body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-color: rgba(31, 31, 31, 1);
}

.icon-box {
    color: rgba(255, 255, 255, .5);
    width: 24px;
    height: 24px;
    transition: all .5s;
}

#fullscreen {
    bottom: 16px;
    right: 20px;
    position: fixed;
    padding: 8px;
    border-radius: 8px;
    transition: all .5s;
}

#download {
    bottom: 16px;
    right: 64px;
    position: fixed;
    padding: 8px;
    border-radius: 8px;
    transition: all .5s;
}

#next {
    bottom: 16px;
    right: 108px;
    position: fixed;
    padding: 8px;
    border-radius: 8px;
    transition: all .5s;
}

#download:hover,
#fullscreen:hover,
#next:hover {
    box-shadow: 0 0 4px 0 rgba(0, 0, 0, .2);
    background-color: rgba(255, 255, 255, .4);
    transition: all 0.3s;
}

#fullscreen:hover .icon-box,
#download:hover .icon-box,
#next:hover .icon-box {
    color: rgba(0, 0, 0, .2);
    transition: all 0.3s;
}

#download:active,
#fullscreen:active,
#next:active {
    background-color: rgba(255, 255, 255, .5);
    box-shadow: none;
}