/* ============================================================
   EcoLite-EXP — Explosion-Proof & Hazardous Location Lighting
   Design system: hazard-black / amber-alert / blueprint-blue
   Ported from the ecolite-exp Vercel concept, rebuilt mobile-first
   for Astro + Cloudflare Pages.
   ============================================================ */

:root {
  --hazard-black: #0A0A0A;
  --instrument-gray: #1C1F26;
  --panel: #14171D;
  --amber-alert: #FFB300;
  --amber-bright: #FFC733;
  --blueprint-blue: #1A3A5C;
  --danger-red: #D32F2F;
  --industrial: #546E7A;
  --light: #F5F5F0;
  --white: #FFFFFF;
  --text-primary: #FFFFFF;
  --text-body: #B8C5CE;
  --text-dim: #7C8B96;
  --border-line: rgba(255,179,0,0.15);
  --border-line-strong: rgba(255,179,0,0.35);

  --font-display: 'IBM Plex Sans Condensed', 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'IBM Plex Mono', 'JetBrains Mono', 'Fira Code', monospace;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius-card: 4px;
  --radius-btn: 4px;
  --shadow-dark: 0 4px 32px rgba(0,0,0,0.6);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--hazard-black);
  line-height: 1.6;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.02em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
:focus-visible { outline: 2px solid var(--amber-alert); outline-offset: 3px; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius-btn);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.2s var(--ease);
  cursor: pointer;
  border: none;
}
.btn-amber { background: var(--amber-alert); color: var(--hazard-black); }
.btn-amber:hover { background: var(--amber-bright); transform: scale(1.03); box-shadow: 0 0 28px rgba(255,179,0,.55), 0 4px 20px rgba(255,179,0,.3); }
.btn-ghost { background: transparent; border: 2px solid rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--hazard-black); }
.btn-outline { background: transparent; border: 1px solid var(--amber-alert); color: var(--amber-alert); padding: 10px 20px; font-size: 13px; }
.btn-outline:hover { background: var(--amber-alert); color: var(--hazard-black); }
.btn-full { width: 100%; justify-content: center; }
.btn-large { padding: 16px 48px; font-size: 17px; }

/* ============ NAV ============ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--hazard-black);
  border-bottom: 1px solid var(--border-line);
}
.nav-container {
  max-width: 1280px; margin: 0 auto; padding: 0 20px; height: 72px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { font-family: var(--font-display); font-weight: 800; font-size: 20px; letter-spacing: .04em; color: #fff; }
.logo .amber { color: var(--amber-alert); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { font-family: var(--font-display); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-body); transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--amber-alert); }
.nav-cta { display: flex; align-items: center; gap: 16px; }

.hamburger { display: none; flex-direction: column; gap: 5px; width: 28px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; height: 2px; background: #fff; border-radius: 1px; transition: all .3s var(--ease); }
.mobile-menu { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); background: var(--instrument-gray); border-top: 1px solid var(--border-line); }
body.menu-open .mobile-menu { max-height: 80vh; overflow-y: auto; }
.mobile-menu nav { display: flex; flex-direction: column; padding: 16px 20px 24px; gap: 4px; }
.mobile-menu a { display: block; padding: 14px 4px; font-family: var(--font-display); font-size: 15px; letter-spacing: .04em; text-transform: uppercase; color: var(--text-body); border-bottom: 1px solid rgba(255,255,255,.06); }
.mobile-menu a:hover { color: var(--amber-alert); }
.mobile-menu .btn { margin-top: 12px; }

/* ============ HERO ============ */
.hero {
  padding: 140px 20px 80px;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(255,179,0,.08), transparent 60%), var(--hazard-black);
  text-align: center;
}
.hero-eyebrow { font-family: var(--font-display); font-size: 13px; letter-spacing: .18em; text-transform: uppercase; color: var(--amber-alert); margin-bottom: 20px; }
.hero h1 { font-size: clamp(2.6rem, 9vw, 5.5rem); line-height: 1.02; margin-bottom: 20px; }
.hero p.lede { font-family: var(--font-body); font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-body); max-width: 640px; margin: 0 auto 36px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============ SECTION HEADERS ============ */
.section-head { text-align: center; margin-bottom: 48px; }
.section-eyebrow { font-family: var(--font-display); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--amber-alert); margin-bottom: 12px; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 3rem); margin-bottom: 12px; }
.section-head p { color: var(--text-body); max-width: 600px; margin: 0 auto; }

section { padding: 80px 0; }
section.alt { background: var(--instrument-gray); }

/* ============ PRODUCT GRID / CARDS ============ */
.pgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.pcard {
  background: var(--panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color .25s, transform .25s;
  display: flex; flex-direction: column;
}
.pcard:hover { border-color: var(--border-line-strong); transform: translateY(-3px); }
.pcard-art { background: #fff; min-height: 180px; display: flex; align-items: center; justify-content: center; padding: 16px; position: relative; }
.pcard-art img { width: 100%; height: 100%; max-height: 200px; object-fit: contain; }
.pcard-body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.pcard-tag { font-family: var(--font-display); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--amber-alert); margin-bottom: 6px; }
.pcard-title { font-family: var(--font-display); font-size: 18px; text-transform: none; letter-spacing: 0; margin-bottom: 8px; color: #fff; }
.pcard-specs { font-size: 12.5px; color: var(--text-body); display: flex; flex-wrap: wrap; gap: 6px 14px; margin-bottom: 14px; }
.pcard-specs b { color: #fff; }
.pcard-cta { margin-top: auto; font-family: var(--font-display); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--amber-alert); }

/* ============ CERT CHIPS ============ */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-family: var(--font-mono); font-size: 11px; padding: 5px 10px; border: 1px solid var(--border-line-strong); border-radius: 3px; color: var(--amber-alert); background: rgba(255,179,0,.06); }

/* ============ CERT MATRIX ============ */
.matrix-wrap { overflow-x: auto; border: 1px solid var(--border-line); border-radius: var(--radius-card); }
.matrix { width: 100%; border-collapse: collapse; min-width: 640px; }
.matrix th, .matrix td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border-line); font-size: 13px; }
.matrix th { font-family: var(--font-display); letter-spacing: .06em; text-transform: uppercase; font-size: 11px; color: var(--amber-alert); background: var(--panel); }
.matrix td.cert-yes { color: #4CAF50; }
.matrix td.cert-no { color: var(--text-dim); }
.matrix tr:hover td { background: rgba(255,255,255,.02); }

/* ============ CLASSIFICATION TOOL ============ */
.classify-card { background: var(--panel); border: 1px solid var(--border-line); border-radius: var(--radius-card); padding: 32px; max-width: 780px; margin: 0 auto; }
.classify-step { margin-bottom: 28px; }
.classify-step-label { font-family: var(--font-display); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--amber-alert); margin-bottom: 14px; }
.classify-options { display: grid; gap: 10px; }
.classify-option { display: block; padding: 14px 16px; border: 1px solid var(--border-line); border-radius: var(--radius-card); cursor: pointer; transition: border-color .2s, background .2s; }
.classify-option:hover { border-color: var(--border-line-strong); }
.classify-option input { display: none; }
.classify-option.checked { border-color: var(--amber-alert); background: rgba(255,179,0,.08); }
.classify-option-title { font-weight: 700; color: #fff; font-size: 14.5px; }
.classify-option-desc { font-size: 12.5px; color: var(--text-body); margin-top: 2px; }
.classify-result { margin-top: 24px; padding: 20px; border: 1px solid var(--amber-alert); border-radius: var(--radius-card); background: rgba(255,179,0,.05); display: none; }
.classify-result.show { display: block; }
.classify-result .cls-code { font-family: var(--font-display); font-size: 28px; color: var(--amber-alert); }

/* ============ FOOTER ============ */
.site-footer { background: var(--instrument-gray); border-top: 1px solid var(--border-line); padding: 56px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
.footer-col h4 { font-family: var(--font-display); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--amber-alert); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13.5px; color: var(--text-body); margin-bottom: 10px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid var(--border-line); padding-top: 24px; font-size: 12.5px; color: var(--text-dim); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ============================================================
   MOBILE OPTIMIZATION — consolidated, always AFTER base rules
   ============================================================ */
@media (max-width: 1020px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 700px) {
  .hero { padding: 110px 16px 56px; }
  .hero h1 { font-size: clamp(2.2rem, 10vw, 3.6rem); }
  section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .classify-card { padding: 20px; }
}

@media (max-width: 480px) {
  .pgrid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .matrix { min-width: 100%; }
}