body {font-family: Arial, sans-serif; margin: 0;}
header {background: #0a3d62; color: white; padding: 10px 20px; display: flex; justify-content: space-between; align-items: center;}
nav a {color: white; text-decoration: none; margin: 0 10px;}
.lang-switch button {background: transparent; border: none; color: white; cursor: pointer;}
.hero {background: #1e90ff; color: white; padding: 50px; text-align: center;}
section {padding: 20px;}