:root {
  color-scheme: light dark;
  --background: #f6f8fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #586579;
  --border: #dce3ee;
  --accent: #0b87d8;
  --accent-soft: #eaf5ff;
  --danger: #b42318;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #07110d;
    --surface: #0b1d15;
    --text: #f5f7fb;
    --muted: #b8c4d6;
    --border: #214333;
    --accent: #28c76f;
    --accent-soft: #0f3020;
    --danger: #ff9a9a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

main {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
  padding: clamp(24px, 5vw, 56px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  margin: 36px 0 12px;
  font-size: 1.35rem;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
}

p,
li {
  color: var(--muted);
}

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

ul,
ol {
  padding-left: 24px;
}

li + li {
  margin-top: 8px;
}

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

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

nav a,
.button-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
}

nav a:hover,
.button-link:hover {
  border-color: var(--accent);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.summary,
.notice {
  margin: 28px 0;
  padding: 18px 20px;
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
}

.danger {
  color: var(--danger);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.card h2 {
  margin-top: 0;
}

footer {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}