body { font-family: Arial, sans-serif; background: #1b1b1b; color: #fff; margin: 0; }
header { background: #2c2c2c; padding: 10px; display: flex; justify-content: space-between; align-items: center; }
header nav a { color: #a8ff60; margin: 0 10px; text-decoration: none; }
section { padding: 20px; }
.btn { background: #a8ff60; color: #000; padding: 10px 20px; text-decoration: none; border-radius: 5px; }
footer { background: #2c2c2c; text-align: center; padding: 10px; margin-top: 20px; }
ul { list-style-type: square; }