/* ==========================================================================
   Data Gallery — Styles
   Separate from styles.css to avoid breaking the main page.
   ========================================================================== */

/* --- Page Shell --- */

.dg-page {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.dg-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--font-size-caption);
  font-weight: 500;
  padding: 40px 0 0;
}

.dg-back-link:hover {
  text-decoration: underline;
}

.dg-header {
  text-align: center;
  padding: 32px 0 24px;
}

.dg-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 8px;
}

.dg-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* --- Filter / Tab Bar --- */

.dg-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 0 0 28px;
}

.dg-filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: 999px;
  border: 1.5px solid #D1D5DB;
  background: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-caption);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.15s ease;
}

.dg-filter-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.dg-filter-pill.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* Tab bar (for comparisons page) */
.dg-tab-bar {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 2px solid #E5E7EB;
}

.dg-tab {
  padding: 10px 28px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.dg-tab:hover {
  color: var(--color-text-primary);
}

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

/* --- Scene Group --- */

.dg-scene-group {
  margin-bottom: 32px;
}

.dg-scene-heading {
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #E5E7EB;
}

/* --- Video Grid --- */

.dg-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.dg-grid--cols-6 {
  grid-template-columns: repeat(6, 1fr);
}

.dg-grid--cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* --- Video Card --- */

.dg-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #F3F4F6;
  cursor: pointer;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.dg-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.dg-card video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #000;
}

.dg-card-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 3px 3px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 11px;
  line-height: 1.2;
  font-weight: 600;
  text-align: center;
  pointer-events: none;
}

/* Ablations page only, desktop only: its dense 6-column grid has narrow cards and
   long labels (e.g. "LaCT-NVS w/ L₂ w/ Mem Caching"), so shrink them to fit. Other
   galleries keep the normal 11px. Below 1024px the grid drops to 3/2/1 columns
   where cards are wide enough for the normal size. */
@media (min-width: 1025px) {
  .dg-page--ablations .dg-card-label {
    font-size: 9px;
  }
}

/* --- Lightbox --- */

.dg-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.dg-lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.dg-lightbox-inner {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dg-lightbox-inner video {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 8px;
  display: block;
}

.dg-lightbox-caption {
  color: #fff;
  font-size: var(--font-size-caption);
  font-weight: 500;
  margin-top: 12px;
  text-align: center;
}

.dg-lightbox-close {
  position: absolute;
  top: -40px;
  right: -8px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.dg-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Lightbox prev/next navigation */
.dg-lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.dg-lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

.dg-lightbox-nav--prev {
  left: -64px;
}

.dg-lightbox-nav--next {
  right: -64px;
}

/* --- Landing Page (gallery.html) --- */

.dg-landing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding-bottom: 60px;
}

.dg-landing-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px 28px;
  border-radius: 14px;
  border: 2px solid #E5E7EB;
  text-decoration: none;
  color: var(--color-text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.dg-landing-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 6px 24px rgba(58, 134, 200, 0.12);
  transform: translateY(-3px);
  color: var(--color-text-primary);
}

.dg-landing-card svg {
  width: 44px;
  height: 44px;
  color: var(--color-accent);
}

.dg-landing-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
}

.dg-landing-card-desc {
  font-size: var(--font-size-caption);
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.5;
}

.dg-landing-card-arrow {
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--color-accent);
}

/* --- Footer Gallery Links (on main page) --- */

.dg-footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 700px;
  margin: 0 auto;
}

.dg-footer-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  background-color: var(--color-btn-bg);
  color: var(--color-btn-text);
  font-size: var(--font-size-caption);
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.dg-footer-chip:hover {
  opacity: 0.85;
  color: var(--color-btn-text);
}

.dg-footer-chip svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* --- Responsive --- */

@media (max-width: 1024px) {
  .dg-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .dg-grid--cols-6 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .dg-grid,
  .dg-grid--cols-6,
  .dg-grid--cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .dg-landing-grid {
    grid-template-columns: 1fr;
  }
  .dg-footer-links {
    grid-template-columns: 1fr;
  }
  .dg-lightbox-nav--prev {
    left: 8px;
  }
  .dg-lightbox-nav--next {
    right: 8px;
  }
}

@media (max-width: 480px) {
  .dg-grid,
  .dg-grid--cols-6,
  .dg-grid--cols-3 {
    grid-template-columns: 1fr;
  }
}