/* Seismic Technology - Modern Responsive Redesign
   No frameworks. Clean, accessible, responsive.
*/
:root{
  --bg: #0b0f19;
  --bg2: #0f1629;
  --surface: rgba(255,255,255,.06);
  --surface2: rgba(255,255,255,.10);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);
  --border: rgba(255,255,255,.12);
  --shadow: 0 16px 40px rgba(0,0,0,.35);
  --brand: #6ee7ff;
  --brand2:#a78bfa;
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1120px;
  --focus: 0 0 0 3px rgba(110,231,255,.28);
}
@media (prefers-color-scheme: light){
  :root{
    --bg: #f7f9ff;
    --bg2:#eef2ff;
    --surface: rgba(17,24,39,.05);
    --surface2: rgba(17,24,39,.08);
    --text: rgba(17,24,39,.92);
    --muted: rgba(17,24,39,.68);
    --border: rgba(17,24,39,.12);
    --shadow: 0 18px 50px rgba(17,24,39,.12);
  }
}
*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(167,139,250,.35), transparent 55%),
    radial-gradient(900px 500px at 85% 10%, rgba(110,231,255,.28), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}
html {
  overflow-y: scroll;
  scrollbar-gutter: stable;
}
a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 4px; }
img{ max-width:100%; display:block; }
.container{ width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.skip-link{
  position:absolute; left:-999px; top: 10px;
  background: var(--text); color: var(--bg);
  padding: 10px 12px; border-radius: 10px; z-index: 9999;
}
.skip-link:focus{ left: 12px; outline: none; box-shadow: var(--focus); }
header.site-header{
  position: sticky; top:0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.navbar{ display:flex; align-items:center; justify-content: space-between; gap: 16px; padding: 14px 0; }
.brand{ display:flex; align-items:center; gap: 10px; text-decoration:none !important; }
.logo{
  width: 36px; height: 36px; border-radius: 12px;
  background:
    radial-gradient(12px 12px at 30% 35%, rgba(255,255,255,.75), transparent 60%),
    linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 10px 24px rgba(0,0,0,.22);
}
.brand-title{ display:flex; flex-direction:column; line-height: 1.1; }
.brand-title strong{ font-size: 15px; letter-spacing: .2px; }
.brand-title span{ font-size: 12px; color: var(--muted); }
.nav-links{ display:flex; gap: 14px; align-items:center; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a{
  padding: 9px 10px; border-radius: 12px; color: var(--muted);
  font-weight: 560; letter-spacing: .15px;
}
.nav-links a.active{ color: var(--text); background: var(--surface); border: 1px solid var(--border); text-decoration: none; }
.nav-links a:hover{ color: var(--text); text-decoration:none; background: var(--surface); }
.nav-cta{ display:flex; gap: 10px; align-items:center; }
.button{
  display:inline-flex; align-items:center; gap: 10px;
  padding: 10px 12px; border-radius: 14px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); text-decoration:none !important; font-weight: 650;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.button:hover{ transform: translateY(-1px); background: var(--surface2); }
.button.primary{
  border-color: color-mix(in srgb, var(--brand) 55%, var(--border));
  background:
    radial-gradient(900px 140px at 20% 0%, rgba(110,231,255,.28), transparent 60%),
    linear-gradient(135deg, color-mix(in srgb, var(--brand) 35%, var(--surface)), color-mix(in srgb, var(--brand2) 35%, var(--surface)));
}
.button:focus, .icon-btn:focus, .nav-links a:focus{ outline: none; box-shadow: var(--focus); }
.icon-btn{
  display:none; align-items:center; justify-content:center;
  width: 42px; height: 42px; border-radius: 14px;
  border: 1px solid var(--border); background: var(--surface); cursor:pointer;
}
@media (max-width: 920px){
  .nav-links{ display:none; }
  .icon-btn{ display:inline-flex; }
}
.mobile-drawer{ display:none; position: fixed; inset: 0; z-index: 80; background: rgba(0,0,0,.42); }
.mobile-drawer[aria-hidden="false"]{ display:block; }
.drawer-panel{
  position:absolute; right: 12px; top: 12px;
  width: min(420px, calc(100% - 24px));
  border-radius: 22px; border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow); overflow:hidden;
}
.drawer-header{ display:flex; align-items:center; justify-content: space-between; padding: 14px 14px 12px; border-bottom: 1px solid var(--border); }
.drawer-body{ padding: 10px; display:grid; gap: 8px; }
.drawer-body a{
  padding: 12px 12px; border-radius: 14px;
  border: 1px solid transparent; color: var(--muted);
  text-decoration:none; font-weight: 650;
}
.drawer-body a:hover{ border-color: var(--border); background: var(--surface); color: var(--text); }
.drawer-footer{ padding: 12px 14px 14px; border-top: 1px solid var(--border); display:flex; gap: 10px; flex-wrap: wrap; }
main{ padding: 38px 0 64px; }
.hero{ padding: 26px 0 18px; }
.hero-grid{ display:grid; grid-template-columns: 1fr .8fr; gap: 32px; align-items: start; }
@media (max-width: 920px){ .hero-grid{ grid-template-columns: 1fr; } }
.kicker{
  display:inline-flex; gap: 10px; align-items:center;
  padding: 7px 10px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--muted); font-weight: 650; font-size: 12.5px;
}
.kicker .dot{
  width: 8px; height: 8px; border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 0 0 4px rgba(110,231,255,.14);
}
h1{ font-size: clamp(30px, 3.2vw, 44px); line-height: 1.08; margin: 14px 0 10px; letter-spacing: -0.02em; }
.lead{ color: var(--muted); font-size: 17px; margin: 0 0 18px; }
.hero-actions{ display:flex; gap: 12px; flex-wrap: wrap; align-items:center; }
.card{
  border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); box-shadow: 0 10px 32px rgba(0,0,0,.18);
}
.card.pad{ padding: 18px; }
.card h2{ margin: 0 0 8px; font-size: 16px; letter-spacing: -.01em; }
.card p, .card li{ color: var(--muted); }
.card ul{ margin: 10px 0 0 18px; }
.mini{ display:grid; gap: 12px; }
.stat{
  display:flex; gap: 12px; align-items: flex-start; padding: 14px;
  border-radius: 16px; border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 65%, transparent);
}
.badge{
  width: 38px; height: 38px; border-radius: 14px; border: 1px solid var(--border);
  background:
    radial-gradient(18px 18px at 30% 35%, rgba(255,255,255,.55), transparent 60%),
    linear-gradient(135deg, color-mix(in srgb, var(--brand) 60%, transparent), color-mix(in srgb, var(--brand2) 60%, transparent));
}
.stat strong{ display:block; font-size: 13px; }
.stat span{ display:block; font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.section{ margin-top: 28px; }
.section h2{ font-size: 18px; margin: 0 0 12px; letter-spacing: -.01em; }
.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 920px){ .grid-3{ grid-template-columns: 1fr; } }
.tile{
  padding: 16px; border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 75%, transparent);
  transition: transform .12s ease, background .12s ease;
}
.tile:hover{ transform: translateY(-1px); background: color-mix(in srgb, var(--surface2) 80%, transparent); }
.tile h3{ margin: 0 0 6px; font-size: 15px; }
.tile p{ margin: 0; color: var(--muted); }
.breadcrumb{ color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.breadcrumb a{ color: inherit; }
.prose{ margin-top: 10px; }
.prose h2{ margin-top: 22px; }
.prose p{ color: var(--muted); margin: 10px 0; }
.prose li{ color: var(--muted); margin: 6px 0; }
.prose ol, .prose ul{ padding-left: 18px; }
.hr{ height: 1px; background: var(--border); margin: 22px 0; }
.footer{ border-top: 1px solid var(--border); padding: 26px 0 34px; color: var(--muted); }
.footer-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 920px){ .footer-grid{ grid-template-columns: 1fr; } }
.footer small{ color: var(--muted); }
.footer-links{ display:flex; gap: 10px; flex-wrap: wrap; }
.footer-links a{
  padding: 8px 10px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface);
  text-decoration:none;
}
.footer-links a:hover{ background: var(--surface2); text-decoration:none; }
.note{ font-size: 13px; color: var(--muted); }
kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px; padding: 2px 7px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface);
}