* {
    font-family: Arial, Helvetica, sans-serif;
}

body {
    text-align: center;
    margin: 0;
    background-color: pink;
}

h1 {
    font-size: 9rem;
    margin: 0;
}

h2 {
    color: #444
}

p {
    margin: 0
}

.invisible {
    display: none;
}

section {
    width: 35vw;
    height: auto;
    background: rgb(255, 233, 237);
    margin: 20px;
    padding: 5px;
    border-radius: 5px;
    border: 2px dotted black;
    text-align: left;
    display: flex;
    flex-direction: column;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    margin: 0;
}

footer {
    background: #333;
    color: white;
    padding-top: 1rem;
    padding-bottom: 1rem;
    width: 100%;
}

div.correct::before {
    content: "Correct! ✅";
}

div.correct {
    padding-bottom: 10px;
}

div.wrong::before {
    content: "Wrong 🙅";
    padding-bottom: 5px;
}

div.wrong {
    padding-bottom: 10px;
}

div.mean::before {
    content: "yêu nghiêng 😞";
    padding-bottom: 5px;
}

div.mean {
    padding-bottom: 10px;
}