:root {
  --bg: #f6f6f8;
  --bg-elev: #ffffff;
  --bg-soft: #eeeef2;
  --line: #e2e2e8;
  --text: #16171c;
  --text-2: #5b5e6b;
  --text-3: #8b8e9a;
  --accent: #ff4f73;
  --accent-soft: rgba(255, 79, 115, 0.12);
  --ori: #ff4f73;
  --ori-soft: rgba(255, 79, 115, 0.12);
  --kar: #14b8a6;
  --kar-soft: rgba(20, 184, 166, 0.14);
  --warn: #d97706;
  --warn-soft: rgba(217, 119, 6, 0.12);
  --danger: #e11d48;
  --shadow: 0 1px 2px rgba(16, 17, 22, 0.04), 0 8px 24px rgba(16, 17, 22, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --bg-elev: #171a21;
    --bg-soft: #1f232c;
    --line: #2a2f3a;
    --text: #f1f2f5;
    --text-2: #a5a9b6;
    --text-3: #6f7482;
    --accent-soft: rgba(255, 79, 115, 0.16);
    --ori-soft: rgba(255, 79, 115, 0.16);
    --kar: #2dd4bf;
    --kar-soft: rgba(45, 212, 191, 0.15);
    --warn: #f59e0b;
    --warn-soft: rgba(245, 158, 11, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-soft: #1f232c;
  --line: #2a2f3a;
  --text: #f1f2f5;
  --text-2: #a5a9b6;
  --text-3: #6f7482;
  --accent-soft: rgba(255, 79, 115, 0.16);
  --ori-soft: rgba(255, 79, 115, 0.16);
  --kar: #2dd4bf;
  --kar-soft: rgba(45, 212, 191, 0.15);
  --warn: #f59e0b;
  --warn-soft: rgba(245, 158, 11, 0.14);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Noto Sans SC", "Noto Sans Thai", system-ui, -apple-system, "PingFang SC", sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--ori), #ff8a5c);
  display: grid;
  place-items: center;
  color: #fff;
  flex: none;
}

.brand-mark svg { width: 17px; height: 17px; }

.spacer { flex: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, transform 0.08s, color 0.15s;
  text-decoration: none;
}

.btn:hover { background: var(--bg-soft); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }

.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { background: var(--bg-soft); }

.btn-danger { color: var(--danger); }
.btn-danger.confirm { background: var(--danger); color: #fff; border-color: transparent; }

.btn-icon { width: 40px; padding: 0; }
.btn-sm { height: 32px; padding: 0 10px; border-radius: 9px; font-size: 13px; }

.kbd {
  display: inline-block;
  min-width: 20px;
  padding: 0 5px;
  border-radius: 5px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  font-size: 11px;
  line-height: 18px;
  text-align: center;
  color: var(--text-3);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--bg-elev);
}

.btn-primary .kbd { color: rgba(255,255,255,0.85); border-color: rgba(255,255,255,0.35); background: transparent; }

.hero {
  padding: 40px 0 24px;
}

.hero h1 {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.hero p { margin: 0; color: var(--text-2); max-width: 640px; }

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin: 8px 0 20px;
}

.search {
  position: relative;
  flex: 1 1 260px;
  min-width: 0;
}

.search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  color: var(--text-3);
}

.input, .select, .textarea {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.textarea { height: auto; min-height: 72px; padding: 10px 12px; resize: vertical; }

.search .input { padding-left: 38px; }

.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.chips { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
}

.chip.on { background: var(--text); color: var(--bg); border-color: var(--text); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.thumbs {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
  overflow: hidden;
}

.thumbs img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumbs .thumb-k {
  inset: auto 10px 10px auto;
  width: 34%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  box-shadow: 0 0 0 2px var(--bg-elev), 0 6px 16px rgba(0,0,0,0.3);
}

.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; }
.card-title { font-weight: 600; font-size: 16px; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.card-sub { color: var(--text-2); font-size: 13px; }
.card-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--bg-soft);
  color: var(--text-2);
}

.tag.ok { background: var(--kar-soft); color: var(--kar); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }

.empty {
  text-align: center;
  padding: 64px 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

.empty h3 { margin: 12px 0 6px; font-size: 18px; }
.empty p { margin: 0 auto 20px; color: var(--text-2); max-width: 420px; }
.empty-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.empty-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
}
.empty-icon svg { width: 28px; height: 28px; }

.modal-back {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(8, 9, 12, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fade 0.15s ease-out;
}

.modal {
  width: min(560px, 100%);
  max-height: calc(100vh - 32px);
  overflow: auto;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.35);
  animation: pop 0.18s ease-out;
}

.modal-head { display: flex; align-items: center; padding: 18px 20px 4px; }
.modal-head h2 { margin: 0; font-size: 19px; flex: 1; }
.modal-body { padding: 12px 20px 8px; display: grid; gap: 14px; }
.modal-foot { display: flex; gap: 10px; padding: 14px 20px 20px; align-items: center; flex-wrap: wrap; }

.field { display: grid; gap: 6px; }
.field label { font-size: 13px; font-weight: 500; color: var(--text-2); display: flex; align-items: center; gap: 6px; }
.field .dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.o { background: var(--ori); }
.dot.k { background: var(--kar); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.hint { font-size: 12.5px; color: var(--text-3); min-height: 18px; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.hint.ok { color: var(--kar); }
.hint.err { color: var(--danger); }
.hint.warn { color: var(--warn); }
.hint a { color: inherit; }

.link-preview {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px;
  border-radius: 12px;
  background: var(--bg-soft);
}
.link-preview img { width: 84px; aspect-ratio: 16/9; object-fit: cover; border-radius: 8px; flex: none; }
.link-preview div { font-size: 13px; line-height: 1.4; min-width: 0; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

.song-head {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}
.song-head .titles { min-width: 0; }
.song-head .t { font-weight: 650; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.song-head .s { font-size: 12.5px; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

.pane {
  position: relative;
  border-radius: var(--radius);
  background: var(--bg-elev);
  border: 1.5px solid var(--line);
  padding: 10px;
  transition: border-color 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.pane.o.active { border-color: var(--ori); box-shadow: 0 0 0 4px var(--ori-soft); }
.pane.k.active { border-color: var(--kar); box-shadow: 0 0 0 4px var(--kar-soft); }
.pane:not(.active) .video { opacity: 0.55; }
.pane.guide-on.o:not(.active) .video { opacity: 0.8; }

.pane-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 4px 10px;
  font-size: 14px;
}

.pane-name { font-weight: 600; display: flex; align-items: center; gap: 8px; cursor: pointer; background: none; border: 0; padding: 0; }
.pane-name .dot { width: 10px; height: 10px; border-radius: 50%; }
.pane-state { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--bg-soft); color: var(--text-3); }
.pane.o.active .pane-state { background: var(--ori-soft); color: var(--ori); }
.pane.k.active .pane-state { background: var(--kar-soft); color: var(--kar); }
.pane-time { margin-left: auto; font-variant-numeric: tabular-nums; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; color: var(--text-2); }

.video {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  transition: opacity 0.2s;
}

.video iframe, .video > div { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.video-error {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 16px;
  background: rgba(10, 10, 14, 0.92);
  color: #f3f3f6;
  font-size: 14px;
  z-index: 2;
}
.video-error .btn { margin-top: 10px; background: #fff; color: #111; border-color: transparent; }

.console {
  margin-top: 16px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: grid;
  gap: 14px;
}

.timeline { display: flex; align-items: center; gap: 12px; }
.timeline .tnum { font-variant-numeric: tabular-nums; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; color: var(--text-2); min-width: 44px; }
.timeline .tnum:last-child { text-align: right; }

.range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--track-fill, var(--accent)) var(--p, 0%), var(--bg-soft) var(--p, 0%));
  outline: none;
  cursor: pointer;
}
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 2px solid var(--track-fill, var(--accent)); box-shadow: 0 1px 4px rgba(0,0,0,0.25); }
.range::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 2px solid var(--track-fill, var(--accent)); }

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ctl-main { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.play-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 0;
  background: var(--text);
  color: var(--bg);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.08s;
  flex: none;
}
.play-btn:active { transform: scale(0.94); }
.play-btn svg { width: 24px; height: 24px; }

.switch {
  display: inline-flex;
  padding: 4px;
  border-radius: 14px;
  background: var(--bg-soft);
  gap: 4px;
}
.switch button {
  height: 40px;
  padding: 0 16px;
  border-radius: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s, color 0.15s;
}
.switch button.on.o { background: var(--ori); color: #fff; }
.switch button.on.k { background: var(--kar); color: #fff; }

.btn-replay { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.btn-replay.live { background: var(--accent); color: #fff; }
.btn-replay.live .kbd { color: rgba(255,255,255,0.85); border-color: rgba(255,255,255,0.35); background: transparent; }

.ctl-side { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-left: auto; }

.guide {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.guide label { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 500; white-space: nowrap; }
.guide .range { width: 90px; --track-fill: var(--ori); }

.toggle { position: relative; width: 34px; height: 20px; flex: none; }
.toggle input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.toggle span { position: absolute; inset: 0; border-radius: 999px; background: var(--line); transition: background 0.15s; pointer-events: none; }
.toggle span::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform 0.15s; box-shadow: 0 1px 3px rgba(0,0,0,0.25); }
.toggle input:checked + span { background: var(--ori); }
.toggle input:checked + span::after { transform: translateX(14px); }

.select-sm { height: 40px; width: auto; padding: 0 10px; border-radius: 12px; }

.banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
}
.banner[hidden] { display: none; }

.panels { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; margin-top: 16px; }

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.panel h3 { margin: 0 0 4px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.panel > p { margin: 0 0 14px; color: var(--text-2); font-size: 13.5px; }

.offset-read {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--bg-soft);
  margin-bottom: 12px;
}
.offset-read b { font-size: 22px; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.offset-read span { color: var(--text-2); font-size: 13px; }

.nudges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; align-items: center; }
.nudges .lbl { font-size: 13px; color: var(--text-2); margin-right: 4px; }

.marks { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.mark-btn { height: auto; min-height: 56px; flex-direction: column; gap: 2px; padding: 8px 12px; align-items: flex-start; }
.mark-btn small { color: var(--text-3); font-weight: 400; font-size: 12px; font-variant-numeric: tabular-nums; }
.mark-btn.o.got { border-color: var(--ori); background: var(--ori-soft); }
.mark-btn.k.got { border-color: var(--kar); background: var(--kar-soft); }

.anchors { display: grid; gap: 6px; }
.anchor {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--bg-soft);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.anchor .a-o { color: var(--ori); font-weight: 600; }
.anchor .a-k { color: var(--kar); font-weight: 600; }
.anchor .a-d { color: var(--text-2); margin-left: auto; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 12px 14px; align-items: center; font-size: 14px; }
.kv .k { color: var(--text-2); }
.kv .input, .kv .select { height: 38px; }

.keys { display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; font-size: 13.5px; color: var(--text-2); margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.keys .kbd { font-size: 12px; line-height: 20px; }

.notes { white-space: pre-wrap; font-size: 14px; color: var(--text-2); margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 100;
  max-width: calc(100vw - 32px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.muted { color: var(--text-3); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }

@media (max-width: 960px) {
  .panels { grid-template-columns: 1fr; }
  .ctl-side { margin-left: 0; }
}

@media (max-width: 760px) {
  .wrap { padding: 0 16px 48px; }
  .topbar-inner { padding: 10px 16px; }
  .stage { grid-template-columns: 1fr; gap: 12px; margin-top: 14px; }
  .pane:not(.active) .video { aspect-ratio: 16 / 5; }
  .row { grid-template-columns: 1fr; }
  .hide-sm { display: none !important; }
  .controls { justify-content: center; }
  .ctl-main { justify-content: center; width: 100%; }
  .ctl-side { justify-content: center; width: 100%; }
  .switch button { padding: 0 12px; }
  .marks { grid-template-columns: 1fr; }
  .hero { padding: 28px 0 16px; }
}