:root {
  --bg: #ffffff;
  --text: #16151c;
  --muted: #5f5c70;
  --line: #e7e5ef;
  --accent: #4b3fd1;
  --card: #f6f5fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111016;
    --text: #f2f1f7;
    --muted: #a3a0b5;
    --line: #2a2835;
    --accent: #9b8cff;
    --card: #1a1922;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px 16px; padding-top: 18px; padding-bottom: 18px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 17px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
main { padding: 48px 0 64px; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 6px; }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 22px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; margin: 20px 0; }
.links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn { display: inline-block; padding: 11px 18px; border-radius: 12px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
footer { border-top: 1px solid var(--line); padding: 24px 0 40px; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); margin-right: 16px; }
@media (max-width: 520px) {
  h1 { font-size: 28px; }
  nav a { margin-left: 12px; }
  table { font-size: 14px; }
}