.wrap {margin: 0 auto; width: 95%;}
.wrap[max='1640'] {max-width: 1640px;}
.wrap[max='1600'] {max-width: 1600px;}
.wrap[max='1440'] {max-width: 1440px;}
.wrap[max='1300'] {max-width: 1300px;}

@media screen and (max-width: 820px){
    .wrap{ width: 90%; }
}