/* ============================================================
   Fondos IA — Sistema de diseño
   Dark Minimalist · Inter · Grid 16:9
   ============================================================ */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url('/assets/fonts/inter-300.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/assets/fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/inter-600.woff2') format('woff2');
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: clip;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ── Tokens ── */
:root {
  --bg:           #0a0a0a;
  --bg-card:      #141414;
  --bg-hover:     #1a1a1a;
  --bg-glass:     rgba(10, 10, 10, 0.80);
  --ink:          rgba(255, 255, 255, 0.95);
  --ink-muted:    rgba(255, 255, 255, 0.70);
  --ink-faint:    rgba(255, 255, 255, 0.50);
  --accent:       #ffffff;
  --accent-dim:   rgba(255, 255, 255, 0.12);
  --border:       rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.18);
  --overlay:      rgba(0, 0, 0, 0.55);
  --blur:         blur(16px) saturate(160%);
  --radius:       8px;
  --radius-sm:    4px;
  --t:            250ms cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:       150ms ease;
  --nav-h:        56px;
  --gutter:       20px;
  --col-gap:      4px;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--ink-faint); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-muted); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-logo {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo .logo-4k  { font-weight: 700; color: #e53935; opacity: 1; }
.nav-logo .logo-tld { font-weight: 300; opacity: 0.6; }

/* Buscador */
.nav-search {
  flex: 1;
  max-width: 360px;
  position: relative;
}
.nav-search input {
  width: 100%;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 7px 14px 7px 36px;
  font-size: 13px;
  color: var(--ink);
  outline: none;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.nav-search input::placeholder { color: var(--ink-muted); }
.nav-search input:focus { border-color: var(--border-hover); background: rgba(255,255,255,0.08); }
.nav-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.4;
  pointer-events: none;
}

.nav-spacer { flex: 1; }

/* Botones nav derecha */
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--ink-muted);
  transition: color var(--t-fast), background var(--t-fast);
  white-space: nowrap;
}
.nav-btn:hover { color: var(--ink); background: var(--accent-dim); }
.nav-btn.primary {
  background: var(--accent);
  color: #000;
  font-weight: 500;
}
.nav-btn.primary:hover { background: rgba(255,255,255,0.85); }

/* ============================================================
   FILTROS
   ============================================================ */
.filters {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: var(--nav-h);
  z-index: 90;
}

/* Cada fila de filtros es su propio scroll independiente */
.filters-row {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  height: 44px;
  -webkit-overflow-scrolling: touch;
}
.filters-row::-webkit-scrollbar { display: none; }
/* Separador visual entre fila de categorías y fila de colores */
.filters-row--meta {
  border-top: 1px solid var(--border);
  height: 40px;
}

.filter-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-muted);
  border: 1px solid var(--border);
  white-space: nowrap;
  transition: all var(--t-fast);
  cursor: pointer;
  background: none;
  flex-shrink: 0;
}
.filter-chip:hover { color: var(--ink); border-color: var(--border-hover); }
.filter-chip.active { color: #000; background: var(--accent); border-color: var(--accent); }

/* Separador entre grupos de filtros */
.filter-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

/* Círculos de color (fila 2) — sin texto, con tooltip nativo */
.filter-color {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--c);           /* --c definido en style= inline */
  border: 2px solid transparent;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.18);
  transition: box-shadow 120ms, transform 120ms, border-color 120ms;
  display: block;
}
.filter-color:hover {
  box-shadow: 0 0 0 2px rgba(255,255,255,0.55);
  transform: scale(1.15);
}
.filter-color.active {
  border-color: #fff;
  box-shadow: 0 0 0 2px #fff;
}

/* Chips pequeños para moods */
.filter-chip--sm {
  font-size: 11px;
  padding: 3px 10px;
}

/* ============================================================
   GALERÍA (grid 16:9)
   ============================================================ */
.gallery {
  max-width: 1600px;
  margin: 0 auto;
  padding: var(--gutter);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--col-gap);
}

/* Card */
.card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  cursor: pointer;
}
.card-img-link {
  position: absolute;
  inset: 0;
  display: block;
}
.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-user-drag: none;
  user-select: none;
}
.card:hover .card-img { transform: scale(1.04); }

/* Overlay en hover */
.card-overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 14px;
  opacity: 0;
  transition: opacity var(--t);
  pointer-events: none;
}
.card-overlay > * { pointer-events: auto; }
.card:hover .card-overlay { opacity: 1; }

/* Título en overlay */
.card-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Botones de descarga */
.card-downloads {
  display: flex;
  gap: 6px;
}
.dl-btn {
  flex: 1;
  padding: 6px 0;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  background: rgba(255, 255, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
  transition: background var(--t-fast);
  cursor: pointer;
  letter-spacing: 0.03em;
}
.dl-btn:hover { background: rgba(255,255,255,0.28); }
.dl-btn.dl-4k { background: rgba(255,255,255,0.22); color: #fff; }
.dl-btn.dl-4k:hover { background: rgba(255,255,255,0.35); }

/* Badge IA */
.card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 7px;
  border-radius: 20px;
  background: rgba(0,0,0,0.60);
  color: rgba(255,255,255,0.70);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity var(--t);
}
.card:hover .card-badge { opacity: 1; }

/* Favorito */
.card-fav {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--t), background var(--t-fast);
  cursor: pointer;
  color: rgba(255,255,255,0.70);
}
.card:hover .card-fav { opacity: 1; }
.card-fav:hover { background: rgba(255,255,255,0.15); color: #fff; }
.card-fav.active { opacity: 1; color: #ff6b6b; background: rgba(255,107,107,0.15); border-color: rgba(255,107,107,0.3); }

/* ============================================================
   HEADER DE SECCIÓN (categoría activa)
   ============================================================ */
.section-header {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px var(--gutter) 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}
.section-count {
  font-size: 13px;
  color: var(--ink-muted);
}

/* Botón "ver más" / random */
.btn-ghost {
  padding: 7px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-muted);
  border: 1px solid var(--border);
  transition: all var(--t-fast);
  cursor: pointer;
  background: none;
}
.btn-ghost:hover { color: var(--ink); border-color: var(--border-hover); background: var(--accent-dim); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  margin-top: 60px;
  border-top: 1px solid var(--border);
  padding: 24px var(--gutter);
}
.footer-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-note {
  font-size: 12px;
  color: var(--ink-muted);
}
.footer-ai-badge {
  font-size: 11px;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-links { display: flex; gap: 8px; }
.footer-links a {
  font-size: 12px;
  color: var(--ink-muted);
  transition: color var(--t-fast);
  padding: 12px 10px;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.footer-links a:hover { color: var(--ink); }
.footer-cats {
  border-top: 1px solid var(--border);
  padding: 16px var(--gutter) 0;
}
.footer-cats-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.footer-cats-label {
  font-size: 11px;
  color: var(--ink-faint);
  margin-right: 4px;
}
.footer-cats a {
  font-size: 11px;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: color var(--t-fast), border-color var(--t-fast);
  min-height: 28px;
  display: inline-flex;
  align-items: center;
}
.footer-cats a:hover { color: var(--ink); border-color: rgba(255,255,255,.2); }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty {
  grid-column: 1 / -1;
  padding: 80px 20px;
  text-align: center;
}
.empty-icon { font-size: 40px; margin-bottom: 16px; opacity: 0.3; }
.empty-text { font-size: 14px; color: var(--ink-muted); }

/* ============================================================
   SKELETON (carga)
   ============================================================ */
.card-skeleton {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  position: relative;
}
.card-skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.04) 50%, transparent 100%);
  animation: shimmer 1.8s infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ============================================================
   TOAST (notificación descarga)
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(255,255,255,0.95);
  color: #000;
  font-size: 13px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms, transform 200ms;
  white-space: nowrap;
  z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================
   GALLERY LABELS (Últimas novedades / Más populares)
   ============================================================ */
.gallery-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 8px;
}

/* ============================================================
   CARD — DESCARGAS BADGE (esquina inf-izq, solo si >= 10)
   ============================================================ */
.card-likes {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,0.80);
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border-radius: 20px;
  padding: 3px 9px;
  pointer-events: none;
  transition: opacity var(--t);
}
.card:hover .card-likes { opacity: 0; }

/* ============================================================
   SUPERADMIN CONTROLS (solo visible en .is-superadmin)
   ============================================================ */
.sa-controls {
  display: none;
  position: absolute;
  top: 10px;
  right: 10px;
  flex-direction: column;
  gap: 4px;
  z-index: 20;
}
.is-superadmin .card:hover .sa-controls { display: flex; }
/* Ocultar badge IA cuando sa-controls visible */
.is-superadmin .card:hover .card-badge { display: none; }

.sa-btn {
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: background var(--t-fast);
  white-space: nowrap;
}
.sa-likes {
  background: rgba(255,107,107,0.30);
  color: #ff9f9f;
  border-color: rgba(255,107,107,0.40);
}
.sa-likes:hover { background: rgba(255,107,107,0.50); }

.sa-delete {
  background: rgba(0,0,0,0.55);
  color: rgba(255,255,255,0.70);
}
.sa-delete:hover { background: rgba(220,38,38,0.55); color: #fff; }

/* ============================================================
   CARD — TITLE LINK (para páginas individuales)
   ============================================================ */
a.card-title {
  display: block;
  color: var(--ink);
  text-decoration: none;
}
a.card-title:hover { text-decoration: underline; }

/* ============================================================
   PÁGINA INDIVIDUAL DE WALLPAPER
   ============================================================ */
.wp-hero {
  background: #000;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 80vh;
  overflow: hidden;
}
.wp-hero-img {
  display: block;
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
}

.wp-info {
  border-bottom: 1px solid var(--border);
}
.wp-info-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px var(--gutter);
}

.wp-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.wp-cat-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--accent-dim);
  color: var(--ink-muted);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.wp-cat-badge:hover { color: var(--ink); border-color: var(--border-hover); }

.wp-res-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,.08);
  color: var(--ink-muted);
}
.wp-res-4k  { background: rgba(255,255,255,.15); color: var(--ink); }
.wp-res-ai  { background: rgba(139,92,246,.2); color: #c4b5fd; border: 1px solid rgba(139,92,246,.3); }

.wp-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.2;
}
.wp-desc {
  font-size: 14px;
  color: var(--ink-muted);
  margin-bottom: 20px;
  line-height: 1.6;
  max-width: 640px;
}

.wp-downloads {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.wp-dl-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 24px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.18);
  color: var(--ink);
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast);
  min-width: 100px;
}
.wp-dl-btn:hover { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.35); }
.wp-dl-4k  { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.30); }
.wp-dl-4k:hover { background: rgba(255,255,255,.28); }
.wp-dl-disabled { opacity: .35; cursor: not-allowed; }
.wp-dl-edit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 24px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.10);
  border: 1px dashed rgba(255,255,255,.18);
  color: inherit;
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast), opacity var(--t-fast);
  min-width: 100px;
  text-decoration: none;
  opacity: .65;
}
.wp-dl-edit:hover { opacity:1; background:rgba(255,255,255,.18); border-color:rgba(255,255,255,.35); }
.wp-dl-res  { font-size: 14px; font-weight: 700; }
.wp-dl-size { font-size: 11px; color: var(--ink-muted); }

.wp-tags { padding: 16px 0 8px; }
.wp-tags-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.wp-tag {
  font-size: 12px;
  color: var(--ink-muted);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast);
}
.wp-tag:hover { background: rgba(255,255,255,.12); color: var(--ink); }

.wp-related { padding: 32px 0 60px; }
.wp-related-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.wp-related-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.breadcrumb-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 36px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-muted);
}
.breadcrumb-inner a { color: var(--ink-muted); transition: color var(--t-fast); }
.breadcrumb-inner a:hover { color: var(--ink); }
.breadcrumb-inner span:last-child { color: var(--ink); }

/* ============================================================
   INTERNAL LINKS (pie de página de categoría)
   ============================================================ */
.internal-links {
  border-top: 1px solid var(--border);
  margin-top: 48px;
}
.internal-links-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px var(--gutter);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.internal-links-label {
  font-size: 12px;
  color: var(--ink-muted);
  flex-shrink: 0;
  margin-right: 4px;
}

/* ============================================================
   INFINITE SCROLL SPINNER
   ============================================================ */
.scroll-spinner {
  text-align: center;
  padding: 32px 0 48px;
}
.scroll-spinner::after {
  content: '';
  display: inline-block;
  width: 26px;
  height: 26px;
  border: 2px solid var(--border);
  border-top-color: var(--ink-muted);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1400px) {
  .gallery-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 1100px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .nav-search { max-width: 240px; }
}
@media (max-width: 720px) {
  :root { --gutter: 12px; --col-gap: 3px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-search { display: none; }
  .card-downloads { gap: 4px; }
  .dl-btn { font-size: 10px; padding: 5px 0; }
  .section-header { padding-top: 16px; }
}
@media (max-width: 420px) {
  .gallery-grid { grid-template-columns: repeat(1, 1fr); }
}

/* ============================================================
   CAT INTRO (página /4k y categorías)
   ============================================================ */
.cat-intro {
  max-width: 1600px;
  margin: 0 auto;
  padding: 16px var(--gutter) 0;
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
}
.cat-intro strong { color: var(--ink); }