/* ===== Fonts ===== */
@font-face {
    font-family: 'CocomatPro';
    src: url('../fonts/CocomatPro-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Constantia';
    src: url('../fonts/Constantia.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --color-bg:        #9ED0EB;
    --color-bg-dark:   #70BEE5;
    --color-btn:       #6D8AC4;
    --color-btn-hover: #5874ad;
    --color-text:      #264A7E;
    --color-white:     #FFFFFF;
    --font-heading: 'CocomatPro', Arial, sans-serif;
    --font-body:    'Constantia', Georgia, serif;
    --container: 1200px;
    --gutter: 20px;
    --radius: 10px;
    --transition: 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
}

body.is-locked { overflow: hidden; }

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 28px;
    background-color: var(--color-btn);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 15px;
    border: none;
    border-radius: var(--radius);
    transition: background-color var(--transition), transform var(--transition);
    white-space: nowrap;
}

.btn:hover { background-color: var(--color-btn-hover); }
.btn:active { transform: translateY(1px); }

.header {
    background-color: var(--color-bg);
}

.header__top { padding: 24px 0 18px; }

.header__top .container {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.header__logo {
    display: block;
    width: 100%;
    max-width: 980px;
}

.header__logo img { width: 100%; height: auto; }

.burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    padding: 0;
    position: absolute;
    left: var(--gutter);
    top: 50%;
    transform: translateY(-50%);
    z-index: 260;
}

.burger span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition), width var(--transition);
}

.burger span:nth-child(3) { width: 65%; }

.burger.is-active span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
.burger.is-active span:nth-child(2) { opacity: 0; }
.burger.is-active span:nth-child(3) { width: 100%; transform: translateY(-8.5px) rotate(-45deg); }

.header__nav { background-color: var(--color-bg-dark); }

.nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 36px;
    padding: 14px 0;
}

.nav__link {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: opacity var(--transition);
}

.nav__link:hover { opacity: 0.75; }
.nav__link--active { opacity: 0.7; }

/* ===== Editorial Board ===== */
.editorial { padding: 0 0 50px; background-color: var(--color-bg); }

.editorial__card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 40px;
}

.editorial__group { margin-bottom: 36px; }
.editorial__group:last-child { margin-bottom: 0; }

.editorial__heading {
    color: var(--color-text);
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 22px;
}

.editorial__person { margin-bottom: 22px; }
.editorial__person:last-child { margin-bottom: 0; }

.editorial__name {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 17px;
    margin-bottom: 8px;
}

.editorial__desc {
    margin: 0 0 6px;
    font-size: 15px;
    line-height: 1.7;
    text-align: justify;
}

.editorial__email {
    display: inline-block;
    color: var(--color-btn);
    font-size: 14px;
    text-decoration: underline;
    transition: color var(--transition);
}

.editorial__email:hover { color: var(--color-btn-hover); }

/* ===== Authors instructions (tabs) ===== */
.authors { padding: 0 0 50px; background-color: var(--color-bg); }

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 0;
}

.tabs__btn {
    background-color: var(--color-bg-dark);
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 14px;
    border: none;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 12px 26px;
    min-height: 44px;
    transition: background-color var(--transition), color var(--transition);
}

.tabs__btn:hover { background-color: #82c6e8; }

.tabs__btn.is-active {
    background-color: var(--color-btn);
    color: var(--color-white);
}

.authors__card {
    background-color: var(--color-white);
    border-radius: 0 var(--radius) var(--radius) var(--radius);
    padding: 36px 40px;
}

.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.authors__intro {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 17px;
    text-align: center;
    line-height: 1.5;
    margin: 0 0 22px;
}

.authors__text {
    margin: 0 0 14px;
    font-size: 15px;
    line-height: 1.7;
    text-align: justify;
}

.authors__heading {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin: 22px 0 12px;
}

.authors__list {
    margin: 0 0 14px;
    padding-left: 22px;
    list-style: disc;
    font-size: 15px;
    line-height: 1.7;
}

.authors__list--ordered { list-style: decimal; }

.authors__list li { margin-bottom: 6px; }

.authors__list .authors__list {
    margin-top: 6px;
    margin-bottom: 8px;
    list-style: circle;
}

.authors__list .authors__list .authors__list { list-style: square; }

.authors__list a {
    color: var(--color-btn);
    text-decoration: underline;
    word-break: break-word;
}

.authors__list a:hover { color: var(--color-btn-hover); }

.authors__text--signature {
    text-align: right;
    margin-top: 24px;
    font-style: italic;
}

.authors__text--date {
    text-align: right;
    font-size: 13px;
    color: rgba(38, 74, 126, 0.7);
    margin-bottom: 18px;
}

.authors__download {
    display: block;
    text-align: right;
    margin-top: 22px;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 15px;
    transition: color var(--transition);
}

.authors__download:hover { color: var(--color-btn); }

/* ===== About foundation ===== */
.fond { padding: 30px 0 20px; background-color: var(--color-bg); }

.fond__card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    padding: 32px 36px;
}

.fond__card::after {
    content: "";
    display: block;
    clear: both;
}

.fond__media {
    float: left;
    width: 46%;
    margin: 4px 26px 14px 0;
    border-radius: var(--radius);
    overflow: hidden;
    background-color: var(--color-bg-dark);
    shape-outside: inset(0 round var(--radius));
}

.fond__img {
    display: block;
    width: 100%;
    height: 360px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.fond__media:hover .fond__img { transform: scale(1.03); }

.fond__lead {
    margin: 0 0 14px;
    font-family: var(--font-heading);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
}

.fond__text {
    margin: 0 0 12px;
    font-size: 15px;
    line-height: 1.7;
    text-align: justify;
}

.fond__text:last-child { margin-bottom: 0; }

.fond__more {
    display: block;
    text-align: right;
    margin-top: 14px;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 15px;
    transition: color var(--transition);
}

.fond__more:hover { color: var(--color-btn); }

/* ===== Issues page ===== */
.issues { padding: 0 0 50px; background-color: var(--color-bg); }

.issues__panels {
    background-color: var(--color-white);
    border-radius: 0 var(--radius) var(--radius) var(--radius);
    padding: 30px;
}

.issues__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.issue {
    position: relative;
    background-color: var(--color-bg);
    border-radius: var(--radius);
    padding: 26px 28px 22px;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}

.issue:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(38, 74, 126, 0.18);
}

.issue::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    background-color: var(--color-btn);
}

.issue__year {
    position: absolute;
    top: 18px;
    right: 22px;
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--color-white);
    background-color: var(--color-btn);
    padding: 4px 10px;
    border-radius: 999px;
    letter-spacing: 0.5px;
}

.issue__num {
    font-family: var(--font-heading);
    font-size: 44px;
    line-height: 1;
    color: var(--color-bg-dark);
    margin-bottom: 8px;
}

.issue__title {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--color-text);
    margin-bottom: 4px;
}

.issue__period {
    margin: 0 0 18px;
    font-style: italic;
    font-size: 15px;
    color: var(--color-text);
    opacity: 0.85;
}

.issue__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.issue__link {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 16px;
    border-radius: var(--radius);
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--color-text);
    background-color: var(--color-white);
    transition: background-color var(--transition), color var(--transition);
}

.issue__link:hover { background-color: var(--color-bg-dark); color: var(--color-white); }

.issue__link--primary {
    background-color: var(--color-btn);
    color: var(--color-white);
}

.issue__link--primary:hover {
    background-color: var(--color-btn-hover);
    color: var(--color-white);
}

.issue--upcoming { opacity: 0.85; }
.issue--upcoming::before { background-color: var(--color-bg-dark); }
.issue--upcoming .issue__year { background-color: var(--color-bg-dark); }

.issue__status {
    margin: 0;
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.7;
}

/* ===== Single issue page ===== */
.issue-page { padding: 0 0 50px; background-color: var(--color-bg); }

.issue-page__back {
    display: inline-block;
    margin-bottom: 14px;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 14px;
    opacity: 0.85;
    transition: opacity var(--transition);
}

.issue-page__back:hover { opacity: 1; color: var(--color-btn); }

.issue-page__card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 40px;
}

.issue-page__title {
    text-align: center;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 24px;
    margin: 0 0 14px;
}

.issue-page__download {
    display: inline-block;
    color: var(--color-btn);
    font-family: var(--font-heading);
    font-size: 15px;
    margin-bottom: 28px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    transition: color var(--transition);
}

.issue-page__download:hover { color: var(--color-btn-hover); }

.issue-section { margin-bottom: 30px; }
.issue-section:last-child { margin-bottom: 0; }

.issue-section__heading {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    padding-bottom: 10px;
    margin: 0 0 20px;
    border-bottom: 2px solid var(--color-bg-dark);
}

.article-item {
    position: relative;
    padding: 0 0 22px 0;
    margin-bottom: 22px;
    border-bottom: 1px solid rgba(38, 74, 126, 0.12);
}

.article-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.article-item__title {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 17px;
    text-transform: uppercase;
    line-height: 1.4;
    letter-spacing: 0.3px;
    margin: 0 0 10px;
}

.article-item__author {
    margin: 0 0 8px;
    font-family: var(--font-heading);
    font-size: 15px;
    color: var(--color-text);
}

.article-item__abstract {
    margin: 0 0 10px;
    font-size: 15px;
    line-height: 1.7;
    text-align: justify;
}

.article-item__more {
    display: inline-block;
    color: var(--color-btn);
    font-family: var(--font-heading);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    transition: color var(--transition);
}

.article-item__more:hover { color: var(--color-btn-hover); }

/* ===== Single article page ===== */
.article { padding: 0 0 50px; background-color: var(--color-bg); }

.article__breadcrumbs {
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--color-text);
    margin-bottom: 16px;
    opacity: 0.9;
}

.article__breadcrumbs a {
    color: var(--color-text);
    transition: color var(--transition);
}

.article__breadcrumbs a:hover { color: var(--color-btn); }
.article__sep { margin: 0 8px; opacity: 0.5; }
.article__crumb-current { opacity: 0.7; }

.article__card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    padding: 40px 44px;
}

.article__meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 24px;
    padding: 16px 20px;
    margin-bottom: 24px;
    background-color: var(--color-bg);
    border-radius: var(--radius);
    border-left: 4px solid var(--color-btn);
}

.article__meta-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 14px;
}

.article__meta-label {
    font-family: var(--font-heading);
    color: var(--color-text);
    opacity: 0.8;
    min-width: 90px;
}

.article__meta-value { color: var(--color-text); word-break: break-word; }
.article__meta-value a { color: var(--color-btn); text-decoration: underline; }
.article__meta-value a:hover { color: var(--color-btn-hover); }

.article__title {
    text-align: center;
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 22px;
    line-height: 1.35;
    margin: 0 0 24px;
}

.article__authors {
    background-color: var(--color-bg);
    border-radius: var(--radius);
    padding: 18px 22px;
    margin-bottom: 26px;
}

.article__author + .article__author { margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(38,74,126,0.12); }

.article__author-name {
    font-family: var(--font-heading);
    font-size: 16px;
    color: var(--color-text);
    margin-bottom: 4px;
}

.article__author-affiliation {
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 8px;
    opacity: 0.9;
}

.article__author-meta {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 13px;
    line-height: 1.7;
}

.article__author-meta li span {
    font-family: var(--font-heading);
    color: var(--color-text);
    opacity: 0.7;
    margin-right: 4px;
}

.article__author-meta a { color: var(--color-btn); text-decoration: underline; word-break: break-all; }
.article__author-meta a:hover { color: var(--color-btn-hover); }

.article__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}

.article__btn-pdf { min-height: 44px; }

.article__btn-cite {
    color: var(--color-btn);
    font-family: var(--font-heading);
    font-size: 14px;
    text-decoration: underline;
    transition: color var(--transition);
}

.article__btn-cite:hover { color: var(--color-btn-hover); }

.article__section { margin-bottom: 26px; }

.article__section-title {
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 17px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin: 0 0 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-bg-dark);
}

.article__text {
    margin: 0 0 14px;
    font-size: 15px;
    line-height: 1.75;
    text-align: justify;
}

.article__text:last-child { margin-bottom: 0; }

.article__keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.article__keywords li {
    background-color: var(--color-bg);
    color: var(--color-text);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 13px;
    font-family: var(--font-heading);
}

.article__cite {
    background-color: var(--color-bg);
    border-left: 4px solid var(--color-btn);
    border-radius: var(--radius);
    padding: 14px 18px;
    font-size: 14px;
    line-height: 1.7;
}

.article__cite p { margin: 0; }

.article__license {
    margin-top: 30px;
    padding-top: 18px;
    border-top: 1px solid rgba(38,74,126,0.12);
    font-size: 12px;
    color: var(--color-text);
    opacity: 0.75;
    text-align: center;
}

.article__license p { margin: 2px 0; }

.nav-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(38, 74, 126, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 200;
}

.nav-overlay.is-active { opacity: 1; visibility: visible; }

.banner { background-color: var(--color-bg); }
.slider { position: relative; overflow: hidden; cursor: grab; user-select: none; }
.slider:active { cursor: grabbing; }

.slider__list {
    position: relative;
    display: block;
    width: 100%;
    height: 460px;
}

.slider__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

.slider__slide.is-active { opacity: 1; }
.slider__img { width: 100%; height: 100%; object-fit: cover; }

.slider__dots {
    position: absolute;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}

.slider__dot {
    width: 12px;
    height: 12px;
    padding: 0;
    border: 2px solid var(--color-white);
    border-radius: 50%;
    background-color: transparent;
    transition: background-color var(--transition), transform var(--transition);
}

.slider__dot.is-active,
.slider__dot:hover { background-color: var(--color-white); }
.slider__dot:hover { transform: scale(1.15); }

.search { padding: 30px 0; background-color: var(--color-bg); }

.search-form {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: flex-end;
}

.search-form__input {
    flex: 0 1 360px;
    min-width: 0;
    height: 44px;
    padding: 0 16px;
    background-color: var(--color-white);
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--color-text);
}

.search-form__input::placeholder { color: #9aa9c1; }

.search-results { margin-top: 20px; }

.search-results__status {
    color: var(--color-white);
    text-align: center;
    font-size: 14px;
    padding: 12px 0;
}

.search-results__list {
    list-style: none;
    margin: 0;
    padding: 0;
    background-color: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
}

.search-results__item {
    padding: 16px 20px;
    border-bottom: 1px solid #eef1f6;
}
.search-results__item:last-child { border-bottom: none; }

.search-results__link {
    display: block;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    margin-bottom: 6px;
}

.search-results__link:hover { color: #2a6e3f; text-decoration: underline; }

.search-results__excerpt {
    color: #5a6a82;
    font-size: 14px;
    line-height: 1.5;
}

.search-results__excerpt mark {
    background-color: #fff3a8;
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

.about { padding: 10px 0 50px; background-color: var(--color-bg); }

.about__card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 40px;
}

.about__title {
    color: var(--color-text);
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.about__text {
    margin: 0 0 12px;
    font-size: 15px;
    line-height: 1.7;
    text-align: justify;
}

.about__text:last-child { margin-bottom: 0; }

.subscribe {
    background-color: var(--color-bg);
    padding: 50px 0 60px;
    text-align: center;
}

.subscribe__title {
    color: var(--color-white);
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    line-height: 1.3;
}

.subscribe-form {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.subscribe-form__status {
    flex: 1 0 100%;
    min-height: 1.4em;
    text-align: center;
    font-size: 14px;
    color: var(--color-white);
    margin-top: 4px;
}

.subscribe-form__status.is-success { color: #6bd99c; }
.subscribe-form__status.is-error { color: #ff8a8a; }
.subscribe-form__status.is-loading { opacity: 0.8; }

.subscribe-form__input {
    flex: 0 1 360px;
    min-width: 0;
    height: 44px;
    padding: 0 16px;
    background-color: var(--color-white);
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--color-text);
}

.subscribe-form__input::placeholder { color: #9aa9c1; }

.footer {
    background-color: var(--color-bg-dark);
    padding: 36px 0;
    color: var(--color-white);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.footer__col { min-width: 0; }

.footer__col--brand {
    flex: 0 1 420px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.footer__col--info { flex: 0 1 460px; }
.footer__logo { display: block; margin-bottom: 6px; }
.footer__logo img { width: 100%; height: auto; }

.footer__site {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 14px;
    text-align: right;
    padding-right: 4px;
    margin-bottom: 16px;
}

.footer__socials { display: flex; justify-content: center; gap: 14px; }

.footer__social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    transition: opacity var(--transition), transform var(--transition);
}

.footer__social:hover { opacity: 0.85; transform: translateY(-2px); }
.footer__social img { width: 100%; height: 100%; }

.footer__info-line {
    margin: 0 0 6px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-white);
}

.footer__info-line:last-child { margin-bottom: 0; }

@media (max-width: 992px) {
    .slider__list { height: 360px; }
    .nav { gap: 22px; }
    .nav__link { font-size: 13px; }
    .header__logo { max-width: 720px; }
    .footer__inner { gap: 36px; }
}

@media (max-width: 768px) {
    .burger { display: flex; }
    .header__top { padding: 16px 0 14px; }
    .header__top .container { justify-content: center; }

    .header__logo {
        max-width: none;
        width: calc(100% - 60px);
        margin-left: 36px;
    }

    .header__nav {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        max-width: 80%;
        background-color: var(--color-bg-dark);
        transform: translateX(-100%);
        transition: transform 0.35s ease;
        z-index: 250;
        overflow-y: auto;
        padding: 70px 0 30px;
    }

    .header__nav.is-open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.25);
    }

    .header__nav .container { padding: 0; }

    .nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0;
    }

    .nav__item { border-bottom: 1px solid rgba(255, 255, 255, 0.25); }
    .nav__item:first-child { border-top: 1px solid rgba(255, 255, 255, 0.25); }

    .nav__link {
        display: block;
        padding: 16px 24px;
        text-align: left;
        font-size: 13px;
    }

    .nav__link:hover { background-color: rgba(255, 255, 255, 0.08); opacity: 1; }

    .slider__list { height: 220px; }

    .search-form { justify-content: stretch; }
    .search-form__input { flex: 1 1 auto; }

    .about__card,
    .editorial__card,
    .authors__card,
    .fond__card,
    .issue-page__card,
    .article__card { padding: 24px 22px; }
    .issue-page__title { font-size: 19px; }
    .issue-section__heading { font-size: 16px; }
    .article-item__title { font-size: 15px; }

    .article__title { font-size: 18px; }
    .article__meta { grid-template-columns: 1fr; padding: 14px 16px; }
    .article__meta-label { min-width: 80px; }
    .article__section-title { font-size: 15px; }
    .article__authors { padding: 14px 16px; }

    .fond__media {
        float: none;
        width: 100%;
        margin: 0 0 18px 0;
        shape-outside: none;
    }
    .fond__img { height: 240px; }

    .issues__grid { grid-template-columns: 1fr; gap: 16px; }
    .issues__panels { padding: 22px 18px; }
    .issue { padding: 22px 22px 18px; }
    .issue__num { font-size: 36px; }
    .issue__title { font-size: 17px; }
    .about__title,
    .editorial__heading,
    .subscribe__title { font-size: 18px; }
    .authors__intro { font-size: 15px; }
    .authors__heading { font-size: 15px; }

    .tabs {
        flex-wrap: nowrap;
        gap: 6px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        margin: 0 calc(-1 * var(--gutter));
        padding: 0 var(--gutter);
    }

    .tabs::-webkit-scrollbar { display: none; }

    .tabs__btn {
        font-size: 13px;
        padding: 10px 16px;
        flex: 0 0 auto;
        white-space: nowrap;
    }
    .subscribe-form__input { flex: 1 1 auto; }

    .footer { padding: 28px 0; }

    .footer__inner {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
    }

    .footer__col--brand,
    .footer__col--info {
        flex: 0 0 auto;
        width: 100%;
        max-width: 100%;
    }

    .footer__site { text-align: right; }
    .footer__socials { justify-content: center; margin-top: 4px; }
}

@media (max-width: 480px) {
    .header__logo { margin-left: 30px; }
    .slider__list { height: 170px; }
    .fond__img { height: 200px; }
    .slider__dots { bottom: 10px; }
    .about { padding: 10px 0 30px; }
    .subscribe { padding: 30px 0 40px; }
    .btn { padding: 10px 18px; font-size: 14px; }
    .search-form__input, .subscribe-form__input { height: 42px; }
}