body { font-family: Arial; background: #f5f5f5; margin: 0; padding: 20px; }
header { background: white; padding: 20px; border-radius: 5px; margin-bottom: 20px; }
header h1 { margin: 0; }
header p { margin: 5px 0 0; color: #666; }
main { max-width: 800px; margin: 0 auto; background: white; padding: 30px; border-radius: 5px; }
label { display: block; margin: 15px 0; }
input { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; }
.btn { padding: 10px 20px; background: #2196F3; color: white; border: none; border-radius: 4px; cursor: pointer; }
.btn:hover { background: #0b7dda; }
textarea { border: 1px solid #ddd; border-radius: 4px; padding: 10px; }