/* ============================================================
   Precision Circuits West — Design System
   Palette: Ink (base) / Panel / Copper (accent) / Signal / Paper
   Type:    Space Grotesk (display) / Inter (body) / JetBrains Mono (specs)
   ============================================================ */

:root {
  --ink: #0B1120;
  --ink-2: #0E1526;
  --panel: #141B2D;
  --panel-2: #1B2438;
  --line: #263048;
  --copper: #B87333;
  --copper-hi: #D98E45;
  --signal: #4FD1C5;
  --paper: #EDEFF2;
  --muted: #93A0B8;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --maxw: 1180px;
  --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; font-weight: 600; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }
.lede { color: var(--muted); font-size: 1.12rem; max-width: 62ch; }
.mono { font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.02em; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.18em; color: var(--copper-hi); display: block; margin-bottom: 12px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 17, 32, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--paper); font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--copper) 0%, var(--copper-hi) 100%);
  display: grid; place-items: center; color: var(--ink); font-weight: 700; font-size: 0.8rem;
}
.nav-links { display: flex; gap: 26px; list-style: none; align-items: center; }
.nav-links a { color: var(--muted); font-size: 0.92rem; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--paper); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--paper); border-radius: 8px; padding: 8px 12px; font-size: 1rem; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 13px 26px; border-radius: var(--radius);
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; transition: all 0.18s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--copper); color: #fff; }
.btn-primary:hover { background: var(--copper-hi); }
.btn-ghost { border-color: var(--line); color: var(--paper); background: transparent; }
.btn-ghost:hover { border-color: var(--copper); color: var(--copper-hi); }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 64px; display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hero .actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero h1 span { color: var(--copper-hi); }
.cert-strip { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.cert-chip {
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.06em;
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; color: var(--muted);
}
.cert-chip strong { color: var(--signal); font-weight: 500; }

/* ---------- Layer stack (signature element) ---------- */
.stack { display: flex; flex-direction: column; gap: 5px; perspective: 900px; }
.stack .layer {
  height: 26px; border-radius: 5px; cursor: pointer; position: relative;
  transform: skewX(-14deg); transition: transform 0.2s ease, filter 0.2s ease;
  border: 1px solid rgba(255,255,255,0.06);
}
.stack .layer:hover { transform: skewX(-14deg) translateX(14px); filter: brightness(1.25); }
.layer.copper { background: linear-gradient(90deg, #8C5A28, var(--copper)); }
.layer.core { background: #2E5339; }
.layer.prepreg { background: #57683F; height: 14px; }
.layer.mask { background: #1E4D40; height: 12px; }
.layer.silk { background: #C9CDD4; height: 8px; }
.stack-tip {
  margin-top: 18px; min-height: 52px; font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--signal); border-left: 2px solid var(--copper); padding-left: 14px;
}
.stack-label { color: var(--muted); font-size: 0.78rem; margin-top: 10px; font-family: var(--font-mono); }

/* ---------- Sections / cards ---------- */
section.band { padding: 72px 0; border-top: 1px solid var(--line); }
.band.tint { background: var(--ink-2); }
.grid { display: grid; gap: 22px; margin-top: 40px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; transition: border-color 0.2s ease;
}
.card:hover { border-color: var(--copper); }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.95rem; }
.card .mono { color: var(--signal); display: block; margin-top: 14px; }

/* ---------- Spec tables ---------- */
table.spec { width: 100%; border-collapse: collapse; margin-top: 26px; font-size: 0.93rem; }
.spec th, .spec td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); }
.spec th { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--copper-hi); }
.spec td:last-child { font-family: var(--font-mono); color: var(--signal); font-size: 0.86rem; }
.spec tr:hover td { background: var(--panel); }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 40px; }
.stat { border-left: 2px solid var(--copper); padding-left: 18px; }
.stat b { font-family: var(--font-display); font-size: 2rem; display: block; color: var(--paper); }
.stat span { color: var(--muted); font-size: 0.88rem; }

/* ---------- Forms ---------- */
form.pcw { display: grid; gap: 18px; margin-top: 34px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 0.88rem; font-weight: 500; }
.field small { color: var(--muted); font-size: 0.78rem; }
.field input, .field select, .field textarea {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  color: var(--paper); padding: 13px 15px; font-family: var(--font-body); font-size: 0.95rem;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--copper); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 0.82rem; color: var(--muted); }
.form-status { font-family: var(--font-mono); font-size: 0.85rem; min-height: 24px; }
.form-status.ok { color: var(--signal); }
.form-status.err { color: #E76F51; }
.dropzone {
  border: 1.5px dashed var(--line); border-radius: var(--radius); padding: 30px;
  text-align: center; color: var(--muted); cursor: pointer; transition: border-color 0.2s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--copper); color: var(--paper); }
.file-list { list-style: none; font-family: var(--font-mono); font-size: 0.8rem; color: var(--signal); display: grid; gap: 5px; }

/* ---------- CTA band / footer ---------- */
.cta-band { text-align: center; padding: 84px 0; }
.cta-band .btn { margin-top: 26px; }
.site-footer { border-top: 1px solid var(--line); padding: 56px 0 34px; background: var(--ink-2); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px; }
.foot-grid h4 { font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--copper-hi); margin-bottom: 14px; }
.foot-grid ul { list-style: none; display: grid; gap: 9px; }
.foot-grid a { color: var(--muted); font-size: 0.9rem; }
.foot-grid a:hover { color: var(--paper); }
.foot-brand p { color: var(--muted); font-size: 0.88rem; margin-top: 12px; max-width: 34ch; }
.foot-legal { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; color: var(--muted); font-size: 0.8rem; flex-wrap: wrap; gap: 10px; }

/* ---------- Page headers / prose ---------- */
.page-head { padding: 72px 0 20px; }
.prose { max-width: 74ch; color: var(--muted); display: grid; gap: 16px; margin-top: 24px; }
.prose h2, .prose h3 { color: var(--paper); margin-top: 18px; }
.prose li { margin-left: 20px; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; padding-top: 56px; }
  .grid.c3, .grid.c4 { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: var(--ink-2); border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 20px 24px; align-items: flex-start;
  }
  .nav-links.open { display: flex; }
}
@media (max-width: 600px) {
  .grid.c3, .grid.c4, .grid.c2, .row2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
}