* { box-sizing: border-box; }
  body { font-family: 'Inter', sans-serif; background: #fff8f7; color: #2a1614; }
  .font-grotesk { font-family: 'Hanken Grotesk', sans-serif; }
  .font-mono { font-family: 'JetBrains Mono', monospace; }
  .material-symbols-outlined { font-variation-settings:'FILL' 0,'wght' 400,'GRAD' 0,'opsz' 24; vertical-align: middle; line-height: 1; }
  .fill-icon { font-variation-settings:'FILL' 1,'wght' 400,'GRAD' 0,'opsz' 24; }

  /* Page transitions */
  .page { display: none; }
  .page.active { display: block; }

  /* Grid dot pattern */
  .dot-grid {
    background-image: radial-gradient(circle, #8C8C8C 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.06;
  }

  /* Red underline accent */
  .red-rule { border-left: 4px solid #b7000c; padding-left: 1.25rem; }

  /* Tag chip */
  .chip { font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; }

  /* Category card hover */
  .cat-card { border: 1px solid #e5e5e5; transition: border-color 0.2s, transform 0.2s; cursor: pointer; }
  .cat-card:hover { border-color: #b7000c; transform: translateY(-2px); }

  /* Model card */
  .model-card { position: relative; overflow: hidden; cursor: pointer; }
  .model-card img { transition: transform 0.5s; }
  .model-card:hover img { transform: scale(1.04); }
  .model-card .overlay { background: linear-gradient(to top, rgba(18,18,18,0.92) 0%, rgba(18,18,18,0.3) 60%, transparent 100%); }

  /* Scroll reveal */
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  /* WhatsApp floating */
  .wa-float { position: fixed; bottom: 24px; right: 24px; z-index: 999; background: #25D366; border-radius: 50%; width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(37,211,102,0.45); transition: transform 0.2s; }
  .wa-float:hover { transform: scale(1.1); }
  @media (max-width: 767px) {
    .wa-float { display: none; }
    body { padding-bottom: 60px; }
  }

  /* ── Barra de navegación inferior (shortcuts, solo móvil) ──────────────── */
  .mobile-bottom-nav { display: none; box-shadow: 0 -2px 12px rgba(0,0,0,0.15); }
  @media (max-width: 767px) {
    .mobile-bottom-nav { display: flex; }
  }
  .bn-item { color: #8C8C8C; text-decoration: none; transition: color 0.15s; }
  .bn-item.active { color: #ffffff; }
  .bn-item.active .material-symbols-outlined { font-variation-settings: 'FILL' 1; color: #b7000c; }
  .bn-item.active span:last-child { color: #b7000c; }
  .bn-wa span:last-child { color: #25D366 !important; }

  /* Nav link active */
  .nav-link { color: #5f5e5e; font-weight: 500; font-size: 14px; transition: color 0.2s; text-decoration: none; letter-spacing: 0.01em; }
  .nav-link:hover, .nav-link.active { color: #b7000c; }
  .nav-link.active { font-weight: 700; border-bottom: 2px solid #b7000c; padding-bottom: 2px; }

  /* Mobile menu */
  #mobile-menu { display: none; }
  #mobile-menu.open { display: block; }

  /* Stats number */
  .stat-num { font-family: 'Hanken Grotesk', sans-serif; font-size: 48px; font-weight: 800; line-height: 1; letter-spacing: -0.02em; color: #b7000c; }

  /* Progress bar */
  @keyframes fillBar { from { width: 0; } to { width: var(--target-w); } }
  .progress-fill { animation: fillBar 1.2s ease forwards; }

  /* Tag accent */
  .tag-red { background: #b7000c; color: #fff; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 10px; }

  /* In stock badge */
  .badge-stock { background: #e8f5ee; color: #00873D; font-family: 'JetBrains Mono', monospace; font-size: 10px; font-weight: 500; padding: 2px 8px; border-radius: 2px; }
  .badge-import { background: #fff3e0; color: #e65100; font-family: 'JetBrains Mono', monospace; font-size: 10px; font-weight: 500; padding: 2px 8px; border-radius: 2px; }

  /* Smooth scroll */
  html { scroll-behavior: smooth; }

  /* Table zebra */
  tbody tr:nth-child(even) { background: #F4F4F6; }

  /* ── Ticker vertical de marcas de repuestos ─────────────────────────────── */
  .brand-ticker-mask {
    height: 260px;
    overflow: hidden;
    position: relative;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 18%, black 82%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 18%, black 82%, transparent 100%);
  }
  .brand-ticker-track {
    display: flex;
    flex-direction: column;
    animation: brandTickerScroll 16s linear infinite;
  }
  .brand-ticker-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.45);
    text-align: center;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: color 0.2s;
  }
  .brand-ticker-item:hover { color: #ffffff; }
  @keyframes brandTickerScroll {
    from { transform: translateY(0); }
    to { transform: translateY(-50%); }
  }
  @media (prefers-reduced-motion: reduce) {
    .brand-ticker-track { animation: none; }
  }