/* ============================================================
   SK Technocrats — design tokens
   Ink/paper/copper industrial-catalog system. See README for rationale.
   ============================================================ */
:root {
  --ink: #1A1D1F;
  --ink-soft: #4A4F54;
  --paper: #FAFAF8;
  --panel: #FFFFFF;
  --line: #DEDACE;
  --copper: #B5622C;
  --copper-dark: #8F4A1F;
  --steel: #2B4A5E;
  --success: #3F7D53;
  --radius: 3px;
  --max: 1120px;
  font-size: 16px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", -apple-system, Segoe UI, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}
h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; max-width: 62ch; color: var(--ink-soft); }
a { color: var(--steel); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--copper); outline-offset: 2px;
}
.mono { font-family: "IBM Plex Mono", monospace; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
img { max-width: 100%; display: block; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 34px; height: 34px; background: var(--ink); color: var(--copper);
  display: flex; align-items: center; justify-content: center;
  font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: 0.85rem; border-radius: var(--radius);
}
.brand-name { font-family: "Archivo", sans-serif; font-weight: 800; font-size: 1.15rem; color: var(--ink); }
.brand small { display: block; font-family: "IBM Plex Sans"; font-weight: 400; font-size: 0.7rem; color: var(--ink-soft); }
nav.main-nav { display: flex; gap: 22px; flex-wrap: wrap; }
nav.main-nav a { color: var(--ink); font-size: 0.92rem; font-weight: 500; }
.header-cta { display: flex; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius); font-weight: 600; font-size: 0.92rem;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-copper { background: var(--copper); color: #fff; }
.btn-copper:hover { background: var(--copper-dark); }
.btn-outline { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: #fff; }
.btn-steel { background: var(--steel); color: #fff; }
.btn-sm { padding: 7px 12px; font-size: 0.82rem; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 44px; border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero-copy p.lede { font-size: 1.1rem; color: var(--ink-soft); max-width: 46ch; }
.hero-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
.spec-panel {
  background: var(--ink); color: #F2EFE9; border-radius: var(--radius); padding: 26px 24px;
  font-family: "IBM Plex Mono", monospace;
}
.spec-panel .sp-label { font-size: 0.72rem; color: #B8B3A6; margin-bottom: 10px; }
.spec-panel .sp-name { font-family: "Archivo", sans-serif; font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 14px; }
.spec-panel dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0 0 16px; font-size: 0.85rem; }
.spec-panel dt { color: #9B9587; }
.spec-panel dd { margin: 0; color: #F2EFE9; text-align: right; }
.spec-panel .sp-price { font-size: 1.6rem; color: var(--copper); font-weight: 700; }

/* ---------- Trust bar ---------- */
.trust-bar { background: var(--ink); color: #EDEAE3; padding: 14px 0; }
.trust-bar .wrap { display: flex; gap: 28px; flex-wrap: wrap; justify-content: space-between; font-size: 0.85rem; }
.trust-bar strong { color: var(--copper); }

/* ---------- Section ---------- */
section { padding: 52px 0; }
.section-head { margin-bottom: 28px; max-width: 60ch; }
.section-head .kicker { font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; color: var(--copper); display: block; margin-bottom: 8px; }

/* ---------- Category grid ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cat-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 20px;
  background: var(--panel); transition: border-color .15s ease;
}
.cat-card:hover { border-color: var(--copper); text-decoration: none; }
.cat-card .count { font-family: "IBM Plex Mono", monospace; font-size: 0.75rem; color: var(--ink-soft); }
.cat-card h3 { margin-bottom: 4px; }

/* ---------- Product grid ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.prod-card {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
  display: flex; flex-direction: column; overflow: hidden;
}
.prod-card .thumb { aspect-ratio: 1; background: #F0EEE7; display: flex; align-items: center; justify-content: center; }
.prod-card .thumb svg { width: 100%; height: 100%; }
.prod-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.prod-body h3 { font-size: 0.98rem; margin-bottom: 0; }
.prod-body h3 a { color: var(--ink); }
.prod-spec-line { font-family: "IBM Plex Mono", monospace; font-size: 0.75rem; color: var(--ink-soft); }
.prod-price { font-weight: 700; font-size: 1.05rem; margin-top: auto; }
.prod-price .unit { font-weight: 400; font-size: 0.78rem; color: var(--ink-soft); }
.prod-actions { display: flex; gap: 8px; }

/* ---------- Value props ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-item { border-top: 2px solid var(--copper); padding-top: 14px; }

/* ---------- Product detail ---------- */
.breadcrumb { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 20px; }
.breadcrumb a { color: var(--ink-soft); }
.product-detail { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 42px; padding: 40px 0; }
.product-detail .thumb-lg { border: 1px solid var(--line); border-radius: var(--radius); background: #F0EEE7; aspect-ratio: 1; }
.spec-table { width: 100%; border-collapse: collapse; margin: 18px 0 22px; font-size: 0.92rem; }
.spec-table th, .spec-table td { text-align: left; padding: 9px 0; border-bottom: 1px solid var(--line); }
.spec-table th { width: 40%; color: var(--ink-soft); font-weight: 500; }
.spec-table td { font-family: "IBM Plex Mono", monospace; }
.price-row { display: flex; align-items: baseline; gap: 10px; margin: 6px 0 20px; }
.price-row .amount { font-size: 2rem; font-weight: 800; font-family: "Archivo", sans-serif; }
.detail-actions { display: flex; gap: 12px; margin-bottom: 26px; flex-wrap: wrap; }
.answer-block { background: #F2EFE7; border-left: 3px solid var(--copper); padding: 14px 18px; border-radius: 0 var(--radius) var(--radius) 0; margin-bottom: 24px; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq-item h3 { font-size: 1rem; margin-bottom: 6px; }

/* ---------- Quote band ---------- */
.quote-band { background: var(--steel); color: #fff; padding: 44px 0; }
.quote-band h2 { color: #fff; }
.quote-band p { color: #D6E2E8; }
.quote-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.quote-form input, .quote-form select, .quote-form textarea {
  padding: 11px 12px; border: 1px solid #4C6C7E; border-radius: var(--radius);
  background: #26485A; color: #fff; font-family: inherit; font-size: 0.92rem;
}
.quote-form input::placeholder, .quote-form textarea::placeholder { color: #9FB8C4; }
.quote-form .full { grid-column: 1 / -1; }

/* ---------- Footer ---------- */
footer.site-footer { background: var(--ink); color: #C7C2B6; padding: 48px 0 24px; font-size: 0.88rem; }
footer.site-footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
footer.site-footer h4 { color: #fff; font-size: 0.85rem; margin-bottom: 12px; font-family: "IBM Plex Sans"; }
footer.site-footer a { color: #C7C2B6; }
footer.site-footer a:hover { color: var(--copper); }
footer.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-bottom { border-top: 1px solid #34383C; margin-top: 32px; padding-top: 18px; font-size: 0.78rem; color: #86807A; }

/* ---------- WhatsApp float ---------- */
.wa-float {
  position: fixed; bottom: 20px; right: 20px; z-index: 60;
  background: #25D366; color: #fff; width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 10px rgba(0,0,0,0.25);
}
.wa-float svg { width: 28px; height: 28px; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .product-detail { grid-template-columns: 1fr; }
  footer.site-footer .wrap { grid-template-columns: 1fr 1fr; }
  nav.main-nav { order: 3; width: 100%; justify-content: flex-start; }
  .quote-form { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .cat-grid, .prod-grid { grid-template-columns: 1fr 1fr; }
  footer.site-footer .wrap { grid-template-columns: 1fr; }
}