/* ==================== Docs hero ==================== */
.docs-hero { padding: 70px 0 20px; text-align: center; }
.docs-hero .container { max-width: 680px; }
.docs-hero .lead { font-size: 1.08rem; color: var(--ink-soft); }

/* ==================== Video section ==================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.video-frame {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--ink-900);
}
.video-frame iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 0;
}
.video-card .content { padding: 18px 20px; }
.video-card h4 { margin-bottom: 4px; font-size: 0.98rem; }
.video-card p { font-size: 0.85rem; margin-bottom: 0; color: var(--ink-faint); }

.video-card.coming-soon {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px 24px;
  border-style: dashed;
  color: var(--ink-faint);
}
.video-card.coming-soon .icon-tile { margin: 0 auto 14px; }
.video-card.coming-soon h4 { color: var(--ink-faint); font-size: 0.92rem; margin-bottom: 4px; }
.video-card.coming-soon p { font-size: 0.82rem; }

/* ==================== Doc group ==================== */
.doc-group { margin-bottom: 8px; }
.doc-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
}
.doc-group-head h3 { margin-bottom: 0; }
.doc-group-head span { font-size: 0.86rem; color: var(--ink-faint); }

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 56px;
}
.doc-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.doc-card:hover { border-color: var(--blue); box-shadow: var(--shadow-sm); }
.doc-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--paper-alt);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--blue-deep);
}
.doc-icon svg { width: 22px; height: 22px; }
.doc-card .doc-body { flex: 1; min-width: 0; }
.doc-card h4 { margin-bottom: 4px; font-size: 1rem; }
.doc-card p { font-size: 0.87rem; margin-bottom: 12px; }
.doc-card .doc-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.doc-card .doc-meta a { font-weight: 600; font-size: 0.88rem; display: inline-flex; align-items: center; gap: 6px; }
.doc-card .doc-meta a svg { width: 15px; height: 15px; }
.doc-card .filesize { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint); }

/* ==================== Codec reference ==================== */
.codec-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
table.codec {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}
table.codec th, table.codec td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
table.codec thead th {
  background: var(--paper-alt);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  font-weight: 500;
}
table.codec tbody tr:last-child td { border-bottom: none; }
table.codec td.codec-name { font-family: var(--font-mono); font-weight: 500; color: var(--ink); }

/* ==================== Note callout ==================== */
.note-callout {
  display: flex;
  gap: 16px;
  background: var(--blue-tint);
  border: 1px solid #cfe9ff;
  border-radius: var(--radius-md);
  padding: 22px 26px;
}
.note-callout .icon-tile { flex-shrink: 0; }
.note-callout p { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }
.note-callout strong { color: var(--ink); }

@media (max-width: 900px) {
  .video-grid { grid-template-columns: 1fr; }
  .doc-grid { grid-template-columns: 1fr; }
}