.lesson {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
}

.lesson-title {
    margin-top: 0;
    font-size: 32px;
    line-height: 1.2;
}

.lesson-content {
    font-size: 18px;
    line-height: 1.7;
}

.lesson-content h2 {
    margin-top: 32px;
    font-size: 24px;
}

.listen-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.listen-controls button {
    border: 0;
    border-radius: 8px;
    padding: 10px 14px;
    cursor: pointer;
    font-size: 15px;
}

.lesson-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.lesson-navigation a {
    text-decoration: none;
    font-weight: 600;
}

@media (max-width: 600px) {
    .lesson {
        padding: 18px;
        border-radius: 8px;
    }

    .lesson-title {
        font-size: 27px;
    }

    .lesson-content {
        font-size: 17px;
    }
}