animated-emoji-character-boxes/styles.css

*,
*::before,
*::after {
    box-sizing: inherit;
}

* {
    margin: 0;
    padding: 0;
}

html {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;

    min-height: 100vh;
    min-width: 100vw;
    overflow: hidden;

    transition: 1s ease-in-out;
}


.box {
    position: absolute;
    display: grid;
    place-content: center;
    font-size: 5rem;
    min-width: 2rem;
    min-height: 2rem;
    border-radius: 50%;

    transition: 1s ease-in-out;
}