* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #222;
  background: #f7f9fb;
}

.container {
  width: min(1100px, 90%);
  margin: 0 auto;
}

.site-header {
  background: #0f172a;
  color: white;
  padding: 1rem 0;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 1rem;
}

.hero {
  padding: 5rem 0;
}

.btn {
  display: inline-block;
  background: #2563eb;
  color: white;
  text-decoration: none;
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  margin-top: 1rem;
}