body {
    background: #fafafa;
    width: 98%;
}

.botao {
    padding: 3px;
    margin-left: 48%;
}

.dino {
    width: 60px;
    height: 60px;
    background-image: url('img/dino.png');
    position: absolute;
    bottom: 0;
}

.cactus {
    position: absolute;
    width: 60px;
    height: 60px;
    bottom: 0;
    background-image: url('img/cactus.png');
}

.game-over {
    text-align: center;
    color: #666666;
    margin-top: 50px;
    font-family: arial;
}

@keyframes slideright {
    from {
        background-position: 70000%;
    }

    to {
        background-position: 0;
    }
}

.background {
    position: absolute;
    bottom: 0;
    background-image: url('img/background.png');
    background-repeat: repeat-x;
    animation: slideright 600s infinite linear;
    width: 99%;
    height: 200px;
}