* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: #fff;
    font-family: 'Times New Roman', Times, serif;
    overflow-wrap: break-word;
    height: 100%;
}

/* #region Header Styles */

header {
    display: flex;
    align-items: center;
    background: #e8e2ff;
    height: 150px;
    width: 100%;
}

.logo {
    height: 150px;
}

nav {
    display: flex;
    justify-content: center;  
    gap: 40px;
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    font-size: 35px;
}

nav a {
    color: #000;
    text-decoration: none;
}

nav a:hover {
    color: #4a267b;
}

.login {
    color: #000;
    text-decoration: none;
    border: 1px solid #000;
    padding: 10px 25px;
    border-radius: 8px;
    margin: 0 20px;
    font-size: 20px;
    width: 270px;
    text-align: center;
    transition: .2s;
}

.login:hover {
    background-color: #4a267b ;
    color: #fff;
}

/* #endregion Header Styles */

/* #region Главная страница инфа*/
.info{
    height: 400px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.info h1 {
    display: flex;
    justify-content: center;
    color: #000;
    font-size: 40px;
    padding: 20px 0 0px 0;
}

.info p {
    display: flex;
    text-align: justify;
    color: #000;
    padding: 20px 0 10px 0;
    font-size: 24px;
    margin-left: 20px;
}

.main-page-about-right{
    display:flex;
    align-items:center;
    position:relative;
}

.social-buttons{
    display:flex;
    flex-direction:column;
    gap:50px;
    position:relative;
    left:100px;     
    z-index:2;
}

.about-image{
    height: 400px;
    position:relative;
    z-index:1;
}

.main-page-button{
    background-color: #e8e2ff;
    color: #000;
    text-decoration: none;
    border: 1px solid #000;
    padding: 10px 25px;
    border-radius: 8px;
    width: 250px;
    text-align: center;
    font-size: 20px;
    transition: .2s;
}

.main-page-button:hover{
    background-color: #efa0c7;
    color: #000;
}

.switch-to-english {
    background-color: #e8e2ff;
    color: #000;
    text-decoration: none;
    border: 1px solid #000;
    padding: 10px 25px;
    border-radius: 8px;
    width: 250px;
    text-align: center;
    font-size: 20px;
    transition: .2s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hover-text {
    display: none;
}

.switch-to-english:hover {
    background-color: #efa0c7;
}

.switch-to-english:hover .default-text {
    display: none;
}

.switch-to-english:hover .hover-text {
    display: inline;
}

/* #endregion Главная страница инфа*/

/* #region Главная страница темы статей и исследований*/

#themes-header{
    margin: 10px;
    margin-top: 35px;
    font-size: 40px;
    font-weight: bold;
}

.research-topics {
    width: 90%;
    max-width: 1200px;
    margin: 70px auto;
}

.topics-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    column-gap: 45px;
}

.topic-link {
    display: grid;
    grid-template-columns: 35px 1fr 25px;
    align-items: center;

    min-height: 60px;

    color: #000;
    text-decoration: none;

    border-bottom: 1px solid #000;

    transition: background-color 0.2s,
                padding-left 0.2s;
}

.topic-number {
    font-size: 13px;
    color: #777;
}

.topic-name {
    font-size: 18px;
    line-height: 1.25;
}

.topic-arrow {
    font-size: 21px;
    text-align: right;
    transition: transform 0.2s;
}

.topic-link:hover {
    background-color: #e8e2ff;
    padding-left: 8px;
}

.topic-link:hover .topic-arrow {
    transform: translateX(5px);
}
/* #endregion Главная страница темы статей и исследований*/

/* #region QR Code Section */
.qr-code{
    height: 400px;
    width: 400px;
    margin: 50px auto;
    display: block;
}

.qr-code-text{
    text-align: center;
    font-size: 24px;
    margin-top: 50px;
}

.qr-code-text a{
    color: #4a267b;
    text-decoration: underline;
}

.qr-code-text a:hover{
    color: #efa0c7;
    text-decoration: underline;
}

/* #endregion QR Code Section */

/* #region About Rules Section */
.about-rules {
    cursor: pointer;
}

.about-rules-titles{
    margin: 20px;
    margin-top: 35px;
    font-size: 35px;
    text-align: center;
}

.about-rules-sec-p1{
    margin: 20px;
    font-size: 24px;
    background-color: #ffd4b3;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #000;
}

.about-rules-sec-p2{
    margin: 20px;
    font-size: 24px;
    background-color: #e8e2ff;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #000;
}

.about-rules-sec-p1 p, .about-rules-sec-p2 p{
    margin: 10px 0;
}

.about-rules-sec-p1 ol, .about-rules-sec-p2 ol{
    margin: 10px 0;
    padding-left: 20px;
}

.about-rules-sec-p2 a{
    color: #4a267b;
    text-decoration: none;
}

.about-rules-sec-p2 a:hover{
    color: #4a267b;
    text-decoration: underline;
}

/* #endregion About Rules Section */

/* #region Research All Themes Section */

.research-themes-dropdown {
    width: 90%;
    max-width: 1200px;
    margin: 50px auto;
}


/* ---------- ЗАГОЛОВОК ---------- */

.research-all-themes-titles {
    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 18px 5px;

    font-size: 30px;
    cursor: pointer;

    border-top: 1px solid #000;
    border-bottom: 1px solid #000;

    list-style: none;
}


/* Убираем стандартный треугольник браузера */

.research-all-themes-titles::-webkit-details-marker {
    display: none;
}


/* Стрелка справа */

.research-themes-arrow {
    font-size: 28px;

    transition: transform 0.2s;
}


/* Когда меню открыто */

.research-themes-dropdown[open] .research-themes-arrow {
    transform: rotate(180deg);
}


/* ---------- СПИСОК ТЕМ ---------- */

.research-topics-dropdown {
    display: grid;

    grid-template-columns: repeat(3, 1fr);

    column-gap: 45px;

    margin-top: 20px;
}


/* ---------- ОДНА ТЕМА ---------- */

.research-topic-link {
    display: grid;

    grid-template-columns: 35px 1fr 25px;

    align-items: center;

    min-height: 60px;

    color: #000;
    text-decoration: none;

    border-bottom: 1px solid #000;

    transition:
        background-color 0.2s,
        padding-left 0.2s;
}


/* Номер */

.research-topic-number {
    font-size: 13px;
    color: #777;
}


/* Название */

.research-topic-name {
    font-size: 17px;
    line-height: 1.25;
}


/* Стрелка */

.research-topic-arrow {
    font-size: 21px;
    text-align: right;

    transition: transform 0.2s;
}


/* Наведение */

.research-topic-link:hover {
    background-color: #e8e2ff;
    padding-left: 8px;
}

.research-topic-link:hover .research-topic-arrow {
    transform: translateX(5px);
}


/* ---------- МОБИЛЬНАЯ ВЕРСИЯ ---------- */

@media (max-width: 600px) {

    .research-themes-dropdown {
        width: calc(100% - 30px);
        margin: 35px auto;
    }

    .research-all-themes-titles {
        font-size: 25px;
        padding: 15px 5px;
    }

    .research-themes-arrow {
        font-size: 24px;
    }

    .research-topics-dropdown {
        grid-template-columns: 1fr;
        column-gap: 0;
        margin-top: 10px;
    }

    .research-topic-link {
        grid-template-columns: 35px 1fr 25px;
        min-height: 58px;
    }

    .research-topic-name {
        font-size: 16px;
    }

}


/* #endregion Research All Themes Section */

/* #region карточка статьи*/

.research-layout{
    width: 95%;
    margin: 20px auto;
    padding: 30px;
    border: 1px solid #989898;
    border-radius: 15px;
    background-color: #fff;
    margin-bottom: 35px;
    background-color: #f2f0fc;
}

/* Верхняя часть */

.research-head{
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
}

.research-left{
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* Название */

.name-short-inf{
    margin: 0;
    font-size: 40px;
    font-weight: bold;
}

/* Строка: опубликовано | категория | автор */

.info-line{
    display: flex;
    align-items: center;
    gap: 100px;
    flex-wrap: wrap;
}

/* Общие стили */

.info-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    row-gap:25px;
    column-gap:60px;
    margin-top:25px;
    padding-bottom:30px;
    border-bottom:1px solid #d8d8d8;   /* линия над ключевыми словами */
}

.author-section,
.category-section,
.date-section,
.theme-section,
.language-section{
    display:flex;
    align-items:center;
    gap:8px;
}

.author-short,
.category-short,
.date-short,
.theme-short,
.language-short {
    margin:0;
    font-size:20px;
    font-weight: bold;
}

.author-short-inf,
.category-short-inf,
.date-short-inf,
.theme-short-inf,
.language-short-inf {
    margin:0;
    font-size:20px;
}

/* Кнопка */

.button-read{
    padding: 8px 20px;
    font-size: 20px;
    border: 1px solid #4a267b;
    border-radius: 8px;
    background-color: #e8e2ff;
    color: #4a267b;
    cursor: pointer;
    transition: .2s;
    white-space: nowrap;
    flex-shrink: 0;
    width: 100px;
    height: 45px;
    text-align: center;
    text-decoration: none;
}

.button-read:hover{
    background-color: #4a267b;
    color: #fff;
}

/* Аннотация */

.keywords-section{
    display:grid;
    grid-template-columns:260px 1fr;
    align-items:start;
    padding:30px 0;
    border-bottom:1px solid #d8d8d8;   /* линия под ключевыми словами */
}

.annotation-short{
    margin-bottom: 10px;
    font-size: 25px;
    font-weight: bold;
    margin-top: 15px;
}

.annotation-short-inf{
    margin: 0;
    line-height: 1.5;
    text-align: justify;
    font-size: 20px;
}

.keywords-section{
    display:grid;
    grid-template-columns:260px 1fr;
    align-items:start;
    padding:30px 0;
    border-bottom:1px solid #d8d8d8;   /* линия под ключевыми словами */
}

.keywords-short{
    margin: 0;
    font-size: 20px;
    font-weight: bold;
}

.keywords-short-inf{
    margin: 0;
    font-size: 20px;
}

/* #endregion карточка статьи*/

/* #region полная страница статьи*/

.article-page {
    width: 95%;
    max-width: 1600px;
    margin: 45px auto 80px;
}

/*КНОПКА НАЗАД */

.back-button {
    display: inline-block;
    margin-bottom: 40px;
    font-size: 22px;
    color: black;
    text-decoration: none;
    transition: .2s;
    border: 1px solid #4a267b;
    background-color: #e8e2ff;
    border-radius: 8px;
    padding: 8px 20px;
}

.back-button:hover {
    color: #fff;
    background-color: #4a267b;
}

.article-layout {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 55px;
    align-items: start;
}

.article-content {
    width: 100%;
}

/*ЗАГОЛОВОК */

.article-title {
    font-size: 58px;
    font-weight: normal;
    margin-bottom: 45px;
    line-height: 1.1;
}

/*   ОБЩИЕ КАРТОЧКИ */

.article-card {
    background: #f2f0fc;
    border: 1px solid #d7d7d7;
    border-radius: 24px;
    padding: 30px 35px;
    margin-bottom: 30px;
    transition: .25s;
}

/*АННОТАЦИЯ*/

.article-annotation {
    background: #f2f0fc;
}

.article-annotation h2 {
    font-size: 34px;
    margin-bottom: 20px;
    font-weight: normal;
}

.article-annotation p {
    font-size: 22px;
    line-height: 1.4;
}


/*ИНФОРМАЦИЯ */

.article-information {
    display: flex;
    justify-content: space-between;
    gap: 65px;
}

.information-column {
    width: 50%;
}

.information-row {
    display: flex;
    margin-bottom: 18px;
    align-items: center;
}

.information-row:last-child {
    margin-bottom: 0;
}

.information-row span {
    width: 170px;
    font-size: 22px;
    font-weight: bold;
}

.information-row p {
    font-size: 22px;
}

/* КАРТОЧКА АВТОРА */

.author-card {
    position: sticky;
    top: 10px;
    border: 1px solid #d7d7d7;
    border-radius: 24px;
    padding: 15px;
    background: #f2f0fc;
}

.author-card h2 {
    text-align: center;
    font-size: 44px;
    font-weight: normal;
    margin-bottom: 10px;
}

/* ФОТО */

.author-photo {
    display: block;
    width: 150px;
    height: 150px;
    margin: auto;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid #d7d7d7;
}

/* ФИО */

.author-card h3 {
    text-align: center;
    font-size: 30px;
    font-weight: normal;
    margin-top: 20px;
    margin-bottom: 30px;
}

/* БЛОКИ АВТОРА */

.author-block {
    margin-bottom: 15px;
}

.author-block:last-child {
    margin-bottom: 0;
}

.author-block h4 {
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: normal;
}

.author-block-icons {
    display: flex;
}

.author-icon {
    width: 25px;
    height: 25px;
    margin-right: 10px;
}

.author-block p {
    font-size: 20px;
    line-height: 1.4;
}

.author-block ul {
    padding-left: 25px;
}

.author-block li {
    font-size: 20px;
    margin-bottom: 10px;
}

.author-email {
    text-align: center;
    font-size: 17px;
    color: #666;
    margin-top: -15px;
    margin-bottom: 20px;
}

/* ОСНОВНОЙ ТЕКСТ СТАТЬИ */

.article-text {
    margin-top: 50px;
    width: 90%;
    font-size: 22px;
    line-height: 1.5;
    color: #000;
}

/* ЗАГОЛОВКИ */

.article-text h2 {
    font-size: 38px;
    font-weight: normal;
    margin-top: 65px;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 1px solid #dddddd;
}


.article-text h3 {
    font-size: 30px;
    font-weight: normal;
    margin-top: 45px;
    margin-bottom: 20px;
}


.article-text h4 {
    font-size: 26px;
    font-weight: normal;
    margin-top: 35px;
    margin-bottom: 15px;
}

/* АБЗАЦЫ */

.article-text p {
    margin-bottom: 22px;
    text-align: justify;
    margin-left: 20px;
}


/* ССЫЛКИ*/

.article-text a {
    color: #4a267b;
    text-decoration: none;
    transition: .2s;
}

.article-text a:hover {
    text-decoration: underline;
}


/* СПИСКИ */

.article-text ul,
.article-text ol {
    margin: 25px 0 30px 35px;
}

.article-text li {
    margin-bottom: 12px;
    line-height: 1.8;
}

/* ЦИТАТА */

.article-text blockquote {
    margin: 45px 0;
    padding: 30px 35px;
    background: #f7f5ff;
    border-left: 6px solid #bba9ff;
    border-radius: 18px;
    font-size: 24px;
    font-style: italic;
    line-height: 1.8;
}

/* ИЗОБРАЖЕНИЯ */

.article-text img {
    display: block;
    width: 70%;
    max-width: 850px;
    margin: 45px auto;
    border-radius: 18px;
}

.article-text figure {
    margin: 50px auto;
    text-align: center;
}

.article-text figcaption {
    margin-top: 15px;
    font-size: 18px;
    color: #666;
}

/* ТАБЛИЦЫ */

.article-text table {
    width: 100%;
    margin: 45px 0;
    border-collapse: collapse;
}

.article-text th {
    background: #f5f2ff;
    padding: 12px;
    border: 1px solid #dddddd;
    font-size: 22px;
    font-weight: bold;
}

.article-text td {
    padding: 12px;
    border: 1px solid #dddddd;
    font-size: 21px;
}

.article-text tr:nth-child(even) {
    background: #fafafa;
}

/* КОД */

.article-text code {
    padding: 3px 8px;
    background: #efefef;
    border-radius: 6px;
    font-size: 20px;
}

.article-text pre {
    overflow-x: auto;
    padding: 25px;
    margin: 35px 0;
    border-radius: 15px;
    background: #f3f3f3;
}

/* РАЗДЕЛИТЕЛЬ */

.article-text hr {
    margin: 60px 0;
    border: none;
    border-top: 1px solid #dddddd;
}

/* ВЫДЕЛЕНИЕ */

.article-text strong {
    font-weight: bold;
}

.article-text em {
    font-style: italic;
}

/* ВЫДЕЛЕНИЕ ТЕКСТА */

::selection {
    background: #ddd2ff;
}


/* СНОСКИ */

.article-text sup {
    font-size: 15px;
}

/* #endregion полная страница статьи*/

/* #region МОБИЛЬНАЯ АДАПТАЦИЯ Применяется только на экранах шириной до 600px */

@media (max-width: 600px) {

    /* ---------- ОБЩЕЕ ---------- */

    body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
        font-size: 16px;
    }

    /* ---------- HEADER ---------- */

    header {
        height: auto;
        min-height: 110px;
        width: 100%;
        padding: 15px 10px;
        flex-direction: column;
        justify-content: center;
        gap: 15px;
    }

    .logo {
        height: 70px;
        width: auto;
        max-width: 180px;
        object-fit: contain;
    }

    nav {
        width: 100%;
        flex: none;
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
        gap: 10px 18px;
        font-size: 20px;
    }

    nav a {
        white-space: nowrap;
    }

    .login {
        width: min(100%, 270px);
        margin: 0;
        padding: 9px 15px;
        font-size: 18px;
    }


    /* ---------- ГЛАВНАЯ: INFO ---------- */

    .info {
        height: auto;
        min-height: 0;
        width: 100%;
        padding: 0 15px 25px;
        flex-direction: column;
        align-items: center;
        gap: 25px;
    }

    .info h1 {
        font-size: 30px;
        line-height: 1.15;
        padding: 20px 0 0;
        text-align: center;
    }

    .info p {
        display: block;
        width: 100%;
        margin: 0;
        padding: 10px 0;
        font-size: 18px;
        line-height: 1.45;
        text-align: justify;
    }

    .main-page-about-right {
        width: 100%;
        flex-direction: column;
        justify-content: center;
    }

    .social-buttons {
        width: 100%;
        left: 0;
        gap: 15px;
        align-items: center;
        order: 2;
    }

    /* Главная картинка скрывается только на мобильном.
       Логотип в header этим правилом не затрагивается. */
    .about-image {
        display: none;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 300px);
        font-size: 18px;
        padding: 10px 15px;
    }


    /* ---------- ТЕМЫ НА ГЛАВНОЙ ---------- */

    #themes-header {
        margin: 25px 15px 15px;
        font-size: 30px;
        line-height: 1.2;
        text-align: center;
    }

    .main-page-themes-menu {
        width: auto;
        margin: 20px 15px 35px;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        align-items: stretch;
    }

    .main-page-themes-menu li {
        width: 100%;
        min-height: 58px;
        height: auto;
        padding: 10px 8px;
        font-size: 16px;
        line-height: 1.15;
    }


    /* На очень маленьких телефонах возвращаем темы в одну колонку,
       чтобы длинные названия не становились слишком тесными. */
    @media (max-width: 360px) {
        .main-page-themes-menu,
        .research-all-themes-menu {
            grid-template-columns: 1fr;
        }
    }


    /* ---------- QR CODE ---------- */

    .qr-code {
        width: min(80vw, 300px);
        height: auto;
        margin: 30px auto;
    }

    .qr-code-text {
        padding: 0 15px;
        font-size: 18px;
        line-height: 1.4;
        margin-top: 25px;
    }


    /* ---------- ABOUT / RULES ---------- */

    .about-rules-titles {
        margin: 25px 15px;
        font-size: 28px;
        line-height: 1.2;
    }

    .about-rules-sec-p1,
    .about-rules-sec-p2 {
        margin: 15px;
        padding: 20px;
        font-size: 18px;
        line-height: 1.5;
    }

    .about-rules-sec-p1 ol,
    .about-rules-sec-p2 ol {
        padding-left: 25px;
    }


    /* ---------- СПИСОК ВСЕХ ИССЛЕДОВАНИЙ ---------- */

    .research-all-themes-titles {
        margin: 25px 15px 20px;
        font-size: 28px;
        line-height: 1.2;
    }

    .research-all-themes-menu {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        margin: 15px;
    }

    .research-all-themes-menu li {
        width: 100%;
        height: auto;
        min-height: 42px;
    }

    .research-all-themes-elements {
        min-height: 42px;
        padding: 8px 6px;
        font-size: 14px;
        line-height: 1.15;
        text-align: center;
    }


    /* ---------- КАРТОЧКА ИССЛЕДОВАНИЯ ---------- */

    .research-layout {
        width: calc(100% - 20px);
        margin: 15px auto 25px;
        padding: 18px 15px;
        border-radius: 12px;
    }

    .research-head {
        flex-direction: column;
        gap: 20px;
    }

    .research-left {
        width: 100%;
        gap: 15px;
    }

    .name-short-inf {
        font-size: 28px;
        line-height: 1.2;
        overflow-wrap: anywhere;
    }

    .info-line {
        gap: 10px 20px;
    }

    .info-grid {
        grid-template-columns: 1fr;
        row-gap: 15px;
        column-gap: 0;
        margin-top: 15px;
        padding-bottom: 20px;
    }

    .author-section,
    .category-section,
    .date-section,
    .theme-section,
    .language-section {
        align-items: flex-start;
        flex-wrap: wrap;
        gap: 5px;
    }

    .author-short,
    .category-short,
    .date-short,
    .theme-short,
    .language-short,
    .author-short-inf,
    .category-short-inf,
    .date-short-inf,
    .theme-short-inf,
    .language-short-inf {
        font-size: 17px;
        overflow-wrap: anywhere;
    }

    .button-read {
        width: 100%;
        max-width: 140px;
        height: auto;
        min-height: 44px;
        padding: 8px 15px;
        font-size: 18px;
    }

    .keywords-section {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 20px 0;
    }

    .keywords-short,
    .keywords-short-inf {
        font-size: 17px;
        line-height: 1.45;
        overflow-wrap: anywhere;
    }

    .annotation-short {
        font-size: 21px;
        margin-top: 15px;
    }

    .annotation-short-inf {
        font-size: 17px;
        line-height: 1.5;
    }


    /* ---------- ПОЛНАЯ СТРАНИЦА СТАТЬИ ---------- */

    .article-page {
        width: calc(100% - 30px);
        max-width: none;
        margin: 25px auto 50px;
    }

    .back-button {
        margin-bottom: 25px;
        font-size: 18px;
        padding: 8px 15px;
    }

    /* На мобильном раскрываем содержимое article-content,
       чтобы карточку автора можно было поставить перед основным текстом. */
    .article-layout {
        display: grid;
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .article-content {
        display: contents;
    }

    .article-title {
        order: 1;
        font-size: 34px;
        line-height: 1.15;
        margin-bottom: 25px;
        overflow-wrap: anywhere;
    }

    .article-card {
        padding: 20px 15px;
        margin-bottom: 20px;
        border-radius: 15px;
    }

    /* Порядок на мобильном: заголовок → аннотация → информация → автор → основной текст */
    .article-annotation { order: 2; }
    .article-information { order: 3; }
    .author-card { order: 4; }
    .article-text { order: 5; }


    /* ---------- АННОТАЦИЯ ---------- */

    .article-annotation h2 {
        font-size: 27px;
        margin-bottom: 15px;
    }

    .article-annotation p {
        font-size: 18px;
        line-height: 1.5;
    }


    /* ---------- ИНФОРМАЦИЯ О СТАТЬЕ ---------- */

    .article-information {
        flex-direction: column;
        gap: 20px;
    }

    .information-column {
        width: 100%;
    }

    .information-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
        margin-bottom: 15px;
    }

    .information-row span {
        width: 100%;
        font-size: 18px;
    }

    .information-row p {
        font-size: 18px;
        overflow-wrap: anywhere;
    }


    /* ---------- АВТОР ---------- */

    .author-card {
        position: static;
        width: 100%;
        padding: 15px;
        border-radius: 15px;
    }

    .author-card h2 {
        font-size: 32px;
    }

    .author-photo {
        width: 120px;
        height: 120px;
    }

    .author-card h3 {
        font-size: 25px;
        overflow-wrap: anywhere;
    }

    .author-block h4 {
        font-size: 21px;
    }

    .author-block p,
    .author-block li {
        font-size: 17px;
        line-height: 1.5;
        overflow-wrap: anywhere;
    }

    .author-email {
        font-size: 15px;
        overflow-wrap: anywhere;
    }


    /* ---------- ОСНОВНОЙ ТЕКСТ СТАТЬИ ---------- */

    .article-text {
        margin-top: 30px;
        width: 100%;
        font-size: 18px;
        line-height: 1.6;
    }

    .article-text h2 {
        font-size: 27px;
        line-height: 1.25;
        margin-top: 45px;
        margin-bottom: 20px;
    }

    .article-text h3 {
        font-size: 23px;
        line-height: 1.3;
        margin-top: 35px;
        margin-bottom: 15px;
    }

    .article-text h4 {
        font-size: 20px;
        line-height: 1.3;
        margin-top: 30px;
        margin-bottom: 12px;
    }

    .article-text p {
        margin-left: 0;
        margin-bottom: 18px;
        text-align: left;
    }

    .article-text ul,
    .article-text ol {
        margin: 20px 0 25px 25px;
        padding-left: 10px;
    }

    .article-text li {
        margin-bottom: 10px;
        line-height: 1.6;
    }

    .article-text blockquote {
        margin: 30px 0;
        padding: 20px;
        border-left-width: 4px;
        border-radius: 12px;
        font-size: 18px;
        line-height: 1.6;
    }


    /* ---------- ИЗОБРАЖЕНИЯ В СТАТЬЯХ ---------- */

    .article-text img {
        width: 100%;
        max-width: 100%;
        height: auto;
        margin: 30px auto;
        border-radius: 12px;
    }

    .article-text figure {
        margin: 30px auto;
        max-width: 100%;
    }

    .article-text figcaption {
        font-size: 15px;
        line-height: 1.4;
    }


    /* ---------- ТАБЛИЦЫ ---------- */

    .article-text table {
        display: block;
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        margin: 30px 0;
        white-space: nowrap;
    }

    .article-text th {
        padding: 10px;
        font-size: 17px;
    }

    .article-text td {
        padding: 10px;
        font-size: 16px;
    }


    /* ---------- КОД ---------- */

    .article-text code {
        font-size: 16px;
        overflow-wrap: anywhere;
    }

    .article-text pre {
        max-width: 100%;
        overflow-x: auto;
        padding: 15px;
        margin: 25px 0;
        border-radius: 10px;
    }


    /* ---------- РАЗДЕЛИТЕЛЬ ---------- */

    .article-text hr {
        margin: 40px 0;
    }

    .article-text sup {
        font-size: 12px;
    }
}

@media (max-width: 600px) {

    .research-topics {
        width: calc(100% - 30px);
        margin: 45px auto;
    }

    #themes-header {
        font-size: 30px;
        margin-bottom: 25px;
    }

    .topic-link {
        grid-template-columns: 35px 1fr 30px;
        min-height: 62px;
        padding: 0 5px;
    }

    .topic-number {
        font-size: 12px;
    }

    .topic-name {
        font-size: 17px;
        line-height: 1.25;
    }

    .topic-arrow {
        font-size: 22px;
    }

    .topic-link:hover {
        padding-left: 10px;
    }
}

/* =========================================
   МОБИЛЬНАЯ ВЕРСИЯ ГЛАВНОЙ — ТЕМЫ
   ========================================= */

@media (max-width: 600px) {

    /* Заголовок */
    #themes-header {
        margin: 35px 15px 25px;
        font-size: 30px;
    }

    /* Общий контейнер тем */
    .themes {
        width: 100%;
        padding: 0 15px;
    }

    /*
       Каждый из твоих трёх блоков
       превращается в сетку 2 × 3
    */
    .main-page-themes-menu {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));

        gap: 10px;

        width: 100%;
        margin: 0 0 10px;
    }

    /* Отдельная тема */
    .main-page-themes-menu li {
        width: 100%;
        height: auto;
        min-height: 65px;

        padding: 8px;

        font-size: 16px;
        line-height: 1.2;

        display: flex;
        justify-content: center;
        align-items: center;

        text-align: center;
    }

    /* Ссылка занимает всю кнопку */
    .main-page-themes-menu li a {
        width: 100%;
        height: 100%;

        display: flex;
        justify-content: center;
        align-items: center;

        text-align: center;
    }
}


/* Очень маленькие телефоны */
@media (max-width: 360px) {

    .main-page-themes-menu {
        grid-template-columns: 1fr;
    }

    .main-page-themes-menu li {
        min-height: 55px;
        font-size: 16px;
    }

}
/* =========================================
   МОБИЛЬНАЯ ВЕРСИЯ — ТЕМЫ ПУБЛИКАЦИЙ
   ========================================= */

@media (max-width: 600px) {

    /* Сам блок тем */
    .research-topics {
        width: calc(100% - 30px);
        max-width: none;
        margin: 40px 15px;
        padding: 0;
    }

    /* Заголовок */
    #themes-header {
        margin: 0 0 25px 0;
        padding: 0;
        font-size: 30px;
        line-height: 1.2;
    }

    /* ВАЖНО:
       на телефоне только ОДНА колонка */
    .topics-list {
        display: grid;
        grid-template-columns: 1fr;
        width: 100%;
        gap: 0;
        margin: 0;
        padding: 0;
    }

    /* Одна тема */
    .topic-link {
        display: grid;
        grid-template-columns: 35px minmax(0, 1fr) 30px;

        width: 100%;
        min-width: 0;
        min-height: 62px;

        padding: 0 5px;

        box-sizing: border-box;
    }

    /* Номер */
    .topic-number {
        font-size: 12px;
    }

    /* Название */
    .topic-name {
        min-width: 0;

        font-size: 17px;
        line-height: 1.25;

        overflow-wrap: break-word;
    }

    /* Стрелка */
    .topic-arrow {
        font-size: 22px;
        text-align: right;
    }

    /* Убираем сильный сдвиг при наведении на телефоне */
    .topic-link:hover {
        padding-left: 8px;
    }
}

/* #endregion МОБИЛЬНАЯ АДАПТАЦИЯ Применяется только на экранах шириной до 600px */

/* =========================================================
   ФИНАЛЬНАЯ АДАПТАЦИЯ САЙТА ДЛЯ РАЗНЫХ УСТРОЙСТВ
   Этот блок добавлен в конец файла специально для того,
   чтобы переопределить более ранние мобильные правила.
   ========================================================= */

/* ---------------------------------------------------------
   НЕБОЛЬШИЕ НОУТБУКИ: 901–1200 px
   --------------------------------------------------------- */
@media (max-width: 1200px) and (min-width: 901px) {

    header {
        height: 120px;
    }

    .logo {
        height: 120px;
    }

    nav {
        gap: 25px;
        font-size: 28px;
    }

    .login {
        width: 220px;
        margin: 0 15px;
        font-size: 18px;
        padding: 9px 15px;
    }

    .info {
        height: auto;
        min-height: 360px;
    }

    .info h1 {
        font-size: 36px;
    }

    .info p {
        font-size: 21px;
        max-width: 600px;
    }

    .main-page-about-right {
        max-width: 50%;
    }

    .social-buttons {
        left: 30px;
        gap: 30px;
    }

    .about-image {
        height: 320px;
    }

    .main-page-button,
    .switch-to-english {
        width: 220px;
        font-size: 18px;
    }

    .research-topics,
    .research-themes-dropdown {
        width: 92%;
    }

    .topics-list,
    .research-topics-dropdown {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        column-gap: 25px;
    }

    .topic-name,
    .research-topic-name {
        font-size: 17px;
    }
}


/* ---------------------------------------------------------
   ПЛАНШЕТЫ: 601–900 px
   --------------------------------------------------------- */
@media (max-width: 900px) and (min-width: 601px) {

    html,
    body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    header {
        height: auto;
        min-height: 100px;
        padding: 12px 15px;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px 20px;
    }

    .logo {
        height: 85px;
        width: auto;
    }

    nav {
        order: 2;
        width: 100%;
        flex: none;
        gap: 15px 25px;
        font-size: 23px;
        flex-wrap: wrap;
    }

    .login {
        width: 200px;
        margin: 0;
        font-size: 17px;
    }

    .info {
        height: auto;
        min-height: 0;
        padding: 20px 25px 40px;
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(250px, 0.7fr);
        gap: 25px;
        align-items: center;
    }

    .info h1 {
        font-size: 34px;
        line-height: 1.15;
        padding: 10px 0;
        justify-content: flex-start;
        text-align: left;
    }

    .info p {
        display: block;
        width: 100%;
        margin: 0;
        padding: 10px 0;
        font-size: 19px;
        line-height: 1.4;
        text-align: justify;
    }

    .main-page-about-right {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
    }

    .social-buttons {
        left: 0;
        width: 100%;
        gap: 18px;
        align-items: center;
    }

    .about-image {
        height: 260px;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 250px);
        font-size: 17px;
        padding: 9px 12px;
    }

    .research-topics,
    .research-themes-dropdown {
        width: calc(100% - 40px);
    }

    .topics-list,
    .research-topics-dropdown {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 30px;
    }

    .topic-link,
    .research-topic-link {
        grid-template-columns: 32px minmax(0, 1fr) 25px;
        min-height: 58px;
    }

    .topic-name,
    .research-topic-name {
        font-size: 17px;
    }

    .qr-code {
        width: min(60vw, 320px);
        height: auto;
    }

    .qr-code-text {
        font-size: 20px;
        padding: 0 25px;
    }

    .about-rules-titles {
        font-size: 30px;
    }

    .about-rules-sec-p1,
    .about-rules-sec-p2 {
        margin: 20px;
        padding: 25px;
        font-size: 20px;
        line-height: 1.5;
    }

    .research-layout {
        width: calc(100% - 40px);
        margin: 20px auto;
        padding: 25px;
    }

    .article-layout {
        grid-template-columns: 1fr;
    }

    .author-card {
        position: static;
    }
}


/* ---------------------------------------------------------
   ТЕЛЕФОНЫ: до 600 px
   --------------------------------------------------------- */
@media (max-width: 600px) {

    html,
    body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    body {
        font-size: 16px;
    }

    /* ---------- HEADER ---------- */

    header {
        height: auto;
        min-height: 0;
        width: 100%;
        padding: 12px 10px 18px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 12px;
    }

    .logo {
        height: 65px;
        width: auto;
        max-width: 170px;
    }

    nav {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px 15px;
        font-size: 18px;
    }

    nav a {
        white-space: nowrap;
    }

    .login {
        width: min(100%, 250px);
        margin: 0;
        padding: 8px 12px;
        font-size: 16px;
    }

    /* ---------- ГЛАВНЫЙ БЛОК ---------- */

    .info {
        width: 100%;
        height: auto;
        min-height: 0;
        padding: 0 15px 30px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .info h1 {
        width: 100%;
        padding: 20px 0 5px;
        margin: 0;
        display: block;
        font-size: 30px;
        line-height: 1.15;
        text-align: center;
    }

    .info p {
        display: block;
        width: 100%;
        margin: 0;
        padding: 8px 0;
        font-size: 17px;
        line-height: 1.45;
        text-align: left;
    }

    .main-page-about-right {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 15px;
    }

    /* Главную картинку убираем только на телефоне. */

    .about-image {
        display: none;
    }

    .social-buttons {
        width: 100%;
        position: static;
        left: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 300px);
        min-height: 45px;
        padding: 9px 12px;
        font-size: 17px;
    }

    /* ---------- ТЕМЫ НА ГЛАВНОЙ ---------- */

    .research-topics {
        width: calc(100% - 30px);
        max-width: none;
        margin: 35px auto;
        padding: 0;
    }

    #themes-header {
        margin: 0 0 20px;
        padding: 0;
        font-size: 29px;
        line-height: 1.2;
        text-align: left;
    }

    .topics-list {
        display: grid;
        grid-template-columns: 1fr;
        width: 100%;
        gap: 0;
        margin: 0;
        padding: 0;
    }

    .topic-link {
        display: grid;
        grid-template-columns: 32px minmax(0, 1fr) 28px;
        width: 100%;
        min-width: 0;
        min-height: 58px;
        padding: 0 5px;
        box-sizing: border-box;
    }

    .topic-number {
        font-size: 12px;
    }

    .topic-name {
        min-width: 0;
        font-size: 17px;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }

    .topic-arrow {
        font-size: 21px;
        text-align: right;
    }

    .topic-link:hover {
        padding-left: 8px;
    }

    /* ---------- ВЫПАДАЮЩИЕ ТЕМЫ ---------- */

    .research-themes-dropdown {
        width: calc(100% - 30px);
        max-width: none;
        margin: 35px auto;
    }

    .research-all-themes-titles {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 14px 5px;
        font-size: 25px;
        line-height: 1.2;
    }

    .research-themes-arrow {
        font-size: 23px;
    }

    .research-topics-dropdown {
        display: grid;
        grid-template-columns: 1fr;
        width: 100%;
        gap: 0;
        margin-top: 10px;
    }

    .research-topic-link {
        display: grid;
        grid-template-columns: 32px minmax(0, 1fr) 28px;
        min-height: 58px;
        width: 100%;
        min-width: 0;
        box-sizing: border-box;
    }

    .research-topic-number {
        font-size: 12px;
    }

    .research-topic-name {
        min-width: 0;
        font-size: 16px;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }

    .research-topic-arrow {
        font-size: 21px;
    }

    /* ---------- QR ---------- */

    .qr-code {
        width: min(75vw, 280px);
        height: auto;
        margin: 25px auto;
    }

    .qr-code-text {
        padding: 0 15px;
        font-size: 17px;
        line-height: 1.4;
        margin-top: 20px;
    }

    /* ---------- ABOUT / RULES ---------- */

    .about-rules-titles {
        margin: 30px 15px 20px;
        font-size: 27px;
        line-height: 1.2;
        text-align: center;
    }

    .about-rules-sec-p1,
    .about-rules-sec-p2 {
        margin: 15px;
        padding: 20px;
        font-size: 17px;
        line-height: 1.5;
    }

    .about-rules-sec-p1 ol,
    .about-rules-sec-p2 ol {
        padding-left: 22px;
    }

    /* ---------- СПИСОК ИССЛЕДОВАНИЙ ---------- */

    .research-layout {
        width: calc(100% - 20px);
        margin: 15px auto 25px;
        padding: 18px 15px;
        box-sizing: border-box;
    }

    /* ---------- ПОЛНАЯ СТРАНИЦА ИССЛЕДОВАНИЯ ---------- */

    .article-page {
        width: calc(100% - 30px);
        max-width: none;
        margin: 25px auto 50px;
    }

    .back-button {
        margin-bottom: 25px;
        font-size: 18px;
        padding: 8px 15px;
    }

    .article-layout {
        display: grid;
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .article-content {
        display: contents;
    }

    .article-title {
        order: 1;
        font-size: 34px;
        line-height: 1.15;
        margin-bottom: 25px;
        overflow-wrap: anywhere;
    }

    .article-card {
        padding: 20px 15px;
        margin-bottom: 20px;
        border-radius: 15px;
    }

    .article-annotation {
        order: 2;
    }

    .article-information {
        order: 3;
    }

    /* Карточка автора находится перед основным текстом. */

    .author-card {
        order: 4;
        position: static;
        width: 100%;
        padding: 15px;
        border-radius: 15px;
    }

    .article-text {
        order: 5;
        margin-top: 30px;
        width: 100%;
        max-width: 100%;
        font-size: 18px;
        line-height: 1.6;
    }

    .article-annotation h2 {
        font-size: 27px;
        margin-bottom: 15px;
    }

    .article-annotation p {
        font-size: 18px;
        line-height: 1.5;
    }

    .article-information {
        flex-direction: column;
        gap: 20px;
    }

    .information-column {
        width: 100%;
    }

    .information-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
        margin-bottom: 15px;
    }

    .information-row span {
        width: 100%;
        font-size: 18px;
    }

    .information-row p {
        font-size: 18px;
        overflow-wrap: anywhere;
    }

    .author-card h2 {
        font-size: 32px;
    }

    .author-photo {
        width: 120px;
        height: 120px;
    }

    .author-card h3 {
        font-size: 25px;
        overflow-wrap: anywhere;
    }

    .author-block h4 {
        font-size: 21px;
    }

    .author-block p,
    .author-block li {
        font-size: 17px;
        line-height: 1.5;
        overflow-wrap: anywhere;
    }

    .author-email {
        font-size: 15px;
        overflow-wrap: anywhere;
    }

    /* ---------- ТЕКСТ ИССЛЕДОВАНИЯ ---------- */

    .article-text h2 {
        font-size: 27px;
        line-height: 1.25;
        margin-top: 45px;
        margin-bottom: 20px;
    }

    .article-text h3 {
        font-size: 23px;
        line-height: 1.3;
        margin-top: 35px;
        margin-bottom: 15px;
    }

    .article-text h4 {
        font-size: 20px;
        line-height: 1.3;
        margin-top: 30px;
        margin-bottom: 12px;
    }

    .article-text p {
        margin-left: 0;
        margin-bottom: 18px;
        text-align: left;
    }

    .article-text ul,
    .article-text ol {
        margin: 20px 0 25px 25px;
        padding-left: 10px;
    }

    .article-text li {
        margin-bottom: 10px;
        line-height: 1.6;
    }

    .article-text blockquote {
        margin: 30px 0;
        padding: 20px;
        border-left-width: 4px;
        border-radius: 12px;
        font-size: 18px;
        line-height: 1.6;
    }

    .article-text img {
        width: 100%;
        max-width: 100%;
        height: auto;
        margin: 30px auto;
        border-radius: 12px;
    }

    .article-text figure {
        margin: 30px auto;
        max-width: 100%;
    }

    .article-text figcaption {
        font-size: 15px;
        line-height: 1.4;
    }

    .article-text table {
        display: block;
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        margin: 30px 0;
        white-space: nowrap;
    }

    .article-text th {
        padding: 10px;
        font-size: 17px;
    }

    .article-text td {
        padding: 10px;
        font-size: 16px;
    }

    .article-text code {
        font-size: 16px;
        overflow-wrap: anywhere;
    }

    .article-text pre {
        max-width: 100%;
        overflow-x: auto;
        padding: 15px;
        margin: 25px 0;
        border-radius: 10px;
    }

    .article-text hr {
        margin: 40px 0;
    }

    .article-text sup {
        font-size: 12px;
    }
}


/* ---------------------------------------------------------
   ОЧЕНЬ МАЛЕНЬКИЕ ТЕЛЕФОНЫ: до 380 px
   --------------------------------------------------------- */
@media (max-width: 380px) {

    .logo {
        height: 58px;
    }

    nav {
        font-size: 16px;
        gap: 7px 12px;
    }

    .login {
        width: min(100%, 230px);
        font-size: 15px;
    }

    .info {
        padding-left: 12px;
        padding-right: 12px;
    }

    .info h1 {
        font-size: 27px;
    }

    .info p {
        font-size: 16px;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 270px);
        font-size: 16px;
    }

    #themes-header {
        font-size: 26px;
    }

    .topic-name {
        font-size: 16px;
    }

    .topic-link {
        min-height: 55px;
    }

    .research-all-themes-titles {
        font-size: 23px;
    }

    .research-topic-name {
        font-size: 15px;
    }
}

/* =========================================================
   КОНЕЦ ФИНАЛЬНОЙ АДАПТАЦИИ
   ========================================================= */


/* =========================================================
   ФИНАЛЬНЫЕ ПРАВКИ
   ========================================================= */

/* Темы публикаций: при наведении меняется только цвет текста.
   Фон остаётся белым. */
.topic-link:hover,
.research-topic-link:hover {
    background-color: #fff;
    color: #4a267b;
}

.topic-link:hover .topic-name,
.research-topic-link:hover .research-topic-name {
    color: #4a267b;
    text-decoration: underline;
    text-decoration-color: #4a267b;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

/* На мобильных карточка статьи становится компактнее.
   Эти правила применяются к карточке списка, а не к полному тексту исследования. */
@media (max-width: 600px) {

    .research-layout {
        width: calc(100% - 24px);
        margin: 12px auto 20px;
        padding: 16px 13px;
        border-radius: 12px;
    }

    .research-head {
        gap: 14px;
    }

    .research-left {
        gap: 10px;
    }

    .name-short-inf {
        font-size: 25px;
        line-height: 1.18;
    }

    .info-line {
        gap: 8px 15px;
        font-size: 14px;
    }

    .info-grid {
        grid-template-columns: 1fr;
        row-gap: 9px;
        column-gap: 0;
        margin-top: 12px;
        padding-bottom: 14px;
    }

    .author-short,
    .category-short,
    .date-short,
    .theme-short,
    .language-short,
    .author-short-inf,
    .category-short-inf,
    .date-short-inf,
    .theme-short-inf,
    .language-short-inf {
        font-size: 14px;
        line-height: 1.25;
    }

    .button-read {
        width: 85px;
        height: 38px;
        padding: 6px 10px;
        font-size: 15px;
    }
}

/* Очень маленькие телефоны */
@media (max-width: 380px) {
    .research-layout {
        width: calc(100% - 18px);
        padding: 13px 11px;
    }

    .name-short-inf {
        font-size: 22px;
    }

    .author-short,
    .category-short,
    .date-short,
    .theme-short,
    .language-short,
    .author-short-inf,
    .category-short-inf,
    .date-short-inf,
    .theme-short-inf,
    .language-short-inf {
        font-size: 13px;
    }

    .button-read {
        width: 78px;
        height: 35px;
        font-size: 14px;
    }
}


/* =========================================
   FIX: CENTER TEXT IN ARTICLE READ BUTTON
   ========================================= */

.button-read,
.read-button,
.article-read-button,
.research-read-button {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
    line-height: 1.1;
    margin: 0;
}

@media (max-width: 600px) {
    .button-read,
    .read-button,
    .article-read-button,
    .research-read-button {
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
    }
}


/* =========================================================
   FINAL FIXES — TABLET 601–750 px + TOPIC HOVER
   ========================================================= */

/* Темы публикаций: при наведении только сиреневый текст
   и подчёркивание. Белый фон сохраняется. */
.topic-link:hover,
.research-topic-link:hover {
    background-color: #fff;
    padding-left: 0;
}

.topic-link:hover .topic-name,
.research-topic-link:hover .research-topic-name {
    color: #4a267b;
    text-decoration: underline;
    text-decoration-color: #4a267b;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.topic-link:hover .topic-arrow,
.research-topic-link:hover .research-topic-arrow {
    color: #4a267b;
    transform: translateX(5px);
}

/* ---------------------------------------------------------
   Планшет / узкий планшет: 601–750 px
   На такой ширине главная страница уже ведёт себя как
   компактная мобильная версия, чтобы ничего не сжималось.
   --------------------------------------------------------- */

@media (max-width: 750px) and (min-width: 601px) {

    html,
    body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    header {
        height: auto;
        min-height: 0;
        padding: 12px 15px 18px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 12px;
    }

    .logo {
        height: 70px;
        width: auto;
        max-width: 180px;
    }

    nav {
        width: 100%;
        flex: none;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px 18px;
        font-size: 22px;
    }

    nav a {
        white-space: nowrap;
    }

    .login {
        width: min(100%, 240px);
        margin: 0;
        font-size: 17px;
        padding: 8px 14px;
    }

    /* ---------- ГЛАВНЫЙ БЛОК ---------- */

    .info {
        width: 100%;
        height: auto;
        min-height: 0;
        padding: 10px 25px 35px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .info h1 {
        width: 100%;
        margin: 0;
        padding: 15px 0 5px;
        display: block;
        font-size: 36px;
        line-height: 1.15;
        text-align: center;
    }

    .info p {
        width: 100%;
        max-width: 650px;
        margin: 0;
        padding: 5px 0;
        display: block;
        font-size: 19px;
        line-height: 1.45;
        text-align: left;
    }

    .main-page-about-right {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 15px;
        position: static;
    }

    /* На узком планшете картинка тоже убирается:
       она больше не сжимает текст и кнопки. */
    .about-image {
        display: none;
    }

    .social-buttons {
        width: 100%;
        position: static;
        left: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 14px;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 300px);
        min-height: 46px;
        padding: 9px 14px;
        font-size: 18px;
    }

    /* ---------- ТЕМЫ ПУБЛИКАЦИЙ ---------- */

    .research-topics {
        width: calc(100% - 50px);
        max-width: none;
        margin: 45px auto;
    }

    #themes-header {
        margin: 0 0 25px;
        font-size: 32px;
        line-height: 1.2;
        text-align: left;
    }

    .topics-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 25px;
        width: 100%;
    }

    .topic-link {
        grid-template-columns: 32px minmax(0, 1fr) 28px;
        min-height: 60px;
        width: 100%;
        padding: 0 3px;
    }

    .topic-number {
        font-size: 12px;
    }

    .topic-name {
        font-size: 17px;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }

    .topic-arrow {
        font-size: 21px;
    }

    /* ---------- ВЫПАДАЮЩИЕ ТЕМЫ ---------- */

    .research-themes-dropdown {
        width: calc(100% - 50px);
        max-width: none;
        margin: 40px auto;
    }

    .research-all-themes-titles {
        font-size: 28px;
        padding: 15px 5px;
    }

    .research-topics-dropdown {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 25px;
        margin-top: 15px;
    }

    .research-topic-link {
        grid-template-columns: 32px minmax(0, 1fr) 28px;
        min-height: 60px;
        width: 100%;
        padding: 0 3px;
    }

    .research-topic-name {
        font-size: 16px;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }

    /* ---------- КАРТОЧКА ИССЛЕДОВАНИЯ ---------- */

    .research-layout {
        width: calc(100% - 40px);
        margin: 20px auto 30px;
        padding: 22px 20px;
    }

    .research-head {
        flex-direction: column;
        gap: 18px;
    }

    .research-left {
        width: 100%;
        gap: 14px;
    }

    .name-short-inf {
        font-size: 30px;
        line-height: 1.2;
        overflow-wrap: anywhere;
    }

    .info-grid {
        grid-template-columns: 1fr 1fr;
        row-gap: 15px;
        column-gap: 25px;
        margin-top: 15px;
        padding-bottom: 20px;
    }

    .author-short,
    .category-short,
    .date-short,
    .theme-short,
    .language-short,
    .author-short-inf,
    .category-short-inf,
    .date-short-inf,
    .theme-short-inf,
    .language-short-inf {
        font-size: 17px;
        overflow-wrap: anywhere;
    }

    .button-read {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 120px;
        min-width: 120px;
        height: 44px;
        padding: 0 12px;
        font-size: 17px;
        line-height: 1;
        text-align: center;
        box-sizing: border-box;
    }
}

/* ---------------------------------------------------------
   Очень узкий планшет: 601–650 px
   Одна колонка для карточек тем — чтобы длинные названия
   никогда не ломали сетку.
   --------------------------------------------------------- */

@media (max-width: 650px) and (min-width: 601px) {

    .topics-list,
    .research-topics-dropdown {
        grid-template-columns: 1fr;
    }

    .topic-link,
    .research-topic-link {
        min-height: 58px;
    }
}


/* =========================================================
   FINAL MOBILE FIX — VERY NARROW PHONES (320–360 px)
   =========================================================
   The previous mobile rules already hid overflow on html/body,
   but some child elements could still be wider than the viewport.
   This block fixes the actual sources instead of only hiding them.
   ========================================================= */

@media (max-width: 360px) {

    /* ---------- VIEWPORT ---------- */

    html,
    body {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        overflow-x: clip;
    }

    body {
        margin: 0;
    }

    /* ---------- GENERAL ELEMENTS ---------- */

    header,
    main,
    section,
    article,
    footer,
    details,
    .info,
    .research-topics,
    .research-themes-dropdown,
    .research-layout,
    .article-page,
    .article-layout,
    .article-content,
    .article-card,
    .author-card {
        max-width: 100%;
        min-width: 0;
        box-sizing: border-box;
    }

    img,
    video,
    iframe,
    svg,
    canvas {
        max-width: 100%;
        box-sizing: border-box;
    }

    a,
    button,
    input,
    textarea,
    select {
        max-width: 100%;
        box-sizing: border-box;
    }

    /* ---------- HEADER ---------- */

    header {
        width: 100%;
        padding-left: 8px;
        padding-right: 8px;
        overflow: hidden;
    }

    nav {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        gap: 7px 10px;
        overflow: hidden;
    }

    nav a {
        max-width: 100%;
        white-space: normal;
        text-align: center;
        overflow-wrap: anywhere;
    }

    .logo {
        max-width: 150px;
        height: auto;
    }

    .login {
        width: min(100%, 220px);
        max-width: calc(100% - 20px);
        margin-left: auto;
        margin-right: auto;
    }

    /* ---------- MAIN PAGE ---------- */

    .info {
        width: 100%;
        padding-left: 10px;
        padding-right: 10px;
        overflow: hidden;
    }

    .info h1,
    .info p,
    .main-page-about-right,
    .social-buttons {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .info h1 {
        font-size: 26px;
        overflow-wrap: anywhere;
    }

    .info p {
        font-size: 15px;
        overflow-wrap: anywhere;
    }

    .social-buttons {
        position: static;
        left: auto;
    }

    .main-page-button,
    .switch-to-english {
        width: min(100%, 260px);
        max-width: calc(100% - 20px);
    }

    /* ---------- PUBLICATION TOPICS ---------- */

    .research-topics {
        width: calc(100% - 20px);
        margin-left: auto;
        margin-right: auto;
    }

    #themes-header {
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
        font-size: 25px;
        overflow-wrap: anywhere;
    }

    .topics-list,
    .research-topics-dropdown {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .topic-link,
    .research-topic-link {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        grid-template-columns: 28px minmax(0, 1fr) 24px;
        padding-left: 2px;
        padding-right: 2px;
    }

    .topic-name,
    .research-topic-name {
        min-width: 0;
        max-width: 100%;
        overflow-wrap: anywhere;
        word-break: normal;
        font-size: 15px;
    }

    .topic-arrow,
    .research-topic-arrow {
        min-width: 0;
    }

    /* ---------- DROPDOWN TOPICS ---------- */

    .research-themes-dropdown {
        width: calc(100% - 20px);
        margin-left: auto;
        margin-right: auto;
    }

    .research-all-themes-titles {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        padding-left: 2px;
        padding-right: 2px;
        font-size: 21px;
        overflow-wrap: anywhere;
    }

    /* ---------- RESEARCH CARD ---------- */

    .research-layout {
        width: calc(100% - 16px);
        margin-left: auto;
        margin-right: auto;
        padding: 12px 10px;
        overflow: hidden;
    }

    .research-head,
    .research-left,
    .info-grid,
    .keywords-section {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .name-short-inf {
        max-width: 100%;
        min-width: 0;
        font-size: 21px;
        overflow-wrap: anywhere;
        word-break: normal;
    }

    .info-line {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        gap: 6px 10px;
    }

    .author-short,
    .category-short,
    .date-short,
    .theme-short,
    .language-short,
    .author-short-inf,
    .category-short-inf,
    .date-short-inf,
    .theme-short-inf,
    .language-short-inf,
    .keywords-short,
    .keywords-short-inf,
    .annotation-short,
    .annotation-short-inf {
        min-width: 0;
        max-width: 100%;
        overflow-wrap: anywhere;
        word-break: normal;
    }

    .button-read {
        width: 78px;
        min-width: 0;
        max-width: 100%;
        height: 35px;
        padding: 0 8px;
        white-space: normal;
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        line-height: 1.05;
        flex-shrink: 1;
    }

    /* ---------- FULL ARTICLE ---------- */

    .article-page {
        width: calc(100% - 20px);
        margin-left: auto;
        margin-right: auto;
    }

    .article-layout {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        grid-template-columns: minmax(0, 1fr);
    }

    .article-content,
    .article-card,
    .article-text,
    .author-card,
    .article-information,
    .information-column,
    .information-row {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .article-title {
        max-width: 100%;
        font-size: 28px;
        overflow-wrap: anywhere;
    }

    .article-card,
    .author-card {
        padding-left: 12px;
        padding-right: 12px;
        overflow: hidden;
    }

    .article-text {
        font-size: 17px;
        overflow-wrap: anywhere;
    }

    .article-text p,
    .article-text h2,
    .article-text h3,
    .article-text h4,
    .article-text li,
    .article-text blockquote {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .article-text ul,
    .article-text ol {
        max-width: calc(100% - 20px);
        margin-left: 20px;
        padding-left: 8px;
    }

    .article-text blockquote {
        padding: 15px;
        margin-left: 0;
        margin-right: 0;
    }

    .article-text img,
    .article-text figure {
        width: 100%;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .article-text table {
        display: block;
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
    }

    .article-text pre {
        max-width: 100%;
        overflow-x: auto;
        box-sizing: border-box;
    }

    /* ---------- EXTRA SAFETY FOR LONG TEXT ---------- */

    .author-email,
    .author-card h3,
    .author-block p,
    .author-block li,
    .information-row p {
        max-width: 100%;
        min-width: 0;
        overflow-wrap: anywhere;
        word-break: break-word;
    }
}