/* =========================================================
   Armourtec — shared.css
   Sitewide tokens, reset, nav, footer, buttons, typography.
   Used by all deep pages. Index.html keeps inline copies for now.
   ========================================================= */

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Geist', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img, svg { display: block; }

/* Tokens */
:root {
  --bg: #0A0A0B;
  --bg-elevated: #131316;
  --fg: #F4F4F5;
  --fg-muted: #9A9AA1;
  --fg-subtle: #5A5A62;
  --accent: #E10600;
  --accent-bright: #FF1F12;
  --accent-glow: rgba(225, 6, 0, 0.18);
  --cool: #38BDF8;
  --cool-glow: rgba(56, 189, 248, 0.25);
  --border: #1E1E22;
  --border-strong: #2A2A30;
  --mono: 'Geist Mono', ui-monospace, 'SF Mono', monospace;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1280px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 14px;
}
.logo-mark { width: 22px; height: 22px; color: var(--accent); }
.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--fg-muted);
  transition: color 0.15s;
  font-weight: 500;
}
.nav-links a:hover,
.nav-links a.active { color: var(--fg); }
.nav-right {
  display: flex;
  align-items: center;
  gap: 22px;
}
.lang-toggle {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-subtle);
  letter-spacing: 0.1em;
  user-select: none;
}
.lang-toggle a,
.lang-toggle span { padding: 4px 6px; transition: color 0.15s; cursor: pointer; }
.lang-toggle a:hover,
.lang-toggle span:hover { color: var(--fg-muted); }
.lang-toggle a.active,
.lang-toggle span.active { color: var(--fg); }
.nav-cta {
  font-size: 13px;
  font-weight: 500;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  transition: all 0.18s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-cta:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.005em;
  padding: 16px 28px;
  border-radius: 4px;
  transition: all 0.18s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 10px 30px var(--accent-glow);
}
.btn-primary .arrow { transition: transform 0.2s; }
.btn-primary:hover .arrow { transform: translateX(4px); }
.btn-ghost {
  color: var(--fg);
  padding: 16px 0;
  gap: 14px;
}
.btn-ghost:hover { color: var(--fg-muted); }
.btn-ghost .play {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s;
}
.btn-ghost:hover .play { background: rgba(255, 255, 255, 0.14); }

/* Footer */
.footer {
  position: relative;
  background: rgba(7, 7, 8, 1);
  border-top: 1px solid var(--border);
  padding: 80px 32px 40px;
}
.footer-content { max-width: 1280px; margin: 0 auto; }
.footer-tagline {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.96;
  margin-bottom: 56px;
  max-width: 800px;
}
.footer-tagline span { color: var(--fg-muted); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.footer-col-label {
  font-family: var(--mono); font-size: 11px;
  color: var(--fg-subtle); letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 20px;
}
.footer-col p, .footer-col li {
  font-size: 14px; color: var(--fg-muted);
  line-height: 1.7; list-style: none;
}
.footer-col a { color: var(--fg-muted); transition: color 0.15s; }
.footer-col a:hover { color: var(--fg); }
.footer-address strong {
  color: var(--fg); font-weight: 500;
  font-family: var(--mono); font-size: 13px;
  letter-spacing: 0.04em;
}
.footer-trust {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.footer-trust-item {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-muted);
}
.footer-trust-item svg { flex-shrink: 0; width: 16px; height: 16px; color: var(--accent); }
.footer-trust-item:nth-child(2) svg { color: var(--cool); }
.footer-trust-item strong { color: var(--fg); font-weight: 500; }
.footer-bottom {
  display: flex; justify-content: space-between;
  align-items: center; gap: 24px; flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--mono); font-size: 11px;
  color: var(--fg-subtle); letter-spacing: 0.08em;
}
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { color: var(--fg-subtle); }
.footer-bottom-links a:hover { color: var(--fg-muted); }

/* Generic typography for prose pages (technology, validation, about etc.) */
.prose {
  max-width: 760px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--fg-muted);
}
.prose h1, .prose h2, .prose h3 {
  color: var(--fg);
  letter-spacing: -0.025em;
}
.prose h1 {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  line-height: 0.98;
  margin-bottom: 28px;
  letter-spacing: -0.04em;
}
.prose h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  margin-top: 64px;
  margin-bottom: 18px;
}
.prose h3 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 10px;
}
.prose p + p { margin-top: 18px; }
.prose ul, .prose ol {
  margin: 18px 0 18px 24px;
}
.prose ul li, .prose ol li {
  margin-bottom: 10px;
}
.prose strong { color: var(--fg); font-weight: 600; }
.prose a { color: var(--cool); border-bottom: 1px solid var(--cool); }

/* Page header (deep pages) */
.page-hero {
  position: relative;
  padding: 96px 32px 64px;
  max-width: 1280px;
  margin: 0 auto;
}
.page-hero-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.page-hero-meta::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
}
.page-hero h1 {
  font-size: clamp(44px, 6.4vw, 84px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.96;
  margin-bottom: 24px;
  max-width: 16ch;
}
.page-hero .lead {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--fg-muted);
  line-height: 1.55;
  max-width: 64ch;
}

/* Page body wrapper */
.page-body {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 120px;
}

/* Mobile */
@media (max-width: 920px) {
  .nav-inner { padding: 14px 20px; }
  .nav-links { display: none; }
  .footer { padding: 56px 20px 32px; }
  .footer-tagline { font-size: clamp(28px, 8vw, 40px); margin-bottom: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; padding-bottom: 40px; margin-bottom: 24px; }
  .footer-trust { grid-template-columns: 1fr; gap: 14px; padding: 24px 0; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .page-hero { padding: 64px 20px 48px; }
  .page-body { padding: 0 20px 80px; }
}