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

.game-board{
    width: 100%;
    height: 100vh;
    border-bottom: 10px solid #00D600;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: linear-gradient(#87CEEB, #E0F6FF);
}

.pipe {
    position:absolute;
    bottom: 0;
    width: 80px;
    right:-80px;
    height:60;
    animation: pipe-animation 2s infinite linear;
}

.score{
    right: 5px;
    top: 5px;
    position: absolute;
    z-index: 5;
    font-size: 18px;
}

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

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

.clouds{
    position: absolute;
    width: 550px;
    animation: clouds-animation 20s infinite linear;
}

.button-container{
    display: none;
    position: fixed;
    z-index: 10;
    left: 50%;
    top: 50%;
}

.button-container button{
    background-color: #4285F4;
    color:white;
    padding: 10px;
    font-weight: bold;
    border: none;
    outline: none;
    border-radius: 3px;
    font-size: 18px;
}

.button-container button:hover{
    opacity: 0.7;
}

.button-container button:active{
    opacity: 0.7;
}

@keyframes clouds-animation {
    from{
        right: -550px;
    }
    to{
        right: 100%;
    }
}

@keyframes mario-jump-animation{
    0%{
        bottom: 0;
    }
    40%{
        bottom: 180px;
    }
    50%{
        bottom: 180px;
    }
    60%{
        bottom: 180px;
    }
    100%{
        bottom: 0;
    }
}

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

    to {
        right: 100%;
    }
}