canvas {
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 480px;
}

 /* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content/Box */
.modal-content {
    border-radius: 10px;
    background-color: #fefefe;
    margin:25% auto;
    padding: 20px;
    border: 1px solid #888;
    width: fit-content;
}

.center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.button {
    background-color: #4CAF50; /* Green */
    border: none;
    border-radius: 10px;
    color: white;
    padding: 15px;
    margin: 0 auto;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    cursor: pointer;
}

.hidden {
    display: none;
}