form {
    width: 100%;
}
.center {
  width: 800px;
  height: 600px;
  margin-left: -400px;
  margin-top: -300px;

}


nav ol {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
    width:100%;
  }

nav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}
  
nav li {
    float: left;
  }
nav li a:hover {
    background-color: #111;
  }

nav li {
    border-right: 1px solid #bbb;
  }
  
nav li:last-child {
    border-right: none;
  }
svg {
  width: 100px;
}

div.welcome {
  text-align: right;
  font-size: 24pt;
}