header {
    text-align-last: center;
    background-color: gold;
    font-family:Arial, Helvetica, sans-serif;
    color:royalblue;
    border:solid 8px;
    padding:5px;
    margin-bottom: 15px;
}

h2{
    font-family:Arial, Helvetica, sans-serif;
    text-align-last: center;
}

.container{
    background-color: #ffffff;
    flex-wrap:wrap;
}

nav a{
    display: flex;
    flex-direction: column;
    padding: 10px;
    flex:auto;
    background-color: royalblue;
}
nav a:hover{
    outline: 1px solid #272727;
}

ul{
    display: flex;
    flex-direction:row;
    margin:0;
    padding:0;
}
ul li{
    flex: auto;
    list-style-type:none;
    border-right:solid gold 2px;
    border-bottom:solid gold 2px;
    border-top:solid gold 2px;
    
}

.sec{
    display:flex;
    flex-direction:row;
}

ul li:nth-child(1){
    border-left:solid gold 2px;
}
ul li a {
    display: flex;
    flex: auto;
    text-align:center;
    text-decoration: none;
    justify-content: center;
    font-size: 1.2rem; 
    padding:10px;
    color:gold;
}


article:nth-child(4){
  border-right:none;
}

.art1{
    padding:5px;
    border:solid;
    border-color:royalblue;
    flex:50%;
    text-align: justify;
    background-color:#ffffff;
}

.art2{
    padding:5px;
    border:solid;
    border-color:royalblue;
    flex:50%;
    text-align: justify;
    background-color:#ffffff;
}

.art3{
    padding:5px;
    border:solid;
    border-color:royalblue;
    flex:50%;
    text-align: justify;
    background-color:#ffffff;
}

figure{
    margin:auto;
}

footer {
  background-color: royalblue;
  color: gold;
  padding-top: 10px;
  padding-bottom: 10px;
  text-align: center;
}
.logo{
    margin:25px;
    flex:content;
}

aside {
    width: 55%;
    float: right;
    position: relative;
    padding: 48px;
    border: solid 4px;
    border-radius:4px;
    font-size: 110%;
    clear:none;
    border-color:gold;
}

img {
    width: 100%;
    height: auto;
}