html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #b0e079;
    margin: 0;
    padding: 0;
}

.help {
    position: absolute;
    top: 0;
    left: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    padding: 15px;
}

.gameover {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
}

.gameover img {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    animation: fadeIn 1s ease-in-out;
}

.gameover div {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: fadeIn 1s ease-in-out;
    color: white;
}

.gameover h1 {
    text-align: center;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 70px;
    color: white;
    text-transform: uppercase;
}



.notSupport {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
}

.notSupport img {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    animation: fadeIn 1s ease-in-out;
}

.notSupport div {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: fadeIn 1s ease-in-out;
    color: white;
}

.notSupport h1 {
    text-align: center;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 70px;
    color: white;
    text-transform: uppercase;
}


.gamestart {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.5);
}

.gamestart img {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    animation: fadeIn 1s ease-in-out;
}

.gamestart div {
    position: absolute;
    top: 65%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    animation: fadeIn 1s ease-in-out;
    color: white;
}

.gamestart div span {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px;
    border-radius: 5px;
}