* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
#canvas1 {
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    background: url('./img/background1920x1080.png');
    background-size: cover;
    background-position: center;
}
.controls {
    position: absolute;
    left: 5px;
    bottom: 5px;
    display: flex;
    flex-direction: column;
}
.controls > button {
    width: 50px;
    height: 50px;
    background: transparent;
    color: white;
    font: 30px Bangers;
    border: 1px solid white;
    margin: 5px;
    box-shadow: 1px 1px 1px black;
    text-shadow: 1px 1px 1px black;
    transition: 0.3s;
}
.controls > button:hover, .controls > button:active, .controls > button:focus {
    background: #7a2c8a;
    box-shadow: 4px 4px 4px black;
    text-shadow: 2px 2px 2px black;
}

.assets {
    display: none;
}

@media screen and (max-width: 900px){
    #canvas1 {
        background: url('./img/background1080x1920.png');
        background-size: cover;
        background-position: center;
    }
}