:root { --bg: #ffffff; --fg: #1f1f1f; --muted: #5f6368; --accent: #0067c0; --card: #f5f7fa; --line: #e3e6ea; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #161616; --fg: #ececec; --muted: #a8adb3; --accent: #4cc2ff; --card: #202224; --line: #2d3033; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 48px 20px 64px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 8px; }
header img { width: 64px; height: 64px; border-radius: 14px; }
h1 { font-size: 34px; margin: 0; }
h2 { font-size: 22px; margin-top: 40px; }
.lead { color: var(--muted); font-size: 19px; margin-top: 4px; }
nav { margin: 24px 0 8px; display: flex; gap: 20px; flex-wrap: wrap; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin: 16px 0; }
ul { padding-left: 22px; }
footer { margin-top: 56px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); padding-top: 16px; }