:root {
  --bg: #fffdf7;
  --ink: #1f2430;
  --muted: #5b6270;
  --accent: #f2a900;
  --line: #e8e2d0;
  --card: #ffffff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
header {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  min-height: 60px; flex-wrap: wrap;
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); font-size: 18px; }
.brand span { color: var(--accent); }
.lang { display: flex; gap: 6px; }
.lang button {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 6px 12px; border-radius: 999px; cursor: pointer; font: inherit; font-size: 14px;
}
.lang button[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
main { padding: 32px 0 64px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.meta { color: var(--muted); margin: 0 0 24px; font-size: 15px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: #1a5fb4; }
section[data-lang] { display: none; }
section[data-lang].active { display: block; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0; }
footer a { color: inherit; }
@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 26px; }
}