/* HEAVYLINE SEO pages (product / OE) — shared lightweight stylesheet.
   Generated static pages link this file so OE numbers are crawlable
   without duplicating CSS in every file. */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --black: #111111; --dark: #1e1e1e; --mid-grey: #6b6b6b;
  --light-grey: #e8e8e8; --bg-off: #f5f5f5; --white: #ffffff;
  --blue: #0050a0; --blue-dark: #003d7a; --accent: #e8a000;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 1100px; --radius: 3px;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--dark); background: var(--white); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: var(--blue); }
a:hover { color: var(--blue-dark); }
img { max-width: 100%; display: block; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header { background: var(--white); border-bottom: 1px solid var(--light-grey); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { font-size: 19px; font-weight: 800; letter-spacing: .12em; color: var(--black); text-transform: uppercase; }
.brand span { color: var(--blue); }
.site-nav { display: flex; gap: 28px; }
.site-nav a { font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--dark); }
.site-nav a:hover, .site-nav a.active { color: var(--blue); }
.btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; letter-spacing: .04em; padding: 12px 26px; border: none; cursor: pointer; border-radius: var(--radius); transition: background .2s; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-dark); color: #fff; }
.btn-ghost { background: transparent; color: var(--blue); border: 1.5px solid var(--blue); }
.btn-ghost:hover { background: var(--blue); color: #fff; }

/* Breadcrumb */
.breadcrumb { font-size: 13px; color: var(--mid-grey); margin: 20px 0 4px; }
.breadcrumb a { color: var(--mid-grey); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 8px; }

/* Product layout */
.page { padding: 24px 0 56px; }
.product-head { border-bottom: 1px solid var(--light-grey); padding-bottom: 20px; margin-bottom: 28px; }
.product-head h1 { font-size: clamp(24px, 3vw, 34px); font-weight: 700; color: var(--black); line-height: 1.2; }
.product-grid { display: grid; grid-template-columns: minmax(260px, 380px) 1fr; gap: 40px; align-items: start; }
.product-media img { width: 100%; border: 1px solid var(--light-grey); border-radius: var(--radius); background: var(--bg-off); }
.product-media .ph-box { width: 100%; aspect-ratio: 4/3; border: 1px dashed var(--mid-grey); border-radius: var(--radius); background: var(--bg-off); display: flex; align-items: center; justify-content: center; text-align: center; color: var(--mid-grey); font-size: 14px; padding: 20px; }

.oe-block { margin: 22px 0; }
.oe-block h2 { font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); margin-bottom: 10px; }
.oe-list { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.oe-list li a { display: inline-block; background: var(--bg-off); border: 1px solid var(--light-grey); border-radius: var(--radius); padding: 8px 14px; font-weight: 600; font-family: 'Roboto Mono', 'Courier New', monospace; letter-spacing: .02em; color: var(--dark); }
.oe-list li a:hover { border-color: var(--blue); color: var(--blue); }

.spec-table { width: 100%; border-collapse: collapse; margin: 18px 0 26px; }
.spec-table th, .spec-table td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--light-grey); font-size: 14px; vertical-align: top; }
.spec-table th { width: 200px; color: var(--mid-grey); font-weight: 600; background: var(--bg-off); }
.spec-table td { color: var(--dark); font-weight: 500; }

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

/* OE landing page */
.oe-hero { padding: 36px 0 12px; }
.oe-hero h1 { font-size: clamp(24px, 3vw, 34px); font-weight: 700; color: var(--black); line-height: 1.25; word-break: break-word; }
.oe-hero .oe-num { font-family: 'Roboto Mono', 'Courier New', monospace; color: var(--blue); }
.match-list { list-style: none; margin: 20px 0; display: grid; gap: 14px; }
.match-list li { border: 1px solid var(--light-grey); border-radius: var(--radius); padding: 16px 18px; background: var(--white); }
.match-list .m-title { font-size: 17px; font-weight: 700; color: var(--black); }
.match-list .m-meta { font-size: 13px; color: var(--mid-grey); margin-top: 4px; }
.match-list a.m-title:hover { color: var(--blue); }

.note { font-size: 14px; color: var(--mid-grey); margin: 10px 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--light-grey); background: var(--bg-off); margin-top: 40px; }
.site-footer .container { padding: 28px 24px; display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; font-size: 13px; color: var(--mid-grey); }
.site-footer a { color: var(--mid-grey); margin-right: 18px; }
.site-footer a:hover { color: var(--blue); }

/* Visually-hidden SEO index (kept in HTML source for crawlers) */
.seo-index { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.seo-index ul { list-style: none; }
.seo-index li { font-size: 12px; }

@media (max-width: 760px) {
  .product-grid { grid-template-columns: 1fr; }
  .site-nav { gap: 16px; }
  .spec-table th { width: 130px; }
}