:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --panel-border: #2a2e38;
  --text: #e8eaed;
  --text-muted: #9aa0ac;
  --accent: #6c8cff;
  --accent-text: #0f1115;
  --danger: #ff6b6b;
  --success: #4cd48a;
  --radius: 12px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5f7;
    --panel: #ffffff;
    --panel-border: #e2e4e9;
    --text: #1a1d24;
    --text-muted: #5c6270;
    --accent: #3a5cff;
    --accent-text: #ffffff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

.page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.intro-panel {
  max-width: 720px;
  margin: 0 auto;
}

.page-header {
  text-align: center;
  margin-bottom: 28px;
  position: relative;
}

.lang-switch {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  gap: 6px;
}

.lang-btn {
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-btn:hover {
  border-color: var(--accent);
}

.lang-btn.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.page-header h1 {
  margin: 0 0 6px;
  font-size: 1.8rem;
}

.subtitle {
  color: var(--text-muted);
  margin: 0;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 24px;
}

.field-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

#video-url {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 18px;
}

#video-url:focus {
  outline: 2px solid var(--accent);
}

.options-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.option-group {
  flex: 1 1 220px;
}

.toggle-group {
  display: flex;
  gap: 8px;
}

.toggle-btn {
  flex: 1;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}

.toggle-btn:hover {
  border-color: var(--accent);
}

.toggle-btn.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  font-weight: 600;
}

.primary-btn {
  width: 100%;
  padding: 13px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secondary-btn {
  padding: 9px 14px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
}

.secondary-btn:hover {
  border-color: var(--accent);
}

.status-area {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(108, 140, 255, 0.1);
  color: var(--text);
  font-size: 0.9rem;
}

.status-area.error {
  background: rgba(255, 107, 107, 0.12);
  color: var(--danger);
}

.hidden {
  display: none !important;
}

.result-area {
  margin-top: 24px;
}

.result-summary {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 18px;
}

.summary-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 0.8rem;
  font-weight: 600;
}

.meta {
  color: var(--text-muted);
  font-size: 0.85rem;
}

#summary-text {
  color: var(--text);
  margin: 0 0 14px;
}

.characters-panel {
  margin-bottom: 18px;
}

.characters-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.character-card {
  flex: 1 1 220px;
  max-width: 280px;
  background: rgba(108, 140, 255, 0.06);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.85rem;
}

.character-card .character-name {
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.character-card .character-field {
  margin-bottom: 4px;
  color: var(--text-muted);
}

.character-card .character-field b {
  color: var(--text);
  font-weight: 600;
  margin-right: 4px;
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
}

.table-toolbar .option-group {
  flex: 0 0 auto;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
}

.scenes-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.scenes-table th,
.scenes-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--panel-border);
  vertical-align: top;
  text-align: left;
}

.scenes-table th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
  z-index: 1;
}

.scenes-table tbody tr:last-child td {
  border-bottom: none;
}

.scenes-table .col-index {
  width: 36px;
  text-align: center;
}

.scenes-table .col-time {
  width: 100px;
  font-family: "Consolas", monospace;
  font-size: 0.8rem;
  white-space: nowrap;
}

.scenes-table .col-summary {
  width: 260px;
}

.scenes-table .col-prompt {
  width: 100%;
}

.cell-input {
  width: 100%;
  min-width: 180px;
  min-height: 70px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  resize: vertical;
}

.cell-input:focus {
  outline: 2px solid var(--accent);
}

.summary-cell {
  width: 260px;
}

.summary-cell .cell-input {
  min-height: 180px;
  font-style: italic;
}

.prompt-cell {
  width: 100%;
}

.prompt-cell .cell-input {
  width: 100%;
  min-width: 320px;
  min-height: 180px;
  font-family: "Consolas", monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  background: rgba(108, 140, 255, 0.06);
}

.copy-btn {
  margin-top: 8px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.8rem;
}

.copy-btn:hover {
  border-color: var(--accent);
}

.copy-btn.copied {
  color: var(--success);
  border-color: var(--success);
}

.copy-btn.copy-failed {
  color: var(--danger);
  border-color: var(--danger);
}