:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #16161a;
  --muted: #5b5b66;
  --accent: #10A37F;
  --border: #e6e6ea;
  --card: #f7f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b10;
    --fg: #f2f2f5;
    --muted: #a3a3ad;
    --border: #2a2a33;
    --card: #17171f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
header.site {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
}
header.site .mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent);
}
header.site a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 17px;
}
h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 32px 0 10px; }
p, li { color: var(--fg); font-size: 15px; }
.meta { color: var(--muted); font-size: 13px; margin-bottom: 32px; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  margin: 24px 0;
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0;
}
.feature-grid div {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 14px;
}
.cta {
  display: inline-block;
  margin-top: 8px;
  padding: 12px 20px;
  background: var(--accent);
  color: white;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
footer.site {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
footer.site a { color: var(--muted); }
@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
}