*, *::before, *::after{
    box-sizing: border-box;
    user-select: none;
}
body{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.world{
    overflow: hidden;
    position: relative;
}
.score{
    position: absolute;
    font-size: 3vmin;
    right: 1vmin;
    top: 1vmin;
}
.start-screen{
    position: absolute;
    font-size: 4vmin;
    color: rgb(126, 0, 0);
    top: 50%;
    left: 50%;
    transform: translate(-50%);
    font-family: 'Sigmar', cursive;
}
.hide{
    display: none;
}
.ground{
    position: absolute;
    width: 300%;
    bottom: 0;
    left: calc(var(--left) * 1%);
}
.dino{
    --bottom: 0;
    position: absolute;
    left: 1%;
    height: 30%;
    bottom: calc(var(--bottom) * 1%);
}
.cactus{
    position: absolute;
    left: calc(var(--left) * 1%);
    height: 30%;
    bottom: 0;

}