.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.cool-cart {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 420px;
    height: 100vh;
    background: #fff;
    padding: 24px;
    box-shadow: -8px 0 32px rgba(0,0,0,.12);
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 9999;
    overflow-y: auto;
}

.cool-cart.is-open {
    transform: translateX(0);
}