:root {
  --primary: #2563eb;
  --text: #1e293b;
  --text-secondary: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

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

header {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: white;
  padding: 32px 20px;
  text-align: center;
}

header h1 {
  margin: 0 0 4px;
  font-size: 22px;
}

header p {
  margin: 0;
  opacity: 0.85;
  font-size: 14px;
}

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
}

h2 {
  font-size: 18px;
  margin-top: 32px;
  margin-bottom: 8px;
  color: var(--text);
}

h2:first-child {
  margin-top: 0;
}

p, li {
  font-size: 14px;
  color: var(--text-secondary);
}

strong {
  color: var(--text);
}

.updated {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.notice {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
  color: #92400e;
  margin-bottom: 24px;
}

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

footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 24px;
}