:root {
  --app-accent: #c7f36b;
  --paper: #eef0ed;
  --surface: #ffffff;
  --ink: #18212b;
  --muted: #5f6b75;
  --line: #d3d8d4;
  --curtain: #2f4a5a;
  --curtain-ink: #ffffff;
  --tape: #e8b83a;
  --tape-ink: #2a2105;
  --danger: #b3261e;
  --mirror-bg: #1f2c35;
  color-scheme: light;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12181d;
    --surface: #1b232a;
    --ink: #e7ebe8;
    --muted: #9aa6ae;
    --line: #2d3943;
    --curtain: #8fb3c5;
    --curtain-ink: #0e1a21;
    --tape: #e8b83a;
    --tape-ink: #2a2105;
    --danger: #ff8a80;
    --mirror-bg: #0b1115;
    color-scheme: dark;
  }
}
*, *::before, *::after { box-sizing: inherit; }
[hidden] { display: none !important; }
.camera-top-tools,.mobile-camera-actions,.drawer-heading,.drawer-backdrop { display:none; }
.recording-badge { position:absolute; top:16px; left:16px; z-index:9; padding:7px 10px; border-radius:20px; color:white; background:#8f2020df; font-size:12px; }
.countdown { position:absolute; inset:0; display:grid; place-items:center; z-index:20; font-size:100px; font-weight:700; color:white; background:#0005; pointer-events:none; }
.camera-icon { display:grid; place-items:center; width:46px; height:46px; border-radius:50%; border:1px solid #ffffff50; background:#172421b8; color:white; font:26px system-ui; cursor:pointer; }
.video-pair { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.video-pair video { aspect-ratio:9/16; max-height:300px; }
.video-label { font-size:12px; padding:6px; margin:0; }
.video-grid .video-card { min-width:0; }
.video-card-actions a { text-decoration:none; }
.capture-note { color:var(--muted); font-size:12px; }
input[type=password],textarea,select { font-size:16px; }

@media (max-width:900px) {
  html,body { width:100%; height:100%; overflow:hidden; background:#08100d; }
  :root { padding:0; }
  .topbar,.tape,.log,.session-actions,.desktop-only { display:none !important; }
  .layout { display:block; padding:0; margin:0; width:100%; height:100dvh; }
  .stage { height:100%; }
  .mirror,.mirror.portrait { position:relative; width:100%; height:100dvh; max-height:none; aspect-ratio:auto; border-radius:0; background:#08100d; }
  #output { object-fit:contain; background:#08100d; }
  .pip { display:none !important; }
  .camera-top-tools { display:flex; position:absolute; z-index:12; left:18px; right:18px; top:calc(env(safe-area-inset-top,0px) + 16px); align-items:center; justify-content:space-between; }
  .app-wordmark { font-size:12px; font-weight:700; letter-spacing:2px; color:white; text-shadow:0 1px 6px #000; }
  .mobile-camera-actions { display:flex; align-items:center; justify-content:space-between; gap:16px; position:absolute; z-index:12; left:22px; right:22px; bottom:calc(env(safe-area-inset-bottom,0px) + 24px); }
  .mobile-start,.mobile-stop { min-height:56px; border:0; border-radius:32px; padding:16px 24px; background:var(--app-accent); color:#162312; font:600 15px 'Be Vietnam Pro',sans-serif; cursor:pointer; box-shadow:0 8px 30px #0004; }
  .mobile-stop { background:#e94c4c; color:white; }
  .mobile-start:disabled { opacity:.5; }
  .recording-badge { top:calc(env(safe-area-inset-top,0px) + 75px); font-size:11px; }
  .fullscreen-btn { right:18px; bottom:calc(env(safe-area-inset-bottom,0px) + 100px); font-size:11px; min-height:36px; }
  .status { top:auto; bottom:calc(env(safe-area-inset-bottom,0px) + 145px); left:18px; max-width:calc(100% - 36px); border-radius:12px; font-size:12px; padding:8px 12px; pointer-events:none; }
  .empty { text-align:center; padding:25px; pointer-events:none; }
  .empty-title { font-size:20px; max-width:none; }
  .empty-note { display:none; }
  .panel { display:none; position:fixed; inset:auto 0 0; max-height:86dvh; z-index:10001; overflow-y:auto; overscroll-behavior:contain; border-radius:24px 24px 0 0; background:var(--paper); padding:16px 16px calc(env(safe-area-inset-bottom,0px) + 24px); gap:12px; }
  body.settings-open .panel { display:flex; }
  .drawer-heading { display:flex; justify-content:space-between; align-items:center; position:sticky; top:-16px; background:var(--paper); padding:8px 0; z-index:2; }
  .drawer-heading h2 { font-size:22px; margin:0; }
  .drawer-heading .camera-icon { color:var(--ink); border-color:var(--line); background:var(--surface); font-size:20px; }
  .drawer-backdrop { position:fixed; inset:0; z-index:10000; background:#0009; backdrop-filter:blur(4px); }
  body.settings-open .drawer-backdrop { display:block; }
  .block { padding:16px; }
  .video-library { margin-top:0; }
  .video-library-head { flex-direction:column; }
  .video-grid { grid-template-columns:1fr; }
  .prompt-preview { font-size:11px; }
}

html, body { margin: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px 18px;
}
h1 { font-size: 30px; line-height: 1.1; margin: 0; font-weight: 700; letter-spacing: -0.01em; }
.sub { margin: 4px 0 0; color: var(--muted); }
.credits { margin: 0; color: var(--muted); font-variant-numeric: tabular-nums; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 40px;
  align-items: start;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 0 16px 32px; }
  .topbar { padding: 20px 16px 14px; }
}

/* Khung gương */
.mirror {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--mirror-bg);
  border-radius: 14px 14px 0 0;
  overflow: hidden;
}
#output.flip { transform: scaleX(-1); }
#output { width: 100%; height: 100%; object-fit: contain; display: block; background: var(--mirror-bg); }
.pip {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 22%;
  min-width: 110px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.85);
  background: #000;
}
.pip.flip { transform: scaleX(-1); }
.empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8% 10%;
  color: #e9eef0;
}
.empty-title { font-size: clamp(18px, 2.4vw, 26px); font-weight: 600; line-height: 1.3; margin: 0 0 10px; max-width: 26ch; }
.empty-note { margin: 0; color: #b6c3ca; max-width: 52ch; }
.status {
  position: absolute;
  left: 12px;
  top: 12px;
  margin: 0;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.62);
  color: #fff;
  font-size: 13px;
  max-width: calc(100% - 24px);
}
.status.error { background: #b3261e; color: #fff; }
.fullscreen-btn {
  display: none;
  position: absolute;
  z-index: 8;
  right: 12px;
  bottom: 12px;
  min-height: 44px;
  padding: 9px 13px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 999px;
  background: rgba(0,0,0,.68);
  color: #fff;
  font: 600 14px/1 "Be Vietnam Pro", system-ui, sans-serif;
  box-shadow: 0 2px 10px rgba(0,0,0,.28);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.fullscreen-btn:active { transform: scale(.97); }

@media (max-width: 900px) {
  .fullscreen-btn { display: inline-flex; align-items: center; justify-content: center; }
  .mirror.mobile-fullscreen {
    position: fixed;
    z-index: 9999;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    aspect-ratio: auto;
    border-radius: 0;
    background: #000;
  }
  .mirror.mobile-fullscreen #output { object-fit: contain; }
  .mirror.mobile-fullscreen .status { top: max(12px, env(safe-area-inset-top)); }
  .mirror.mobile-fullscreen .fullscreen-btn {
    right: max(12px, env(safe-area-inset-right));
    bottom: max(12px, env(safe-area-inset-bottom));
  }
  body.camera-fullscreen { overflow: hidden; }
}

/* Thước dây: thời gian và chi phí */
.tape {
  background: var(--tape);
  color: var(--tape-ink);
  border-radius: 0 0 14px 14px;
  padding: 0 16px 12px;
}
.tape-track {
  position: relative;
  height: 16px;
  margin: 0 -16px 10px;
  background:
    repeating-linear-gradient(90deg, rgba(42, 33, 5, 0.75) 0 1px, transparent 1px 10px) top left / 100% 7px no-repeat,
    repeating-linear-gradient(90deg, rgba(42, 33, 5, 0.9) 0 1.5px, transparent 1.5px 50px) top left / 100% 13px no-repeat;
}
.tape-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: rgba(42, 33, 5, 0.18);
  border-right: 2px solid var(--tape-ink);
  transition: width 0.4s linear;
}
.tape-read { display: flex; flex-wrap: wrap; gap: 8px 32px; margin: 0; }
.tape-read dt { font-size: 12px; opacity: 0.8; }
.tape-read dd { margin: 0; font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }

.session-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

.video-library {
  margin-top: 18px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.video-library-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.video-library-head h2 { margin-bottom: 4px; }
.video-library-head p { margin: 0; color: var(--muted); font-size: 13px; max-width: 66ch; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-top: 16px; }
.video-card { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--paper); }
.video-card video { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: #000; }
.video-card-body { padding: 10px; }
.video-card-title { margin: 0 0 8px; font-size: 13px; font-weight: 600; }
.video-card-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.video-card-actions .btn { padding: 7px 10px; font-size: 13px; }
@media (max-width: 560px) {
  .video-library-head { flex-direction: column; }
  .video-grid { grid-template-columns: 1fr; }
}

/* Bảng điều khiển */
.panel { display: flex; flex-direction: column; gap: 16px; }
.block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
h2 { font-size: 16px; margin: 0 0 12px; font-weight: 600; }

.drop {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  padding: 12px;
  cursor: pointer;
  min-height: 84px;
}
.drop:hover { border-color: var(--curtain); }
.drop:focus-within { outline: 2px solid var(--curtain); outline-offset: 2px; }
.drop input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.drop img { width: 72px; height: 72px; object-fit: contain; background: #fff; border-radius: 6px; flex: none; }
.drop-text { font-weight: 500; }
.drop-text small { display: block; font-weight: 400; color: var(--muted); font-size: 12.5px; margin-top: 2px; }

.field { display: block; margin-top: 14px; }
.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
select, textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
}
textarea { resize: vertical; }
select:focus-visible, textarea:focus-visible { outline: 2px solid var(--curtain); outline-offset: 1px; }

.check { display: flex; gap: 8px; align-items: flex-start; margin-top: 12px; cursor: pointer; }
.check input { margin-top: 4px; accent-color: var(--curtain); }

.prompt-preview { font-size: 12.5px; color: var(--muted); margin: 12px 0; overflow-wrap: anywhere; }
.prompt-preview code { font-family: inherit; color: var(--ink); }

.hint { font-size: 12.5px; color: var(--muted); margin: 8px 0 0; }
.hint.error { color: var(--danger); }

.btn {
  font: inherit;
  font-weight: 600;
  border-radius: 999px;
  padding: 10px 20px;
  border: 1.5px solid var(--curtain);
  background: transparent;
  color: var(--curtain);
  cursor: pointer;
}
.btn.primary { background: var(--curtain); color: var(--curtain-ink); }
.btn.wide { width: 100%; margin-top: 12px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:focus-visible, .link:focus-visible, .preset:focus-visible { outline: 2px solid var(--tape); outline-offset: 2px; }
.link {
  font: inherit;
  font-size: 13px;
  background: none;
  border: 0;
  padding: 4px 0;
  color: var(--curtain);
  text-decoration: underline;
  cursor: pointer;
}

.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.preset {
  font: inherit;
  font-size: 13.5px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}
.preset:hover { border-color: var(--curtain); }
.preset[aria-pressed="true"] { border-color: var(--curtain); box-shadow: inset 0 0 0 1px var(--curtain); }

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

.row2 { display: grid; grid-template-columns: 1.4fr 1fr; gap: 10px; }
.row2 .field { margin-top: 14px; }

.log { margin-top: 16px; font-size: 13px; color: var(--muted); }
.log summary { cursor: pointer; }
.log ol {
  margin: 8px 0 0;
  padding: 10px 10px 10px 34px;
  max-height: 220px;
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-variant-numeric: tabular-nums;
}
.log li.bad { color: var(--danger); }

/* Khung dọc 9:16 */
.mirror.portrait { aspect-ratio: auto; height: min(70vh, 880px); }
.mirror.portrait #output { object-fit: contain; }
.mirror.portrait .pip { aspect-ratio: 9 / 16; width: 15%; min-width: 80px; }

input[type="password"], input[type="text"] {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px;
}
input:focus-visible { outline: 2px solid var(--curtain); outline-offset: 1px; }
.key-status { margin: 0; font-size: 14px; }
.key-status.missing { color: var(--danger); font-weight: 600; }
#keyBlock.missing { border-color: var(--danger); }
/* Camera shell overrides the original desktop layout on phones. */
@media (max-width:900px) {
  .panel { display:none; }
  body.settings-open .panel { display:flex; }
  .layout { padding:0; margin:0; height:100dvh; }
  .mirror,.mirror.portrait { height:100dvh; aspect-ratio:auto; border-radius:0; }
  .fullscreen-btn { bottom:calc(env(safe-area-inset-bottom,0px) + 100px); }
  .panel { padding-top:16px; }
  .mirror.mobile-fullscreen .fullscreen-btn { bottom:calc(env(safe-area-inset-bottom,0px) + 100px); }
  input[type=password],textarea,select { font-size:16px; }
  .status { top:auto; }
}