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

.game-board {
    width: 100%;
    height: 500px;
    border-bottom: 10px solid rgb(60, 201, 72);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: linear-gradient(#87ceeb, #e0f6ff);
}

.pipe{
    position: absolute;
    bottom: 0;
    width: 70px;
    right: -80px;
    animation: pipe-animation 1.5s infinite linear;
}

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

.nuvens {
    width: 800px;
    position: absolute;
    animation: nuvens-animation 10s infinite linear;
}

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

.reset {
    display: block;
    margin-left: auto;
    margin-right: auto;

    border-radius: 100%;
    font-size: 50px;
    background-color: transparent;

}

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

    to {
        right: 100%;
    }
}

@keyframes jump {
    0% {
        bottom: 0;
    }

    40% {
        bottom: 180px;
    }

    50% {
        bottom: 180px;
    }

    60% {
        bottom: 180px;
    }

    70% {
        bottom: 180px;
    }

    100% {
        bottom: 0;
    }
}

@keyframes nuvens-animation {
    from {
        right: -800px;
    }

    to {
        right: 100%;
    }
}