:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --blue: #0369a1;
  --blue-dark: #075985;
  --dark: #020617;
  --light: #f8fafc;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
}
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.topbar { background: var(--dark); color: #fff; font-size: 13px; }
.topbar-inner, .header-inner, .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 18px; }
.topbar-inner { padding: 10px 0; }
.topbar-links { color: #cbd5e1; }
.header { position: sticky; top: 0; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); z-index: 50; }
.header-inner { padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 14px; }
.logo { height: 58px; width: auto; }
.logo.small { height: 42px; }
.brand-title { font-weight: 900; letter-spacing: .04em; }
.brand-subtitle { color: var(--blue); font-size: 12px; text-transform: uppercase; letter-spacing: .22em; font-weight: 700; }
.nav { display: flex; gap: 18px; font-size: 14px; }
.nav a { color: var(--text); text-decoration: none; }
.nav a:hover { color: var(--blue); }
.hero { position: relative; min-height: 620px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2,6,23,.92), rgba(15,23,42,.68), rgba(15,23,42,.28)); }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.35fr .8fr; gap: 30px; padding: 54px 0; align-items: center; }
.hero-copy { color: #fff; }
.hero-copy h1 { font-size: clamp(36px, 5vw, 62px); line-height: 1.05; margin: 16px 0; max-width: 900px; }
.hero-copy p { max-width: 760px; font-size: 18px; color: #e2e8f0; }
.pill, .match-pill { display: inline-flex; align-items: center; border-radius: 999px; padding: 8px 14px; font-weight: 700; }
.pill { background: #0284c7; color: #fff; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; max-width: 760px; }
.stat { background: rgba(255,255,255,.12); border-radius: 18px; padding: 18px; backdrop-filter: blur(4px); }
.stat strong { display: block; font-size: 28px; }
.stat span { color: #dbeafe; font-size: 14px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 28px; box-shadow: 0 12px 34px rgba(15,23,42,.08); }
.finder { padding: 24px; }
.finder h3, .quote-cart h3, .quote-form-card h3 { margin-top: 0; font-size: 28px; }
label { display: block; font-size: 14px; font-weight: 700; margin: 14px 0 8px; }
input, select, textarea {
  width: 100%; padding: 14px 16px; border-radius: 16px; border: 1px solid var(--line); font: inherit;
}
textarea { min-height: 110px; resize: vertical; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 16px; padding: 13px 18px; border: 1px solid transparent; cursor: pointer; font-weight: 700; font: inherit;
}
.btn-block { width: 100%; margin-top: 14px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-outline { background: #fff; color: var(--text); border-color: var(--line); }
.finder-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.finder-box { background: var(--light); border-radius: 16px; padding: 14px; text-align: center; font-size: 13px; font-weight: 700; }
.section { padding: 56px 0; }
.section-alt { background: var(--light); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 24px; }
.eyebrow { color: var(--blue); text-transform: uppercase; letter-spacing: .2em; font-size: 12px; font-weight: 800; }
.eyebrow.light { color: #7dd3fc; }
h2 { margin: 8px 0 0; font-size: 38px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.category-card { display: flex; justify-content: space-between; align-items: center; padding: 22px; border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.category-card strong { display: block; font-size: 20px; }
.diagram-layout, .quote-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; }
.diagram-card, .diagram-side, .quote-form-card { padding: 24px; }
.diagram-shell { border: 1px solid var(--line); border-radius: 28px; background: #fff; padding: 18px; }
.diagram-truck { position: relative; height: 340px; border-radius: 28px; background: linear-gradient(180deg, #f8fafc, #f1f5f9); overflow: hidden; }
.wheel { position: absolute; width: 64px; height: 64px; border-radius: 50%; border: 6px solid #475569; background: #cbd5e1; top: 70%; }
.wheel.left { left: 9%; }
.wheel.right { right: 10%; }
.tank { position: absolute; left: 16%; top: 40%; width: 58%; height: 92px; border-radius: 24px; border: 2px solid #bae6fd; background: #e0f2fe; }
.cab { position: absolute; left: 69%; top: 47%; width: 14%; height: 72px; border-radius: 22px; border: 2px solid #cbd5e1; background: #e2e8f0; }
.hotspot {
  position: absolute; border: 0; border-radius: 999px; padding: 9px 14px; background: #fff; box-shadow: 0 4px 12px rgba(15,23,42,.14); font-weight: 700; cursor: pointer;
}
.hotspot.active, .zone-btn.active { background: var(--blue); color: #fff; }
.zone-btn {
  width: 100%; text-align: left; display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--line); background: #fff; border-radius: 16px; padding: 14px 16px; margin-bottom: 10px; cursor: pointer; font-weight: 700;
}
.catalog-layout { display: grid; grid-template-columns: 1fr 330px; gap: 22px; align-items: start; }
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.product-card { padding: 22px; }
.product-head { display: flex; justify-content: space-between; gap: 12px; }
.badge { display: inline-flex; border-radius: 999px; padding: 7px 12px; background: var(--dark); color: #fff; font-size: 12px; font-weight: 700; }
.specs { margin-top: 16px; background: var(--light); border-radius: 18px; padding: 14px; font-size: 14px; }
.spec-row { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.spec-row:last-child { border-bottom: 0; }
.product-actions { margin-top: 16px; display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.quote-cart { padding: 22px; }
.sticky-card { position: sticky; top: 90px; }
.cart-item { border: 1px solid var(--line); border-radius: 16px; padding: 12px; margin-bottom: 10px; }
.cart-item-head { display: flex; justify-content: space-between; gap: 10px; font-weight: 700; }
.cart-item small { color: var(--muted); }
.cart-controls { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.cart-controls button { border: 1px solid var(--line); background: #fff; border-radius: 10px; width: 30px; height: 30px; cursor: pointer; }
.hidden { display: none; }
.quote-section { background: var(--dark); color: #fff; }
.quote-section p { color: #cbd5e1; max-width: 680px; }
.quote-form-card { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.12); color: #fff; }
.footer { background: #0f172a; color: #cbd5e1; }
.footer-inner { padding: 28px 0; }
.small-text { font-size: 18px; }
@media (max-width: 1024px) {
  .hero-inner, .diagram-layout, .quote-layout, .catalog-layout { grid-template-columns: 1fr; }
  .product-grid, .category-grid { grid-template-columns: 1fr 1fr; }
  .sticky-card { position: static; }
}
@media (max-width: 720px) {
  .nav, .topbar-links { display: none; }
  .hero-stats, .finder-grid, .product-grid, .category-grid { grid-template-columns: 1fr; }
  .header-inner, .footer-inner, .topbar-inner, .section-head { flex-direction: column; align-items: flex-start; }
  h2 { font-size: 30px; }
  .hero-copy p { font-size: 16px; }
  .logo { height: 48px; }
}