*{box-sizing: border-box}
html{font-family: 'Roboto', sans-serif;font-size:20px;}
button{width:auto;height:150px;padding:3rem;}
li{margin-top:10px;}
.fondo_header{background-color:hsl(220,50%,50%);}/*Azul*/
.fondo_claro{background-color:hsl(220,55%,45%);}/*Azul*/
.fondo_footer{background-color:#394251;}/* Casi negro*/
.fondo_centro{background-color: #fafcff;}/* Blanco plata*/
.fondo_boton{background-color: hsl(40,50%,50%);} /*beige claro*/
.fondo_lateral{background-color:hsl(40,10%,85%);} /*plata*/
.fondo_blanco{background-color:  hsl(220,10%,90%);}
.fondo_negro{background-color: hsl(220,50%,10%);color:#fafcff;}
.texto_negro{color: hsl(220,50%,10%);}
.texto_blanco{color:hsl(220, 10%, 90%);}
.padding_20{padding: 10px;}
.listamenu{list-style-type: none;}
.redondo{border-radius:0px;}
.term{margin-top:0em;}
.description{color:blue;margin-top:0.25em;margin-left:1.5em;}