body{
    box-sizing: border-box;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    padding: 0px;
    margin: 0px;
    color: rgb(63, 63, 63);
}

header{
    background-color: rgb(63, 63, 63);
    color: whitesmoke;
    text-align: center;
    padding: 15px;
}

main{
    display: grid;
    grid-template-columns: 20% auto;
}

main nav{
    background-color: rgb(197, 197, 197);
    color: rgb(63, 63, 63);
}

main nav ul{
    list-style: none;
    margin: 0px;
    padding: 0px;
}
main nav ul li a{
    display: block;
    padding: 10px;
    border-bottom: 1px solid rgb(63, 63, 63);
    text-decoration: none;
    color: rgb(63, 63, 63);
}

.listado ul{
    list-style: none;
    margin: 0px;
    padding: 25px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr; 
    gap: 35px;
    margin-top: 20px;
}


.listado ul li a{
    text-decoration: none;
    color: rgb(63, 63, 63);
}

.listado ul li:hover{
    opacity: 0.7;
} 

.listado ul li img{
    max-width: 98%;
    border-radius: 4px;
}

.detalle{
    padding: 20px;
}

.detalle img{
    display: block;
    margin: auto;
    max-width: 60%;
}