/* ============================================================
   os-korea (ScholarOS Korea Theme) — base + header
   Visual source: Hanjiang Academic Press static template
   (navy + gold palette, Playfair Display + Inter)
   ============================================================ */

:root {
    --navy: #0F2540;
    --navy-2: #1E3A5F;
    --gold: #C9A961;
    --gold-2: #E8C97A;
    --gold-ink: #9A7B33;      /* gold darkened for text on white */
    --ink: #1A202C;
    --gray: #4A5568;
    --light: #F5F7FA;
    --line: #E2E8F0;
    --strip: #CBD5E0;
    --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --sans: 'Inter', -apple-system, 'Segoe UI', Arial, sans-serif;
    --maxw: 1280px;
}

/* ---------- Base (overrides Bootstrap 3 defaults) ---------- */
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body.hk-body {
    margin: 0;
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    color: var(--ink);
    background: #fff;
}
.hk-body h1, .hk-body h2, .hk-body h3, .hk-body h4, .hk-body h5, .hk-body h6 {
    font-family: var(--serif);
    color: var(--navy);
    font-weight: 700;
    line-height: 1.65;
    margin-top: 0;
}
.hk-body a { color: var(--navy); text-decoration: none; transition: color .2s ease, background-color .2s ease, border-color .2s ease; }
.hk-body a:hover,
.hk-body a:focus { color: var(--gold); text-decoration: none; }
.hk-body img { max-width: 100%; }
.hk-body p { margin: 0 0 1em; }
.hk-body ul, .hk-body ol { margin-top: 0; }
.hk-body .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }

.hk-container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
    box-sizing: border-box;
}
.hk-wrap { padding-top: 70px; padding-bottom: 70px; }

/* ---------- Skip links ---------- */
.skip-links a {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 2000;
    background: var(--navy);
    color: #fff;
    padding: 10px 16px;
}
.skip-links a:focus { left: 10px; top: 10px; color: #fff; }

/* ---------- Top strip (hanjiang .top-strip) ---------- */
.hk-topstrip { background: var(--navy); color: var(--strip); font-size: 13px; }
.hk-topstrip .utility-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    min-height: 38px;
    padding-top: 6px;
    padding-bottom: 6px;
}
.hk-topstrip .utility-links { display: flex; align-items: center; gap: 16px; min-width: 0; }
.hk-topstrip a { color: var(--strip); }
.hk-body .hk-topstrip a:hover,
.hk-body .hk-topstrip a:focus { color: var(--gold-2); }
.hk-topstrip .utility-nav { display: flex; gap: 18px; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
.hk-topstrip .utility-nav::-webkit-scrollbar { display: none; }
.hk-topstrip .utility-nav-link { white-space: nowrap; }
.hk-strip-mail i { color: var(--gold); margin-right: 4px; }

/* Login / user state (markup injected by header.js) */
.header-login { position: relative; display: flex; align-items: center; }
.hk-body .login-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}
.hk-body .login-button:hover { color: var(--gold-2); }
.login-icon {
    display: inline-block;
    width: 14px;
    text-align: center;
}
.login-icon::before { content: "\f007"; font-family: FontAwesome; color: var(--gold); }
.user-info-wrapper { position: relative; }
.user-info-button { display: flex; align-items: center; gap: 8px; color: #fff; cursor: pointer; }
.user-avatar,
.user-avatar-placeholder {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
    flex: 0 0 24px;
}
.user-avatar-placeholder {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--gold);
    color: var(--navy);
    font-weight: 700;
    font-size: 12px;
}
.user-name { max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.dropdown-arrow { font-size: 9px; color: var(--gold); }
.user-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 150px;
    background: #fff;
    border-top: 3px solid var(--gold);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 12px 30px rgba(15, 37, 64, .15);
    z-index: 1200;
    padding: 6px 0;
}
.user-dropdown::before { content: ""; position: absolute; top: -11px; left: 0; right: 0; height: 10px; }
.user-dropdown.show { display: block; }
.hk-body .user-dropdown .logout-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    color: var(--ink);
    font-size: 14px;
}
.hk-body .user-dropdown .logout-button:hover { background: var(--light); color: var(--gold-ink); }
.logout-button .logout-icon { flex: 0 0 16px; }

/* ---------- Header (hanjiang header / nav) ---------- */
.site-header {
    background: #fff;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow .2s ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 20px rgba(15, 37, 64, .08); }
.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding-top: 18px;
    padding-bottom: 18px;
    position: relative;
}
.header-logo { flex: 0 0 auto; min-width: 0; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    background: var(--navy);
    color: var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--serif);
    font-weight: 700;
    font-size: 20px;
    border-radius: 3px;
}
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--navy); line-height: 1.1; }
.brand-sub { font-size: 11px; color: var(--gray); letter-spacing: 1px; margin-top: 3px; }
.logo-image { display: block; max-height: 48px; width: auto; max-width: 260px; }

.header-nav { flex: 1 1 auto; min-width: 0; display: flex; justify-content: flex-end; }
.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 28px;
    flex-wrap: nowrap;
}
.nav-menu > li { position: relative; }
.hk-body .nav-menu > li > a,
.nav-menu > li > .nav-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
}
.hk-body .nav-menu > li > a:hover,
.hk-body .nav-menu > li:hover > a,
.nav-menu > li:hover > .nav-label { color: var(--gold); }
.nav-caret {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    margin-left: 2px;
}

/* Desktop dropdowns (journal columns + priority "More" menu) */
.nav-submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: -18px;
    min-width: 230px;
    margin: 0;
    padding: 8px 0;
    list-style: none;
    background: #fff;
    border-top: 3px solid var(--gold);
    border-radius: 0 0 6px 6px;
    box-shadow: 0 12px 30px rgba(15, 37, 64, .12);
    z-index: 1100;
}
.nav-menu > li:hover > .nav-submenu,
.nav-menu > li:focus-within > .nav-submenu { display: block; }
.nav-more-menu { left: auto; right: -18px; }
.hk-body .nav-submenu li a,
.nav-submenu li > .nav-label {
    display: block;
    padding: 9px 20px;
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}
.hk-body .nav-submenu li a:hover,
.nav-submenu li:hover > .nav-label { background: var(--light); color: var(--gold-ink); }
.nav-more-menu .nav-submenu { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 0 12px; }
.nav-more-menu .nav-caret { display: none; }

.nav-menu-utility { display: none; }

.hk-body .submit-manuscript-btn {
    flex: 0 0 auto;
    background: var(--navy);
    color: #fff;
    padding: 9px 18px;
    border-radius: 3px;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.65;
    white-space: nowrap;
}
.hk-body .submit-manuscript-btn:hover,
.hk-body .submit-manuscript-btn:focus { background: var(--navy-2); color: var(--gold-2); }

.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    padding: 0;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 3px;
    color: var(--navy);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
}
.mobile-menu-toggle:hover { border-color: var(--gold); color: var(--gold); }
.header-nav-mobile { display: none; }
.mobile-nav-toggle { display: none; }

/* ---------- Shared building blocks ---------- */
.hk-eyebrow {
    color: var(--gold);
    letter-spacing: 3px;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 10px;
}
.hk-eyebrow-light { color: var(--gold-2); font-size: 13px; }
.hk-body .hk-title { font-size: 36px; line-height: 1.2; margin-bottom: 16px; }
.hk-lead { color: var(--gray); max-width: 760px; margin-bottom: 40px; }
.hk-muted { color: var(--gray); }

.hk-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 14px;
    line-height: 1.65;
    border: 0;
    cursor: pointer;
}
.hk-body .hk-btn-navy { background: var(--navy); color: #fff; }
.hk-body .hk-btn-navy:hover { background: var(--navy-2); color: var(--gold-2); }
.hk-body .hk-btn-gold { background: var(--gold); color: var(--navy); }
.hk-body .hk-btn-gold:hover { background: var(--gold-2); color: var(--navy); }
.hk-body .hk-btn-ghost { border: 1px solid var(--navy); color: var(--navy); }
.hk-body .hk-btn-ghost:hover { background: var(--navy); color: #fff; }
.hk-body .hk-btn-ghost-light { border: 1px solid rgba(255, 255, 255, .4); color: #fff; }
.hk-body .hk-btn-ghost-light:hover { border-color: var(--gold-2); color: var(--gold-2); }

.hk-body .hk-arrow-link { color: var(--navy); font-weight: 600; font-size: 14px; white-space: nowrap; }
.hk-body .hk-arrow-link b { color: var(--gold); font-weight: 600; transition: margin .2s ease; }
.hk-body .hk-arrow-link:hover { color: var(--gold-ink); }
.hk-body .hk-arrow-link:hover b { margin-left: 3px; }
.hk-body .hk-link-underline { color: var(--navy); font-weight: 600; font-size: 14px; border-bottom: 2px solid var(--gold); padding-bottom: 1px; }
.hk-body .hk-link-underline:hover { color: var(--gold-ink); border-bottom-color: var(--navy); }

/* Pill tags — copied from hanjiang index/journals .tag (journal-single uses 3px 10px) */
.hk-tag {
    display: inline-block;
    font-family: var(--sans);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.65;
    letter-spacing: normal;
    text-transform: none;
    padding: 3px 9px;
    border: 0;
    border-radius: 20px;
    margin-right: 6px;
    margin-bottom: 10px;
    vertical-align: baseline;
}
.hk-tag-g { background: #FEF3C7; color: #92400E; }
.hk-tag-b { background: #DBEAFE; color: #1E40AF; }
.hk-tag-t { background: #D1FAE5; color: #065F46; }

/* Portrait placeholder (no cover uploaded): hanjiang .jcover gradient + title */
.hk-jcover-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 18px 14px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 4px;
    background: linear-gradient(160deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .02));
}
.hk-jcover-text::before { content: ""; display: block; width: 28px; height: 2px; background: var(--gold-2); margin-bottom: 14px; }
.hk-jt { display: block; font-family: var(--serif); font-size: 18px; line-height: 1.3; color: #fff; }
.hk-js { display: block; font-family: var(--sans); font-size: 11px; letter-spacing: 2px; margin-top: 8px; color: var(--gold-2); text-transform: uppercase; }

.hk-section-title { font-size: 24px; line-height: 1.65; color: var(--navy); margin: 36px 0 14px; }
.hk-section-title::after { content: ""; display: block; width: 50px; height: 3px; background: var(--gold); margin-top: 8px; }
.hk-section-title:first-child { margin-top: 0; }

.hk-empty {
    background: var(--light);
    border-left: 3px solid var(--gold);
    border-radius: 0 6px 6px 0;
    padding: 22px 26px;
    color: var(--gray);
}
.hk-empty p { margin: 0; }

/* ---------- Page hero (hanjiang .page-hero / .article-hero) ---------- */
.hk-page-hero,
.hk-article-hero {
    position: relative;
    color: #fff;
    background: linear-gradient(115deg, rgba(15, 37, 64, .92), rgba(30, 58, 95, .85)), url('../images/hero-reading.jpg') center/cover no-repeat;
    padding: 90px 0;
}
.hk-page-hero-sm { padding: 90px 0; }
.hk-page-hero-news,
.hk-article-hero-news { background-image: linear-gradient(115deg, rgba(15, 37, 64, .9), rgba(30, 58, 95, .82)), url('../images/hero-conference.jpg'); }
.hk-body .hk-page-hero h1,
.hk-body .hk-article-hero h1 { color: #fff; font-size: 46px; line-height: 1.65; max-width: 800px; margin: 0; }
.hk-page-hero p { color: #e2e8f0; max-width: 760px; margin: 14px 0 0; font-size: 17px; }
.hk-article-hero { padding: 90px 0 100px; background-image: linear-gradient(115deg, rgba(15, 37, 64, .9), rgba(30, 58, 95, .82)), url('../images/hero-conference.jpg'); }
.hk-article-hero-inner { max-width: 948px; }
.hk-page-hero .hk-eyebrow { font-weight: 400; margin-bottom: 14px; }
.hk-body .hk-article-hero h1 { font-size: 44px; line-height: 1.2; max-width: 900px; }
.hk-article-meta { margin-top: 22px; color: #e2e8f0; font-size: 14px; display: flex; gap: 20px; flex-wrap: wrap; }
.hk-article-meta > span + span::before { content: "·"; margin-right: 10px; color: var(--gold); }
.hk-article-meta i { color: var(--gold); }

/* Crumb on dark heroes (hanjiang .crumb) */
.hk-crumb { font-size: 13px; color: var(--strip); margin-bottom: 18px; }
.hk-body .hk-crumb a { color: var(--gold-2); }
.hk-body .hk-crumb a:hover { color: #fff; }
.hk-crumb-sep { margin: 0 4px; color: #cbd5e0; }

/* Shared breadcrumb partial (Bootstrap .breadcrumb reset) */
.breadcrumb-nav { margin: 0 0 18px; }
.breadcrumb-nav .breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    border-radius: 0;
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
}
.breadcrumb-nav .breadcrumb > li { display: inline-flex; align-items: center; color: var(--gray); }
.breadcrumb-nav .breadcrumb > li + li::before { content: "/"; padding: 0 8px; color: #a0aec0; }
.hk-body .breadcrumb-nav .breadcrumb a { color: var(--navy); font-weight: 500; }
.hk-body .breadcrumb-nav .breadcrumb a:hover { color: var(--gold); }
.breadcrumb-nav .breadcrumb-item.active span { color: var(--gray); }
/* breadcrumb inside a navy hero */
/* hanjiang .crumb: 13px, #cbd5e0 text, gold-2 links, " / " separators, 18px below */
.hk-crumb-wrap .breadcrumb-nav { margin: 0 0 18px; }
.hk-crumb-wrap .breadcrumb { font-family: var(--sans); font-size: 13px; line-height: 1.65; font-weight: 400; }
.hk-crumb-wrap .breadcrumb > li { color: #cbd5e0; }
.hk-crumb-wrap .breadcrumb > li + li::before { content: "/"; padding: 0 4px; color: #cbd5e0; }
.hk-body .hk-crumb-wrap .breadcrumb a { color: var(--gold-2); font-weight: 400; }
.hk-body .hk-crumb-wrap .breadcrumb a:hover { color: #fff; }
.hk-crumb-wrap .breadcrumb-item.active span { color: var(--strip); }
.hk-crumb-wrap .breadcrumb-nav:empty,
.hk-crumb-wrap .breadcrumb:empty { display: none; }

/* Pagination (ThinkPHP paginator renders Bootstrap-3 style ul.pagination) */
.hk-pagination { margin-top: 40px; display: flex; justify-content: center; }
.hk-pagination .pagination { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; border-radius: 0; }
.hk-pagination .pagination > li { display: inline-block; }
.hk-pagination .pagination > li > a,
.hk-pagination .pagination > li > span {
    float: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    margin: 0;
    border: 1px solid var(--line);
    border-radius: 3px !important;
    background: #fff;
    color: var(--navy);
    font-weight: 600;
    font-size: 14px;
}
.hk-body .hk-pagination .pagination > li > a:hover { background: var(--light); border-color: var(--gold); color: var(--gold-ink); }
.hk-pagination .pagination > .active > span,
.hk-pagination .pagination > .active > a { background: var(--navy); border-color: var(--navy); color: #fff; }
.hk-pagination .pagination > .disabled > span { color: #a0aec0; background: #fff; }

/* Generic page content (custom_page / submissions / website types) */
.hk-page-container { min-height: 280px; }
/* navHtml is backend-generated markup with inline styles; normalise it into a hanjiang-style link bar */
.hk-nav-block { margin: 0 0 32px; padding: 16px 22px; background: var(--light); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: 6px; }
.hk-nav-block > ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 28px; }
.hk-nav-block li { margin: 0 !important; }
.hk-nav-block li > span { color: var(--gray) !important; font-weight: 600; font-size: 13px; letter-spacing: .04em; text-transform: uppercase; }
.hk-nav-block li > div { display: inline-block; margin-left: 10px !important; }
.hk-nav-block li > div > ul { list-style: none; padding: 0; margin: 0; display: inline-flex; flex-wrap: wrap; gap: 4px 16px; }
.hk-body .hk-nav-block a { color: var(--navy) !important; font-weight: 500; font-size: 14px; border-bottom: 1px solid transparent; }
.hk-body .hk-nav-block a:hover,
.hk-body .hk-nav-block a:focus { color: var(--gold-ink) !important; border-bottom-color: var(--gold); }
.hk-article-meta .announcement-date { color: inherit; font-size: inherit; }
.hk-cat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.hk-cat-item { border: 1px solid var(--line); border-top: 3px solid var(--gold); border-radius: 6px; padding: 26px; }
.hk-cat-title { font-size: 20px; margin-bottom: 10px; }

.hk-sub-list { display: flex; flex-direction: column; }
.hk-sub-item { padding: 24px 0; border-bottom: 1px solid var(--line); }
.hk-sub-item:first-child { padding-top: 0; }
.hk-sub-item .journal-title { font-size: 21px; margin-bottom: 8px; }
.hk-sub-item .journal-meta { display: flex; flex-wrap: wrap; gap: 6px 22px; font-size: 13px; color: var(--gray); margin-bottom: 10px; }
.hk-sub-item .journal-description { color: #2d3748; font-size: 15px; margin-bottom: 12px; }

/* Search bar (template .search-bar) — shared by home hero + archive search hero */
.hk-search-bar { display: flex; max-width: 680px; background: #fff; border-radius: 4px; overflow: hidden; box-shadow: 0 10px 30px rgba(0, 0, 0, .2); }
.hk-search-bar input { flex: 1; min-width: 0; border: 0; padding: 16px 20px; font-size: 15px; font-family: var(--sans); color: var(--ink); outline: none; }
.hk-search-bar button { background: var(--gold); color: var(--navy); border: 0; padding: 0 28px; font-weight: 600; font-family: var(--sans); cursor: pointer; transition: background-color .2s ease; }
.hk-search-bar button:hover { background: var(--gold-2); }
.hk-search-hero .hk-search-bar { margin-top: 26px; }
.hk-search-keyword { color: var(--gold-2); }

/* Selects / filter options (template .filter-bar select) */
.hk-select { padding: 9px 12px; border: 1px solid var(--line); border-radius: 4px; font-family: inherit; font-size: 14px; color: var(--ink); background: #fff; max-width: 100%; }
.hk-select:disabled { color: var(--gray); opacity: 1; }
.hk-filter-list { display: flex; flex-direction: column; gap: 8px; max-height: 320px; overflow-y: auto; }
.hk-filter-option { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: var(--gray); font-weight: 400; margin: 0; cursor: pointer; }
.hk-filter-option input { margin-top: 4px; accent-color: var(--navy); }
.hk-info-card .hk-select { width: 100%; }

/* ---------- Responsive header ---------- */
@media (max-width: 1199px) {
    .nav-menu { gap: 22px; }
    .header-container { gap: 20px; }
}

@media (max-width: 991px) {
    .mobile-menu-toggle { display: inline-flex; }
    .header-container { gap: 14px; padding-top: 14px; padding-bottom: 14px; }
    .header-logo { flex: 1 1 auto; }
    .logo-image { max-height: 40px; max-width: 200px; }

    .header-nav-desktop { display: none !important; }
    .header-nav,
    .header-nav-mobile {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        border-top: 3px solid var(--gold);
        box-shadow: 0 16px 30px rgba(15, 37, 64, .15);
        max-height: calc(100vh - 110px);
        overflow-y: auto;
        z-index: 1100;
    }
    .header-nav.active,
    .header-nav-mobile.active { display: block; }
    .header-nav .nav-menu { flex-direction: column; align-items: stretch; gap: 0; }
    .nav-menu > li { border-bottom: 1px solid var(--line); }
    .hk-body .header-nav .nav-menu > li > a,
    .header-nav .nav-menu > li > .nav-label,
    .header-nav .nav-menu > li > .mobile-nav-label {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 14px 24px;
        font-size: 15px;
        color: var(--ink);
        white-space: normal;
        cursor: pointer;
    }
    .hk-body .header-nav .nav-menu > li > a:hover { color: var(--gold-ink); background: var(--light); }
    .nav-more { display: none !important; }
    .mobile-nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 30px;
        height: 30px;
        font-size: 20px;
        color: var(--gold);
        transition: transform .2s ease;
    }
    .nav-menu > li.active > a .mobile-nav-toggle,
    .nav-menu > li.active > .mobile-nav-label .mobile-nav-toggle { transform: rotate(90deg); }
    .mobile-nav-submenu { display: none; list-style: none; margin: 0; padding: 0 0 8px; background: var(--light); }
    .nav-menu > li.active .mobile-nav-submenu { display: block; }
    .hk-body .mobile-nav-submenu li a { display: block; padding: 10px 24px 10px 40px; font-size: 14px; color: var(--gray); }
    .hk-body .mobile-nav-submenu li a:hover { color: var(--gold-ink); }
    .nav-menu-utility { display: block; padding: 14px 24px; background: var(--light); }
    .hk-body .header-nav .nav-menu > li.nav-menu-utility > a.nav-utility-link { display: flex; justify-content: flex-start; align-items: center; gap: 8px; padding: 8px 0; font-size: 14px; color: var(--navy); }
    .hk-body .header-nav .nav-menu > li.nav-menu-utility > a.nav-utility-link:hover { color: var(--gold-ink); background: transparent; }
    .nav-menu-utility .nav-utility-link i { width: 18px; color: var(--gold); }

    .hk-page-hero, .hk-article-hero { padding: 64px 0; }
    .hk-body .hk-page-hero h1 { font-size: 36px; }
    .hk-body .hk-article-hero h1 { font-size: 32px; }
    .hk-cat-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
    .hk-container { padding: 0 18px; }
    .hk-wrap { padding-top: 48px; padding-bottom: 48px; }
    .hk-topstrip .hk-strip-text, .hk-topstrip .hk-strip-mail { display: none; }
    .hk-topstrip .hk-strip-user { margin-left: auto; white-space: nowrap; }
    .hk-topstrip .utility-nav { gap: 14px; font-size: 12px; }
    .hk-topstrip .utility-inner { gap: 12px; }
    .hk-body .submit-manuscript-btn { display: none; }
    .brand-name { font-size: 17px; }
    .brand-sub { display: none; }
    .hk-body .hk-title { font-size: 28px; }
    .hk-page-hero, .hk-article-hero { padding: 44px 0 48px; }
    .hk-body .hk-page-hero h1 { font-size: 30px; }
    .hk-body .hk-article-hero h1 { font-size: 26px; }
    .hk-section-title { font-size: 21px; }
}

/* ============================================================
   v4 — top strip right side: compact Sign in only
   ============================================================ */
.hk-body .hk-topstrip .login-button { font-weight: 500; font-size: 13px; color: var(--strip); gap: 5px; }
.hk-body .hk-topstrip .login-button:hover { color: var(--gold-2); }
.hk-topstrip .login-icon::before { font-size: 12px; }
/* journal pages: site navigation moved from the strip into the mobile menu */
.nav-menu-site .utility-nav { display: flex; flex-direction: column; }
@media (max-width: 991px) {
    .hk-body .header-nav .nav-menu > li.nav-menu-site a.nav-utility-link { display: flex; align-items: center; padding: 8px 0; font-size: 14px; color: var(--navy); }
}
@media (max-width: 680px) {
    .hk-topstrip .hk-strip-text { display: none; }
    .hk-topstrip .hk-strip-user { margin-left: auto; }
}
/* v4 mobile: template keeps the notice text in the strip and puts the burger on the right */
@media (max-width: 991px) {
    .header-logo { order: 1; }
    .hk-body .submit-manuscript-btn { order: 2; }
    .mobile-menu-toggle { order: 3; margin-left: auto; }
}
@media (max-width: 680px) {
    .hk-topstrip .hk-strip-text { display: flex; flex: 1 1 auto; min-width: 0; font-size: 12px; line-height: 1.45; }
    .hk-topstrip .hk-strip-user { flex: 0 0 auto; margin-left: 0; }
    .hk-topstrip .utility-inner { gap: 10px; }
    .hk-body .hk-topstrip .login-button { font-size: 12px; }
}