body {
    background: #f2f2f2;
    font-family: sans-serif;
}

iframe {
    display: block;
    position: absolute;
    left: 0;
    top: 60px;
    width: 61.8%;
    height: calc(100% - 60px);
    border: 0;
}

.options,
.select {
    display: block;
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translate(-50%);
    z-index: 1;
}
.select {
    bottom: 20px;
}

.options li {
    display: inline-block;
    margin: 0 10px;
    width: 40px;
    height: 40px;
    border: 4px solid transparent;
    border-radius: 50%;
    text-indent: -1000px;
    overflow: hidden;
    cursor: pointer;
}

.options li.selected {
    border: 4px solid white;
}
.options li.lightblue {
    background: #70C0E7;
}
.options li.green {
    background: #80B845;
}
.options li.red {
    background: #C74334;
}
.options li.blue {
    background: #2C4463;
}