:root {
  --brand: #0a84ff;
  --navy: #0b2545;
  --slate: #475569;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f4fafc;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--slate);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 20px;
}

h1 {
  margin: 0 0 4px;
  color: var(--navy);
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  margin: 28px 0 8px;
  color: var(--navy);
  font-size: 17px;
  line-height: 1.3;
}

h3 {
  margin: 16px 0 4px;
  color: var(--navy);
  font-size: 15px;
}

p,
ul {
  margin: 0 0 12px;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 6px;
}

a {
  color: var(--brand);
  text-decoration: none;
}

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

.meta {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 13px;
}

.note {
  margin: 16px 0;
  padding: 12px 14px;
  border: 1px solid #fde68a;
  border-radius: 12px;
  background: #fffbeb;
  color: #78350f;
  font-size: 14px;
}

.links a {
  display: block;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  font-weight: 600;
}

.links a:first-child {
  border-top: 0;
}

footer {
  margin-top: 20px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}