/* ═══════════════════════════════════════════
   ChinaAutoHub — Common Frontend Styles
   ═══════════════════════════════════════════ */

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-0);
  color: var(--text-2);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, var(--container-padding));
}
.section { padding: clamp(3.5rem, 9vw, 6rem) 0; }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); border: none; }

/* Scroll Progress */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  z-index: 1200;
  background: var(--gradient-accent);
  box-shadow: 0 0 16px var(--accent-glow);
  will-change: width;
}

/* Global Background */
.global-bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.global-bg::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(230,57,70,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230,57,70,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}
.glow-orb { position: absolute; border-radius: 50%; filter: blur(120px); animation: orbPulse 8s ease-in-out infinite; animation-play-state: paused; }
.glow-orb.animated { animation-play-state: running; }
.glow-orb-1 { width: 640px; height: 640px; background: rgba(230,57,70,0.05); top: -15%; right: -8%; }
.glow-orb-2 { width: 480px; height: 480px; background: rgba(24,195,165,0.04); bottom: 6%; left: -10%; animation-delay: 2.2s; }
@keyframes orbPulse { 0%,100%{opacity:.55;transform:scale(1)} 50%{opacity:1;transform:scale(1.08)} }

/* Navigation */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
  background: rgba(10,10,10,0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
}
.nav.scrolled { border-bottom-color: var(--border); padding: .7rem 0; background: rgba(10,10,10,0.92); }
.nav .container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo {
  font-family: 'Instrument Serif', serif; font-size: 1.5rem; font-weight: 400;
  display: flex; align-items: center; gap: .6rem; color: var(--text-1);
}
.nav-logo-icon {
  width: 34px; height: 34px; background: var(--accent); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(230,57,70,0.3);
}
.nav-logo-icon svg { width: 18px; height: 18px; fill: white; }
.nav-links { display: flex; gap: 1.2rem; align-items: center; }
.nav-links a { font-size: .85rem; font-weight: 500; color: var(--text-2); transition: var(--transition); }
.nav-links a:hover { color: var(--text-1); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.2rem; border-radius: var(--radius);
  font-weight: 700; font-size: .9rem;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.btn::before {
  content: ''; position: absolute; top: 0; left: -120%;
  width: 90%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.24), transparent);
  transition: left .55s ease;
}
.btn:hover::before { left: 130%; }
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 25px var(--accent-glow); }
.btn-outline { border: 1px solid var(--border-light); color: var(--text-1); background: transparent; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(230,57,70,0.06); transform: translateY(-2px); }

/* Hero (категорийных страниц) */
.hero {
  min-height: 44vh; display: flex; align-items: flex-end;
  padding-top: 6rem; padding-bottom: 2.8rem;
  position: relative; overflow: hidden;
}
.hero h1 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  letter-spacing: -0.01em; color: var(--text-1);
  font-size: clamp(2.2rem, 4.8vw, 3.2rem); line-height: 1.05;
}
.hero p { margin-top: 1rem; max-width: 720px; color: var(--text-2); font-size: 1rem; line-height: 1.75; }

/* Catalog Grid & Cards */
.catalog-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
}
.card-3d {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-xl); overflow: hidden;
  transition: transform .4s ease, box-shadow .4s ease, border-color .3s;
  cursor: pointer; position: relative;
  transform-style: preserve-3d;
}
.card-3d:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); }
.card-3d:hover { will-change: transform; }
.card-3d .card-shine {
  position: absolute; inset: 0; opacity: 0;
  transition: opacity .3s; pointer-events: none;
  z-index: 10; border-radius: inherit;
}
.card-img {
  aspect-ratio: 16 / 10; background: var(--bg-0);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.card-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, var(--bg-2) 0%, transparent 50%);
}
.card-img img { width: 100%; height: 100%; object-fit: cover; position: relative; z-index: 1; }
.card-img-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  opacity: .18;
}
.badge {
  position: absolute; top: .8rem; left: .8rem;
  padding: .25rem .7rem; border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace; font-size: .65rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  z-index: 2; background: var(--accent); color: #fff;
}
.card-body { padding: 1.3rem; }
.card-brand {
  font-family: 'JetBrains Mono', monospace; font-size: .7rem;
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent); font-weight: 700; margin-bottom: .25rem;
}
.card-name {
  font-family: 'Instrument Serif', serif; font-size: 1.3rem;
  margin-bottom: .7rem; color: var(--text-1);
}
.card-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 1rem; border-top: 1px solid var(--border);
}
.card-price { font-size: .75rem; color: var(--text-3); }
.card-price strong {
  display: block; font-size: 1.05rem; color: var(--text-1);
  font-weight: 800; margin-top: .15rem;
  font-family: 'JetBrains Mono', monospace;
}
.card-price .price-request {
  font-family: inherit; font-size: inherit;
  font-weight: 600; color: var(--text-2); font-style: italic;
}
.card-link {
  font-weight: 700; font-size: .82rem; color: var(--accent);
  display: flex; align-items: center; gap: .3rem; transition: var(--transition);
}
.card-3d:hover .card-link { gap: .6rem; }

/* Empty State */
.empty {
  margin-top: 1.2rem;
  border: 1px dashed var(--border); border-radius: var(--radius-xl);
  padding: 2.2rem 1.4rem;
  background: rgba(17,17,17,0.35);
  text-align: center; color: var(--text-3);
}
.empty h3 {
  font-family: 'Instrument Serif', serif; font-weight: 400;
  color: var(--text-1); font-size: 1.6rem; margin-bottom: .4rem;
}
.empty p { color: var(--text-2); max-width: 560px; margin: 0 auto; }

/* Reveal Animation */
.fade-in, .reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .8s cubic-bezier(.4,0,.2,1), transform .8s cubic-bezier(.4,0,.2,1);
}
.fade-in.visible, .reveal.visible { opacity: 1; transform: translateY(0); }

/* Pagination */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: .4rem; margin-top: 2.5rem; flex-wrap: wrap;
}
.pagination-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 .6rem;
  border-radius: var(--radius); border: 1px solid var(--border);
  background: transparent; color: var(--text-2);
  font-family: 'JetBrains Mono', monospace; font-size: .82rem;
  font-weight: 600; cursor: pointer; transition: all .25s ease;
  user-select: none;
}
.pagination-btn:hover:not(:disabled):not(.active) {
  border-color: var(--accent); color: var(--accent);
  background: rgba(230,57,70,.06);
}
.pagination-btn.active {
  background: var(--accent); border-color: var(--accent);
  color: #fff; box-shadow: 0 2px 12px var(--accent-glow);
}
.pagination-btn:disabled { opacity: .35; cursor: not-allowed; }
.pagination-btn svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; }
.pagination-ellipsis {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 40px; color: var(--text-3); font-size: .85rem;
  user-select: none;
}
.pagination-info {
  text-align: center; margin-top: .8rem;
  font-size: .8rem; color: var(--text-3);
}

/* Mobile Filters Toggle */
.filters-toggle {
  display: none; width: 100%;
  padding: .85rem 1.2rem;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); color: var(--text-1);
  font-size: .9rem; font-weight: 600;
  cursor: pointer; align-items: center; justify-content: space-between;
  transition: all .25s ease; margin-bottom: .75rem;
}
.filters-toggle:hover { border-color: var(--accent); }
.filters-toggle svg {
  width: 18px; height: 18px; stroke: currentColor;
  fill: none; stroke-width: 2; transition: transform .3s ease;
}
.filters-toggle.open svg { transform: rotate(180deg); }
.filters-toggle .filters-count {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px; padding: 0 .45rem;
  background: var(--accent); color: #fff;
  font-size: .7rem; font-weight: 700;
  border-radius: 11px; margin-left: .5rem;
}
.filters-toggle .filters-count:empty { display: none; }
@media (max-width: 980px) {
  .filters-toggle { display: flex; }
  .filters.collapsed { display: none; }
}

/* Footer */
.footer {
  background: var(--bg-0); border-top: 1px solid var(--border);
  padding: 3rem var(--container-padding);
}
.footer-inner {
  max-width: var(--container-max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-copy { font-size: .85rem; color: var(--text-3); }
.footer-links { display: flex; gap: 2rem; }
.footer-links a { font-size: .85rem; color: var(--text-3); transition: color .3s; }
.footer-links a:hover { color: var(--text-1); }

/* ═══ A11Y ═══ */
.skip-link {
  position: fixed; top: -100%; left: 1rem; z-index: 9999;
  padding: .75rem 1.5rem; background: var(--accent); color: #fff;
  font-weight: 700; font-size: .9rem;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none; transition: top .2s ease;
}
.skip-link:focus { top: 0; outline: 3px solid var(--accent-hover); outline-offset: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
:focus:not(:focus-visible) { outline: none; }
.card-3d:focus-visible, .product-card:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 4px;
  border-color: var(--accent); box-shadow: var(--shadow-lg);
}
.pagination-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Responsive */
@media (max-width: 520px) {
  .catalog-grid { grid-template-columns: 1fr; }
  .pagination { gap: .25rem; }
  .pagination-btn { min-width: 36px; height: 36px; font-size: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal, .fade-in { opacity: 1; transform: none; }
  .glow-orb { animation: none; }
}

@media (forced-colors: active) {
  .btn-primary, .btn-outline, .badge, .pagination-btn.active { border: 2px solid ButtonText; }
  .card-3d, .product-card { border: 1px solid ButtonText; }
}