body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header { background: #333; color: white; padding: 10px 20px; text-align: center; }
main { padding: 20px; }
.event-card { border: 1px solid #ddd; padding: 20px; border-radius: 10px; margin-bottom: 20px; }
button { padding: 10px 18px; cursor: pointer; background: #007bff; color: white; border: none; border-radius: 5px; }
form { display: flex; flex-direction: column; max-width: 400px; gap: 10px; margin-bottom: 30px; }
input, textarea { padding: 8px; border: 1px solid #ccc; border-radius: 4px; }
@media(max-width:768px) { .event-card { width: 100%; box-sizing: border-box; } }