:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #161823;
  --muted: #5b6173;
  --border: #e2e6f0;
  --accent: #1f6feb;
}

* {
  box-sizing: border-box;
}

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

main {
  max-width: 860px;
  margin: 32px auto;
  padding: 0 16px;
}

article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}

h1, h2 {
  line-height: 1.25;
}

h1 {
  margin-top: 0;
  font-size: 1.9rem;
}

h2 {
  margin-top: 1.8rem;
  font-size: 1.15rem;
}

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

.meta {
  color: var(--muted);
  margin-top: -8px;
}

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

ul {
  padding-left: 1.2rem;
}

footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.nav a {
  display: block;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  background: #fff;
}

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