*{
    box-sizing: border-box;
}

:root{

}

body{
    margin: 0px;
    padding: 0px;
    font-family: Arial, Helvetica, sans-serif;
    width: 80vw;
    margin: auto;
    border: 2px solid black;
}

header{
    background-color: orange;
    height: 10vh;
    padding: 3vh;
}

header nav{
    width: 60%;
    float: left;
    text-align: center;
}

header nav ul{
    margin: 0px;
    list-style: none;
    padding: 0px;
}

header nav ul li{
    display: inline;
}

header nav ul li a{
    display: inline-block;
    margin: 8px;
    color: black;
    text-decoration: none;
}

header form{
    width: 40%;
    float: right;
}

main{
    background-color: burlywood;
}

main aside{
    float: left;
    width: 25%;
    background-color: burlywood;
}

main aside nav ul{
    list-style: none;
    padding: 0px;
    margin: 0px;
}

main aside nav ul li:first-child{
    border-top: 1px solid black;
}

main aside nav ul li a{
    display: block;
    padding: 10px;
    color: black;
    text-decoration: none;
    border-bottom: 1px solid black;
}

main aside nav ul li a:hover{
    background-color: brown;
    color: white;
}

main article{
    float: right;
    width: 75%;
    background-color: white;
    padding: 10px;
}

main article section{
}

main article section ul{
    list-style: none;
    padding: 0px;
    margin: 0px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}


main article section ul li{
    width: calc((100% / 3) - 10px) ;
    padding: 10px;
    border: 1px solid rgb(221, 219, 219);
    border-radius: 4px;
}

main article section ul li img{
    width: 95%;
    margin: auto;
}



footer{
    background-color: black;
    color: white;
    text-align: center;
    padding-top: 25px;
    padding-bottom: 25px;
}

footer nav ul{
    margin: 0px;
    list-style: none;
    padding: 0px;
}

footer nav ul li{
    display: inline;
}

footer nav ul li a{
    display: inline-block;
    margin: 8px;
    color: white;
    text-decoration: none;
}


.borrar{
    float: none;
    clear: both;
    height: 0px;
}


@media screen and (max-width: 650px){
    main article section ul{
        gap: 0px;
    }

    main article section ul li{
        width: 100%;
    }

}