/* ============================================================
   PROJECT DETAIL PAGES — project-detail.css
   ============================================================ */

/* ── Page Hero ── */
.pd-hero {
  padding: calc(var(--nav-h) + 60px) 24px 50px;
  background: linear-gradient(180deg, rgba(0,212,255,0.04) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.pd-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
  transition: color var(--dur) var(--ease), gap var(--dur) var(--ease);
}
.pd-back:hover { color: var(--accent); gap: 12px; }
.pd-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.pd-year {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-left: auto;
}
.pd-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.25rem);
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 20px;
}
.pd-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 680px;
}

/* ── Body Layout ── */
.pd-body {
  padding: 60px 24px 100px;
}
.pd-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}
.pd-main { min-width: 0; }

/* ── Sections ── */
.pd-section {
  margin-bottom: 60px;
}
.pd-section-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.pd-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Video Grid ── */
.pd-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.pd-video-card {
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.pd-video {
  width: 100%;
  display: block;
  aspect-ratio: 16/9;
  background: #000;
  max-height: 320px;
  object-fit: contain;
}
.pd-video-label {
  padding: 10px 14px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.pd-youtube-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  overflow: hidden;
}
.pd-youtube-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ── Image Carousel ── */
.carousel-wrap {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.carousel-main {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  overflow: hidden;
}
.carousel-slide {
  display: none;
  width: 100%;
  height: 100%;
}
.carousel-slide.active {
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-height: 480px;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(7,11,20,0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  z-index: 10;
}
.carousel-btn:hover { background: var(--accent-dim); border-color: var(--border-hover); }
.carousel-btn.prev { left: 12px; }
.carousel-btn.next { right: 12px; }
.carousel-counter {
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: rgba(7,11,20,0.7);
  padding: 4px 10px;
  border-radius: 99px;
}
.carousel-thumbs {
  display: flex;
  gap: 8px;
  padding: 12px;
  overflow-x: auto;
  scrollbar-width: thin;
  background: rgba(0,0,0,0.2);
}
.carousel-thumb {
  flex-shrink: 0;
  width: 72px;
  height: 54px;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
  opacity: 0.6;
}
.carousel-thumb.active { border-color: var(--accent); opacity: 1; }
.carousel-thumb img { width: 100%; height: 100%; object-fit: cover; }
.carousel-empty {
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

/* ── About / Details ── */
.pd-about {
  margin-bottom: 28px;
}
.pd-about p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.pd-about p:last-child { margin-bottom: 0; }
.pd-about strong { color: var(--text-primary); }
.pd-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.pd-detail-item {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.pd-detail-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.pd-detail-value {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.4;
}

/* ── Sidebar ── */
.pd-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
}
.pd-sidebar-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.pd-sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.pd-sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pd-sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pd-sidebar-link:hover, .pd-sidebar-link.current {
  background: var(--accent-dim);
  color: var(--text-primary);
}
.pd-sidebar-link.current { border-left: 2px solid var(--accent); padding-left: 10px; }
.pd-sidebar-link-icon { font-size: 1rem; flex-shrink: 0; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .pd-layout {
    grid-template-columns: 1fr;
  }
  .pd-sidebar {
    position: static;
    order: -1;
  }
  .pd-sidebar-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: start;
  }
  .pd-sidebar-links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }
  .pd-sidebar-link {
    padding: 8px 10px;
    font-size: 0.8125rem;
  }
}
@media (max-width: 600px) {
  .pd-video-grid { grid-template-columns: 1fr; }
  .pd-detail-grid { grid-template-columns: 1fr; }
  .pd-sidebar-inner { grid-template-columns: 1fr; }
}