style.css

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

:root {
    --orange: #fab22a;
}

body {
    background-color: var(--orange);
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: black;
    width: 80vmin;
    padding: 3rem 2rem;
    border-radius: 0.5rem;
    box-shadow: 1.5rem 1.5rem 3rem rgba(97, 63, 0, 0.4);
    /*Centering the container */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);  
}

#laugh-emoji {
    font-size: 3rem;
}

#joke-container {
    margin: 1rem 0 2rem 0;
    text-align: center;
    word-wrap: break-word;
    line-height: 1.5rem;
    font-size: 1rem;
    color: whitesmoke;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#button {
    background-color: var(--orange);
    color: black;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 1.125rem;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    opacity: 0.9;
}

#button:hover {
    cursor: pointer;
    opacity: 1;
    transition: 0.5s;
}

/* Making it responsive */
/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 600px) {
    .container {
        width: 80vmin;
}}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    .container {
        width: 60vmin;
    }
}