:root {
  --bg: #0c1117; --panel: #131a22; --panel2: #1b242e; --line: #26323f;
  --text: #e8eef5; --muted: #8b9bb0; --accent: #2dd4bf; --accent-ink: #04201c;
  --cut: #ff6b57; --cut-bg: rgb(255 107 87 / 14%); --sel: rgb(45 212 191 / 22%); --sug: #f5b83d;
  --radius: 12px; --ease: cubic-bezier(.2, .7, .2, 1); --shadow: 0 8px 30px rgb(0 0 0 / 35%);
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans CJK TC", "Noto Sans CJK SC", "Noto Sans CJK JP", "Noto Sans CJK KR", "PingFang TC", "Microsoft JhengHei", "Malgun Gothic", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #f4f7f9; --panel: #ffffff; --panel2: #e9eef3; --line: #d3dce5;
  --text: #0f1a24; --muted: #596b7d; --accent: #0d9488; --accent-ink: #ffffff;
  --cut: #d9412e; --cut-bg: rgb(217 65 46 / 11%); --sel: rgb(13 148 136 / 18%); --sug: #b7791f;
  --shadow: 0 8px 30px rgb(15 26 36 / 10%);
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 var(--font); -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
button, input, select { font: inherit; color: inherit; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: var(--mono); font-size: 13px; }
.error { color: var(--cut); }
.accent { color: var(--accent); }
.cutc { color: var(--cut); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.topbar { display: flex; align-items: center; gap: 14px; padding: 10px 20px; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -.01em; color: var(--text); text-decoration: none; }
.project-picker { min-width: 0; max-width: 360px; flex: 1; }
.project-picker select { width: 100%; }
.topbar-right { margin-left: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; min-width: 0; }
#open-file { white-space: nowrap; }
select, input[type="text"] { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 7px 10px; min-height: 38px; }
select:hover, input[type="text"]:hover { border-color: var(--muted); }
input[type="range"] { accent-color: var(--accent); }
input[type="color"] { width: 44px; height: 32px; padding: 2px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }

.btn { background: var(--panel2); border: 1px solid var(--line); border-radius: 10px; padding: 7px 14px; min-height: 38px; cursor: pointer; transition: background .15s, border-color .15s, transform .08s; }
.btn:hover:not(:disabled) { border-color: var(--muted); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: default; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 650; }
.btn.ghost { background: transparent; }
.btn.icon { padding: 0; width: 38px; display: inline-grid; place-items: center; }
.btn.small { min-height: 30px; padding: 3px 10px; font-size: 13px; }
.btn.toggle[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 650; }

.banner a { color: inherit; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.banner { margin: 0; padding: 8px 20px; text-align: center; font-size: 13.5px; background: color-mix(in srgb, var(--accent) 14%, var(--panel)); border-bottom: 1px solid var(--line); }
main { max-width: 1400px; margin: 0 auto; padding: 18px 20px 40px; }

.empty { display: grid; place-items: center; min-height: 64vh; }
.drop { text-align: center; max-width: 560px; padding: 44px 32px; border: 2px dashed var(--line); border-radius: 24px; transition: border-color .2s, background .2s; }
.drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.drop h1 { font-size: 28px; letter-spacing: -.02em; margin: 14px 0 8px; line-height: 1.2; }
.drop p { color: var(--muted); margin: 0 0 20px; }
.drop .hint { margin: 14px 0 18px; font-size: 13px; }
.options { text-align: left; margin-top: 18px; }
.options summary { cursor: pointer; color: var(--muted); font-size: 13px; width: fit-content; padding: 4px 0; }
.options summary:hover { color: var(--text); }
.options[open] summary { margin-bottom: 8px; }
.options .hint { margin: 8px 0; }
.tx-fields { display: grid; gap: 10px; }
.tx-fields .field { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.tx-fields select { color: var(--text); width: 100%; }
.tx-fields .check { font-size: 13px; color: var(--muted); align-items: flex-start; }
.tx-fields .check input { flex: none; margin-top: 1px; }
#proc-back { margin-top: 18px; }
.path-form { display: flex; gap: 8px; }
.path-form input { flex: 1; min-width: 0; font-family: var(--mono); font-size: 13px; }

.processing { max-width: 560px; margin: 14vh auto; text-align: center; }
.processing h2 { font-size: 22px; margin: 0 0 18px; }
.progress { height: 10px; background: var(--panel2); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, white)); border-radius: 99px; transition: width .3s var(--ease); }

.editor { display: grid; grid-template-columns: minmax(340px, 5fr) minmax(0, 6fr); gap: 20px; align-items: start; }
.stage { position: sticky; top: 64px; display: grid; gap: 12px; }
.video-wrap { position: relative; background: #000; border-radius: var(--radius); overflow: hidden; aspect-ratio: var(--ar, 16 / 9); width: min(100%, calc(62vh * var(--arn, 1.778))); margin: 0 auto; box-shadow: var(--shadow); container-type: size; }
.video-wrap video { width: 100%; height: 100%; object-fit: contain; display: block; }
.audio-only { position: absolute; inset: 0; display: grid; place-items: center; color: var(--accent); background: var(--panel); }
.transport { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.clock { font-family: var(--mono); font-size: 13px; color: var(--muted); min-width: 92px; }
.speed select { min-height: 30px; padding: 2px 6px; font-size: 13px; }
.wave { width: 100%; height: 84px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); cursor: pointer; touch-action: none; display: block; }
.summary { display: flex; gap: 22px; margin: 0; padding: 4px 2px; }
.summary dt { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.summary dd { margin: 0; font: 600 20px/1.2 var(--mono); }

/* caption preview, sized in container units so it matches the render at any player size */
.caption-layer { position: absolute; inset: 0; pointer-events: none; display: flex; justify-content: center; align-items: flex-end; padding: 0 6cqw 8cqh; font-family: Arial, var(--font); font-weight: 700; text-align: center; line-height: 1.15; }
.caption-layer[data-pos="middle"] { align-items: center; padding-bottom: 0; }
.caption-layer[data-pos="top"] { align-items: flex-start; padding-top: 8cqh; padding-bottom: 0; }
.caption-layer .cap { font-size: var(--cap-size, 7cqh); color: var(--cap-color, #fff); -webkit-text-stroke: calc(var(--cap-size, 7cqh) / 14) #000; paint-order: stroke fill; text-shadow: 0 .06em .12em rgb(0 0 0 / 50%); }
.caption-layer .cap .on { color: var(--cap-accent, #ffb224); }
.caption-layer[data-style="pop"] .cap .on { display: inline-block; animation: pop .2s var(--ease); }
.caption-layer[data-style="lowerthird"] { justify-content: flex-start; align-items: flex-end; padding: 0 5cqw 7cqh; text-align: left; }
.caption-layer[data-style="lowerthird"] .cap { -webkit-text-stroke: 0; text-shadow: none; background: rgb(16 17 20 / 82%); padding: .25em .5em; font-size: calc(var(--cap-size, 7cqh) * .8); }
@keyframes pop { from { transform: scale(.6); } 60% { transform: scale(1.15); } to { transform: scale(1); } }

.side { min-width: 0; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.tabs button { background: none; border: 0; border-bottom: 2px solid transparent; padding: 9px 14px; cursor: pointer; color: var(--muted); font-weight: 600; margin-bottom: -1px; }
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
.panel { display: grid; gap: 12px; }

.cleanup { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; display: grid; gap: 10px; }
.clean-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.clean-row.pauses { font-size: 13.5px; }
.clean-row.pauses input[type=range] { width: 110px; }
.clean-row.find { gap: 8px; }
#find-input { flex: 1 1 160px; min-width: 0; max-width: 260px; height: 30px; padding: 0 10px; font: inherit; font-size: 13.5px; color: var(--text); background: var(--panel2); border: 1px solid var(--line); border-radius: 10px; }
#find-input::placeholder { color: var(--muted); }
#find-input:focus-visible { border-color: var(--accent); }
.sel-bar { display: flex; gap: 8px; align-items: center; }
.touch-only { display: none; }
.kind { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--panel2); }
.kind > button { background: none; border: 0; padding: 5px 10px; min-height: 30px; cursor: pointer; font-size: 13px; }
.kind > button:hover:not(:disabled) { background: color-mix(in srgb, var(--text) 8%, transparent); }
.kind > button:disabled { opacity: .4; cursor: default; }
.kind > .main[aria-pressed="true"], .kind > .main[aria-pressed="true"]:hover:not(:disabled) { background: var(--accent); color: var(--accent-ink); font-weight: 650; }
.kind .step { border-left: 1px solid var(--line); padding: 5px 8px; }
.note { margin: 0; font-size: 13px; color: var(--muted); }

.transcript { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; line-height: 2.1; font-size: 16.5px; max-height: calc(100vh - 330px); min-height: 240px; overflow-y: auto; user-select: none; scroll-behavior: smooth; }
.transcript:focus-visible { outline-offset: 0; }
.w { padding: 2px 1px; border-radius: 5px; cursor: pointer; transition: background .08s; white-space: pre-wrap; }
.w:hover { background: color-mix(in srgb, var(--text) 9%, transparent); }
.w.sug { text-decoration: underline dotted var(--sug) 2px; text-underline-offset: 4px; }
.w.hit { background: color-mix(in srgb, var(--sug) 22%, transparent); }
.w.sel { background: var(--sel); }
.w.hit-now { background: color-mix(in srgb, var(--sug) 48%, transparent); }
.w.cursor { box-shadow: inset 0 -2px 0 var(--accent); }
.w.now { background: var(--accent); color: var(--accent-ink); }
.w.del { color: var(--cut); background: var(--cut-bg); text-decoration: line-through; text-decoration-thickness: 2px; }
.w.del.sel { background: color-mix(in srgb, var(--cut) 30%, transparent); }
.w.edited { font-style: italic; }
.w-edit { font: inherit; width: 8ch; min-width: 4ch; background: var(--panel2); color: var(--text); border: 1px solid var(--accent); border-radius: 5px; padding: 0 4px; line-height: 1.5; }
.gap { font: 600 11px/1 var(--mono); color: var(--muted); background: var(--panel2); border: 1px dashed var(--line); border-radius: 99px; padding: 3px 8px; margin: 0 4px; cursor: pointer; vertical-align: middle; }
.gap:hover { border-color: var(--cut); color: var(--cut); }
.gap.cut { color: var(--cut); background: var(--cut-bg); border: 1px solid var(--cut); }
.gap.minor { opacity: .0; width: 0; padding: 0; margin: 0; border: 0; pointer-events: none; }

.styles { display: flex; gap: 8px; flex-wrap: wrap; border: 0; padding: 0; margin: 0; }
.styles legend { padding: 0; margin-bottom: 8px; font-size: 13px; color: var(--muted); }
.style-card { position: relative; background: var(--panel); border: 2px solid var(--line); border-radius: 12px; padding: 14px 16px; min-width: 104px; text-align: center; cursor: pointer; font-weight: 700; }
.style-card input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.style-card:has(input:checked) { border-color: var(--accent); }
.style-card:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.style-card small { display: block; font-weight: 500; color: var(--muted); margin-top: 4px; font-size: 12px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 18px; }
.grid2 label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }

.exports { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.exports li { display: flex; align-items: center; gap: 12px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; }
.exports li > div { flex: 1; min-width: 0; }
.exports strong { display: block; }
.exports span { font-size: 13px; color: var(--muted); }
.render-box { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; display: grid; gap: 8px; }
.render-box p { margin: 0; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--panel2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 16px; box-shadow: var(--shadow); z-index: 50; max-width: min(90vw, 520px); }

@media (max-width: 960px) {
  .editor { grid-template-columns: 1fr; }
  .stage { position: sticky; top: 0; z-index: 10; background: var(--bg); padding-bottom: 8px; }
  .video-wrap { width: min(100%, calc(50vh * var(--arn, 1.778))); }
  .wave { height: 56px; }
  .summary { display: none; }
  .transcript { max-height: none; }
  main { padding: 12px; }
  .topbar { padding: 8px 12px; gap: 8px; flex-wrap: wrap; position: static; }
}
@media (pointer: coarse) {
  .touch-only { display: revert; }
  .fine-only { display: none; }
  .btn.small, .kind > button { min-height: 44px; }
  .kind .step { min-width: 40px; }
  #find-input { height: 44px; max-width: none; font-size: 16px; }
  .kind .main { padding-inline: 14px; }
  .gap { padding: 8px 12px; }
  input[type=range] { height: 32px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }
#retx-start { margin-top: 10px; }