body {
    font-family: Arial, sans-serif;
    padding: 20px;
}

/* Định dạng khung 1 */
.box-message {
    background-color: #fffacd;
    border: 2px solid #00008b;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: justify;
}

.title-red {
    color: #b22222;
    text-align: center;
    margin-top: 0;
}

.box-message p {
    font-size: 16px;
    line-height: 1.5;
    margin: 0;
}

/* Định dạng khung 2 */
.box-lesson {
    background-color: #4b0082;
    color: white;
    border: 2px solid #8a2be2;
    border-radius: 8px;
    padding: 20px;
    text-align: justify;
    display: flex;
    align-items: center;
}

.content-wrapper {
    flex: 1;
}

.title-yellow {
    color: #ffd700;
    text-align: center;
    margin-top: 0;
}

.box-lesson p {
    font-size: 16px;
    line-height: 1.5;
    margin: 0;
    padding: 0 20px;
}