/* ═══════════════════════════════════════════════
   STAGE MODULE — Performance stages
   ═══════════════════════════════════════════════ */

.view { display: none; }
.view.active { display: block; }

/* ── Stage Card Grid ── */
.stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

.stage-group-label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--color-text-muted);
  padding-bottom: 6px;
  margin-top: 16px;
  border-bottom: 1px solid var(--color-border);
}

.stage-group-label:first-child {
  margin-top: 0;
}

/* ── Accordion (mobile collapsible, desktop always open) ── */
.stage-accordion {
  grid-column: 1 / -1;
  margin-bottom: 8px;
}

.stage-accordion__header {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 14px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--color-accent);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  text-align: left;
}

.stage-accordion__header:hover {
  border-color: var(--color-border-accent);
}

.stage-accordion__arrow {
  font-size: 14px;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.stage-accordion__header.open .stage-accordion__arrow {
  transform: rotate(90deg);
}

.stage-accordion__name {
  flex: 1;
}

.stage-accordion__count {
  font-size: 10px;
  color: var(--color-text-muted);
  letter-spacing: 1px;
}

.stage-accordion__body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
}

.stage-accordion__body.open {
  max-height: 9999px;
}

/* Desktop: always show body, hide arrow */
@media (min-width: 769px) {
  .stage-accordion__header {
    cursor: default;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    padding: 8px 0;
    margin-top: 16px;
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--color-accent);
  }

  .stage-accordion__header:first-child {
    margin-top: 0;
  }

  .stage-accordion__arrow {
    display: none;
  }

  .stage-accordion__body {
    max-height: none !important;
    overflow: visible;
  }
}

.stage-subgrid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

.stage-card {
  cursor: pointer;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.stage-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-2px);
}

.stage-card__img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-surface);
}

.stage-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.75) saturate(0.7);
  transition: filter 0.3s;
}

.stage-card:hover .stage-card__img img {
  filter: brightness(0.6) saturate(0.5);
}

.stage-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--color-text-muted);
  opacity: 0.3;
}

.stage-card__info {
  padding: 12px 14px;
}

.stage-card__show {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text);
  letter-spacing: 2px;
  line-height: 1.2;
}

.stage-card__song {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--color-accent);
  letter-spacing: 1px;
  margin-top: 4px;
}

.stage-card__date {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-text-muted);
  letter-spacing: 2px;
  margin-top: 4px;
}

/* ── Stage Tabs ── */
.stage-tabs {
  display: flex;
  gap: 4px;
  position: sticky;
  top: 60px;
  z-index: 10;
  background: var(--color-bg);
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.stage-tab {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--color-text-muted);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 12px 16px;
  cursor: pointer;
  background: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}

.stage-tab:hover {
  color: var(--color-text-secondary);
}

.stage-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ── Stage Detail Page ── */
.stage-detail {
  padding: var(--space-8) var(--content-padding);
  max-width: var(--max-width);
  margin: 0 auto;
}

.stage-detail__show {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--color-accent);
  text-shadow: 0 0 20px rgba(0, 255, 65, 0.25);
  letter-spacing: 2px;
  line-height: 1;
  margin-bottom: 8px;
}

.stage-detail__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 2px;
  margin-bottom: var(--space-8);
}

.stage-detail__meta span {
  color: var(--color-accent);
}

/* ── Source Label ── */
.stage-song-label {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--color-accent);
  letter-spacing: 1px;
  margin-top: var(--space-8);
  margin-bottom: 4px;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.2);
}

.stage-song-label:first-child {
  margin-top: 0;
}

.stage-source-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}

/* ── Video Items Grid (in detail view) ── */
.stage-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}
.stage-video-item {
  cursor: pointer;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.stage-video-item:hover {
  border-color: var(--color-border-accent);
}

.stage-video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  overflow: hidden;
}

.stage-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.7);
  transition: filter 0.3s;
}

.stage-video-item:hover .stage-video-thumb img {
  filter: brightness(0.5);
}

.stage-video-thumb iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.stage-video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 68px;
  height: 48px;
  border-radius: 14px;
  background: rgba(255, 0, 0, 0.85);
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.9;
  transition: opacity 0.2s, transform 0.2s;
}

.stage-video-item:hover .stage-video-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.08);
}

.stage-video-info {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-focus-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  padding: 2px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}

.focus-group {
  background: rgba(0, 255, 65, 0.1);
  color: var(--color-accent);
  border: 1px solid var(--color-border-accent);
}

.focus-woochan {
  background: rgba(0, 255, 65, 0.1);
  color: var(--color-accent);
  border: 1px solid var(--color-border-accent);
}

.stage-video-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text);
  letter-spacing: 1px;
}

/* ── Back Button ── */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--color-text-muted);
  cursor: pointer;
  margin-bottom: var(--space-8);
  background: none;
  border: none;
  padding: 0;
  transition: color 0.2s;
}

.back-btn::before { content: '← '; }
.back-btn:hover { color: var(--color-accent); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .stage-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .stage-tab {
    white-space: nowrap;
  }

  .stage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stage-subgrid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stage-video-grid {
    grid-template-columns: 1fr;
  }

  .stage-detail__show {
    font-size: 32px;
  }
}