*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg-dark: #0a0c10; --bg-card: #12151c; --bg-card-hover: #181c26;
  --accent: #f59e0b; --accent-dim: #d97706; --accent-glow: rgba(245,158,11,0.15);
  --text-primary: #f1f5f9; --text-secondary: #94a3b8; --text-muted: #64748b;
  --border: #1e293b; --border-light: #2d3748; --success: #22c55e; --error: #ef4444;
  --gradient-start: #f59e0b; --gradient-end: #ef4444;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark); color: var(--text-primary); line-height: 1.6; min-height: 100vh;
}
h1,h2,h3,h4 { font-family: 'Space Grotesk', sans-serif; }
a { color: var(--accent); text-decoration: none; }

/* NAV */
nav { position: fixed; top: 0; width: 100%; z-index: 100; background: rgba(10,12,16,0.85); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 1rem 2rem; }
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: 'Space Grotesk', sans-serif; font-size: 1.3rem; font-weight: 700; color: var(--text-primary); display: flex; align-items: center; gap: 0.5rem; text-decoration: none; }
.logo-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end)); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; }
.nav-tag { font-size: 0.7rem; color: var(--accent); font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }

/* HERO */
.hero { padding: 6rem 2rem 4rem; text-align: center; background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(245,158,11,0.06) 0%, transparent 70%); }
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.1; margin-bottom: 0.75rem; }
.hero h1 span { background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { color: var(--text-secondary); font-size: 1.1rem; max-width: 500px; margin: 0 auto 2.5rem; }

/* SEARCH BAR */
.search-wrap { max-width: 680px; margin: 0 auto; }
.search-bar { display: flex; gap: 0.5rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 0.5rem; }
.search-bar:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-bar input {
  flex: 1; background: none; border: none; outline: none; color: var(--text-primary); font-size: 1rem;
  padding: 0.6rem 0.75rem; font-family: inherit;
}
.search-bar input::placeholder { color: var(--text-muted); }
.btn-search {
  background: linear-gradient(135deg, var(--gradient-start), var(--accent-dim)); color: #0a0c10;
  border: none; border-radius: 8px; padding: 0.6rem 1.5rem; font-weight: 700; font-size: 0.9rem;
  cursor: pointer; transition: opacity 0.15s; font-family: inherit; white-space: nowrap;
}
.btn-search:hover { opacity: 0.85; }

/* VEHICLE SELECTOR */
.vehicle-selector { max-width: 680px; margin: 1.25rem auto 0; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.vehicle-selector label { color: var(--text-muted); font-size: 0.85rem; white-space: nowrap; }
.vs-select {
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary);
  border-radius: 8px; padding: 0.4rem 0.6rem; font-size: 0.85rem; font-family: inherit;
  cursor: pointer; outline: none; min-width: 100px;
}
.vs-select:focus { border-color: var(--accent); }
.vs-sep { color: var(--text-muted); font-size: 0.75rem; }
.vehicle-clear { color: var(--text-muted); font-size: 0.8rem; cursor: pointer; margin-left: 0.5rem; }
.vehicle-clear:hover { color: var(--accent); }

/* CATEGORY TABS */
.cat-bar { max-width: 1200px; margin: 0 auto; padding: 1.5rem 2rem; display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.cat-btn {
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-secondary);
  border-radius: 8px; padding: 0.4rem 1rem; font-size: 0.85rem; cursor: pointer; transition: all 0.15s;
  font-family: inherit; text-decoration: none; display: inline-block;
}
.cat-btn:hover, .cat-btn.active { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

/* PARTS GRID */
.results-area { max-width: 1200px; margin: 0 auto; padding: 0 2rem 4rem; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.section-head h2 { font-size: 1.4rem; font-weight: 700; }
.hits-count { color: var(--text-muted); font-size: 0.85rem; }
.parts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.part-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; transition: border-color 0.15s, transform 0.15s; display: flex; flex-direction: column; text-decoration: none; color: inherit;
}
.part-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.part-img { width: 100%; height: 160px; object-fit: cover; background: var(--bg-card-hover); }
.part-img-placeholder { width: 100%; height: 160px; background: var(--bg-card-hover); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 0.75rem; }
.part-body { padding: 1rem; flex: 1; display: flex; flex-direction: column; gap: 0.4rem; }
.part-cat { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); font-weight: 600; }
.part-name { font-size: 0.95rem; font-weight: 600; line-height: 1.3; color: var(--text-primary); }
.part-sku { font-size: 0.75rem; color: var(--text-muted); }
.part-price { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-top: auto; padding-top: 0.5rem; }
.part-stock { font-size: 0.75rem; }
.stock-yes { color: var(--success); }
.stock-no { color: var(--error); }

/* DETAIL PAGE */
.detail-wrap { max-width: 900px; margin: 0 auto; padding: 6rem 2rem 4rem; }
.detail-header { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.detail-img { width: 100%; border-radius: 12px; background: var(--bg-card); object-fit: cover; max-height: 400px; }
.detail-info h1 { font-size: 1.8rem; margin-bottom: 0.5rem; }
.detail-sku { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1rem; }
.detail-price { font-size: 2rem; font-weight: 800; margin-bottom: 1rem; }
.detail-stock { font-size: 0.9rem; margin-bottom: 1.5rem; }
.detail-desc { color: var(--text-secondary); line-height: 1.7; margin-bottom: 1.5rem; }
.detail-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.tag { background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; padding: 0.3rem 0.75rem; font-size: 0.8rem; color: var(--text-secondary); }
.tag-label { font-weight: 600; color: var(--text-primary); }

/* FITMENT TABLE */
.fitment-section { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.fitment-section h3 { margin-bottom: 1rem; font-size: 1.2rem; }
.vehicles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.5rem; }
.vehicle-chip { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 0.5rem 0.75rem; }
.vehicle-chip strong { font-size: 0.85rem; }
.vehicle-chip span { display: block; font-size: 0.75rem; color: var(--text-muted); }

/* RELATED */
.related-section { margin-top: 3rem; }
.related-section h3 { margin-bottom: 1rem; }

/* 404 */
.not-found { text-align: center; padding: 8rem 2rem; }
.not-found h1 { font-size: 5rem; background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.not-found p { color: var(--text-secondary); margin: 1rem 0 2rem; }

/* NO RESULTS */
.no-results { text-align: center; padding: 4rem 2rem; color: var(--text-muted); }

/* FOOTER */
footer { border-top: 1px solid var(--border); padding: 2rem; margin-top: 4rem; text-align: center; color: var(--text-muted); font-size: 0.8rem; }
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

/* MOBILE */
@media (max-width: 640px) {
  .detail-header { grid-template-columns: 1fr; }
  .parts-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .vehicle-selector { flex-direction: column; align-items: stretch; }
}