:root {
  --primary: #0b3d91;   /* Deep blue */
  --accent: #2f7cf6;    /* Highlight blue */
  --light: #f5f7fb;     /* Light background */
  --dark: #0a0f1f;      /* Dark text */
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--dark);
  background: #fff;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

.site-header {
  background: #fff;
  border-bottom: 2px solid var(--light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  height: 50px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav a {
  text-decoration: none;
  color: var(--dark);
  font-weight: bold;
}

.hero {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  text-align: center;
  padding: 80px 20px;
}

.section {
  padding: 60px 20px;
}

.section.alt {
  background: var(--light);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  padding: 20px;
  border: 1px solid var(--light);
  border-radius: 8px;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  text-decoration: none;
  margin-top: 10px;
}

.btn:hover {
  background: var(--accent);
}

.site-footer {
  background: var(--dark);
  color: #fff;
  text-align: center;
  padding: 20px;
}