html,
body
{
    background-color: blueviolet;
    margin-top: 50px;
}
#logo img
{
    left: 20%;
    right: 20%;
}
img 
{
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 30%;
}
button
{
    margin:10px;
}
.relative {
    padding: 10px;
    position: relative;
    margin: 10px;
   } 
.navitem {
     display: inline-block;
     width: 30px; 
     height: 70px; 
     text-align: center;
     border: gray;
     background-color: #E8562A;
     cursor: pointer;
     font-weight: bold;
   }