body { font-family: Arial, sans-serif; margin: 0; padding: 20px; background-color: #f4f4f4; }
header { background: #333; color: #fff; padding: 10px 0; text-align: center; }
nav ul { list-style: none; padding: 0; }
nav ul li { display: inline; margin: 0 15px; }
nav ul li a { color: white; text-decoration: none; }
main { margin: 20px 0; }
section { margin-bottom: 40px; padding: 20px; background: white; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
footer { text-align: center; padding: 10px; background: #333; color: white; position: relative; bottom: 0; width: 100%; }