:root {
  --bg: #faf8f5;
  --text: #1c1b19;
  --muted: #5f5b55;
  --line: #e4dfd8;
  --accent: #d9480f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161514;
    --text: #f1eee9;
    --muted: #a8a29a;
    --line: #2e2c29;
    --accent: #ff7a3d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); }
a:hover { text-decoration: none; }
.wrap { max-width: 680px; margin: 0 auto; padding: 0 20px; }
header { padding: 28px 0; }
.brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand span { color: var(--accent); }
.hero { padding: 12vh 0 14vh; }
.hero h1 {
  font-size: clamp(40px, 9vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 20px;
}
.hero h1 span { color: var(--accent); }
.hero p { font-size: 20px; margin: 0 0 6px; }
.hero p.en { color: var(--muted); font-size: 17px; }
.contact { margin-top: 36px; }
.contact p { margin: 0; }
footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
footer p { margin: 0 0 6px; }
footer a { color: var(--muted); }
.doc { padding: 20px 0 48px; }
.doc h1 { font-size: 34px; letter-spacing: -0.02em; line-height: 1.15; margin: 8px 0 4px; }
.doc h2 { font-size: 20px; margin: 32px 0 6px; }
.doc .date { color: var(--muted); margin: 0 0 24px; }
.doc .lang { font-size: 14px; color: var(--muted); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }