.fourth_game .square {
    width: 50px;
    height: 50px;
    background-color: #3498db;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px;
    cursor: pointer;
}
.fourth_game .square-container {
    display: flex;
    flex-wrap: wrap;
    width: 300px;
}
.fourth_game .drop-box {
    max-width: 300px;
    height: 150px;
    border: 2px dashed #2ecc71;
    display: flex;
    flex-wrap: wrap;
    padding: 10px;
    margin: 20px auto;
}
.fourth_game .correct {
    background-color: #2ecc71;
}
.fourth_game .incorrect {
    background-color: #e74c3c;
}
.fourth_game .btn {
    margin-top: 24px;
}
.fourth_game h1 {
    font-size: 24px;
    text-align: center;
}