div.container {
    background-color: var(--verylightxl);
    padding: 20px;
    width: 800px;
    height: 500px;
    position:relative;
    margin-left:auto;
    margin-right: auto;
    margin-top: 100px;
    margin-bottom: 100px;
    border-radius: 50px;
    border: 5px solid var(--light);
}
div.a-container {
    display: block;
    margin: 20px 10px;
    font-size: 2.5rem;
}
button#checkout-btn {
    font-family: var(--font);
    font-size: 2.5rem;
    background: none;
    border: none;
    padding: 0;
    text-decoration: underline;
}
button#checkout-btn {
    color: #0000ee;
}
button#checkout-btn:active {
    color: #ff0000;
}