:root {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #5a5a6e;
  --accent: #4d61e0;
  --border: #e7e8ee;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.site {
  text-align: center;
  padding: 48px 20px 16px;
}

.brand {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 4px;
  background: linear-gradient(135deg, #1a1a2e, #4f46e5);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  color: var(--text-secondary);
  margin: 8px auto 0;
  max-width: 520px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 32px;
  box-shadow: 0 1px 2px rgba(26, 26, 46, 0.04);
}

h1 {
  font-size: 26px;
  margin: 0 0 4px;
}

h2 {
  font-size: 19px;
  margin: 32px 0 8px;
  padding-top: 8px;
}

h3 {
  font-size: 16px;
  margin: 20px 0 4px;
  color: var(--text);
}

.meta {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 0 8px;
}

.note {
  background: rgba(77, 97, 224, 0.06);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
  color: var(--text-secondary);
  font-size: 15px;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

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

ul { padding-left: 22px; }
li { margin: 4px 0; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.links a {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 20px;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
}

.back {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 14px;
  text-decoration: none;
}

footer.site {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 24px 20px 48px;
}