.header {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 26;
    font-weight: lighter;
    text-align: center;
    color: #03378a;
    padding-top: 60px;
    padding-right: 40px;
    padding-bottom: 40px;
    padding-left: 40px;
    margin-left: initial;
}

h2 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 22;
    font-weight: lighter;
    color: #03378a;
    text-align: center;
}

h3 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 16;
    font-weight: lighter;
    color: #03378a;
    text-align: center;
}
.intro-p {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18;
    line-height: 25px;
    padding-top: 0px;
    padding-right: 40px;
    padding-bottom: 0px;
    padding-left: 40px;
    margin-left: initial;
}
.intro-list {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18;
    line-height: 25px;
    padding-top: 0px;
    padding-right: 40px;
    padding-bottom: 0px;
    padding-left: 100px;
    margin-left: initial;
}

hgroup {
    background-color: #021545;
    padding: 40px;
    text-align: left;
    color: white;
}

.block {
    margin: 0;
    display: inline-block;
}

.dvheader {
    color: whitesmoke;
    font-weight: 600;
}

.dvtext {
    font-style: italic;
}

.toggle {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 16;
    font-weight: lighter;
    color: #03378a;
    text-align: center;
    margin: 0;
    display: inline-block;
    margin-left: 50px;
    margin-top: 8px;
    padding: 25px;
}

p {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18;
    line-height: 25px;
    padding-top: 5px;
    padding-right: 20px;
    padding-bottom: 0px;
    padding-left: 20px;
    margin-left: initial;
}

.hide-dom {
    display: none
}

button {
    margin: 15px;
    height: 40;
    width: 100;
    background-color: #e6e7eb;
    padding: 16px 32px;
    text-align: center;
    font-size: 16px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    border-radius: 8px;
    border: none;
    text-decoration: none;
}

button:hover {
    background-color: white;
    color: #0d47ba;
    border: 1px #adb7c9;
    border-style: solid;
}

.btn {
    margin: 15px;
    margin-left: 100px;
    width: 200px;
    height: 55px;
}

.v3D {
    float: left;
    margin-left: 100px;
    margin-top: 20px;
}

canvas {
    padding-left: 0;
    padding-right: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin: auto;
    display: block;
}

.column {
    float: left;
    width: 50%;
    flex: 50%;
    align-self: center;
}

.row {
    display: flex;
    margin: 50px;
    align-self: center;
}

.row:after {
    content: "";
    display: table;
    clear: both;
}