ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: auto;
    background-color: #337;
}

li {
    float: left;
}

li a {
    display: block;
    width: 100px;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #33f;
}

.main {
    height: 200px;
}

.center {
  text-align: center;
  border: 3px solid #337;
}

.banner {
    height: 50px;
    padding-top: 10px;
}

.banner2 {
    height: 240px;
    padding-top: 30px;
    background-image: url("images/pikes-peak.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.screen_capture {
    border: 2px solid blue;
    margin: 10px;
    width: 340px;
    height: 600px
}

.return {
    margin-bottom: 10px;
    margin-left: 20px;
    margin-top: 10px
}