:root {
  color-scheme: light;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --panel: #ffffff;
  --page: #f4f6f8;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --warn: #b45309;
  --warn-soft: #fff7ed;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.07);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

button, textarea { font: inherit; }

.app-shell {
  width: min(1400px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.topbar, .audio-head, .section-heading, .card-topline, .finalize-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.topbar { align-items: center; margin-bottom: 20px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 4px; font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: -0.03em; }
h2 { margin-bottom: 4px; font-size: 1.12rem; }
h3 { margin: 2px 0 0; font-size: 1.05rem; }
.eyebrow, .segment-label, .field-label { color: var(--muted); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; }
.eyebrow { margin-bottom: 3px; color: var(--accent); }
.muted { color: var(--muted); margin-bottom: 0; }
.brand-icon { width: 72px; height: 72px; object-fit: contain; border-radius: 18px; background: #fff; box-shadow: var(--shadow); }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.control-panel { margin-bottom: 18px; }
.cut-editor { margin-bottom: 18px; }
.cut-toolbar { display: grid; grid-template-columns: 1fr auto 1fr auto minmax(180px, 1.4fr) auto auto; align-items: end; gap: 10px; }
.cut-toolbar label, .cut-card-fields label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.cut-toolbar input, .cut-card-fields input { width: 100%; padding: 9px 10px; border: 1px solid #cbd5e1; border-radius: 9px; color: var(--ink); background: #fff; }
.cut-toolbar input:focus, .cut-card-fields input:focus { outline: 3px solid rgba(20, 184, 166, 0.2); border-color: var(--accent); }
.cut-list { display: grid; gap: 10px; margin-top: 14px; }
.cut-card { padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #f8fafc; }
.cut-card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.cut-card-head .muted { flex: 1; font-variant-numeric: tabular-nums; }
.cut-card-fields { display: grid; grid-template-columns: 180px 180px minmax(180px, 1fr); gap: 10px; }
.cut-empty { margin: 12px 0 0; color: var(--muted); }
.audio-head { align-items: center; margin-bottom: 14px; }
audio { width: 100%; }
.audio-readout { display: flex; justify-content: space-between; margin-top: 6px; color: var(--muted); font-variant-numeric: tabular-nums; }
.badge { display: inline-flex; padding: 5px 10px; border-radius: 999px; color: var(--warn); background: var(--warn-soft); font-size: 0.84rem; font-weight: 700; white-space: nowrap; }

.episode-materials { display: block; margin-bottom: 18px; }
.marshmallow-toolbar { display: grid; grid-template-columns: minmax(260px, 1fr) auto auto; align-items: end; gap: 12px; margin: 14px 0; }
.marshmallow-toolbar label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.marshmallow-toolbar input[type="file"] { width: 100%; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--text); }
.marshmallow-list { display: grid; gap: 12px; }
.marshmallow-card { display: grid; grid-template-columns: 150px minmax(0, 1fr); align-items: center; gap: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: #f8fafc; }
.marshmallow-thumb { display: block; width: 150px; height: 110px; object-fit: contain; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.marshmallow-card-fields { display: grid; grid-template-columns: minmax(130px, 1.5fr) repeat(5, minmax(78px, 1fr)) auto; align-items: end; gap: 8px; }
.marshmallow-card-fields label { display: grid; gap: 4px; color: var(--muted); font-size: 0.76rem; font-weight: 700; }
.marshmallow-card-fields input { width: 100%; min-width: 0; padding: 8px; border: 1px solid var(--line); border-radius: 7px; background: #fff; color: var(--text); }
.marshmallow-card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.marshmallow-align { padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px; color: var(--text); background: #fff; cursor: pointer; white-space: nowrap; }
.marshmallow-align:hover { background: var(--accent-soft); }
.marshmallow-remove { padding: 8px 10px; border: 1px solid #fecaca; border-radius: 7px; color: #991b1b; background: #fff; cursor: pointer; white-space: nowrap; }
.marshmallow-remove:hover { background: #fef2f2; }
.marshmallow-empty { margin: 0; padding: 16px; border: 1px dashed var(--line); border-radius: 10px; color: var(--muted); }
.question-image { display: block; width: 100%; max-height: 260px; object-fit: contain; border-radius: 12px; background: #f9fafb; }
.video-output { margin-bottom: 18px; }
.video-output video { display: block; width: 100%; max-height: 72vh; border-radius: 12px; background: #000; }
.live-preview { margin-bottom: 18px; }
.preview-badge { color: var(--accent); background: var(--accent-soft); }
#live-preview-canvas { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: 12px; background: #152238; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08); }
#preview-audio { margin-top: 12px; }
.subtitle-settings { display: grid; grid-template-columns: minmax(220px, 0.8fr) minmax(400px, 1.2fr); align-items: center; gap: 24px; margin-bottom: 18px; }
.subtitle-layout-grid { grid-column: 2; display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 12px; }
.subtitle-style-grid { grid-column: 2; display: grid; grid-template-columns: repeat(3, minmax(130px, 1fr)); align-items: end; gap: 12px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 12px; }
.settings-grid label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.bgm-settings { display: grid; grid-template-columns: minmax(220px, 0.8fr) minmax(400px, 1.2fr); align-items: center; gap: 24px; margin-bottom: 18px; }
.bgm-controls { display: grid; grid-template-columns: minmax(170px, 0.7fr) minmax(220px, 1.3fr); align-items: end; gap: 12px; }
.bgm-controls label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.bgm-controls select, .bgm-controls input[type="file"] { width: 100%; }
.switch-row { display: flex !important; grid-template-columns: none !important; align-items: center; gap: 8px !important; min-height: 38px; }
.switch-row input { width: 18px; height: 18px; }
.bgm-upload-row { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 10px; grid-column: 1 / -1; }
.bgm-controls > button { justify-self: start; }
.settings-grid input, .subtitle-style-grid input, .subtitle-style-grid select { width: 100%; padding: 9px 10px; border: 1px solid #cbd5e1; border-radius: 9px; color: var(--ink); background: #fff; }
.subtitle-style-grid label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.subtitle-style-grid input[type="color"] { height: 39px; padding: 4px; cursor: pointer; }
.subtitle-style-grid input[type="range"] { padding: 9px 0; accent-color: var(--accent); }
.subtitle-style-grid output, .subtitle-layout-grid output { color: var(--accent); font-variant-numeric: tabular-nums; }
.subtitle-style-grid button { align-self: end; }
.settings-grid input:focus { outline: 3px solid rgba(20, 184, 166, 0.2); border-color: var(--accent); }
.secondary { border: 1px solid #99f6e4; border-radius: 10px; padding: 10px 14px; color: var(--accent); background: #f0fdfa; font-weight: 700; cursor: pointer; white-space: nowrap; }
.secondary:hover:not(:disabled) { background: var(--accent-soft); }
.secondary:disabled { opacity: 0.5; cursor: wait; }
.subtitle-settings #subtitle-calibration, .subtitle-settings #subtitle-status { grid-column: 2; margin-top: -12px; font-size: 0.86rem; }
.subtitle-settings #subtitle-status a { color: var(--accent); font-weight: 700; }

.review-layout { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr); align-items: start; gap: 18px; }
.review-column { min-width: 0; }
.section-heading { align-items: center; margin: 8px 0 14px; }
.section-heading.compact { margin-top: 0; }
.progress { color: var(--accent); font-size: 0.9rem; font-weight: 700; white-space: nowrap; }
.review-list { display: grid; gap: 14px; }
.review-card { padding: 20px; border: 1px solid #fed7aa; border-left: 5px solid #f59e0b; border-radius: 16px; background: #fffdf8; }
.card-topline { align-items: center; margin-bottom: 14px; }
.timestamp, .timeline-item { border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--accent); cursor: pointer; }
.timestamp { padding: 8px 12px; font-size: 0.84rem; font-weight: 700; }
.timestamp:hover, .timeline-item:hover { border-color: var(--accent); background: var(--accent-soft); }
.original-block, .candidate-block { padding: 12px 14px; border-radius: 10px; margin-bottom: 12px; }
.original-block { background: #f3f4f6; }
.candidate-block { background: #ecfdf5; }
.original-block p, .candidate-block p { margin: 4px 0 0; white-space: pre-wrap; }
.signal, .signal-list { color: var(--warn); font-size: 0.86rem; }
.signal-list { margin: 8px 0 12px; padding-left: 20px; }
.correction { width: 100%; resize: vertical; margin-top: 5px; padding: 11px 12px; border: 1px solid #cbd5e1; border-radius: 10px; color: var(--ink); background: #fff; }
.correction:focus { outline: 3px solid rgba(20, 184, 166, 0.2); border-color: var(--accent); }
.confirm-row { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: 0.9rem; font-weight: 700; cursor: pointer; }
.confirm-row input { width: 18px; height: 18px; accent-color: var(--accent); }

.context-column { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow: hidden; }
.timeline { display: grid; gap: 5px; max-height: calc(100vh - 150px); overflow: auto; padding-right: 4px; }
.timeline-item { display: grid; grid-template-columns: 70px 1fr; gap: 8px; align-items: start; width: 100%; padding: 8px 10px; text-align: left; color: var(--ink); }
.timeline-item.flagged { border-color: #fdba74; background: #fff7ed; }
.timeline-time { color: var(--accent); font-variant-numeric: tabular-nums; font-size: 0.78rem; font-weight: 700; }
.timeline-text { min-width: 0; overflow: hidden; color: #4b5563; font-size: 0.82rem; text-overflow: ellipsis; white-space: nowrap; }

.finalize-bar { align-items: center; margin-top: 18px; }
.finalize-actions { display: flex; align-items: center; justify-content: flex-end; gap: 10px; flex-wrap: wrap; }
.edit-package { margin-top: 18px; }
.edit-package-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.package-download { display: inline-flex; align-items: center; text-decoration: none; }
.primary { border: 0; border-radius: 10px; padding: 12px 18px; color: #fff; background: var(--accent); font-weight: 700; cursor: pointer; }
.primary:hover:not(:disabled) { background: #115e59; }
.primary:disabled { opacity: 0.45; cursor: not-allowed; }
.result { margin-top: 18px; border-color: #99f6e4; background: #f0fdfa; }
.result a { color: var(--accent); font-weight: 700; }
.error { margin: 18px 0 0; padding: 12px 14px; border-radius: 10px; color: #991b1b; background: #fef2f2; }
.hidden { display: none; }

@media (max-width: 900px) {
  .review-layout, .subtitle-settings { grid-template-columns: 1fr; }
  .marshmallow-toolbar { grid-template-columns: 1fr; }
  .cut-toolbar { grid-template-columns: 1fr 1fr; }
  .cut-toolbar label:nth-of-type(3) { grid-column: 1 / -1; }
  .cut-card-fields { grid-template-columns: 1fr 1fr; }
  .marshmallow-card { grid-template-columns: 1fr; }
  .marshmallow-thumb { width: 100%; height: 160px; }
  .marshmallow-card-fields { grid-template-columns: repeat(2, minmax(100px, 1fr)); }
  .marshmallow-card-actions { grid-column: 1 / -1; }
  .subtitle-layout-grid, .subtitle-style-grid, .subtitle-settings #subtitle-calibration, .subtitle-settings #subtitle-status { grid-column: 1; }
  .subtitle-style-grid { grid-template-columns: repeat(2, minmax(130px, 1fr)); }
  .settings-grid { grid-template-columns: 1fr 1fr auto; }
  .subtitle-settings #subtitle-status { grid-column: 1; margin-top: 0; }
  .context-column { position: static; max-height: none; }
  .timeline { max-height: 360px; }
}

@media (max-width: 560px) {
  .app-shell { width: min(100% - 20px, 1400px); padding-top: 16px; }
  .panel { padding: 16px; border-radius: 14px; }
  .topbar, .finalize-bar, .card-topline { align-items: stretch; flex-direction: column; }
  .brand-icon { width: 58px; height: 58px; }
  .timestamp { align-self: flex-start; }
  .settings-grid, .subtitle-layout-grid, .subtitle-style-grid { grid-template-columns: 1fr; }
  .bgm-settings { grid-template-columns: 1fr; }
  .bgm-controls { grid-template-columns: 1fr; }
  .bgm-upload-row { grid-template-columns: 1fr; }
  .cut-toolbar, .cut-card-fields { grid-template-columns: 1fr; }
  .cut-toolbar label:nth-of-type(3) { grid-column: auto; }
  .cut-card-head { align-items: flex-start; flex-wrap: wrap; }
}