body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}
#player {
    width: 100%;
    height: 400px;
}
#stair-prompt, #share-prompt {
    margin-top: 20px;
    padding: 20px;
    border: 1px solid #ccc;
    background: #f9f9f9;
}
form {
    margin: 20px 0;
}
label {
    display: block;
    margin: 10px 0;
}
input, button {
    padding: 5px;
    margin: 5px 0;
}