position: relative;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  width: 100%;
  min-height: 50px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--text);
  text-align: left;
  overflow: hidden;
  transition:
    background 150ms ease,
    border-color 150ms ease;
}
.lesson-button::before {
  content: '';
  position: absolute;
  left: 0;
  top: 22%;
  bottom: 22%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--grad-warm);
  opacity: 0;
  transition: opacity 160ms ease;
}
.lesson-button:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}
.lesson-button.active {
  border-color: rgba(255, 77, 141, 0.3);
  background: linear-gradient(135deg, rgba(255, 138, 61, 0.14), rgba(255, 77, 141, 0.1));
}
.lesson-button.active::before {
  opacity: 1;
}

.lesson-state {
  position: relative;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1.5px solid var(--line-2);
  border-radius: 50%;
  flex-shrink: 0;
  transition:
    border-color 200ms ease,
    background 200ms ease;
}
.lesson-state::before {
  content: '';
  width: 0;
  height: 0;
  margin-left: 2px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid var(--text-soft);
}
.lesson-state.watching {
  border-color: rgba(255, 194, 75, 0.7);
  background: rgba(255, 194, 75, 0.12);
}
.lesson-state.watching::before {
  border-left-color: var(--gold);
}
.lesson-state.done {
  border-color: transparent;
  background: var(--grad-done);
  box-shadow: 0 0 10px rgba(45, 212, 191, 0.4);
}
.lesson-state.done::before {
  width: 9px;
  height: 5px;
  margin: 0;
  border: 0;
  border-left: 2px solid #06231c;
  border-bottom: 2px solid #06231c;
  transform: rotate(-45deg);
}

.lesson-copy {
  min-width: 0;
}
.lesson-copy strong {
  display: block;
  overflow: hidden;
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 140ms ease;
}
.lesson-button.active .lesson-copy strong {
  color: var(--text);
}
.lesson-copy span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  text-transform: capitalize;
}
.lesson-percent {
  color: var(--coral);
  font-size: 11px;
  font-weight: 800;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.empty-state {
  padding: 24px 12px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

/* ── Resize handle ───────────────────────────────────────────── */
.resize-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 14px;
  transform: translateX(-7px);
  z-index: 40;
  display: grid;
  place-items: center;
  cursor: col-resize;
}
.resize-grip {
  width: 4px;
  height: 46px;
  border-radius: 999px;
  background: var(--line-2);
  transition:
    background 160ms ease,
    height 160ms ease,
    box-shadow 160ms ease;
}
.resize-handle:hover .resize-grip,
#app.resizing .resize-grip {
  height: 72px;
  background: var(--grad-warm);
  box-shadow: var(--glow-warm);
}
#app.sidebar-collapsed .resize-handle {
  display: none;
}

/* ── Sidebar collapse ────────────────────────────────────────── */
#app.sidebar-collapsed {
  grid-template-columns: 0px 1fr;
}
#app.sidebar-collapsed .sidebar {
  opacity: 0;
  pointer-events: none;
  border-right-color: transparent;
}

.sidebar-show {
  display: none;
  position: absolute;
  top: 32px;
  left: 22px;
  z-index: 30;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: rgba(26, 19, 34, 0.9);
  backdrop-filter: blur(10px);
  color: var(--text-soft);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  transition:
    background 140ms ease,
    color 140ms ease,
    transform 140ms ease;
}
.sidebar-show:hover {
  background: rgba(40, 29, 52, 0.98);
  color: var(--text);
  transform: scale(1.06);
}
.sidebar-show .icon {
  width: 17px;
  height: 17px;
}
#app.sidebar-collapsed .sidebar-show {
  display: grid;
}

/* ── Player workspace ────────────────────────────────────────── */
.player-workspace {
  position: relative;
  min-width: 0;
  height: 100vh;
  padding: 22px;
}

.player-stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0)), #0c0810;
  box-shadow: var(--shadow);
}

.player-meta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 82px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.04), transparent);
}
.player-meta-copy {
  min-width: 0;
}
.player-meta p {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.player-meta h2 {
  margin-top: 5px;
  overflow: hidden;
  font-size: clamp(18px, 2vw, 27px);
  font-weight: 800;
  line-height: 1.12;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.video-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: flex-end;
}

.meta-reset {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-hi);
  color: var(--muted);
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    transform 120ms ease;
}
.meta-reset[hidden] {
  display: none;
}
.meta-reset:hover {
  background: rgba(255, 107, 95, 0.14);
  border-color: rgba(255, 107, 95, 0.45);
  color: var(--danger);
  transform: translateY(-1px);
}
.meta-reset .icon {
  width: 16px;
  height: 16px;
}
#notesToggle {
  position: relative;
}
#notesToggle:hover {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.45);
  color: var(--coral);
}
.meta-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--grad-warm);
  color: #1a0f08;
  font-size: 10px;
  font-weight: 800;
  line-height: 1;
}
.meta-badge[hidden] {
  display: none;
}

/* ── Notes drawer ────────────────────────────────────────────── */
.notes-drawer {
  position: absolute;
  top: 22px;
  right: 22px;
  bottom: 22px;
  z-index: 25;
  width: 360px;
  max-width: calc(100% - 44px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #1b1422, #150f1d);
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.4);
  animation: drawerIn 240ms var(--ease);
}
.notes-drawer[hidden] {
  display: none;
}
@keyframes drawerIn {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
html[data-theme='light'] .notes-drawer {
  background: linear-gradient(180deg, #fff, #fdf6f2);
}

.notes-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.notes-head h3 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
}
.notes-head h3 .icon {
  width: 16px;
  height: 16px;
  color: var(--coral);
}
.notes-head-actions {
  display: flex;
  gap: 6px;
}

.notes-compose {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 10px;
}
#noteInput {
  width: 100%;
  resize: vertical;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font: inherit;
  font-size: 13px;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
#noteInput:focus {
  border-color: rgba(255, 77, 141, 0.55);
  box-shadow: 0 0 0 3px rgba(255, 77, 141, 0.14);
}
.notes-compose-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.note-at {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.notes-compose-btns {
  display: flex;
  gap: 8px;
}
.notes-compose-btns .pill-button .icon {
  width: 13px;
  height: 13px;
}
.notes-compose-btns .primary-button {
  padding: 8px 14px;
  font-size: 12.5px;
}

.notes-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 10px 12px;
  display: grid;
  gap: 8px;
  align-content: start;
}
.notes-empty {
  padding: 28px 10px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
}
.note-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: start;
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
}
.note-time {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255, 138, 61, 0.14);
  color: var(--coral);
  font-size: 11.5px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: background 130ms ease;
}
.note-time:hover {
  background: rgba(255, 138, 61, 0.26);
}
.note-time .icon {
  width: 12px;
  height: 12px;
}
.note-item.bookmark .note-time {
  background: rgba(168, 85, 247, 0.16);
  color: var(--purple);
}
.note-text {
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-soft);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.note-text:empty::before {
  content: 'Bookmark';
  color: var(--muted);
  font-style: italic;
}
.note-del {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  transition: all 130ms ease;
}
.note-del:hover {
  background: rgba(255, 107, 95, 0.14);
  color: var(--danger);
}
.note-del .icon {
  width: 13px;
  height: 13px;
}

@media (max-width: 720px) {
  .notes-drawer {
    width: auto;
    left: 22px;
  }
}

/* ── Transcript drawer ───────────────────────────────────────── */
.transcript-search {
  position: relative;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.transcript-search .search-icon {
  left: 28px;
}
.transcript-search input {
  width: 100%;
  height: 40px;
  padding: 0 13px 0 38px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font-size: 13px;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
.transcript-search input:focus {
  border-color: rgba(79, 156, 255, 0.55);
  box-shadow: 0 0 0 3px rgba(79, 156, 255, 0.14);
}

.transcript-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 8px 10px;
  display: grid;
  gap: 2px;
  align-content: start;
}
.cue-row {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 10px;
  align-items: start;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  transition:
    background 130ms ease,
    color 130ms ease;
}
.cue-row:hover {
  background: var(--panel-hi);
}
.cue-row .cue-t {
  color: var(--blue);
  font-size: 11.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding-top: 1px;
}
.cue-row .cue-text {
  font-size: 13px;
  line-height: 1.45;
}
.cue-row.active {
  background: rgba(79, 156, 255, 0.14);
  border-color: rgba(79, 156, 255, 0.3);
}
.cue-row.active .cue-text {
  color: var(--text);
}
.cue-row mark {
  background: rgba(255, 194, 75, 0.4);
  color: inherit;
  border-radius: 3px;
  padding: 0 1px;
}
.transcript-empty {
  padding: 28px 14px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.6;
}

#ccButton.cc-on {
  border-color: rgba(45, 212, 191, 0.5);
  background: rgba(45, 212, 191, 0.16);
  color: var(--teal);
}

/* ── Flashcards drawer ───────────────────────────────────────── */
.cards-compose {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 9px;
}
.cards-compose input[type='text'],
.cards-compose textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font: inherit;
  font-size: 13px;
  resize: vertical;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
.cards-compose input:focus,
.cards-compose textarea:focus {
  border-color: rgba(168, 85, 247, 0.55);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.14);
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.card-link input {
  width: 15px;
  height: 15px;
  accent-color: var(--purple);
}
.card-link span {
  color: var(--purple);
  font-variant-numeric: tabular-nums;
}
.card-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: start;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
}
.card-front {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}
.card-back {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
}
.card-due {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.card-due.now {
  color: var(--coral);
}
.card-jump {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 700;
  color: var(--purple);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}
.card-jump .icon {
  width: 11px;
  height: 11px;
}
.card-del {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  align-self: start;
  transition: all 130ms ease;
}
.card-del:hover {
  background: rgba(255, 107, 95, 0.14);
  color: var(--danger);
}
.card-del .icon {
  width: 13px;
  height: 13px;
}

/* ── Dashboard flashcards CTA ────────────────────────────────── */
.flash-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(168, 85, 247, 0.12), transparent 60%), var(--panel-hi);
}
.flash-cta-text strong {
  font-size: 20px;
  font-weight: 800;
}
.flash-cta-text span {
  color: var(--muted);
  font-size: 12.5px;
}
.flash-review-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 11px 20px;
  border: none;
  border-radius: 12px;
  background: var(--grad-cool);
  color: #0a0614;
  font-weight: 700;
  font-size: 13.5px;
  box-shadow: 0 8px 24px rgba(168, 85, 247, 0.32);
  transition:
    transform 120ms var(--ease),
    box-shadow 140ms ease,
    opacity 140ms;
}
.flash-review-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(168, 85, 247, 0.45);
}
.flash-review-btn:disabled {
  opacity: 0.45;
  cursor: default;
  box-shadow: none;
  transform: none;
}
.flash-review-btn .icon {
  width: 16px;
  height: 16px;
}

/* ── Review modal ────────────────────────────────────────────── */
.review-card {
  width: 560px;
  max-width: calc(100vw - 40px);
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #1d1527, #150f1d);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.7);
  animation: slideUp 220ms var(--ease);
}
html[data-theme='light'] .review-card {
  background: linear-gradient(180deg, #fff, #fdf6f2);
}
.review-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.review-progress {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.review-body {
  padding: 30px 26px;
  min-height: 200px;
  display: grid;
  align-content: center;
  gap: 16px;
  text-align: center;
}
.review-context {
  color: var(--purple);
  font-size: 12px;
  font-weight: 700;
}
.review-front {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
}
.review-divider {
  height: 1px;
  background: var(--line);
  margin: 2px 40px;
}
.review-back {
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-soft);
  white-space: pre-wrap;
}
.review-actions {
  padding: 16px 22px 22px;
}
.review-show {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px;
  font-size: 14px;
}
.review-show[hidden],
.review-grades[hidden] {
  display: none;
}
.kbd-hint {
  font-size: 10.5px;
  font-weight: 700;
  opacity: 0.6;
  border: 1px solid currentColor;
  border-radius: 5px;
  padding: 1px 5px;
}
.review-grades {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
}
.review-grades .grade {
  display: grid;
  gap: 2px;
  justify-items: center;
  padding: 12px 6px;
  border-radius: 11px;
  border: 1px solid var(--line-2);
  background: var(--panel-hi);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  transition:
    transform 120ms ease,
    background 140ms ease,
    border-color 140ms ease;
}
.review-grades .grade small {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--muted);
}
.review-grades .grade:hover {
  transform: translateY(-2px);
}
.grade.again:hover {
  border-color: rgba(255, 107, 95, 0.6);
  background: rgba(255, 107, 95, 0.14);
}
.grade.hard:hover {
  border-color: rgba(255, 194, 75, 0.6);
  background: rgba(255, 194, 75, 0.14);
}
.grade.good:hover {
  border-color: rgba(79, 156, 255, 0.6);
  background: rgba(79, 156, 255, 0.14);
}
.grade.easy:hover {
  border-color: rgba(45, 212, 191, 0.6);
  background: rgba(45, 212, 191, 0.14);
}
.review-done {
  padding: 40px 26px;
  text-align: center;
  display: grid;
  gap: 12px;
  justify-items: center;
}
.review-done .icon {
  width: 48px;
  height: 48px;
  color: var(--teal);
}
.review-done h3 {
  font-size: 20px;
  font-weight: 800;
}
.review-done p {
  color: var(--muted);
  font-size: 13.5px;
}

/* ── Settings ────────────────────────────────────────────────── */
.settings-body {
  padding: 18px 22px 8px;
  display: grid;
  gap: 8px;
}
.settings-body h4 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
}
.settings-body h4 .icon {
  width: 16px;
  height: 16px;
  color: var(--purple);
}
.settings-note {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
  margin-bottom: 6px;
}
.settings-hint {
  color: var(--muted);
  font-size: 12px;
}
.settings-hint b {
  color: var(--text-soft);
}
.settings-body select,
.settings-body input[type='text'],
.key-row input {
  height: 42px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font-size: 13.5px;
  width: 100%;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
.settings-body select:focus,
.settings-body input:focus,
.key-row input:focus {
  border-color: rgba(168, 85, 247, 0.55);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.14);
}
.key-row {
  display: grid;
  grid-template-columns: 1fr 42px;
  gap: 8px;
}
.key-row .ghost-button {
  width: 42px;
  height: 42px;
  border-radius: 11px;
}
.settings-divider {
  height: 1px;
  background: var(--line);
  margin: 16px 0 6px;
}
.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.toggle-row input {
  width: 17px;
  height: 17px;
  accent-color: var(--purple);
  cursor: pointer;
}
.settings-data-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.settings-data-btns .pill-button {
  padding: 10px 16px;
}
.settings-data-btns .pill-button .icon {
  width: 14px;
  height: 14px;
}

/* ── Quiz ────────────────────────────────────────────────────── */
.quiz-card {
  width: 600px;
}
.quiz-body-wrap {
  padding: 26px 26px 24px;
  min-height: 220px;
  display: grid;
  align-content: start;
  gap: 18px;
}
.quiz-loading,
.quiz-msg {
  padding: 30px 16px;
  text-align: center;
  display: grid;
  gap: 12px;
  justify-items: center;
}
.quiz-loading p {
  color: var(--muted);
  font-size: 13.5px;
}
.quiz-msg .icon-wand {
  width: 40px;
  height: 40px;
  color: var(--purple);
}
.quiz-msg h3 {
  font-size: 18px;
  font-weight: 800;
}
.quiz-msg p {
  color: var(--text-soft);
  font-size: 13.5px;
  line-height: 1.55;
  max-width: 44ch;
}
.quiz-hint {
  color: var(--muted) !important;
  font-size: 12px !important;
}
.quiz-q {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}
.quiz-options {
  display: grid;
  gap: 9px;
}
.quiz-opt {
  text-align: left;
  padding: 13px 15px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: var(--panel-hi);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  transition:
    background 130ms ease,
    border-color 130ms ease,
    transform 120ms ease;
}
.quiz-opt:hover:not(:disabled) {
  transform: translateX(2px);
  border-color: rgba(168, 85, 247, 0.5);
  background: rgba(168, 85, 247, 0.1);
}
.quiz-opt:disabled {
  cursor: default;
}
.quiz-opt.correct {
  border-color: transparent;
  background: var(--grad-done);
  color: #06231c;
  font-weight: 700;
}
.quiz-opt.wrong {
  border-color: rgba(255, 107, 95, 0.5);
  background: rgba(255, 107, 95, 0.16);
  color: #ffb9b2;
}
.quiz-feedback {
  font-size: 13px;
  line-height: 1.5;
  padding: 12px 14px;
  border-radius: 11px;
}
.quiz-feedback.good {
  background: rgba(45, 212, 191, 0.12);
  color: #9af0e0;
}
.quiz-feedback.bad {
  background: rgba(255, 194, 75, 0.12);
  color: var(--gold);
}
.quiz-feedback strong {
  font-weight: 800;
}
.quiz-next {
  justify-self: end;
}
.quiz-result {
  text-align: center;
  display: grid;
  gap: 14px;
  justify-items: center;
  padding: 14px 0;
}
.quiz-score {
  font-size: 40px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.quiz-score.good {
  color: var(--teal);
}
.quiz-score.mid {
  color: var(--gold);
}
.quiz-score.low {
  color: var(--danger);
}
.quiz-result p {
  color: var(--text-soft);
  font-size: 14px;
}
.quiz-result-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

/* clickable toast (e.g. "tap to quiz") */
.toast.clickable {
  cursor: pointer;
}
.toast.clickable:hover {
  border-color: rgba(255, 77, 141, 0.5);
}

/* Native caption text positioning a touch higher so it clears the controls */
video::cue {
  background: rgba(0, 0, 0, 0.75);
  font-size: 0.9em;
}
::cue {
  background: rgba(0, 0, 0, 0.78);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-hi);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.pill.good {
  border-color: transparent;
  background: var(--grad-done);
  color: #06231c;
}
.pill.warn {
  border-color: rgba(255, 194, 75, 0.5);
  background: rgba(255, 194, 75, 0.14);
  color: var(--gold);
}
.pill.bad {
  border-color: rgba(255, 107, 95, 0.5);
  background: rgba(255, 107, 95, 0.14);
  color: #ffb9b2;
}

/* ── Video frame ─────────────────────────────────────────────── */
.video-frame {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(168, 85, 247, 0.08), transparent 60%), #050308;
  cursor: none;
}
.video-frame.cursor-visible {
  cursor: default;
}
video {
  flex: 1 1 0;
  min-height: 0;
  width: 100%;
  display: block;
  object-fit: contain;
  background: #000;
}
video:focus {
  outline: none;
}

.player-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 12px;
  padding: 24px;
  text-align: center;
  background:
    radial-gradient(60% 60% at 50% 42%, rgba(255, 77, 141, 0.12), transparent 70%),
    linear-gradient(135deg, rgba(255, 138, 61, 0.08), rgba(168, 85, 247, 0.08)), #07040b;
  pointer-events: none;
  transition: opacity 320ms ease;
  color: #f5f0fb; /* video stage is always dark, keep text light in both themes */
}
.empty-icon {
  display: flex;
  justify-content: center;
}
.empty-icon .icon {
  width: 56px;
  height: 56px;
  background: var(--grad-warm-2);
  -webkit-mask-image: url('/icons/sparkles.svg');
  mask-image: url('/icons/sparkles.svg');
}
.player-empty strong {
  font-size: clamp(22px, 2.6vw, 36px);
  font-weight: 800;
}
.player-empty > span {
  color: rgba(245, 240, 251, 0.62);
  font-size: 14px;
}
.player-empty.hidden {
  opacity: 0;
}

/* ── Audio stage ─────────────────────────────────────────────── */
.audio-stage {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  text-align: center;
  background:
    radial-gradient(55% 55% at 50% 38%, rgba(255, 77, 141, 0.2), transparent 70%),
    linear-gradient(135deg, rgba(255, 138, 61, 0.1), rgba(168, 85, 247, 0.14)), #0a0610;
}
.video-frame.audio-mode .audio-stage {
  display: flex;
}

.audio-art {
  display: grid;
  place-items: center;
  width: 124px;
  height: 124px;
  border-radius: 30px;
  background: var(--grad-warm-2);
  box-shadow: 0 18px 44px rgba(255, 77, 141, 0.4);
}
.audio-art .icon {
  width: 58px;
  height: 58px;
  color: #1a0f08;
}

.audio-bars {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 30px;
}
.audio-bars span {
  width: 5px;
  height: 8px;
  border-radius: 3px;
  background: var(--grad-warm);
}
.video-frame.audio-mode.is-playing .audio-bars span {
  animation: eq 900ms ease-in-out infinite;
}
.audio-bars span:nth-child(1) {
  animation-delay: 0s;
}
.audio-bars span:nth-child(2) {
  animation-delay: 0.12s;
}
.audio-bars span:nth-child(3) {
  animation-delay: 0.24s;
}
.audio-bars span:nth-child(4) {
  animation-delay: 0.36s;
}
.audio-bars span:nth-child(5) {
  animation-delay: 0.18s;
}
.audio-bars span:nth-child(6) {
  animation-delay: 0.3s;
}
.audio-bars span:nth-child(7) {
  animation-delay: 0.06s;
}
@keyframes eq {
  0%,
  100% {
    height: 8px;
  }
  50% {
    height: 28px;
  }
}

.audio-title {
  max-width: min(70vw, 560px);
  overflow: hidden;
  font-size: 21px;
  font-weight: 800;
  color: #f7f2fc;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.audio-sub {
  color: rgba(245, 240, 251, 0.55);
  font-size: 13px;
  font-weight: 600;
}

/* ── PDF stage ───────────────────────────────────────────────── */
.pdf-stage {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: none;
  flex-direction: column;
  background: #20242b;
}
.video-frame.pdf-mode .pdf-stage {
  display: flex;
}
.video-frame.pdf-mode {
  cursor: default;
}
.video-frame.pdf-mode .controls-overlay {
  display: none;
}

#pdfFrame {
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
  border: 0;
  background: #525659;
}

.pdf-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: #0c0810;
  border-top: 1px solid var(--line);
}
.pdf-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 600;
}
.pdf-label .icon {
  width: 16px;
  height: 16px;
  color: var(--coral);
}
.pdf-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pdf-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    transform 120ms ease;
}
.pdf-tool-btn:hover {
  background: rgba(255, 255, 255, 0.13);
  color: var(--text);
  transform: translateY(-1px);
}
.pdf-tool-btn.primary {
  border-color: transparent;
  background: var(--grad-warm);
  color: #1a0f08;
  font-weight: 700;
  box-shadow: var(--glow-warm);
}
.pdf-tool-btn.primary:hover {
  box-shadow: 0 12px 28px rgba(255, 77, 141, 0.4);
}
.pdf-tool-btn.is-done {
  background: var(--grad-done);
  color: #06231c;
  border-color: transparent;
  box-shadow: none;
}

/* ── Source large-folder warning ─────────────────────────────── */
.source-warning {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: 12px;
  padding: 11px 13px;
  border: 1px solid rgba(255, 194, 75, 0.4);
  border-radius: 12px;
  background: rgba(255, 194, 75, 0.1);
  color: var(--gold);
  font-size: 12.5px;
  line-height: 1.5;
}
.source-warning[hidden] {
  display: none;
}
.source-warning .icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Confirm dialog ──────────────────────────────────────────── */
.modal-confirm {
  width: 400px;
}
.confirm-body {
  padding: 16px 22px 4px;
  color: var(--text-soft);
  font-size: 13.5px;
  line-height: 1.55;
}
.confirm-body strong {
  color: var(--text);
}
.confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 18px 22px 20px;
}
.ghost-pill {
  padding: 10px 18px;
  border: 1px solid var(--line-2);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  transition:
    background 140ms ease,
    color 140ms ease;
}
.ghost-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
}
.danger-button {
  padding: 10px 18px;
  border: none;
  border-radius: 11px;
  background: linear-gradient(135deg, #ff7a5c, #ff4d5e);
  color: #2a0a08;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 8px 22px rgba(255, 77, 94, 0.3);
  transition:
    transform 120ms var(--ease),
    box-shadow 140ms ease;
}
.danger-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(255, 77, 94, 0.42);
}
.danger-button:active {
  transform: scale(0.96);
}

/* ── Controls overlay ────────────────────────────────────────── */
.controls-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0 18px 16px;
  background: linear-gradient(
    to top,
    rgba(5, 3, 8, 0.88) 0%,
    rgba(5, 3, 8, 0.55) 55%,
    transparent 100%
  );
  opacity: 1;
  transition: opacity 280ms var(--ease);
  z-index: 10;
}
.player-stage.controls-hidden .controls-overlay {
  opacity: 0;
  pointer-events: none;
}

.seek-bar-wrap {
  margin-bottom: 11px;
}
.seek-track {
  position: relative;
  height: 22px;
  display: flex;
  align-items: center;
  cursor: pointer;
}
.seek-track::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  pointer-events: none;
}
.seek-buffer {
  position: absolute;
  left: 0;
  height: 5px;
  width: 0%;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.3);
  transition: width 400ms ease;
  pointer-events: none;
}
.seek-fill {
  position: absolute;
  left: 0;
  height: 5px;
  width: 0%;
  border-radius: 999px;
  background: var(--grad-warm);
  pointer-events: none;
  transition: width 80ms linear;
  box-shadow: 0 0 10px rgba(255, 77, 141, 0.5);
}
#seekSlider {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  margin: 0;
  z-index: 2;
}
.seek-track:hover .seek-fill,
.seek-track:hover .seek-buffer,
.seek-track:hover::before {
  height: 7px;
}

.seek-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);
  transform: translateX(-50%);
  padding: 5px 9px;
  border-radius: 8px;
  background: rgba(26, 19, 34, 0.96);
  border: 1px solid var(--line-2);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
  z-index: 20;
}
.seek-track:hover .seek-tooltip {
  opacity: 1;
}

.time-row {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.control-group {
  display: flex;
  align-items: center;
  gap: 7px;
}

.control-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.88);
  transition:
    background 140ms ease,
    border-color 140ms ease,
    transform 120ms ease,
    color 140ms ease;
}
.control-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 138, 61, 0.55);
  background: rgba(255, 138, 61, 0.16);
  color: var(--text);
}
.control-button:active {
  transform: scale(0.94);
}
.control-button:disabled {
  cursor: default;
  opacity: 0.3;
  transform: none;
}

.play-button {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 0;
  border-radius: 50%;
  background: var(--grad-warm);
  color: #1a0f08;
  box-shadow: 0 10px 28px rgba(255, 77, 141, 0.42);
  transition:
    transform 130ms var(--ease),
    box-shadow 130ms ease;
}
.play-button:hover {
  transform: scale(1.08);
  box-shadow: 0 14px 36px rgba(255, 77, 141, 0.55);
}
.play-button:active {
  transform: scale(0.93);
}
.play-button .icon {
  width: 22px;
  height: 22px;
}

.volume-group {
  display: flex;
  align-items: center;
  gap: 7px;
}
.volume-slider {
  width: 78px;
  height: 5px;
  cursor: pointer;
  border-radius: 999px;
  appearance: none;
  border: none;
  background: linear-gradient(90deg, var(--coral) var(--vol, 100%), rgba(255, 255, 255, 0.2) 0);
}
.volume-slider::-webkit-slider-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  appearance: none;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

select {
  height: 40px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.88);
  outline: none;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 140ms ease;
}
select:hover {
  border-color: rgba(255, 138, 61, 0.55);
}

/* ── Welcome / folder gate ───────────────────────────────────── */
.gate {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 600px at 15% 0%, rgba(255, 138, 61, 0.16), transparent 55%),
    radial-gradient(900px 700px at 100% 100%, rgba(168, 85, 247, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 60%);
}
.gate[hidden] {
  display: none;
}
.gate-card {
  width: 460px;
  max-width: calc(100vw - 40px);
  display: grid;
  gap: 14px;
  justify-items: center;
  text-align: center;
  padding: 40px 36px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(28, 20, 38, 0.7), rgba(18, 13, 24, 0.8));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  animation: slideUp 240ms var(--ease);
}
.gate-mark {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--grad-warm-2);
  color: #1a0f08;
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--glow-warm);
  margin-bottom: 4px;
}
.gate-card h2 {
  font-size: 22px;
  font-weight: 800;
}
.gate-card p {
  color: var(--text-soft);
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 36ch;
}
.gate-card p strong {
  color: var(--text);
}
.gate-hint {
  font-size: 12.5px;
  color: var(--muted);
}
.gate-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11.5px;
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}
.gate-btn {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.gate-btn .icon {
  width: 16px;
  height: 16px;
}
.gate-link {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
}
.gate-link:hover {
  color: var(--text);
}
.gate-spinner {
  width: 34px;
  height: 34px;
  margin-top: 8px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--pink);
  animation: spin 800ms linear infinite;
}

/* ── Dashboard ───────────────────────────────────────────────── */
.dashboard {
  height: 100%;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0)), #0c0810;
  box-shadow: var(--shadow);
}
.player-workspace.dashboard-view .player-stage {
  display: none;
}
.player-workspace:not(.dashboard-view) .dashboard {
  display: none;
}
html[data-theme='light'] .dashboard {
  background: linear-gradient(180deg, rgba(60, 30, 70, 0.02), transparent), #fff;
}

.dash-scroll {
  height: 100%;
  overflow: auto;
  padding: 26px 30px 36px;
  display: grid;
  gap: 26px;
  align-content: start;
  scroll-behavior: smooth;
}
.dash-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.dash-greeting {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.dash-title {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  margin-top: 4px;
}

/* Stat tiles */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}
.stat-tile {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-hi);
  position: relative;
  overflow: hidden;
}
.stat-tile .tile-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
}
.stat-tile .tile-icon .icon {
  width: 18px;
  height: 18px;
}
.tile-today .tile-icon {
  background: rgba(79, 156, 255, 0.16);
  color: var(--blue);
}
.tile-week .tile-icon {
  background: rgba(168, 85, 247, 0.16);
  color: var(--purple);
}
.tile-streak .tile-icon {
  background: rgba(255, 138, 61, 0.16);
  color: var(--coral);
}
.tile-life .tile-icon {
  background: rgba(45, 212, 191, 0.16);
  color: var(--teal);
}
.tile-remaining .tile-icon {
  background: rgba(255, 194, 75, 0.16);
  color: var(--gold);
}
.tile-done .tile-icon {
  background: rgba(255, 77, 141, 0.16);
  color: var(--pink);
}
.stat-tile strong {
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat-tile span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

/* Sections */
.dash-section {
  display: grid;
  gap: 14px;
}
.dash-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.dash-section-head h3 {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 800;
}
.dash-section-head h3 .icon {
  width: 17px;
  height: 17px;
  color: var(--coral);
}
.dash-sub {
  color: var(--muted);
  font-size: 12px;
}
.pill-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--panel-hi);
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 700;
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease,
    transform 120ms ease;
}
.pill-button:hover {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.5);
  color: var(--text);
  transform: translateY(-1px);
}
.pill-button .icon {
  width: 14px;
  height: 14px;
}

/* Continue watching */
.continue-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 1fr);
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.continue-card {
  text-align: left;
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-hi);
  color: var(--text);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}
.continue-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 77, 141, 0.35);
  background: rgba(255, 77, 141, 0.06);
}
.continue-card .cc-course {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.continue-card .cc-title {
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.3;
  max-height: 2.6em;
  overflow: hidden;
}
.continue-card .cc-bar {
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}
.continue-card .cc-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--grad-warm);
}
.continue-card .cc-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
}
.continue-card .cc-resume {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--coral);
}
.continue-card .cc-resume .icon {
  width: 13px;
  height: 13px;
}

/* Goals */
.goals-list {
  display: grid;
  gap: 12px;
}
.goal-card {
  display: grid;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-hi);
}
.goal-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.goal-name {
  font-size: 15px;
  font-weight: 800;
}
.goal-meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}
.goal-del {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  transition: all 140ms ease;
  flex-shrink: 0;
}
.goal-del:hover {
  color: var(--danger);
  border-color: rgba(255, 107, 95, 0.5);
  background: rgba(255, 107, 95, 0.1);
}
.goal-del .icon {
  width: 14px;
  height: 14px;
}
.goal-bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}
.goal-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--grad-warm-2);
  transition: width 600ms var(--ease);
}
.goal-card.is-complete .goal-bar span {
  background: var(--grad-done);
}
.goal-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.goal-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-soft);
}
.goal-chip .icon {
  width: 13px;
  height: 13px;
}
.goal-chip.ontrack {
  border-color: rgba(45, 212, 191, 0.4);
  background: rgba(45, 212, 191, 0.12);
  color: #9af0e0;
}
.goal-chip.behind {
  border-color: rgba(255, 194, 75, 0.45);
  background: rgba(255, 194, 75, 0.13);
  color: var(--gold);
}
.goal-chip.done {
  border-color: transparent;
  background: var(--grad-done);
  color: #06231c;
}
.goals-empty {
  padding: 22px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  border: 1px dashed var(--line-2);
  border-radius: var(--radius);
}

/* Heatmap */
.heatmap-wrap {
  overflow-x: auto;
  padding-bottom: 4px;
}
.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 13px);
  gap: 3px;
  width: max-content;
}
.hm-cell {
  width: 13px;
  height: 13px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
}
html[data-theme='light'] .hm-cell {
  background: rgba(60, 30, 70, 0.06);
}
.hm-cell.l1 {
  background: rgba(255, 138, 61, 0.35);
}
.hm-cell.l2 {
  background: rgba(255, 120, 80, 0.55);
}
.hm-cell.l3 {
  background: rgba(255, 90, 110, 0.75);
}
.hm-cell.l4 {
  background: var(--pink);
  box-shadow: 0 0 6px rgba(255, 77, 141, 0.5);
}
.hm-cell.future {
  background: transparent;
}

/* Achievements */
.badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}
.badge {
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
  padding: 16px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-hi);
  transition:
    transform 160ms ease,
    border-color 160ms ease;
}
.badge.earned {
  border-color: rgba(255, 194, 75, 0.4);
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(255, 194, 75, 0.12), transparent 70%), var(--panel-hi);
}
.badge.earned:hover {
  transform: translateY(-2px);
}
.badge .badge-ic {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
}
.badge.earned .badge-ic {
  background: var(--grad-warm-2);
  color: #1a0f08;
  box-shadow: var(--glow-warm);
}
.badge .badge-ic .icon {
  width: 22px;
  height: 22px;
}
.badge strong {
  font-size: 12.5px;
  font-weight: 700;
}
.badge span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}
.badge:not(.earned) {
  opacity: 0.6;
}

/* Goal form */
.goal-form {
  padding: 18px 22px 6px;
  display: grid;
  gap: 8px;
}
.field-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-soft);
  margin-top: 8px;
}
.field-opt {
  color: var(--muted);
  font-weight: 500;
}
.goal-form input[type='text'],
.goal-form input[type='date'],
.goal-form input[type='number'] {
  height: 42px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font-size: 13.5px;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
.goal-form input:focus {
  border-color: rgba(255, 77, 141, 0.55);
  box-shadow: 0 0 0 3px rgba(255, 77, 141, 0.14);
}
.goal-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.goal-row > div {
  display: grid;
  gap: 6px;
}
.course-picker {
  display: grid;
  gap: 6px;
  max-height: 220px;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.12);
}
.course-opt {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 11px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 130ms ease;
}
.course-opt:hover {
  background: var(--panel-hi);
}
.course-opt input {
  width: 17px;
  height: 17px;
  accent-color: var(--pink);
  cursor: pointer;
}
.course-opt .co-name {
  font-size: 13px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.course-opt .co-meta {
  margin-left: auto;
  color: var(--muted);
  font-size: 11.5px;
  flex-shrink: 0;
}

/* ── Modal ───────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 5, 12, 0.72);
  backdrop-filter: blur(8px);
  animation: fadeIn 180ms ease;
}
.modal-backdrop[hidden] {
  display: none;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal {
  width: 440px;
  max-width: calc(100vw - 40px);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #1d1527, #150f1d);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.7);
  animation: slideUp 220ms var(--ease);
}
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 15px;
  border-bottom: 1px solid var(--line);
}
.modal-header h3 {
  font-size: 16px;
  font-weight: 800;
}
.modal-close {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 9px;
  background: var(--panel-hi);
  color: var(--muted);
  transition:
    background 140ms ease,
    color 140ms ease;
}
.modal-close:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
}

.shortcuts-grid {
  padding: 18px 22px 22px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px 22px;
}
.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-soft);
}
kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 25px;
  padding: 0 8px;
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  border-radius: 7px;
  background: var(--panel-hi);
  color: var(--text);
  font:
    700 12px/1 ui-monospace,
    'SFMono-Regular',
    'Cascadia Mono',
    monospace;
}

/* ── Source folder picker ────────────────────────────────────── */
.modal-wide {
  width: 580px;
}

.source-browser {
  padding: 16px 20px 4px;
}
.source-intro {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
  margin-bottom: 14px;
}
.source-intro strong {
  color: var(--text-soft);
}

.path-bar {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 8px;
  margin-bottom: 12px;
}
.path-up {
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-hi);
  color: var(--text-soft);
  transition:
    background 140ms ease,
    color 140ms ease,
    border-color 140ms ease;
}
.path-up:hover:not(:disabled) {
  background: rgba(255, 138, 61, 0.12);
  border-color: rgba(255, 138, 61, 0.5);
  color: var(--text);
}
.path-up:disabled {
  opacity: 0.35;
  cursor: default;
}
.path-up .icon {
  width: 17px;
  height: 17px;
}

#sourcePathInput {
  width: 100%;
  height: 40px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-hi);
  color: var(--text);
  outline: none;
  font:
    500 12.5px/1 ui-monospace,
    'SFMono-Regular',
    'Cascadia Mono',
    monospace;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
#sourcePathInput:focus {
  border-color: rgba(255, 77, 141, 0.55);
  box-shadow: 0 0 0 3px rgba(255, 77, 141, 0.14);
}

.path-go {
  padding: 0 16px;
  height: 40px;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: var(--panel-hi);
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
  transition:
    background 140ms ease,
    border-color 140ms ease;
}
.path-go:hover {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.5);
}

.dir-list {
  display: grid;
  gap: 3px;
  max-height: 320px;
  min-height: 120px;
  overflow: auto;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.12);
}
.dir-row {
  display: grid;
  grid-template-columns: 20px 1fr 16px;
  gap: 11px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  text-align: left;
  transition:
    background 130ms ease,
    border-color 130ms ease,
    transform 130ms ease;
}
.dir-row:hover {
  background: var(--panel-hi);
  border-color: var(--line);
  transform: translateX(2px);
}
.dir-row .icon-folder {
  color: var(--gold);
  width: 18px;
  height: 18px;
}
.dir-row .dir-chevron {
  color: var(--muted);
  width: 16px;
  height: 16px;
}
.dir-name {
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.source-hint {
  padding: 22px 12px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 20px;
  margin-top: 14px;
  border-top: 1px solid var(--line);
}
.source-current {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-soft);
  font:
    500 12px/1.3 ui-monospace,
    'SFMono-Regular',
    'Cascadia Mono',
    monospace;
}

.primary-button {
  flex-shrink: 0;
  padding: 11px 20px;
  border: none;
  border-radius: 12px;
  background: var(--grad-warm);
  color: #1a0f08;
  font-weight: 700;
  font-size: 13.5px;
  box-shadow: var(--glow-warm);
  transition:
    transform 120ms var(--ease),
    box-shadow 140ms ease,
    opacity 140ms ease;
}
.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(255, 77, 141, 0.45);
}
.primary-button:active {
  transform: scale(0.96);
}
.primary-button:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.empty-state .primary-button {
  margin-top: 14px;
}
.empty-state p {
  margin: 0 0 4px;
}

/* ── Toasts ──────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 9px;
  align-items: flex-end;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 16px;
  max-width: 340px;
  border-radius: 14px;
  border: 1px solid var(--line-2);
  background: linear-gradient(135deg, rgba(29, 21, 39, 0.97), rgba(21, 15, 29, 0.97));
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  pointer-events: auto;
  animation: toastIn 320ms var(--ease);
}
.toast.dismissing {
  animation: toastOut 250ms ease forwards;
}
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(5px) scale(0.96);
  }
}
.toast .icon {
  flex-shrink: 0;
}
.toast.success .icon {
  color: var(--teal);
}
.toast.info .icon {
  color: var(--blue);
}
.toast.warn .icon {
  color: var(--gold);
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1040px) {
  body {
    min-width: 0;
  }
  #app {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 100vh;
    overflow: visible;
  }
  .sidebar {
    height: auto;
    max-height: 50vh;
  }
  .resize-handle {
    display: none;
  }
  .player-workspace {
    height: 74vh;
    min-height: 620px;
  }
}
@media (max-width: 720px) {
  .player-meta,
  .control-row {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }
  .video-stats {
    justify-content: flex-start;
  }
  .shortcuts-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Light theme ─────────────────────────────────────────────── */
html[data-theme='light'] {
  color-scheme: light;
  --bg: #f7efe9;
  --bg-2: #fffaf6;
  --panel: rgba(255, 255, 255, 0.7);
  --panel-solid: #ffffff;
  --panel-hi: rgba(60, 30, 70, 0.045);
  --text: #2a1d30;
  --text-soft: #574860;
  --muted: #8a7b91;
  --line: rgba(60, 30, 70, 0.1);
  --line-2: rgba(60, 30, 70, 0.17);
  --shadow: 0 24px 70px rgba(150, 80, 110, 0.16);
}
html[data-theme='light'] #app {
  background:
    radial-gradient(900px 600px at 8% -5%, rgba(255, 138, 61, 0.14), transparent 55%),
    radial-gradient(900px 700px at 100% 0%, rgba(168, 85, 247, 0.12), transparent 55%),
    radial-gradient(1000px 800px at 60% 110%, rgba(79, 156, 255, 0.09), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 60%);
}
html[data-theme='light'] .sidebar {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 250, 246, 0.84));
}
html[data-theme='light'] .player-stage {
  background: linear-gradient(180deg, rgba(60, 30, 70, 0.02), transparent), #ffffff;
}
html[data-theme='light'] .curriculum-toggle {
  background: linear-gradient(135deg, rgba(60, 30, 70, 0.045), rgba(60, 30, 70, 0.02));
}
html[data-theme='light'] .lesson-button:hover {
  background: rgba(60, 30, 70, 0.05);
}
html[data-theme='light'] .mini-progress {
  background: rgba(60, 30, 70, 0.12);
}
html[data-theme='light'] .ring-bg {
  stroke: rgba(60, 30, 70, 0.1);
}
html[data-theme='light'] .skeleton-item {
  background: linear-gradient(
    90deg,
    rgba(60, 30, 70, 0.05) 25%,
    rgba(60, 30, 70, 0.1) 50%,
    rgba(60, 30, 70, 0.05) 75%
  );
  background-size: 800px 100%;
}
html[data-theme='light'] .modal {
  background: linear-gradient(180deg, #ffffff, #fdf6f2);
}
html[data-theme='light'] .sidebar-show {
  background: rgba(255, 255, 255, 0.92);
}
html[data-theme='light'] .toast {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(253, 246, 242, 0.97));
}

/* ── Fullscreen ──────────────────────────────────────────────── */
:fullscreen .player-stage {
  border-radius: 0;
}
:fullscreen video {
  max-height: 100vh;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Account / user avatar ─────────────────────────────────────────────────── */
.user-button {
  padding: 3px;
}
.user-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #ff8a3d, #ff4d8d 55%, #a855f7);
  background-size: cover;
  background-position: center;
  text-transform: uppercase;
}
.account-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.account-id {
  display: flex;
  align-items: center;
  gap: 14px;
}
.account-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #ff8a3d, #ff4d8d 55%, #a855f7);
  background-size: cover;
  background-position: center;
  text-transform: uppercase;
}
.account-id-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.account-id-text strong {
  font-size: 15px;
}
.account-email {
  color: var(--muted);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.account-role {
  margin-left: auto;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-soft);
}
.account-role.admin {
  background: rgba(168, 85, 247, 0.18);
  color: #d8b4fe;
}
.admin-open {
  width: 100%;
  justify-content: center;
}
.danger-button {
  background: #e1473d;
}
.danger-button:hover {
  background: #c93b32;
}

/* ── Admin: user list ──────────────────────────────────────────────────────── */
.admin-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 70vh;
}
.admin-add {
  display: flex;
  gap: 8px;
}
.admin-add input {
  flex: 1;
}
.admin-add select {
  flex: 0 0 auto;
}
.admin-user-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}
.admin-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-hi);
}
.admin-user.is-disabled {
  opacity: 0.55;
}
.admin-user-main {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}
.admin-user-email {
  font-weight: 600;
  font-size: 13.5px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.admin-user-meta {
  font-size: 11.5px;
  color: var(--muted);
}
.admin-user-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.admin-act {
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--panel-solid);
  color: var(--text-soft);
}
.admin-act:hover {
  color: var(--text);
  border-color: var(--muted);
}
.admin-act.danger {
  color: #e9897f;
}
.admin-act.danger:hover {
  background: rgba(225, 71, 61, 0.12);
  border-color: #e1473d;
}
.admin-empty,
.admin-loading {
  padding: 22px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.admin-loading {
  display: flex;
  justify-content: center;
}

/* ── Sign-in gate ──────────────────────────────────────────────────────────── */
.google-btn {
  text-decoration: none;
}
.g-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  color: #4285f4;
  font-weight: 800;
  font-size: 12px;
}
.gate-error {
  color: #f0a;
  color: #ff9bb3;
  font-size: 13px;
}
.gate-dev {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.gate-dev input {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-hi);
  color: var(--text);
  font-size: 12.5px;
}