body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    /*background-image: url('../images/background.jpg');  */
    background-color: rgb(131,169,22);  
    background-color: rgba(131,169,22,1);  
    background-repeat: no-repeat; 
    background-size: cover; 
    background-size: auto; 
    background-attachment: fixed;
}

video {
    position: absolute;
    max-width: 100%;
    max-height: 100%;
    height: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.back-button, .stop, .replay{
    display: none;
}

#stop_button, #replay_button {
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translate(-50%, -55%);
    width: 80px;
    height: 80px;
}

.back-button{
    position: absolute;
    bottom:30px;
    left:50%;
    transform: translateX(-50%);
    font-size: 21px;
    color:#004A9A;
    text-decoration: none;
}

.back-button img{
    margin-right:20px;
}

.play, .replay .stop{
    position: absolute;
    top:50%;
    left:50%;
    transform: translate(-50%, -50%);
}