:root {
  --bg: #ffffff;
  --text: #16171d;
  --muted: #5d606b;
  --card: #f4f4f6;
  --border: #e4e4e8;
  --accent: #e8304d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f14;
    --text: #f2f2f5;
    --muted: #a3a6b1;
    --card: #1a1c23;
    --border: #2a2d36;
    --accent: #ff3b57;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

header.site img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

header.site a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
}

nav {
  margin-left: auto;
  display: flex;
  gap: 16px;
  font-size: 15px;
}

nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }

p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--accent); }

.hero { text-align: center; padding: 24px 0 8px; }
.hero img { width: 112px; height: 112px; border-radius: 26px; }
.hero p { font-size: 20px; color: var(--muted); margin-top: 4px; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.card strong { display: block; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }

.summary {
  background: var(--card);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 20px 0;
}

footer {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}