:root {
  --bg: #f7f7f9;
  --surface: #ffffff;
  --text: #1a1b25;
  --muted: #6b6e85;
  --border: #e3e4ee;
  --accent: #5b5bd6;
  --accent-soft: #ecebfe;
  --ok: #1a9e5c;
  --ok-soft: #e3f6ec;
  --warn: #b97a08;
  --warn-soft: #fdf3df;
  --err: #d24545;
  --err-soft: #fdeaea;
  --up: #1a9e5c;
  --down: #d24545;
  --radius: 12px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131420;
    --surface: #1b1c2b;
    --text: #ecedf6;
    --muted: #9598b3;
    --border: #2c2e44;
    --accent: #8583f2;
    --accent-soft: #262552;
    --ok: #3ecf8e;
    --ok-soft: #12301f;
    --warn: #e6b455;
    --warn-soft: #33270f;
    --err: #f07575;
    --err-soft: #391a1a;
    --up: #3ecf8e;
    --down: #f07575;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 620px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

h1 {
  font-size: 1.7rem;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

h1 a {
  color: inherit;
  text-decoration: none;
}

.tagline {
  color: var(--muted);
  margin: 0 0 32px;
}

a {
  color: var(--accent);
}

.links {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}

.links a {
  display: block;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}

.links a:hover {
  border-color: var(--accent);
}

.links .hint {
  color: var(--muted);
  font-size: 0.88rem;
  display: block;
}

footer {
  margin-top: 40px;
  color: var(--muted);
  font-size: 0.85rem;
}