/* === GKE Packaging — Industrial Catalog / Supply House === */
:root {
  --steel: #3a6b7c;
  --steel-dark: #1f4556;
  --concrete: #9aa4ae;
  --concrete-light: #d5dbdf;
  --safety: #d4a020;
  --safety-dim: #b8881a;
  --canvas: #ece8df;
  --charcoal: #2a2a2a;
  --carbon: #1d1d1d;
  --caution: #cc7700;
  --white: #ffffff;
  --off-white: #f4f1ea;
}

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

body {
  font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--charcoal);
  background: var(--canvas);
}

/* Top bar with rivets */
.topbar {
  background: var(--steel-dark);
  color: var(--white);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 4px solid var(--safety);
  background-image: 
    radial-gradient(circle at 20px 50%, var(--steel) 2px, transparent 2px),
    radial-gradient(circle at 40px 50%, var(--steel) 2px, transparent 2px);
  background-size: 40px 56px, 40px 56px;
}
.topbar .logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.topbar .logo .badge {
  display: inline-block;
  background: var(--safety);
  color: var(--carbon);
  font-size: 10px;
  padding: 2px 8px;
  letter-spacing: 2px;
  font-weight: 700;
}
.topbar nav a {
  color: var(--white);
  text-decoration: none;
  margin-left: 24px;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 16px 0;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}
.topbar nav a:hover,
.topbar nav a.active {
  border-bottom-color: var(--safety);
  color: var(--safety);
}
.hamburger { display: none; font-size: 24px; cursor: pointer; }

/* Caution stripe section */
.caution-stripe {
  height: 6px;
  background: repeating-linear-gradient(
    45deg,
    var(--safety) 0px, var(--safety) 20px,
    var(--carbon) 20px, var(--carbon) 40px
  );
}

/* Main */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* Hero */
.hero-catalog {
  background: linear-gradient(135deg, var(--steel-dark) 0%, var(--carbon) 100%);
  color: var(--white);
  padding: 60px 40px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.hero-catalog::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent 0px, transparent 30px,
    rgba(255,255,255,0.03) 30px, rgba(255,255,255,0.03) 31px
  );
  pointer-events: none;
}
.hero-catalog h1 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.hero-catalog .subtitle {
  font-size: 18px;
  color: var(--concrete-light);
  letter-spacing: 2px;
  margin-bottom: 24px;
}
.hero-catalog .stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
}
.hero-catalog .stat-item {
  text-align: center;
}
.hero-catalog .stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--safety);
}
.hero-catalog .stat-label {
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--concrete-light);
}

/* Product filter tabs */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 8px 20px;
  border: 2px solid var(--concrete);
  background: var(--white);
  cursor: pointer;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--charcoal);
  transition: all 0.2s;
  font-family: inherit;
}
.filter-btn.active, .filter-btn:hover {
  background: var(--steel);
  color: var(--white);
  border-color: var(--steel);
}

/* Product grid */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.prod-card {
  border: 2px solid var(--concrete-light);
  padding: 24px;
  background: var(--white);
  position: relative;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.prod-card:hover {
  border-color: var(--steel);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}
.prod-card .sku {
  font-size: 11px;
  color: var(--concrete);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.prod-card h3 {
  font-size: 17px;
  color: var(--steel-dark);
  margin-bottom: 8px;
}
.prod-card p {
  font-size: 14px;
  color: var(--charcoal);
}
.prod-card .inventory {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 10px;
  background: var(--concrete-light);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--steel-dark);
}
.prod-card .badge-new {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--safety);
  color: var(--carbon);
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  letter-spacing: 1px;
}

/* Quick Quote */
.quick-quote {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
}
.quick-quote-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  background: var(--safety);
  color: var(--carbon);
  border: none;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  transition: transform 0.2s;
}
.quick-quote-btn:hover { transform: scale(1.05); }

/* Section boxes */
.section-box {
  background: var(--white);
  border-left: 4px solid var(--steel);
  padding: 24px;
  margin-bottom: 24px;
}
.section-box h2 {
  font-size: 20px;
  color: var(--steel-dark);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.section-box p { margin-bottom: 12px; }

/* Process steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0;
}
.step {
  text-align: center;
  padding: 24px 12px;
  border: 2px solid var(--concrete-light);
  background: var(--off-white);
}
.step .num {
  display: inline-block;
  width: 40px; height: 40px;
  line-height: 40px;
  text-align: center;
  background: var(--steel);
  color: var(--white);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 12px;
}
.step h4 { font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--steel-dark); }

/* Specs table */
.specs {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.specs th, .specs td {
  border: 1px solid var(--concrete-light);
  padding: 10px 14px;
  text-align: left;
}
.specs th {
  background: var(--steel-dark);
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
}
.specs tr:nth-child(even) { background: var(--off-white); }

/* Form */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--concrete);
  font-size: 15px;
  font-family: inherit;
  color: var(--charcoal);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--steel);
}
.btn-blueprint {
  display: inline-block;
  padding: 14px 32px;
  background: var(--steel);
  color: var(--white);
  border: none;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s;
}
.btn-blueprint:hover { background: var(--steel-dark); }

/* Footer */
.footer {
  background: var(--steel-dark);
  color: var(--white);
  padding: 32px 24px;
  font-size: 13px;
  text-align: center;
  border-top: 4px solid var(--safety);
}
.footer a { color: var(--safety); text-decoration: none; }

/* Back to top */
.btt {
  position: fixed;
  bottom: 84px;
  right: 24px;
  width: 44px; height: 44px;
  background: var(--steel-dark);
  border: 2px solid var(--safety);
  color: var(--white);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  z-index: 200;
}
.btt.visible { display: flex; }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--steel-dark);
  z-index: 200;
  padding: 80px 40px;
}
.mobile-nav.active { display: flex; flex-direction: column; }
.mobile-nav a {
  color: var(--white);
  text-decoration: none;
  font-size: 22px;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.mobile-nav .close-nav {
  position: absolute;
  top: 14px; right: 20px;
  font-size: 36px;
  color: var(--white);
  cursor: pointer;
}

/* 2-col grid */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* Responsive */
@media (max-width: 768px) {
  .topbar nav { display: none; }
  .hamburger { display: block; }
  .prod-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .hero-catalog .stats { flex-direction: column; gap: 16px; }
}
@media (max-width: 480px) {
  .prod-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
}