#banner {
position: absolute;
top: 0px;
left: 0px;
right: 0px;
width: 100%;
height: 200x;
z-index: -1;
}

ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: rgb(52, 62, 67);
}

li {
float: left;
}

li a {
display: block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}

li a:hover {
background-color: #1a2124;
}

ul {
position: fixed;
top: 0;
width: 100%;
} 

.center {
display: block;
margin-left: auto;
margin-right: auto;
width: 50%;
}


hr.def {
width: 100%;
height: 30px;         
}

ol.nostyle {
list-style-type: none;
}

figure {
display: inline-block;
margin: 20px; /* adjust as needed */
}
figure img {
vertical-align: top;
}
figure figcaption {
text-align: center;
font-weight: bold;
}