:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --border: #e5e7eb;
  --accent: #0a84ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12;
    --card: #121722;
    --text: #f5f7fb;
    --muted: #c1c8d4;
    --border: #263041;
    --accent: #62a7ff;
  }
}

* {
  box-sizing: border-box;
}

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

.wrapper {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 12px;
}

h1 {
  font-size: 1.9rem;
}

h2 {
  margin-top: 28px;
  font-size: 1.2rem;
}

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

small,
.meta {
  color: var(--muted);
}

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

header {
  margin-bottom: 16px;
}

nav {
  margin: 10px 0 20px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

ul {
  padding-left: 20px;
}

footer {
  margin-top: 24px;
}