:root { --bg: #ffffff; --text: #000000; --muted: #616161; --line: #e2e2e2; --link: #000000; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #000000; --text: #ffffff; --muted: #9e9e9e; --line: #262626; --link: #ffffff; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
header a.brand { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--text); letter-spacing: -0.2px; }
nav.lang a { margin-left: 12px; font-size: 14px; color: var(--muted); }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.5px; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; letter-spacing: -0.2px; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--link); }
ul { padding-left: 20px; }
li { margin: 4px 0; }
section.lang-block { padding-top: 8px; }
section.lang-block + section.lang-block { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 32px; }
.steps { counter-reset: s; list-style: none; padding-left: 0; }
.steps li { counter-increment: s; padding-left: 32px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 1px; width: 22px; height: 22px; border-radius: 11px; border: 1px solid var(--line); font-size: 13px; text-align: center; line-height: 20px; }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); margin-right: 16px; }