:root {
  color-scheme: light dark;
  --background: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.88);
  --text: #14213d;
  --secondary: #60708d;
  --border: rgba(32, 70, 128, 0.12);
  --accent: #1769ff;
  --accent-soft: rgba(23, 105, 255, 0.09);
  --shadow: 0 22px 70px rgba(33, 57, 105, 0.10);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% -10%, rgba(23, 105, 255, 0.18), transparent 30rem),
    radial-gradient(circle at 95% 8%, rgba(71, 199, 172, 0.13), transparent 28rem),
    var(--background);
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: max(12px, env(safe-area-inset-top)) 20px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(245, 247, 251, 0.82);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-inner {
  width: min(920px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 760;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 10px;
  background: linear-gradient(145deg, #2f80ff, #0b56e8);
  box-shadow: 0 8px 20px rgba(23, 105, 255, 0.28);
}

.language {
  padding: 7px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 650;
}

.language:hover { text-decoration: none; border-color: rgba(23, 105, 255, 0.35); }

main {
  width: min(920px, calc(100% - 32px));
  margin: 48px auto;
}

.document {
  padding: clamp(28px, 6vw, 64px);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.summary {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--secondary);
  font-size: 17px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 24px 0 0;
  color: var(--secondary);
  font-size: 14px;
}

.notice {
  margin: 34px 0;
  padding: 18px 20px;
  border: 1px solid rgba(23, 105, 255, 0.14);
  border-radius: 18px;
  background: var(--accent-soft);
}

.notice strong { color: var(--accent); }

section { margin-top: 40px; scroll-margin-top: 88px; }

h2 {
  margin: 0 0 12px;
  font-size: 23px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 10px 0; }
ul { margin: 10px 0; padding-left: 22px; }
li + li { margin-top: 7px; }

.table-wrap { overflow-x: auto; margin: 18px 0; }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: 14px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--secondary); font-size: 13px; }

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 32px;
}

.home-card {
  display: block;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 14px 40px rgba(33, 57, 105, 0.07);
}

.home-card:hover { text-decoration: none; border-color: rgba(23, 105, 255, 0.35); transform: translateY(-1px); }
.home-card h2 { margin-bottom: 8px; }
.home-card p { color: var(--secondary); }
.home-card span { color: var(--accent); font-weight: 700; }

footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 max(36px, env(safe-area-inset-bottom));
  color: var(--secondary);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 640px) {
  main { margin: 24px auto; }
  .document { border-radius: 22px; }
  .home-grid { grid-template-columns: 1fr; }
  .summary { font-size: 16px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #09101e;
    --surface: rgba(17, 27, 46, 0.9);
    --text: #f4f7ff;
    --secondary: #a5b2c9;
    --border: rgba(167, 190, 232, 0.14);
    --accent: #69a1ff;
    --accent-soft: rgba(75, 139, 255, 0.12);
    --shadow: 0 26px 80px rgba(0, 0, 0, 0.28);
  }
  .site-header { background: rgba(9, 16, 30, 0.82); }
}