:root {
  --indigo: #473BD8;
  --ink: #1a1a22;
  --muted: #5b5b6b;
  --bg: #ffffff;
  --card: #f5f5fa;
  --border: #e3e3ec;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.mark {
  width: 40px; height: 40px;
  border-radius: 11px;
  background: var(--indigo);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 20px;
}
header.site h1 { font-size: 20px; margin: 0; }
header.site span { color: var(--muted); font-size: 13px; }
h1.page { font-size: 28px; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 20px 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
a { color: var(--indigo); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 16px 0;
}
.note { color: var(--muted); font-size: 14px; }
.btn {
  display: inline-block;
  background: var(--indigo);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  margin-top: 8px;
}
label { display: block; font-weight: 600; margin: 14px 0 4px; font-size: 14px; }
input, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}
nav.docs { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
nav.docs a {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e9e9f0; --muted: #a0a0b0; --bg: #14141b;
    --card: #1e1e28; --border: #2e2e3c;
  }
  input, textarea { background: #14141b; color: var(--ink); }
}