.content {
    max-width: 1200px;
    min-width: 412px;
    margin: 0 auto; 
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

@media (max-width: 800px) {
    .content {
        margin: 0;
        padding: 0;
        min-width: 412px;
    }
}

#toggleClose:checked ~ .box {
    display: none;
}