/*
 * previews.css — the tool layout (input panel) plus the four preview
 * context mimics: desktop search result, watch-page sidebar tile,
 * mobile home-feed card, channel-grid tile.
 *
 * These are original layouts built from scratch to approximate the
 * general shape/spacing/type-scale of common video-platform list UIs
 * (thumbnail + title + byline pattern). They deliberately use generic
 * system fonts, a non-YouTube accent color, and no logos/icons/marks
 * of any kind. Exact spacing is an approximation — see /site/NOTES.md.
 */

.tool-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 28px;
  padding: 24px 0 8px;
  align-items: start;
}

@media (max-width: 860px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
}

.input-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  position: sticky;
  top: 16px;
}

@media (max-width: 860px) {
  .input-panel {
    position: static;
  }
}

.input-panel h2 {
  font-size: 1.0625rem;
  margin: 0 0 14px;
}

.input-panel .field-row {
  grid-template-columns: 1fr;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 18px 0;
}

.toolbar-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.previews {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 760px) {
  .previews {
    grid-template-columns: 1fr;
  }
}

.preview-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  background: var(--bg);
}

.preview-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.preview-card__head h2 {
  font-size: 0.9375rem;
  margin: 0;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.preview-card__stage {
  background: var(--bg-inset);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  justify-content: center;
  overflow: auto;
}

.preview-tile__warning {
  margin: 10px 0 0;
  font-size: 0.8125rem;
  color: var(--warning-fg);
  background: var(--warning-bg);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

.preview-tile__warning[hidden] {
  display: none;
}

/* ---------- Shared preview-tile primitives ---------- */

.yt-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-inset);
  border-radius: 8px;
  overflow: hidden;
  flex: 0 0 auto;
}

.yt-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yt-thumb__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8px;
  font-size: 0.75rem;
  line-height: 1.35;
  color: var(--text-secondary);
  background: repeating-linear-gradient(
    135deg,
    var(--bg-inset),
    var(--bg-inset) 10px,
    var(--border) 10px,
    var(--border) 11px
  );
}

.yt-thumb.has-image .yt-thumb__placeholder {
  display: none;
}

.yt-duration {
  position: absolute;
  right: 4px;
  bottom: 4px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 1px 4px;
  border-radius: 3px;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

.yt-duration:empty {
  display: none;
}

.yt-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex: 0 0 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  text-transform: uppercase;
}

.yt-title {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  word-break: break-word;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.yt-title--placeholder {
  color: var(--text-secondary);
  font-weight: 500;
  font-style: italic;
}

.yt-channel {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.yt-meta {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.yt-channel:empty,
.yt-meta:empty {
  display: none;
}

/* ---------- Desktop search result row ---------- */

.preview-tile--search {
  display: flex;
  gap: 16px;
  width: 100%;
  max-width: 560px;
  font-family: var(--font-sans);
}

.preview-tile--search .yt-thumb {
  width: 240px;
  flex-basis: 240px;
}

.preview-tile--search .yt-title {
  font-size: 1.125rem;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

.preview-tile--search .yt-body {
  min-width: 0;
  padding-top: 2px;
}

.preview-tile--search .yt-byline {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.preview-tile--search .yt-avatar {
  width: 24px;
  height: 24px;
  flex-basis: 24px;
  font-size: 0.6875rem;
}

/* ---------- Watch-page sidebar tile ---------- */

.preview-tile--sidebar {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 360px;
  font-family: var(--font-sans);
}

.preview-tile--sidebar .yt-thumb {
  width: 168px;
  flex-basis: 168px;
}

.preview-tile--sidebar .yt-body {
  min-width: 0;
}

.preview-tile--sidebar .yt-title {
  font-size: 0.875rem;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

.preview-tile--sidebar .yt-channel {
  margin-top: 4px;
}

.preview-tile--sidebar .yt-meta {
  margin-top: 2px;
}

/* ---------- Mobile home-feed card ---------- */

.preview-tile--mobile {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 360px;
  font-family: var(--font-sans);
}

.preview-tile--mobile .yt-thumb {
  width: 100%;
  border-radius: 10px;
}

.preview-tile--mobile .yt-byline {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.preview-tile--mobile .yt-body {
  min-width: 0;
}

.preview-tile--mobile .yt-title {
  font-size: 0.9375rem;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

.preview-tile--mobile .yt-channel {
  margin-top: 4px;
}

/* ---------- Channel-page grid tile ---------- */

.preview-tile--grid {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 280px;
  font-family: var(--font-sans);
}

.preview-tile--grid .yt-thumb {
  width: 100%;
  border-radius: 8px;
}

.preview-tile--grid .yt-title {
  font-size: 0.875rem;
  margin-top: 8px;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

.preview-tile--grid .yt-meta {
  margin-top: 4px;
}

/* Channel grid tiles intentionally omit a channel-name/avatar row: on
   a real channel page you are already on that channel, so individual
   video tiles only show title + views + age. */