:root {
  --bg: #f7fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0ea5e9;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eff6ff 0%, var(--bg) 45%);
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 18px 56px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
}

h1, h2, h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: 1.9rem;
  margin-bottom: 10px;
}

h2 {
  margin-top: 24px;
  font-size: 1.25rem;
}

p, li {
  color: var(--muted);
  line-height: 1.6;
}

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

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 18px;
}

.nav a {
  text-decoration: none;
  border: 1px solid var(--border);
  background: #f8fafc;
  border-radius: 999px;
  padding: 8px 12px;
  color: #0f172a;
  font-size: 0.95rem;
}

.kv {
  margin: 10px 0;
  padding: 0;
  list-style: none;
}

.kv li {
  margin: 5px 0;
}

.footer {
  margin-top: 22px;
  font-size: 0.9rem;
  color: #64748b;
}