body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #111; color: #fff; }
header { background: #222; padding: 1em; text-align: center; }
header h1 { margin: 0; color: #e63946; }
header nav a { margin: 0 10px; color: #fff; text-decoration: none; }
main { padding: 2em; }
button, .donate-btn { background: #e63946; color: white; border: none; padding: 10px 20px; text-decoration: none; cursor: pointer; }
button:hover, .donate-btn:hover { background: #d62828; }
footer { background: #222; text-align: center; padding: 1em; margin-top: 2em; }