*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, sans-serif;
  color: #1a1a1a;
  background: #fff;
  line-height: 1.6;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid #e5e5e5;
}

header h1 { font-size: 1.5rem; letter-spacing: 0.05em; }

nav a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: #444;
  font-size: 0.95rem;
}

nav a:hover { color: #000; }

main { max-width: 860px; margin: 0 auto; padding: 3rem 2rem; }

.hero { margin-bottom: 3rem; }
.hero h2 { font-size: 2rem; margin-bottom: 0.75rem; }
.hero p { font-size: 1.1rem; color: #555; }

section { margin-bottom: 2.5rem; }
section h2 { font-size: 1.4rem; margin-bottom: 1rem; border-bottom: 2px solid #e5e5e5; padding-bottom: 0.4rem; }
section ul { padding-left: 1.5rem; }
section ul li { margin-bottom: 0.4rem; }
section a { color: #1a6fb5; }

footer {
  text-align: center;
  padding: 1.5rem;
  color: #888;
  font-size: 0.85rem;
  border-top: 1px solid #e5e5e5;
}