@media screen and (max-width: 600px) {
    .img_grammar {
        width: 85px;
    }
    .block_img {
        margin-right: 20px;
    }
    h1 {
        font-size: 16px;
        margin-bottom: 22px;
    }

    body {
        background-color: #f5efe3;
        max-width: 1100px;
        margin: 17px auto 7px;
        padding: 7px;
    }
    .book_content , .btn_green, .btn_blue{
        font-size: 12px;
    }
    .btn_blue {
        float: unset;
    }
    .block_1_audio, .block_2_audio {
        width: 100%;
    }
    .block_2_audio {
        margin-left: 0;
    }
    .all_audio {
        display: block;
    }
    .title_audio {
        background-color: white;
        padding: 10px;
        border-radius: 5px;
        width: 138px;
        min-width: 136px;
        display: inline-table;
        font-size: 13px;
    }
}