:root {
  color-scheme: light dark;
  --blue: #0a8fd8;
  --blue-dark: #00649d;
  --blue-soft: #e2f3fc;
  --ink: #14212a;
  --muted: #52636f;
  --surface: #ffffff;
  --surface-alt: #f4f8fa;
  --border: #d7e1e7;
  --shadow: 0 18px 48px rgba(10, 74, 112, 0.12);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.7;
}
a { color: var(--blue-dark); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
}
.nav, main, .site-footer {
  width: min(1080px, calc(100% - 40px));
  margin-inline: auto;
}
.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 760;
  text-decoration: none;
}
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--blue-dark); font-weight: 700; }

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  align-items: center;
  gap: 64px;
  padding: 84px 0 72px;
}
.eyebrow { color: var(--blue-dark); font-weight: 740; letter-spacing: 0.04em; }
h1 { margin: 8px 0 18px; font-size: clamp(2.6rem, 7vw, 5rem); line-height: 1.05; }
h2 { margin-top: 0; font-size: clamp(1.55rem, 3vw, 2.15rem); line-height: 1.25; }
h3 { margin-bottom: 6px; }
.lead { max-width: 680px; color: var(--muted); font-size: 1.16rem; }
.hero-icon { width: min(300px, 70vw); justify-self: center; border-radius: 22%; filter: drop-shadow(var(--shadow)); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--ink);
  background: var(--surface);
  font-weight: 700;
  text-decoration: none;
}
.button.primary { color: #fff; border-color: var(--blue); background: var(--blue); }

.section { padding: 68px 0; }
.section.alt {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding-inline: max(20px, calc((100vw - 1080px) / 2));
  background: var(--surface-alt);
}
.section-intro { max-width: 720px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}
.card p { margin-bottom: 0; color: var(--muted); }
.notice {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--blue);
  border-radius: 10px;
  background: var(--blue-soft);
}

.document { max-width: 820px; padding: 56px 0 80px; }
.document h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
.document h2 { margin-top: 48px; padding-top: 8px; }
.document h3 { margin-top: 28px; }
.document li + li { margin-top: 7px; }
.meta { color: var(--muted); }
code { padding: 0.15em 0.38em; border-radius: 5px; background: var(--surface-alt); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-block: 32px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 14px; }

@media (max-width: 760px) {
  .nav { align-items: flex-start; padding-block: 16px; }
  .nav-links { justify-content: flex-end; gap: 10px 14px; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 58px; }
  .hero-icon { grid-row: 1; width: 180px; }
  .grid { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --blue: #58bff5;
    --blue-dark: #8bd3f7;
    --blue-soft: #12394d;
    --ink: #e8f1f5;
    --muted: #afc0c9;
    --surface: #10171b;
    --surface-alt: #172126;
    --border: #33434c;
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  }
  .button.primary { color: #062638; }
}