body { font-family: Arial, sans-serif; margin: 0; background: #f9f9f9; }
header { background: #222; color: #fff; padding: 15px; }
nav a { color: #fff; margin-right: 20px; text-decoration: none; }
main { padding: 20px; }
input, textarea { width: 100%; padding: 10px; margin: 10px 0; }
button, .button { padding: 10px 15px; background: #333; color: #fff; border: 0; cursor: pointer; }
.report { background: #fff; padding: 15px; margin: 10px 0; border: 1px solid #ddd; }