body { font-family: Arial, sans-serif; line-height: 1.6; margin: 0; padding: 0; 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 a { color: #fff; text-decoration: none; }
main { padding: 20px; }
section { background: #fff; margin: 20px 0; padding: 15px; border-radius: 5px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }
footer { text-align: center; padding: 10px 0; background: #333; color: #fff; position: relative; bottom: 0; width: 100%; }