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

body 
{
    display:flex;
    flex-direction: column;
    justify-content:center;
    align-items:center;
    height: 100vh;
}

.emoji 
{
    font-size: 10rem;
    cursor: pointer;
    user-select: none;
}

.closed 
{
    display: none;
}

.open 
{
    display: none;
}

.active 
{
    display: block;
}