body{
    color: blue;
    background-color: lightblue;    
}
main{
    color: coral;
    width: 1300px;
    margin: 0 auto 0 auto;
}
header{
    background-color: blanchedalmond;
    width: 500px;
    padding: 30px;
    text-align: justify;
    margin: 50px auto;
}

header h1 {
    text-align: center;
}
nav{
    border: 1px solid blue;
    margin: 0 auto;
}

nav ul{
    list-style: none;
    text-align: center;
}

nav li{
    display: inline-table;
}

nav li a{
    color: rgb(14, 61, 76);
    text-decoration: none;
    padding: 10px;
    font-family: Arial, Helvetica, sans-serif;
}
nav li a:hover{
    color: white;
    background-color: coral;
    text-decoration: none;
    padding: 15px;
}
section{
    padding: 15px;
    background-color: bisque;
    margin: 50px auto;
}
.adaptable{
    display: block;
    width: 100%;
 }

.centrada{
    display: block;
    margin: 0 auto;
    width: 5%;
    padding: 10%;
}
section article h3{
    padding: 50px;
    text-align: justify;
}

section article h4{
    padding: 50px;
    margin: auto 300px ;
    text-align: justify;
}

h1, h2, h3, h4 {
    font-family: Arial, Helvetica, sans-serif;
}