/* Voltage Lubricants — site stylesheet
   Dark theme with an amber/red motorsport accent, built to sit behind
   a logo designed on a black background. */

:root {
  --bg: #0b0c0e;
  --bg-alt: #141619;
  --bg-card: #191b1f;
  --border: #2a2d32;
  --text: #eceef0;
  --text-dim: #a3a8ad;
  --accent: #e2472a;
  --accent-dim: #a8341d;
  --accent-2: #f2b544;
  --radius: 10px;
  --maxw: 1180px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: #000;
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 72px;
}
.logo {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-badge {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.logo-text span { color: var(--accent-2); }
.site-search {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 6px 4px 14px;
  flex: 1;
  max-width: 260px;
}
.site-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 0.85rem;
  width: 100%;
}
.site-search button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 8px;
}
.site-search button:hover { color: var(--accent-2); }
nav.main-nav { display: flex; gap: 24px; align-items: center; margin-left: auto; }
nav.main-nav a {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
}
nav.main-nav a:hover { color: var(--accent-2); text-decoration: none; }
.basket-link {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px !important;
}
.basket-link:hover { border-color: var(--accent); text-decoration: none; }
.basket-count {
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 1px 7px;
  min-width: 18px;
  text-align: center;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 1rem;
}
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--accent-dim); text-decoration: none; }
.btn.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn.btn-ghost:hover { border-color: var(--accent); color: var(--accent-2); }

/* Hero */
.hero {
  background: radial-gradient(ellipse at top right, rgba(226,71,42,0.18), transparent 60%), var(--bg);
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 5;
  max-height: 480px;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  margin: 0 0 20px;
  max-width: 780px;
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 0 32px;
}
.hero .actions { display: flex; gap: 16px; flex-wrap: wrap; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent-2);
  font-weight: 700;
  margin-bottom: 14px;
}

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-alt); }
h2 { font-size: 1.8rem; margin: 0 0 12px; }
h2.section-title { text-align: center; }
p.section-sub {
  text-align: center;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 44px;
}

/* Category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.cat-card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.cat-card h3 { margin: 0 0 8px; font-size: 1.1rem; color: #fff; }
.cat-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; }
.cat-card .count {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--accent-2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Product grid + cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  align-items: stretch;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.product-card:hover { border-color: var(--accent); }
.product-card-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: inherit;
  flex: 1 1 auto;
}
.product-card-link:hover { text-decoration: none; }
.product-card-link p { flex: 1; }
.add-basket-form {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.add-basket-form input[type="number"] {
  width: 56px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 6px 8px;
  font-size: 0.85rem;
}
.add-basket-form button {
  flex: 1;
  font-size: 0.8rem;
  padding: 8px 10px;
}
.card-image {
  background: #f4f4f2;
  border-radius: 8px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 4px;
}
.card-image img { max-height: 140px; width: auto; margin: 0 auto; }
.card-image.placeholder {
  color: var(--bg);
  opacity: 0.15;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  text-align: center;
  padding: 0 10px;
}
.product-card .tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  font-weight: 700;
}
.product-card h3 { margin: 0; font-size: 1.05rem; color: #fff; line-height: 1.3; }
.product-card p { margin: 0; color: var(--text-dim); font-size: 0.88rem; flex: 1; }
.product-card .specs-mini { font-size: 0.78rem; color: var(--text-dim); }

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}
.filter-bar a {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.filter-bar a.active, .filter-bar a:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  text-decoration: none;
}

/* Product detail page */
.product-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-bottom: 20px;
}
.product-hero.has-image {
  grid-template-columns: 280px 1fr;
  align-items: start;
}
.product-hero-image {
  background: #f4f4f2;
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}
.product-hero-image img { max-height: 320px; }
@media (max-width: 760px) {
  .product-hero.has-image { grid-template-columns: 1fr; }
}
.breadcrumb { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 18px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent-2); }
.product-hero h1 { font-size: clamp(1.6rem, 3vw, 2.3rem); margin: 0 0 16px; }
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.92rem;
}
.specs-table th, .specs-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.specs-table th {
  width: 220px;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}
.qna { margin-top: 40px; }
.qna h2 { font-size: 1.4rem; }
.qna-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.qna-item:last-child { border-bottom: none; }
.qna-item h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  color: var(--accent-2);
}
.qna-item p { margin: 0; color: var(--text-dim); }
.enquire-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  margin-top: 30px;
}
.enquire-box p { color: var(--text-dim); margin: 0 0 16px; }

/* Forms */
form.site-form {
  display: grid;
  gap: 18px;
  max-width: 620px;
}
form.site-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 6px;
  font-weight: 600;
}
form.site-form input,
form.site-form select,
form.site-form textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}
form.site-form input:focus,
form.site-form select:focus,
form.site-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
form.site-form textarea { min-height: 130px; resize: vertical; }
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.checkbox-grid label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  color: var(--text);
  font-size: 0.88rem;
}
.checkbox-grid input { width: auto; }
.form-note { font-size: 0.8rem; color: var(--text-dim); }
.form-status { font-size: 0.9rem; margin-top: 10px; }
.form-status.success { color: #6fcf87; }
.form-status.error { color: #e2472a; }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  background: #000;
  padding: 48px 0 32px;
  margin-top: 60px;
}
footer.site-footer .cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}
footer.site-footer h4 {
  color: #fff;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 14px;
}
footer.site-footer ul { list-style: none; margin: 0; padding: 0; }
footer.site-footer li { margin-bottom: 8px; }
footer.site-footer a { color: var(--text-dim); font-size: 0.9rem; }
footer.site-footer a:hover { color: var(--accent-2); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  color: var(--text-dim);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,0,0,0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, background 0.15s ease;
  z-index: 60;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent-dim); }

/* Misc content pages */
.content-page { padding: 60px 0; }
.content-page h1 { font-size: 2.1rem; margin-bottom: 20px; }
.content-page p { color: var(--text-dim); max-width: 720px; }

@media (max-width: 760px) {
  nav.main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #000;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 18px;
    display: none;
  }
  nav.main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .site-search { display: none; }
  .logo-text { font-size: 0.95rem; }
  .hero { padding: 60px 0 44px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image { order: -1; aspect-ratio: 16 / 10; max-height: 280px; }
  section { padding: 44px 0; }
}