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

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;
}

h1 {
    display:flex;
    justify-content: center;
}