:root { --bg: #0a1122; --card: #121c31; --border: #233250; --text: #e8eef9; --muted: #8a97b1; --blue: #4c8dff; }
@media (prefers-color-scheme: light) {
  :root { --bg: #f5f8fd; --card: #ffffff; --border: #e1e7f0; --text: #141b2b; --muted: #5d6a82; --blue: #1f5fe6; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 24px 16px 48px; }
header { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; }
header img { border-radius: 16px; flex: none; }
h1 { font-size: 26px; line-height: 1.2; margin: 0; }
.sub { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
section { background: var(--card); border: 1px solid var(--border); border-radius: 18px;
  padding: 16px 18px; margin-bottom: 14px; }
section.highlight { border-color: var(--blue); }
h2 { font-size: 19px; margin: 0 0 8px; }
p, ul { margin: 0 0 8px; }
ul { padding-left: 22px; }
li { margin-bottom: 4px; }
a { color: var(--blue); }