:root {
  --bg: #FFFFFF;
  --text: #14161A;
  --text2: #5B6270;
  --line: #E6E9EF;
  --accent: #1F6FE0;
  --chip: #F2F5FA;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1219;
    --text: #EDF1F7;
    --text2: #9AA4B5;
    --line: #232A36;
    --accent: #5A9BFF;
    --chip: #171D28;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 96px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 48px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); text-decoration: none; }
.logo { width: 28px; height: 28px; border-radius: 7px; background: #1F6FE0; display: inline-flex; align-items: center; justify-content: center; }
.logo::before { content: ""; border-left: 10px solid #FFFFFF; border-top: 6px solid transparent; border-bottom: 6px solid transparent; margin-left: 3px; }
nav { display: flex; gap: 6px; }
nav a { padding: 6px 12px; border-radius: 999px; color: var(--text2); text-decoration: none; font-size: 14px; }
nav a[aria-current="page"] { background: var(--chip); color: var(--text); font-weight: 600; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 36px 0 8px; }
.lead, .meta { color: var(--text2); margin: 0 0 8px; }
a { color: var(--accent); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
details summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 0; color: var(--text2); }
.contact { background: var(--chip); border-radius: 14px; padding: 4px 20px 12px; margin-top: 32px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 64px 0 24px; }