:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #16161a;
  --muted: #5c5c66;
  --line: #e6e6ea;
  --accent: #fa4773;
  --card: #f7f7f9;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#0d0d0f; --fg:#f2f2f5; --muted:#a0a0ac; --line:#26262c; --card:#16161a; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
header { border-bottom: 1px solid var(--line); padding-bottom: 20px; margin-bottom: 28px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 34px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 16px; margin: 22px 0 6px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 14px; margin: 0; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 18px 0; }
.en { border-top: 1px solid var(--line); margin-top: 44px; padding-top: 24px; }
.en h2 { margin-top: 0; }
footer { border-top: 1px solid var(--line); margin-top: 44px; padding-top: 18px; }
.lang { float: right; font-size: 14px; }
.lang a { text-decoration: none; }
@media (max-width: 480px) { .lang { float: none; display: block; margin-bottom: 10px; } }