*{box-sizing: border-box; margin: 5; padding: 0;}

.contenedor{ max-width: 75rem; margin: auto;}

body{   background-color: darksalmon;
        margin:  0%;
       text-align: center;
overflow-x:hidden;}

header {
    background-color: white;
    width: 100%;
    height: 9rem        
}


nav {
    background-color: #eee;
    width: 100%;
    height: 4,5rem;
    display: flex;
    justify-content: center;
}

nav ul li {
    list-style-type: none;
    display: inline;
}

nav ul li a{
    text-decoration: none;
    color: #000;
}

aside div{
    padding: 2em;
}

aside div a{
    text-decoration: none;
    color: #fff;
}

h2 {
    padding: 1rem;
    font-size: 1.5rem;
    background-color: #efe9d9;
    color: #e5a380;
    clear: both;
    }

section {
    background-color: darksalmon;
    width: 100%;
    display: flex;
    justify-content: space-around;
}

aside {
    background-color: crimson;
    width: 100;
    display: flex;
    justify-content: space-around;     
 }