#ruleta-container {
    text-align: center;
    margin-top: 20px;
}
canvas {
    border-radius: 50%;
    background: #580942;
    /* box-shadow: 0 0 20px #000;*/
}
#ruleta-form {
    margin-top: 20px;
}
#ruleta-form input, #ruleta-form button {
    margin: 5px;
    padding: 10px;
    font-size: 16px;
}