:root {
  --bg: #fcfcfb;
  --surface: #f3f2ef;
  --text: #1c1f23;
  --muted: #4a4f57;
  --line: #e3e1dc;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 19px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.mark { width: 28px; height: 28px; border-radius: 50%; background: radial-gradient(circle at 50% 100%, var(--accent) 0 45%, #f59e5b 46% 62%, #fde3cf 63%); }
nav a { color: var(--text); text-decoration: none; margin-left: 24px; font-size: 17px; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
main { padding: 64px 0 96px; }
.hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: center; }
h1 { font-size: clamp(36px, 5vw, 56px); line-height: 1.08; letter-spacing: -0.025em; margin: 0 0 20px; }
h2 { font-size: 28px; line-height: 1.2; letter-spacing: -0.015em; margin: 56px 0 12px; }
h3 { font-size: 21px; margin: 32px 0 6px; }
p, li { max-width: 65ch; color: var(--muted); }
.lead { font-size: 22px; color: var(--muted); margin: 0 0 32px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 14px 24px; border-radius: 999px; font-weight: 600; text-decoration: none; transition: transform .15s ease; }
.btn:active { transform: translateY(1px); }
.sun { aspect-ratio: 1; border-radius: var(--radius); background:
  radial-gradient(circle at 50% 108%, #c2410c 0 22%, #ea7a3d 23% 34%, #f8b586 35% 48%, #fde7d6 49% 66%, var(--surface) 67%); }
.principles { display: grid; grid-template-columns: 1fr 1fr; gap: 40px 56px; margin-top: 72px; padding-top: 48px; border-top: 1px solid var(--line); }
.principles h2 { margin-top: 0; font-size: 22px; }
.doc { max-width: 720px; }
.doc .updated { font-size: 16px; color: var(--muted); }
.callout { background: var(--surface); border-radius: var(--radius); padding: 24px 28px; margin: 28px 0; }
.callout p { margin: 0; color: var(--text); }
footer.site { border-top: 1px solid var(--line); padding: 32px 0; font-size: 16px; color: var(--muted); }
footer.site .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer.site a { color: var(--muted); margin-left: 20px; }
@media (max-width: 767px) {
  body { font-size: 18px; }
  .wrap { padding: 0 16px; }
  main { padding: 40px 0 64px; }
  .hero, .principles { grid-template-columns: 1fr; gap: 32px; }
  .sun { max-width: 320px; }
  nav a { margin-left: 16px; }
  footer.site a { margin: 0 16px 0 0; }
}