/* ==========================================================================
   Honda & Toyota OE Parts — Industrial catalog / technical-document style
   ========================================================================== */

:root {
  --bg: #F8F9FA;
  --bg-white: #FFFFFF;
  --bg-dark: #1A1A2E;
  --accent: #E85D04;
  --accent-hover: #F48C06;
  --text: #212529;
  --text-muted: #6C757D;
  --border: #DEE2E6;
  --img-bg: #F0F0F0;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "Courier New", monospace;
  --radius: 4px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- Typography ---------- */

h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -0.01em; }

h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin-bottom: 1rem; }

.mono, .part-number {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: 0.01em;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.75rem;
}

/* ---------- Layout ---------- */

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.container-form { max-width: 600px; margin: 0 auto; padding: 0 24px; }

section { padding: 72px 0; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  white-space: nowrap;
}
.logo span { color: var(--accent); }

.main-nav { display: flex; gap: 4px; margin-left: auto; }

.main-nav a {
  color: var(--text);
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: var(--radius);
}
.main-nav a:hover { background: var(--bg); color: var(--accent); }
.main-nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

.header-cta {
  margin-left: 8px;
  white-space: nowrap;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  margin-left: auto;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid #212529;
}
.btn-outline:hover { background: #212529; color: #fff; }

.btn-lg { padding: 14px 32px; font-size: 1.02rem; }

/* ---------- Cards ---------- */

.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--accent); }

.card-img {
  background: var(--img-bg);
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-img img { width: 100%; height: 100%; object-fit: cover; }

.card-body { padding: 24px; }
.card-body h3 { margin-bottom: 0.5rem; }

/* ---------- Tables (part number reference) ---------- */

.part-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.part-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 500;
  padding: 10px 12px;
  border-bottom: 2px solid var(--text);
}
.part-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.part-table td.mono { white-space: nowrap; }

/* ---------- Dark CTA band ---------- */

.cta-band {
  background: var(--bg-dark);
  color: #fff;
  text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #B8BCC8; max-width: 640px; margin: 0 auto 28px; }
.cta-band .mono { color: var(--accent-hover); }

/* ---------- Forms ---------- */

.form-grid { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.req { color: var(--accent); }

input[type="text"],
input[type="email"],
input[type="number"],
select,
textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: transparent;
}

textarea { resize: vertical; min-height: 110px; }

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ---------- Product page split layout ---------- */

.product-layout {
  display: grid;
  grid-template-columns: 55fr 45fr;
  gap: 48px;
  align-items: start;
}

.gallery-main {
  background: var(--img-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  aspect-ratio: 1 / 1;
  overflow: hidden;
  margin-bottom: 12px;
}
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }

.gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }

.gallery-thumbs img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  background: var(--img-bg);
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
}
.gallery-thumbs img.active { border-color: var(--accent); }

.info-block { margin-bottom: 32px; }

.info-block h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Field Notes ---------- */

.meta-line {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-muted);
  margin-right: 8px;
}
.tag:hover, .tag.active { border-color: var(--accent); color: var(--accent); }

.article h2 { font-size: 1.45rem; margin: 2.2em 0 0.8em; }
.article h3 { margin: 1.8em 0 0.6em; }
.article ul, .article ol { margin: 0 0 1.2em 1.4em; }
.article li { margin-bottom: 0.5em; }

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.93rem;
}
.article table th, .article table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}
.article table th {
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.disclaimer {
  border-left: 3px solid var(--accent);
  background: var(--bg);
  padding: 16px 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 2.5em 0;
}

/* ---------- Placeholder image frames ---------- */

.img-placeholder {
  width: 100%;
  height: 100%;
  min-height: 280px;
  background:
    repeating-linear-gradient(45deg, #e9ecef 0 12px, #f0f0f0 12px 24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #868E96;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: center;
  padding: 20px;
  gap: 8px;
}
.img-placeholder strong { font-size: 1rem; color: #6C757D; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--bg-dark);
  color: #B8BCC8;
  padding: 56px 0 32px;
  margin-top: 72px;
}
.site-footer a { color: #E9ECEF; }
.site-footer a:hover { color: var(--accent-hover); }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand { font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-note { font-size: 0.88rem; line-height: 1.7; max-width: 460px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  font-size: 0.84rem;
  line-height: 1.7;
}

/* ---------- Mobile floating inquiry button ---------- */

.mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--accent);
  color: #fff;
  text-align: center;
  padding: 15px;
  font-weight: 600;
  z-index: 90;
}
.mobile-cta:hover { background: var(--accent-hover); color: #fff; }

/* ---------- Breadcrumb ---------- */

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .product-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 768px) {
  section { padding: 48px 0; }

  .nav-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 24px 20px;
  }
  .main-nav.open { display: flex; }

  .header-cta { display: none; }

  .form-row { grid-template-columns: 1fr; }

  .mobile-cta { display: block; }

  .container-form { max-width: 600px; margin: 0 auto; }
}

/* ---------- Page hero (inner pages) ---------- */

.page-hero {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}
.page-hero p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0;
}
.page-hero h1 { margin-bottom: 10px; }