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

}

body {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 1.5rem;
}

figure {
    width: 25%;
    float: left;
    border: 1px solid gray;
    padding: 5px;
}

img {
    width: 100%;
    border: 1px solid white;
}

figcaption {
    background-color: aliceblue;
    text-align: center;
}

header { text-align: center;
    font-size: 40px;
    background-color: darkgreen;
    color: white;
    padding: 15px; }

.nav { display: flex;
    justify-content: center;
    background-color: rgb(202, 202, 202);}

.nav li {
    display: inline;


}

.nav ul {
    list-style: none;
    display: flex;
    padding: 0px;
    margin: auto;
}

.nav a {
    text-decoration: none;
    width: 100%;
    padding: 5px;
    text-align: center;
    color: black;
    display: block;
}

.nav::after {
    content: "";
    display: table;
    clear: both;
}

.nav li {
    padding: 0px;
    list-style-type: none;
    margin: 10px;
}
.nav a:hover {
    background-color: gray;
}

@media screen and (max-width:600px)
{ nav        { width: 100%; } 
                                article    { width: 100%; } }


.aside {
    margin: 10px;
}