/* /video-manual/ — playlist-style listing for the GeoShred Manual & App Notes YouTube playlist.
   Built from data/video_manual_playlist.json; regenerate with
   scripts/fetch_video_manual_playlist.py. */

.vm-page {
  background: var(--mf-bg-primary);
  color: var(--mf-text-primary);
  font-family: var(--mf-font-body);
  min-height: calc(100vh - var(--mf-header-height));
}

.vm-section {
  padding: 56px 24px 96px;
}

.vm-inner {
  max-width: var(--mf-container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 48px;
  align-items: start;
}

/* ---------- Left rail ---------- */

.vm-rail {
  position: sticky;
  top: calc(var(--mf-header-height) + 24px);
  background: var(--mf-bg-card);
  border: 1px solid var(--mf-border-subtle);
  border-radius: 16px;
  padding: 20px;
}

.vm-rail-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
}

.vm-rail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.vm-rail-cover-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0);
  border: 0;
  cursor: pointer;
  transition: background var(--mf-transition);
}

.vm-rail-cover-play:hover,
.vm-rail-cover-play:focus-visible {
  background: rgba(0, 0, 0, 0.35);
  outline: none;
}

.vm-rail-cover-play svg {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--mf-transition), transform var(--mf-transition);
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
}

.vm-rail-cover-play:hover svg,
.vm-rail-cover-play:focus-visible svg {
  opacity: 1;
  transform: scale(1);
}

.vm-rail-title {
  margin: 18px 0 10px;
  font-family: var(--mf-font-display);
  font-size: 1.45rem;
  line-height: 1.2;
  color: var(--mf-text-white);
  letter-spacing: 0.01em;
}

.vm-rail-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--mf-text-meta);
}

.vm-rail-channel {
  color: var(--mf-text-primary);
}

.vm-rail-desc {
  margin: 12px 0 18px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--mf-text-primary);
}

.vm-rail-playall {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
  padding: 12px 18px;
  background: var(--mf-accent-orange);
  color: #fff;
  font-family: var(--mf-font-display);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--mf-transition);
}

.vm-rail-playall:hover,
.vm-rail-playall:focus-visible {
  background: var(--mf-accent-orange-hover);
  outline: none;
}

.vm-rail-yt {
  display: block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--mf-text-meta);
  text-decoration: none;
  text-align: center;
}

.vm-rail-yt:hover,
.vm-rail-yt:focus-visible {
  color: var(--mf-accent-orange);
  text-decoration: underline;
}

/* ---------- Right column / list ---------- */

.vm-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.vm-row {
  display: grid;
  grid-template-columns: 32px 196px 1fr;
  align-items: center;
  gap: 16px;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: background var(--mf-transition);
}

/* The row IS the .youtube-thumbnail-wrapper here, not a 16:9 thumb box.
   Override base.css's aspect-ratio padding hack and play-button overlay. */
.vm-row.youtube-thumbnail-wrapper {
  width: auto;
  padding: 10px 12px;
  background: transparent;
}
.vm-row.youtube-thumbnail-wrapper::after {
  display: none;
}

.vm-row + .vm-row {
  margin-top: 4px;
}

.vm-row:hover,
.vm-row:focus-visible {
  background: var(--mf-bg-alt2);
  outline: none;
}

.vm-row-num {
  color: var(--mf-text-meta);
  font-variant-numeric: tabular-nums;
  text-align: right;
  font-size: 0.85rem;
}

.vm-row-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  background: #000;
}

.vm-row-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.vm-row-duration {
  position: absolute;
  right: 4px;
  bottom: 4px;
  padding: 1px 5px;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  font-size: 0.72rem;
  border-radius: 3px;
  font-variant-numeric: tabular-nums;
}

.vm-row-body {
  min-width: 0;
}

.vm-row-title {
  color: var(--mf-text-white);
  font-size: 0.95rem;
  line-height: 1.35;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.vm-row-meta {
  font-size: 0.78rem;
  color: var(--mf-text-meta);
}

/* Highlight the currently-playing row (set by the lightbox auto-advance) */
.vm-row.vm-row--active {
  background: rgba(255, 107, 0, 0.10);
}

.vm-row.vm-row--active .vm-row-title {
  color: var(--mf-accent-orange);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .vm-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .vm-rail {
    position: static;
    top: auto;
  }
  .vm-row {
    grid-template-columns: 28px 140px 1fr;
    gap: 12px;
  }
}

@media (max-width: 520px) {
  .vm-section {
    padding: 32px 14px 56px;
  }
  .vm-row {
    grid-template-columns: 22px 110px 1fr;
    gap: 10px;
    padding: 8px;
  }
  .vm-row-title {
    font-size: 0.88rem;
  }
  .vm-row-meta {
    font-size: 0.72rem;
  }
}