body { font-family: Arial, sans-serif; padding: 20px; max-width: 500px; margin: auto; }
h1 { text-align: center; }
form { display: flex; flex-direction: column; gap: 10px; }
input { padding: 5px; font-size: 1em; }
button { padding: 10px; font-size: 1em; cursor: pointer; }
#confirmation { margin-top: 20px; font-weight: bold; color: green; }