body {
    background-color: olivedrab;
    color: white;
}

h2 {
    text-align: center;
}

.clocks {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.countdown {
    text-align: center;
    font-size: 60px;
    margin-bottom: 0px;
}

.topnav {
    background-color: #333;
    overflow: hidden;
}

.topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

.topnav a:hover {
    background-color: #ddd;
    color: black;
}

.topnav a.active {
    background-color: #04aa6d;
    color: white;
}

.clock {
    border: double;
    height: 100;
    width: 300;
}

.video {
    width: 500px;
    height: 500px;
}