.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);
}