:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #1d2130;
  --muted: #646b7d;
  --accent: #2f6fe4;
  --border: #e3e6ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181f;
    --panel: #1f222b;
    --text: #e9ebf1;
    --muted: #9097a8;
    --accent: #6a9eff;
    --border: #343947;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, sans-serif;
}
main {
  max-width: 720px;
  margin: 40px auto;
  padding: 32px 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
@media (max-width: 760px) {
  main { margin: 0; border-radius: 0; border-width: 0; padding: 24px 16px; }
}
header { text-align: center; margin-bottom: 8px; }
.logo { display: block; width: 96px; height: 96px; margin: 0 auto; }
h1 { margin: 4px 0 8px; font-size: 30px; }
h2 { font-size: 20px; margin-top: 32px; }
.tagline, .muted { color: var(--muted); }
a { color: var(--accent); }
code { background: var(--bg); padding: 1px 5px; border-radius: 4px; font-size: 0.92em; overflow-wrap: anywhere; }
.small { font-size: 14px; }
.button {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 24px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.button:hover { filter: brightness(1.08); }
footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; text-align: center; }