index.css

body {
    margin: 0;
    padding: 0;
}

.site {
    position: absolute;
    left: 200px;
    top: 200px;
    width: 200px;
    height: 360px;
    background-color: black;
}

.activityModel {
    border: 1px;
    width: 19px;
    height: 19px;
    background: red;
    position: absolute;
}

.inactiveModel {
    border: 1px;
    width: 19px;
    height: 19px;
    position: absolute;
    background-color: gray;
}

.restart {
    padding: .3em .8em;
    border: 1px solid rgba(0, 0, 0, .1);
    background: #58a linear-gradient(hsla(0, 0%, 100%, .2), transparent);
    border-radius: .2em;
    box-shadow: 0 .05em .25em rgba(0, 0, 0, .5);
    color: white;
    text-shadow: 0 -.05em .05em rgba(0, 0, 0, .5);
    font-size: 125%;
    line-height: 1.5;
    text-align: center;
    width: 125px;
    z-index: 11;
    left: 220px;
    top: 380px;
    position: absolute;
    display: none;
}