.header  {display: grid; grid-template-columns: 170px 530px 280px;}
.comer   {display: grid; grid-template-columns: 330px 330px 330px;}
.seccion {display: grid; grid-template-columns: 1fr;}
.uno > ul {display: grid; grid-template-columns: 5px 30px 40px 230px 40px 40px 40px 40px 40px 40px 40px 40px 200px 1fr;}
.dos > ul {display: grid; grid-template-columns: 5px 30px 40px 230px 40px 40px 40px 40px 40px 40px 40px 40px 40px 40px 
           40px 40px 40px 40px;}
.tres > ul {display: grid; grid-template-columns: 7px 1fr 40px 45px 60px 1fr;}          
.footer  {display: grid; grid-template-columns: 330px 330px 330px;}