:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #dde1e7;
  --text: #1c2330;
  --muted: #6b7482;
  --accent: #2f6fed;
  --accent-soft: #e6eefe;
  --active: #fff6d6;
  --danger: #d23f3f;
  --ok: #1f8a4c;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171c;
    --surface: #1c2027;
    --surface-2: #252a33;
    --border: #333a45;
    --text: #e4e7ec;
    --muted: #949cab;
    --accent: #6d9bff;
    --accent-soft: #23304d;
    --active: #3a3420;
    --danger: #ff6b6b;
    --ok: #4cc27f;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
}

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

button {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; padding: 8px 18px; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; font-size: 12px; font-weight: normal; }

input[type="text"], input[type="search"], select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}

.muted { color: var(--muted); font-size: 12px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 16px; }
.brand span { font-weight: normal; color: var(--muted); font-size: 13px; margin-left: 8px; }
.env { font-size: 12px; color: var(--muted); }

.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(320px, 400px) 1fr;
}

.side {
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.panel h2 {
  font-size: 14px;
  margin: 0 0 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dropzone {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  text-align: center;
  padding: 18px 12px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  word-break: break-all;
}
.dropzone span { color: var(--muted); font-size: 12px; }
.dropzone.drag, .dropzone:hover { border-color: var(--accent); background: var(--accent-soft); }

.player { margin-top: 12px; }
.player video { width: 100%; max-height: 260px; background: #000; border-radius: 6px; display: block; }
.player.audio-only video { height: 40px; background: transparent; }
.player.audio-only #subtitleOpt { display: none; }
.player-opts { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 6px; font-size: 12px; color: var(--muted); }

.row { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.row label { display: flex; flex-direction: column; gap: 2px; font-size: 12px; color: var(--muted); }

.model-card {
  border: 1.5px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent-soft);
  padding: 8px 10px;
}
.mc-head { display: flex; align-items: center; gap: 6px; }
.mc-head strong { flex: 1; }
.badge { font-size: 11px; padding: 0 6px; border-radius: 10px; background: var(--surface-2); color: var(--ok); }
.mc-desc { margin: 2px 0 0; font-size: 12px; color: var(--muted); }
.mc-source { margin: 6px 0 0; font-size: 12px; overflow-wrap: anywhere; }
.mc-actions { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.mc-warn { margin: 6px 0 0; font-size: 12px; color: var(--danger); }
.guide { margin-top: 10px; font-size: 12px; }
.guide summary { cursor: pointer; color: var(--accent); }
.guide-steps { margin: 6px 0; padding-left: 18px; color: var(--muted); }
.guide-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 8px; margin-top: 6px; }
.gi-head { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; }
.gi-head .tag { font-size: 11px; padding: 0 6px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); }
.gi-links { display: flex; flex-wrap: wrap; gap: 4px 12px; margin-top: 4px; }
.gi-links .region { color: var(--muted); }
.note { font-size: 12px; color: var(--muted); margin: 8px 0 0; }

.actions { display: flex; gap: 8px; }
.progress { margin-top: 12px; font-size: 12px; color: var(--muted); }
.bar { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; margin-bottom: 4px; }
.bar div { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.message { margin-top: 10px; font-size: 13px; padding: 8px 10px; border-radius: 6px; background: var(--surface-2); word-break: break-word; }
.message.error { color: var(--danger); }

.work {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.toolbar .group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.toolbar .find input { width: 130px; }
.save-status { margin-left: auto; }

.segments {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px 40px;
}
.segments:empty::before {
  content: attr(data-empty);
  display: block;
  color: var(--muted);
  text-align: center;
  padding: 60px 20px;
}

.seg {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 6px;
  border-left: 3px solid transparent;
}
.seg:hover { background: var(--surface); }
.seg.active { background: var(--active); border-left-color: #e0a100; }
.seg.invalid { outline: 1.5px solid var(--danger); }

.seg-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 2px 4px;
  font: 12px/22px ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--muted);
}
.ts { cursor: pointer; padding: 0 2px; border-radius: 3px; }
.ts:hover { color: var(--accent); background: var(--accent-soft); }
.ts-input { width: 74px; font: inherit; padding: 0 2px; }
.seg-actions { display: flex; gap: 3px; visibility: hidden; width: 100%; }
.seg:hover .seg-actions, .seg:focus-within .seg-actions { visibility: visible; }
.seg-actions button { font-size: 11px; padding: 0 5px; line-height: 18px; }
.seg-actions .danger:hover { color: var(--danger); border-color: var(--danger); }
.readonly .edit-only { display: none; }

.seg-text {
  outline: none;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 15px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 1.7em;
}
.seg-text[contenteditable="plaintext-only"]:focus,
.seg-text[contenteditable="true"]:focus { background: var(--surface); box-shadow: 0 0 0 1.5px var(--accent); }

.help { padding: 8px 16px 12px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); background: var(--surface); }
.help summary { cursor: pointer; }
.help ul { margin: 6px 0 0; padding-left: 18px; }
kbd { font: 11px ui-monospace, monospace; padding: 0 4px; border: 1px solid var(--border); border-radius: 3px; background: var(--surface-2); }

@media (max-width: 860px) {
  body { height: auto; }
  .layout { grid-template-columns: 1fr; }
  .side { border-right: 0; overflow: visible; padding: 16px 16px 0; }
  .segments { overflow: visible; padding: 12px 16px; }
  .seg { grid-template-columns: 1fr; gap: 2px; }
  .seg-actions { visibility: visible; width: auto; }
  .toolbar { padding: 10px 16px; }
}