*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.game-board{
    width: 100%;
    height: 500px;
    border-bottom: 15px solid rgb(35, 160, 35);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: linear-gradient(#87ceeb, #e0f6ff);
}

.pipe{
    position: absolute;
    bottom: 0;
    width: 80px;
    right: -80px;
    animation: pipe-animation 1.5s infinite linear;
}

.mario {
    position: absolute;
    width: 150px;
    bottom: 0;
}

.jump{
    animation: jump 500ms ease-out;
}

.clouds{
    width: 550px;
    position: absolute;
    animation: clouds-animation 40s infinite linear;
}

@keyframes pipe-animation{
    from {
        right: -80px;
    }

    to {
        right: 100%;
    }
}

@keyframes jump{
    0% {
        bottom:0;
    }
    40% {
        bottom:250px;
    } 
    
    50% {
        bottom:250px;
    }
    60% {
        bottom:250px;
    }
    100% {
        bottom:0;
    }
}

@keyframes clouds-animation{
    from {
        right: -550px;
    }

    to {
        right: 100%;
    }
}