:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1d1f23;
  --muted: #5b616b;
  --line: #e2e0d8;
  --accent: #d9822b;
  --accent-text: #9a5414;
  --road: #2b3035;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --surface: #1d2024;
    --text: #e9e7e1;
    --muted: #a3a8b0;
    --line: #2e3238;
    --accent: #e8964a;
    --accent-text: #f0a865;
    --road: #0e1012;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent-text); }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand svg { width: 30px; height: 30px; flex: none; }

nav.site { display: flex; gap: 18px; font-size: 15px; }
nav.site a { color: var(--muted); text-decoration: none; }
nav.site a:hover, nav.site a[aria-current="page"] { color: var(--text); }

main { padding: 40px 0 56px; }

.hero { text-align: center; padding: 24px 0 8px; }
.hero svg { width: 88px; height: 88px; }
.hero h1 { font-size: 44px; line-height: 1.1; margin: 18px 0 10px; letter-spacing: -0.02em; }
.tagline { font-size: 21px; color: var(--muted); margin: 0 0 22px; }

.badge {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 15px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.features li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
}

.features strong { display: block; margin-bottom: 4px; }
.features span { color: var(--muted); font-size: 15px; }

.note {
  margin-top: 36px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 10px 10px 0;
  color: var(--muted);
  font-size: 15px;
}

article h1 { font-size: 34px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
article .updated { color: var(--muted); margin: 0 0 28px; font-size: 15px; }
article h2 { font-size: 21px; margin: 34px 0 8px; }
article h3 { font-size: 17px; margin: 22px 0 4px; }
article ul { padding-left: 22px; }
article li { margin: 4px 0; }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer.site .wrap { padding-top: 20px; padding-bottom: 28px; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }
footer.site a { color: var(--muted); }

@media (max-width: 480px) {
  body { font-size: 16px; }
  .hero h1 { font-size: 36px; }
  .tagline { font-size: 18px; }
  nav.site { gap: 12px; font-size: 14px; }
  .brand span { display: none; }
}