:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f5f5f5;
  --text: #0a0a0a;
  --muted: #666666;
  --border: #dedede;
  --inverse: #ffffff;
  --accent: #0a0a0a;
  --max: 900px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #111111;
    --text: #ffffff;
    --muted: #a5a5a5;
    --border: #2b2b2b;
    --inverse: #000000;
    --accent: #ffffff;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a { color: inherit; }
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 1.3rem;
  text-decoration: none;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  font-size: .92rem;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
}
.nav-links a:hover { color: var(--text); }
main { min-height: 70vh; }
.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 110px 22px 90px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .75rem;
  font-weight: 700;
  color: var(--muted);
}
h1 {
  font-size: clamp(3rem, 9vw, 6.8rem);
  line-height: .95;
  letter-spacing: -.065em;
  margin: 18px 0 24px;
}
.hero p {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  max-width: 680px;
  color: var(--muted);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.btn {
  display: inline-block;
  padding: 13px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  text-decoration: none;
  font-weight: 650;
}
.btn.primary {
  background: var(--accent);
  color: var(--inverse);
  border-color: var(--accent);
}
.grid {
  max-width: 1120px;
  padding: 0 22px 90px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 26px;
}
.card h2 { margin-top: 0; letter-spacing: -.03em; }
.card p { color: var(--muted); }
.document {
  max-width: var(--max);
  margin: 0 auto;
  padding: 70px 22px 100px;
}
.document h1 {
  font-size: clamp(2.5rem, 7vw, 4.8rem);
  margin-bottom: 18px;
}
.document h2 {
  margin-top: 48px;
  margin-bottom: 12px;
  letter-spacing: -.025em;
}
.document h3 { margin-top: 30px; }
.meta, .muted { color: var(--muted); }
.notice {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  padding: 18px 20px;
  margin: 26px 0;
}
.document ul, .document ol { padding-left: 22px; }
.document li { margin: 7px 0; }
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}
th, td {
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  padding: 12px 10px;
}
th { font-size: .9rem; }
footer {
  border-top: 1px solid var(--border);
  padding: 34px 22px;
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: .9rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 14px; }
.lang-switch {
  display: inline-flex;
  gap: 8px;
  margin-top: 12px;
}
.lang-switch a {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  text-decoration: none;
}
@media (max-width: 760px) {
  .nav { align-items: flex-start; }
  .nav-links { gap: 10px; font-size: .82rem; }
  .hero { padding-top: 78px; }
  .grid { grid-template-columns: 1fr; }
}