:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-soft: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #60a5fa;
  --accent-2: #22c55e;
  --danger: #ef4444;
  --border: #374151;
  --card-selected: #1d4ed8;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: #0b1224;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 16px 18px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
}

.subtitle {
  margin: 8px 0 16px;
  color: var(--muted);
}

.global-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.global-controls button,
.global-controls select {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-soft);
  color: var(--text);
  padding: 8px 12px;
  font-size: 0.95rem;
  cursor: pointer;
}

.global-controls button:hover,
.global-controls select:hover {
  border-color: var(--accent);
}

.global-controls label {
  color: var(--muted);
  font-size: 0.92rem;
}

.status-text {
  margin: 10px 0 0;
  min-height: 20px;
  color: var(--accent-2);
  font-size: 0.92rem;
}

.page-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 16px 28px;
}

.category-section {
  margin-bottom: 28px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}

.category-header {
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border);
  background: #0f1b33;
}

.category-title {
  margin: 0;
  font-size: 1.2rem;
}

.category-desc {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.4;
}

.cards-grid {
  padding: 14px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

.subgroup-block {
  padding: 10px 14px 14px;
}

.subgroup-block + .subgroup-block {
  border-top: 1px dashed var(--border);
}

.subgroup-title {
  margin: 4px 0 0;
  font-size: 1.02rem;
  color: #bfdbfe;
}

.video-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0b1328;
  padding: 10px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.video-card:hover {
  border-color: #4b5563;
}

.video-card.selected {
  border-color: var(--card-selected);
  box-shadow: 0 0 0 2px rgba(29, 78, 216, 0.35);
}

.video-card video {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #000;
}

.card-name {
  margin: 8px 0 6px;
  font-size: 1rem;
}

.card-notes {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.metric-tag {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 0.82rem;
  color: #dbeafe;
}

.metrics-three {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.metric-box {
  flex-shrink: 0;
}

.metric-rating-wrap {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 6px;
  padding: 2px 6px;
}

.metric-rating-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.metric-rating-select {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.82rem;
  padding: 2px 6px;
  cursor: pointer;
}

.metric-rating-select:hover,
.metric-rating-select:focus {
  border-color: var(--accent);
}

.section-empty,
.empty-state {
  margin: 14px;
  padding: 16px;
  border: 1px dashed #475569;
  border-radius: 10px;
  color: var(--muted);
  background: rgba(30, 41, 59, 0.3);
}

.empty-state {
  margin: 18px 0;
}

.hidden {
  display: none;
}

.site-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px 22px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer code,
.empty-state code {
  color: #bfdbfe;
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.3rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }
}