body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header { background: #f4f4f4; padding: 20px; text-align: center; }
nav a { margin: 0 10px; text-decoration: none; color: #333; }
section { padding: 20px; }
h2 { color: #444; }
img { max-width: 100%; height: auto; }
audio { width: 100%; }
footer { background: #333; color: #fff; text-align: center; padding: 10px; }