/* ═══════════════════════════════════════════════════════
   PORTAL THEME SYSTEM
   Each portal page applies a CSS class on the <section>
   that overrides --portal-accent and theme-specific styles.
   ═══════════════════════════════════════════════════════ */

/* ─── Base portal page ─── */
.portal-page {
  --portal-accent: var(--color-accent);
  --portal-accent-muted: rgba(0, 212, 170, 0.15);
}

.portal-hero {
  position: relative;
  overflow: hidden;
  min-height: 14rem;
}

.portal-hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

.portal-hero .section-label {
  color: var(--portal-accent);
}

.portal-breadcrumb {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.portal-breadcrumb a {
  color: var(--color-text-muted);
  transition: color 0.15s;
}
.portal-breadcrumb a:hover {
  color: var(--portal-accent);
}

/* ─── Books: Warm Library ─── */
.portal-books {
  --portal-accent: #D4A574;
  --portal-accent-muted: rgba(212, 165, 116, 0.15);
}
.portal-books .portal-hero-bg {
  background: linear-gradient(135deg, #1a1510 0%, var(--color-bg-base) 100%);
  background-image:
    linear-gradient(135deg, #1a1510 0%, var(--color-bg-base) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 3rem, rgba(212,165,116,0.04) 3rem, rgba(212,165,116,0.04) 3.1rem);
}
.portal-books h1,
.portal-books .portal-hero h1 {
  font-family: var(--font-serif);
}
.portal-books .glass-card:hover {
  border-color: rgba(212, 165, 116, 0.3);
}

/* ─── Comics: Panel Grid ─── */
.portal-comics {
  --portal-accent: #FF6B9D;
  --portal-accent-muted: rgba(255, 107, 157, 0.15);
}
.portal-comics .portal-hero-bg {
  background: linear-gradient(135deg, #1a0a14 0%, var(--color-bg-base) 100%);
  background-image:
    linear-gradient(135deg, #1a0a14 0%, var(--color-bg-base) 100%),
    radial-gradient(circle, rgba(255,107,157,0.04) 1px, transparent 1px);
  background-size: 100% 100%, 8px 8px;
}

.comic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.5rem;
}
.comic-grid > a {
  border: 2px solid rgba(255, 107, 157, 0.12);
  border-radius: 0.25rem;
  overflow: hidden;
  transition: transform 0.2s, border-color 0.2s;
}
.comic-grid > a:hover {
  transform: rotate(0.5deg) scale(1.02);
  border-color: rgba(255, 107, 157, 0.4);
}

/* ─── Screenplays: Film Strip ─── */
.portal-screenplays {
  --portal-accent: #FFD700;
  --portal-accent-muted: rgba(255, 215, 0, 0.15);
}
.portal-screenplays .portal-hero-bg {
  background:
    linear-gradient(135deg, #141208 0%, var(--color-bg-base) 100%);
}
.portal-screenplays .portal-hero-bg::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200%;
  height: 200%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(255,215,0,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.portal-screenplays h1 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── Newspapers: Broadsheet ─── */
.portal-newspapers {
  --portal-accent: #C8B8A0;
  --portal-accent-muted: rgba(200, 184, 160, 0.15);
}
.portal-newspapers .portal-hero-bg {
  background: linear-gradient(135deg, #1a1914 0%, var(--color-bg-base) 100%);
}
.portal-newspapers h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.newspaper-grid {
  column-count: 3;
  column-gap: 1.5rem;
  column-rule: 1px solid var(--color-border);
}
.newspaper-grid > a {
  break-inside: avoid;
  display: block;
  margin-bottom: 1.5rem;
}
@media (max-width: 1023px) {
  .newspaper-grid { column-count: 2; }
}
@media (max-width: 767px) {
  .newspaper-grid { column-count: 1; column-rule: none; }
}

/* ─── Poetry: Flowing Elegance ─── */
.portal-poetry {
  --portal-accent: #B8A9E8;
  --portal-accent-muted: rgba(184, 169, 232, 0.15);
}
.portal-poetry .portal-hero-bg {
  background: linear-gradient(135deg, #12101a 0%, var(--color-bg-base) 100%);
}
.portal-poetry h1 {
  font-family: var(--font-serif);
  font-style: italic;
}

.poetry-grid {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 42rem;
  margin: 0 auto;
  gap: 2rem;
}
@media (min-width: 768px) {
  .poetry-grid { grid-template-columns: repeat(2, 1fr); }
}
.poetry-grid > a {
  padding: 1.5rem;
  border-left: 2px solid var(--portal-accent-muted);
  transition: border-color 0.2s;
}
.poetry-grid > a:hover {
  border-color: var(--portal-accent);
}

/* ─── Articles: Clean Editorial ─── */
.portal-articles {
  --portal-accent: #00D4AA;
  --portal-accent-muted: rgba(0, 212, 170, 0.15);
}
.portal-articles .portal-hero-bg {
  background: linear-gradient(135deg, #0a100e 0%, var(--color-bg-base) 100%);
}

.editorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.editorial-grid > :first-child {
  grid-column: span 2;
  grid-row: span 2;
}
@media (max-width: 767px) {
  .editorial-grid {
    grid-template-columns: 1fr;
  }
  .editorial-grid > :first-child {
    grid-column: span 1;
    grid-row: span 1;
  }
}

/* ─── Blog: Coral Editorial ─── */
.portal-blog {
  --portal-accent: #FF7F6E;
  --portal-accent-muted: rgba(255, 127, 110, 0.15);
}

/* ─── Vlogs: Video Thumbnails ─── */
.portal-vlogs {
  --portal-accent: #FF4444;
  --portal-accent-muted: rgba(255, 68, 68, 0.15);
}
.portal-vlogs .portal-hero-bg {
  background: linear-gradient(135deg, #1a0a0a 0%, var(--color-bg-base) 100%);
}

/* ─── Movies: Cinema Dark ─── */
.portal-movies {
  --portal-accent: #E8B64A;
  --portal-accent-muted: rgba(232, 182, 74, 0.15);
}
.portal-movies .portal-hero-bg {
  background: linear-gradient(135deg, #14110a 0%, var(--color-bg-base) 100%);
}
.portal-movies .portal-hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 60%;
  height: 100%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at top center, rgba(232,182,74,0.05) 0%, transparent 60%);
  pointer-events: none;
}

/* ─── Streaming: Electric Blue ─── */
.portal-streaming {
  --portal-accent: #4D9AFF;
  --portal-accent-muted: rgba(77, 154, 255, 0.15);
}
.portal-streaming .portal-hero-bg {
  background: linear-gradient(135deg, #0a0e1a 0%, var(--color-bg-base) 100%);
}

/* ─── Music: Warm Vinyl ─── */
.portal-music {
  --portal-accent: #1DB954;
  --portal-accent-muted: rgba(29, 185, 84, 0.15);
}
.portal-music .portal-hero-bg {
  background: linear-gradient(135deg, #0a1a10 0%, var(--color-bg-base) 100%);
}

/* ─── Podcasts: Deep Booth ─── */
.portal-podcasts {
  --portal-accent: #8B5CF6;
  --portal-accent-muted: rgba(139, 92, 246, 0.15);
}
.portal-podcasts .portal-hero-bg {
  background: linear-gradient(135deg, #100a1a 0%, var(--color-bg-base) 100%);
}

/* ─── Software: Terminal ─── */
.portal-software {
  --portal-accent: #22D3EE;
  --portal-accent-muted: rgba(34, 211, 238, 0.15);
}
.portal-software .portal-hero-bg {
  background: linear-gradient(135deg, #0a1418 0%, var(--color-bg-base) 100%);
  background-image:
    linear-gradient(135deg, #0a1418 0%, var(--color-bg-base) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 1.5rem, rgba(34,211,238,0.03) 1.5rem, rgba(34,211,238,0.03) 1.55rem);
}

/* ─── Games: Neon Arcade ─── */
.portal-games {
  --portal-accent: #A855F7;
  --portal-accent-muted: rgba(168, 85, 247, 0.15);
}
.portal-games .portal-hero-bg {
  background: linear-gradient(135deg, #120a1a 0%, var(--color-bg-base) 100%);
  background-image:
    linear-gradient(135deg, #120a1a 0%, var(--color-bg-base) 100%),
    radial-gradient(circle, rgba(168,85,247,0.04) 1px, transparent 1px);
  background-size: 100% 100%, 10px 10px;
}

/* ─── 3D Models: Workshop ─── */
.portal-3d-models {
  --portal-accent: #F59E0B;
  --portal-accent-muted: rgba(245, 158, 11, 0.15);
}
.portal-3d-models .portal-hero-bg {
  background: linear-gradient(135deg, #1a1408 0%, var(--color-bg-base) 100%);
}

/* ─── Textbooks: Academic ─── */
.portal-textbooks {
  --portal-accent: #3B82F6;
  --portal-accent-muted: rgba(59, 130, 246, 0.15);
}
.portal-textbooks .portal-hero-bg {
  background: linear-gradient(135deg, #0a0e1a 0%, var(--color-bg-base) 100%);
}

/* ─── Datasets: Data Lab ─── */
.portal-datasets {
  --portal-accent: #14B8A6;
  --portal-accent-muted: rgba(20, 184, 166, 0.15);
}
.portal-datasets .portal-hero-bg {
  background: linear-gradient(135deg, #081412 0%, var(--color-bg-base) 100%);
  background-image:
    linear-gradient(135deg, #081412 0%, var(--color-bg-base) 100%),
    repeating-linear-gradient(90deg, transparent, transparent 2rem, rgba(20,184,166,0.03) 2rem, rgba(20,184,166,0.03) 2.05rem);
}

/* ═══════════════════════════════════════════════════════
   VIDEO GRID — shared for vlogs, movies, streaming
   ═══════════════════════════════════════════════════════ */

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
@media (max-width: 639px) {
  .video-grid { grid-template-columns: 1fr; }
}

.video-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, transform 0.2s;
}
.video-card:hover {
  border-color: var(--portal-accent-muted);
  transform: translateY(-2px);
}

.video-thumb {
  aspect-ratio: 16/9;
  position: relative;
  overflow: hidden;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.video-thumb .placeholder-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.06));
}

.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 0.2s;
}
.video-card:hover .play-overlay {
  opacity: 1;
}
.play-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
}
.play-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  color: #0A0A0F;
  margin-left: 2px;
}

.video-meta {
  padding: 0.75rem 1rem;
}

/* ═══════════════════════════════════════════════════════
   MUSIC GRID — square album art cards
   ═══════════════════════════════════════════════════════ */

.music-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
}
@media (max-width: 639px) {
  .music-grid { grid-template-columns: repeat(2, 1fr); }
}

.music-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, transform 0.2s;
}
.music-card:hover {
  border-color: var(--portal-accent-muted);
  transform: translateY(-2px);
}

.music-art {
  aspect-ratio: 1/1;
  position: relative;
  overflow: hidden;
}
.music-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.music-art .placeholder-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(29,185,84,0.05), rgba(29,185,84,0.1));
}

.music-card .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 0.2s;
}
.music-card:hover .play-overlay {
  opacity: 1;
}

.music-meta {
  padding: 0.625rem 0.75rem;
}

/* ═══════════════════════════════════════════════════════
   SOFTWARE GRID — icon-centered app cards
   ═══════════════════════════════════════════════════════ */

.software-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}
@media (max-width: 639px) {
  .software-grid { grid-template-columns: repeat(2, 1fr); }
}

.software-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1rem 1rem;
  border-radius: 0.75rem;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, transform 0.2s;
}
.software-card:hover {
  border-color: var(--portal-accent-muted);
  transform: translateY(-2px);
}

.software-icon {
  width: 4rem;
  height: 4rem;
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 0.75rem;
}
.software-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.software-icon .placeholder-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(34,211,238,0.05), rgba(34,211,238,0.1));
  border-radius: 1rem;
}

.software-meta {
  width: 100%;
}

/* ═══════════════════════════════════════════════════════
   GAMES GRID — wide screenshot cards (16:9)
   ═══════════════════════════════════════════════════════ */

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
@media (max-width: 639px) {
  .games-grid { grid-template-columns: 1fr; }
}

.game-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, transform 0.2s;
}
.game-card:hover {
  border-color: var(--portal-accent-muted);
  transform: translateY(-2px);
}

.game-thumb {
  aspect-ratio: 16/9;
  position: relative;
  overflow: hidden;
}
.game-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.game-thumb .placeholder-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(168,85,247,0.05), rgba(168,85,247,0.1));
}

.game-card .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 0.2s;
}
.game-card:hover .play-overlay {
  opacity: 1;
}

.game-meta {
  padding: 0.75rem 1rem;
}

/* ═══════════════════════════════════════════════════════
   GAME DETAIL PAGE — screenshots, platform badges, downloads
   ═══════════════════════════════════════════════════════ */

/* Screenshot carousel */
.game-screenshot-main {
  transition: all 0.3s ease;
}
.game-screenshot-main img {
  transition: transform 0.3s ease;
}
.game-screenshot-zoomed {
  position: fixed !important;
  inset: 0 !important;
  z-index: 90 !important;
  border-radius: 0 !important;
  aspect-ratio: auto !important;
  background: #000;
}
.game-screenshot-zoomed img {
  object-fit: contain !important;
}

.game-screenshot-strip::-webkit-scrollbar {
  height: 4px;
}
.game-screenshot-strip::-webkit-scrollbar-track {
  background: transparent;
}
.game-screenshot-strip::-webkit-scrollbar-thumb {
  background: rgba(168, 85, 247, 0.3);
  border-radius: 2px;
}

/* Platform badges */
.badge-platform {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.1875rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
  letter-spacing: 0.01em;
}
.badge-platform-windows {
  background: rgba(0, 120, 215, 0.15);
  color: #4da6ff;
  border: 1px solid rgba(0, 120, 215, 0.25);
}
.badge-platform-macos {
  background: rgba(160, 160, 160, 0.12);
  color: #c0c0c0;
  border: 1px solid rgba(160, 160, 160, 0.2);
}
.badge-platform-linux {
  background: rgba(255, 165, 0, 0.12);
  color: #ffa500;
  border: 1px solid rgba(255, 165, 0, 0.2);
}
.badge-platform-web {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.25);
}
.badge-platform-android {
  background: rgba(61, 220, 132, 0.12);
  color: #3ddc84;
  border: 1px solid rgba(61, 220, 132, 0.2);
}
.badge-platform-ios {
  background: rgba(255, 255, 255, 0.08);
  color: #e0e0e0;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Download buttons hover */
.game-download-btn:hover {
  background: var(--color-bg-glass-hover) !important;
  border-color: rgba(168, 85, 247, 0.3) !important;
}

/* ═══════════════════════════════════════════════════════
   3D MODEL GRID — square thumbnail cards
   ═══════════════════════════════════════════════════════ */

.model3d-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}
@media (max-width: 639px) {
  .model3d-grid { grid-template-columns: repeat(2, 1fr); }
}

.model3d-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, transform 0.2s;
}
.model3d-card:hover {
  border-color: var(--portal-accent-muted);
  transform: translateY(-2px);
}

.model3d-thumb {
  aspect-ratio: 1/1;
  position: relative;
  overflow: hidden;
}
.model3d-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.model3d-thumb .placeholder-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(245,158,11,0.05), rgba(245,158,11,0.1));
}

.model3d-meta {
  padding: 0.625rem 0.75rem;
}

/* ═══════════════════════════════════════════════════════
   PORTAL NAVIGATION — mega-menu
   ═══════════════════════════════════════════════════════ */

.portal-mega-menu {
  background: rgba(17, 17, 24, 0.95);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  z-index: 60;
}
[data-theme="light"] .portal-mega-menu {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}
[data-theme="sepia"] .portal-mega-menu {
  background: rgba(244, 237, 223, 0.95);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.portal-menu-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-body);
  transition: all 0.15s;
  text-decoration: none;
}
.portal-menu-item:hover {
  background: rgba(0, 212, 170, 0.06);
  color: var(--color-accent);
}
.portal-menu-active {
  color: var(--color-accent);
  background: rgba(0, 212, 170, 0.06);
}

.portal-menu-icon {
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}
.portal-menu-icon svg {
  width: 0.875rem;
  height: 0.875rem;
}

/* ═══════════════════════════════════════════════════════
   PORTAL HUB — Three.js canvas + fallback grid
   ═══════════════════════════════════════════════════════ */

.portal-hub-section {
  position: relative;
  overflow: hidden;
}

#portal-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

#portal-labels {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.portal-label {
  position: absolute;
  pointer-events: auto;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-heading);
  background: rgba(10, 10, 15, 0.75);
  backdrop-filter: blur(8px);
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  text-decoration: none;
}
.portal-label:hover {
  background: rgba(0, 212, 170, 0.12);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translate(-50%, -50%) scale(1.05);
}
[data-theme="light"] .portal-label {
  background: rgba(255, 255, 255, 0.85);
}
[data-theme="sepia"] .portal-label {
  background: rgba(244, 237, 223, 0.85);
}

.hub-overlay {
  position: relative;
  z-index: 3;
  pointer-events: none;
}
.hub-overlay > * {
  pointer-events: auto;
}

/* Fallback grid — visible on mobile + reduced-motion */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}
@media (min-width: 640px) {
  .portal-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}
@media (min-width: 1024px) {
  .portal-grid { grid-template-columns: repeat(5, 1fr); }
}

.portal-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  border-radius: 1rem;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  text-align: center;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
}
.portal-card:hover {
  border-color: var(--portal-accent, var(--color-accent));
  background: var(--color-bg-glass-hover);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.portal-card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s;
}
.portal-card:hover .portal-card-icon {
  border-color: var(--portal-accent, var(--color-accent));
}
.portal-card-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}
.portal-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 0.25rem;
}
.portal-card p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Per-portal card accent colors */
.portal-card-books { --portal-accent: #D4A574; }
.portal-card-comics { --portal-accent: #FF6B9D; }
.portal-card-screenplays { --portal-accent: #FFD700; }
.portal-card-newspapers { --portal-accent: #C8B8A0; }
.portal-card-poetry { --portal-accent: #B8A9E8; }
.portal-card-articles { --portal-accent: #00D4AA; }
.portal-card-blog { --portal-accent: #FF7F6E; }
.portal-card-vlogs { --portal-accent: #FF4444; }
.portal-card-movies { --portal-accent: #E8B64A; }
.portal-card-streaming { --portal-accent: #4D9AFF; }
.portal-card-music { --portal-accent: #1DB954; }
.portal-card-podcasts { --portal-accent: #8B5CF6; }
.portal-card-software { --portal-accent: #22D3EE; }
.portal-card-games { --portal-accent: #A855F7; }
.portal-card-3d-models { --portal-accent: #F59E0B; }
.portal-card-textbooks { --portal-accent: #3B82F6; }
.portal-card-datasets { --portal-accent: #14B8A6; }

.portal-card-icon-books { color: #D4A574; background: rgba(212,165,116,0.08); }
.portal-card-icon-comics { color: #FF6B9D; background: rgba(255,107,157,0.08); }
.portal-card-icon-screenplays { color: #FFD700; background: rgba(255,215,0,0.08); }
.portal-card-icon-newspapers { color: #C8B8A0; background: rgba(200,184,160,0.08); }
.portal-card-icon-poetry { color: #B8A9E8; background: rgba(184,169,232,0.08); }
.portal-card-icon-articles { color: #00D4AA; background: rgba(0,212,170,0.08); }
.portal-card-icon-blog { color: #FF7F6E; background: rgba(255,127,110,0.08); }
.portal-card-icon-vlogs { color: #FF4444; background: rgba(255,68,68,0.08); }
.portal-card-icon-movies { color: #E8B64A; background: rgba(232,182,74,0.08); }
.portal-card-icon-streaming { color: #4D9AFF; background: rgba(77,154,255,0.08); }
.portal-card-icon-music { color: #1DB954; background: rgba(29,185,84,0.08); }
.portal-card-icon-podcasts { color: #8B5CF6; background: rgba(139,92,246,0.08); }
.portal-card-icon-software { color: #22D3EE; background: rgba(34,211,238,0.08); }
.portal-card-icon-games { color: #A855F7; background: rgba(168,85,247,0.08); }
.portal-card-icon-3d-models { color: #F59E0B; background: rgba(245,158,11,0.08); }
.portal-card-icon-textbooks { color: #3B82F6; background: rgba(59,130,246,0.08); }
.portal-card-icon-datasets { color: #14B8A6; background: rgba(20,184,166,0.08); }

/* ═══════════════════════════════════════════════════════
   LIGHT / SEPIA THEME OVERRIDES
   Hero backgrounds use softer starting colors in light mode.
   ═══════════════════════════════════════════════════════ */

[data-theme="light"] .portal-hero-bg,
[data-theme="sepia"] .portal-hero-bg {
  opacity: 0.3;
}

[data-theme="light"] .video-thumb .placeholder-bg,
[data-theme="light"] .music-art .placeholder-bg,
[data-theme="light"] .software-icon .placeholder-bg,
[data-theme="light"] .game-thumb .placeholder-bg,
[data-theme="light"] .model3d-thumb .placeholder-bg {
  background: linear-gradient(135deg, rgba(0,0,0,0.03), rgba(0,0,0,0.06));
}
[data-theme="sepia"] .video-thumb .placeholder-bg,
[data-theme="sepia"] .music-art .placeholder-bg,
[data-theme="sepia"] .software-icon .placeholder-bg,
[data-theme="sepia"] .game-thumb .placeholder-bg,
[data-theme="sepia"] .model3d-thumb .placeholder-bg {
  background: linear-gradient(135deg, rgba(139,105,20,0.04), rgba(139,105,20,0.08));
}

[data-theme="light"] .portal-card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}
[data-theme="sepia"] .portal-card:hover {
  box-shadow: 0 12px 40px rgba(100, 80, 50, 0.1);
}

[data-theme="light"] .play-icon svg {
  color: #FAFAFA;
}
[data-theme="light"] .play-icon {
  background: rgba(0, 0, 0, 0.8);
}

/* ─── Reduced motion / mobile: no Three.js ─── */
@media (prefers-reduced-motion: reduce) {
  #portal-canvas,
  #portal-labels { display: none !important; }
}
@media (max-width: 767px) {
  #portal-canvas,
  #portal-labels { display: none !important; }
}

/* When Three.js is active, hide fallback */
.hub-3d-active .portal-grid { display: none; }