/* ═══════════════════════════════════════════════════════════════════
   VIDWAN PUBLICATIONS — Stylesheet
   Color palette: Vidwan teal (#0097a7 / #00bcd4), dark navy (#0d2137),
   white, with amber accent for highlights
   Font: DM Sans (body) + Playfair Display (display)
═══════════════════════════════════════════════════════════════════ */

:root {
    --vid-teal: #0097a7;
    --vid-teal-dark: #006978;
    --vid-teal-light: #e0f7fa;
    --vid-teal-mid: #b2ebf2;
    --vid-navy: #0d2137;
    --vid-navy-mid: #1a3550;
    --vid-white: #ffffff;
    --vid-bg: #f4f8fb;
    --vid-bg-alt: #eaf4f6;
    --vid-amber: #f59e0b;
    --vid-amber-light: #fef3c7;
    --vid-text: #1a2e3b;
    --vid-text-mid: #4a6070;
    --vid-text-light: #7a9aaa;
    --vid-border: #cce4ea;
    --vid-shadow: rgba(0, 151, 167, 0.12);
    --vid-shadow-deep: rgba(13, 33, 55, 0.15);
    --sidebar-w: 280px;
    --header-h: 64px;
    --radius: 10px;
    --radius-sm: 6px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "DM Sans", sans-serif;
    background: var(--vid-bg);
    color: var(--vid-text);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

a {
    color: var(--vid-teal);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--vid-teal-dark);
}

#preloader {
    position: fixed;
    inset: 0;
    background: var(--vid-navy);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preloader-inner {
    text-align: center;
}

.preloader-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
}

.preloader-logo img {
    height: 48px;
}

.preloader-text {
    font-family: "Playfair Display", serif;
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 4px;
}

.preloader-bar {
    width: 180px;
    height: 3px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    overflow: hidden;
    margin: 0 auto;
}

.preloader-bar-fill {
    height: 100%;
    background: var(--vid-teal);
    border-radius: 10px;
    animation: preloader-fill 1.2s ease-in-out forwards;
}

@keyframes preloader-fill {
    from {
        width: 0;
    }

    to {
        width: 100%;
    }
}

#globalLoader {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(13, 33, 55, 0.45);
    backdrop-filter: blur(3px);
    z-index: 9990;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
}

.gl-ring {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--vid-teal);
    animation: gl-spin 0.9s linear infinite;
}

@keyframes gl-spin {
    to {
        transform: rotate(360deg);
    }
}

.gl-text {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    margin: 0;
    letter-spacing: 0.3px;
}

.vidwan-header {
    position: sticky;
    top: 0;
    height: var(--header-h);
    background: var(--vid-navy);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 24px;
    box-shadow: 0 2px 16px var(--vid-shadow-deep);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.header-brand img {
    height: 38px;
    filter: brightness(0) invert(1);
}

.header-page-title {
    font-size: 15px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.3px;
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.access-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 14px;
    background: rgba(0, 188, 212, 0.15);
    border: 1px solid rgba(0, 188, 212, 0.3);
    border-radius: 30px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--vid-teal-mid);
    white-space: nowrap;
}

.access-badge i {
    color: var(--vid-teal);
    font-size: 14px;
}

.header-inflibnet {
    display: flex;
    align-items: center;
    padding: 5px 12px;
    border-radius: 6px;
    text-decoration: none;
    transition: background var(--transition);
}

.header-inflibnet:hover {
    background: rgba(255, 255, 255, 0.08);
}

.header-inflibnet img {
    height: 40px;
    filter: brightness(0%) invert(100%) opacity(100%);
}

.pub-shell {
    display: flex;
    min-height: calc(100vh - var(--header-h));
    position: relative;
}

.pub-sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--vid-white);
    border-right: 1px solid var(--vid-border);
    padding: 0 0 40px;
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--vid-teal-mid) transparent;
}

.pub-sidebar::-webkit-scrollbar {
    width: 4px;
}

.pub-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.pub-sidebar::-webkit-scrollbar-thumb {
    background: var(--vid-teal-mid);
    border-radius: 4px;
}

.sidebar-header {
    position: sticky;
    top: 0;
    background: var(--vid-white);
    padding: 16px 18px 14px;
    border-bottom: 1px solid var(--vid-border);
    z-index: 5;
}

.sidebar-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--vid-navy);
    letter-spacing: 0.6px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0;
}

.sidebar-title i {
    color: var(--vid-teal);
    font-size: 15px;
}

#sidebarActiveFilters {
    display: none;
    padding: 12px 16px;
    background: var(--vid-teal-light);
    border-bottom: 1px solid var(--vid-teal-mid);
}

#sidebarActiveFilters.has-filters {
    display: block;
}

.saf-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--vid-teal-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.saf-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 8px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: default;
}

.filter-tag i {
    font-size: 10px;
    flex-shrink: 0;
}

.tag-year {
    background: #e3f2fd;
    color: #1565c0;
}

.tag-type {
    background: #f3e5f5;
    color: #6a1b9a;
}

.tag-onos {
    background: #e8f5e9;
    color: #2e7d32;
}

.tag-citation {
    background: #fff3e0;
    color: #e65100;
}

.tag-publisher {
    background: #fce4ec;
    color: #ad1457;
}

.tag-source {
    background: #e8f0fe;
    color: #174ea6;
}

.tag-gender {
    background: #ede7f6;
    color: #4527a0;
}

.tag-journal {
    background: #e0f2f1;
    color: #00695c;
}

.tag-oa {
    background: #e8eaf6;
    color: #283593;
}

.tag-x {
    margin-left: 3px;
    font-style: normal;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition);
}

.tag-x:hover {
    opacity: 1;
}

.saf-clear {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: 1px solid var(--vid-teal);
    color: var(--vid-teal-dark);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--transition);
}

.saf-clear:hover {
    background: var(--vid-teal);
    color: #fff;
}

.filter-widget {
    border-bottom: 1px solid var(--vid-border);
}

.widget-title {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--vid-navy-mid);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 13px 18px 11px;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition);
}

.widget-title:hover {
    background: var(--vid-bg);
}

.widget-title i.wt-icon {
    color: var(--vid-teal);
    font-size: 14px;
}

.widget-title .wt-chevron {
    margin-left: auto;
    font-size: 12px;
    color: var(--vid-text-light);
    transition: transform var(--transition);
}

.widget-title.collapsed .wt-chevron {
    transform: rotate(-90deg);
}

.filter-scroll-body {
    max-height: 220px;
    overflow-y: auto;
    padding: 4px 0;
}

.filter-scroll-body::-webkit-scrollbar {
    width: 4px;
}

.filter-scroll-body::-webkit-scrollbar-thumb {
    background: var(--vid-teal-mid);
    border-radius: 4px;
}

.form-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 18px;
    font-size: 13px;
    color: var(--vid-text);
    cursor: pointer;
    transition: background var(--transition);
}

.form-group:hover {
    background: var(--vid-bg);
}

.form-group input[type="checkbox"] {
    appearance: none;
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--vid-border);
    border-radius: 4px;
    position: relative;
    background: #fff;
    cursor: pointer;
}

.form-group input[type="checkbox"]:checked {
    border-color: var(--vid-teal);
    background: var(--vid-teal);
}

.form-group input[type="checkbox"]:checked::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.filter-label {
    flex: 1;
    color: var(--vid-text);
}

.filter-count {
    color: var(--vid-text-light);
    font-size: 12px;
    white-space: nowrap;
}

.filter-skeleton {
    padding: 8px 18px;
}

.fsk-row {
    height: 12px;
    background: linear-gradient(90deg, var(--vid-bg) 0%, var(--vid-border) 50%, var(--vid-bg) 100%);
    background-size: 200% 100%;
    border-radius: 4px;
    margin-bottom: 8px;
    animation: fsk-shine 1.5s infinite;
}

@keyframes fsk-shine {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.pub-main {
    flex: 1;
    padding: 20px 24px 28px;
    max-width: 100%;
}

.sticky-search {
    position: sticky;
    top: var(--header-h);
    background: #fff;
    margin-bottom: 12px;
    z-index: 3;
    box-shadow: 0 10px 28px rgba(13, 33, 55, 0.07);
    border: 1px solid rgba(204, 228, 234, 0.9);
    border-radius: 8px;
}

.search-bar-card {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr) 140px;
    gap: 10px;
    align-items: center;
    padding: 12px;
}

.search-field-select {
    min-width: 0;
}

.search-field-select select {
    width: 100%;
    border: 1px solid var(--vid-border);
    border-radius: 7px;
    padding: 9px 11px;
    background: #fff;
    color: var(--vid-text);
    font-size: 13px;
}

.search-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-wrap i {
    position: absolute;
    left: 14px;
    color: var(--vid-text-light);
}

.search-input-wrap input {
    width: 100%;
    border: 1px solid var(--vid-border);
    border-radius: 7px;
    padding: 10px 14px 10px 40px;
    font-size: 13px;
    color: var(--vid-text);
}

.btn-search-main {
    border: none;
    background: var(--vid-teal);
    color: #fff;
    border-radius: 7px;
    padding: 10px 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform var(--transition), background var(--transition);
}

.btn-search-main:hover {
    background: var(--vid-teal-dark);
}

.results-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 12px 0 12px;
    flex-wrap: wrap;
}

.results-count {
    font-size: 13px;
    color: var(--vid-text-mid);
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toolbar-select-wrap select {
    min-width: 150px;
    border: 1px solid var(--vid-border);
    border-radius: 7px;
    padding: 8px 11px;
    background: #fff;
    color: var(--vid-text);
    font-size: 13px;
}

.pub-card {
    position: relative;
    background: linear-gradient(180deg, #fff 0%, #fbfdfe 100%);
    border-radius: 8px;
    padding: 0;
    margin-bottom: 10px;
    box-shadow: 0 8px 24px rgba(13, 33, 55, 0.055);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    overflow: hidden;
    border: 1px solid rgba(204, 228, 234, 0.92);
}

.pub-card::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 3px;
    background: linear-gradient(180deg, var(--vid-teal), var(--vid-amber));
    opacity: 0.9;
}

.pub-card:hover {
    transform: translateY(-1px);
    border-color: rgba(0, 151, 167, 0.34);
    box-shadow: 0 12px 30px rgba(13, 33, 55, 0.08);
}

.pub-card-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    align-items: start;
    padding: 14px 16px 8px 18px;
    border-bottom: 0;
    background: transparent;
}

.pub-card-body {
    padding: 0 16px 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.pub-title {
    font-size: 15.5px;
    font-weight: 700;
    margin: 0;
    line-height: 1.34;
    color: var(--vid-navy);
}

.pub-title a {
    color: var(--vid-navy);
    text-decoration: none;
}

.pub-title a:hover {
    color: var(--vid-teal-dark);
    text-decoration: none;
}

.pub-meta-top {
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 6px;
    font-size: 12px;
    color: var(--vid-text-mid);
    flex-wrap: wrap;
}

.meta-year,
.meta-doctype {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border: 1px solid rgba(204, 228, 234, 0.9);
    border-radius: 999px;
    background: #fff;
    color: var(--vid-text-mid);
    line-height: 1;
}

.meta-year i,
.meta-doctype i {
    color: var(--vid-teal);
    font-size: 14px;
}

.pub-authors {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: flex-start;
}

.pub-authors-label {
    font-weight: 700;
    color: var(--vid-text-mid);
    font-size: 12px;
    margin-top: 1px;
}

.authors-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.author_info {
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 12px;
    color: var(--vid-text-mid);
    border: 0;
    cursor: pointer;
    transition: all var(--transition);
}

.author_info:not(:last-child)::after {
    content: ",";
}

.author_info:hover {
    color: var(--vid-teal-dark);
}

.author_more {
    display: inline-flex;
    align-items: center;
    padding: 1px 7px;
    border-radius: 999px;
    background: #f6fafb;
    border: 1px solid rgba(204, 228, 234, 0.9);
    color: var(--vid-teal-dark);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.4;
}

.pub-meta-details {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
    row-gap: 5px;
    padding: 0;
    color: var(--vid-text-mid);
}

.pub-meta-item {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    font-size: 12.5px;
    line-height: 1.35;
    min-width: 0;
}

.pub-meta-item i {
    color: var(--vid-teal);
    font-size: 13px;
    flex-shrink: 0;
    margin-top: 1px;
}

.pub-meta-item strong {
    color: var(--vid-navy);
    min-width: auto;
    font-weight: 700;
}

.pub-meta-item span {
    color: var(--vid-text);
    min-width: 0;
}

.pub-badges-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-top: 8px;
    border-top: 1px solid rgba(204, 228, 234, 0.75);
}

.pub-badges-main {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-width: 0;
}

.pub-badges-access {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
    flex-shrink: 0;
}

.pub-badge {
    padding: 4px 8px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 600;
    background: var(--vid-bg-alt);
    color: var(--vid-text-mid);
    display: inline-flex;
    align-items: center;
    gap: 3px;
    white-space: nowrap;
    border: 1px solid transparent;
    line-height: 1.15;
}

.pub-badge strong {
    color: var(--vid-navy);
}

.pub-badge a {
    color: inherit;
    text-decoration: none;
    font-weight: 600;
}

.pub-badge a:hover {
    text-decoration: underline;
}

.badge-scopus {
    background: #eaf4ff;
    color: #0b4f86;
    border-color: #9fd0f7;
}

.badge-scopus strong {
    color: #0b3f72;
}

.badge-citation {
    padding: 5px 9px 5px 6px;
    border-radius: 8px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(13, 76, 116, 0.08);
    gap: 6px;
}

.badge-citation i {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1;
    background: rgba(255, 255, 255, 0.9);
}

.badge-citation span {
    min-width: 22px;
    text-align: center;
    padding: 2px 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    color: inherit;
}

.badge-crossref {
    background: #f1f8ea;
    color: #33640f;
    border-color: #bfe29f;
}

.badge-crossref strong {
    color: #244d08;
}

.badge-doi {
    background: #f0f8f3;
    color: #246b36;
    border-color: #cdebd4;
    max-width: 420px;
}

.badge-doi a {
    overflow: hidden;
    text-overflow: ellipsis;
}

.badge-doi strong {
    color: #1b5e20;
}

.badge-access {
    background: #fff8ea;
    color: #a45405;
    font-weight: 600;
    border-color: #f4dfb1;
}

.badge-onos {
    background: #eaf8fb;
    color: #006978;
    font-weight: 600;
    border: 1px solid #a9dfe7;
}

.state-box {
    background: var(--vid-white);
    border: 1px solid var(--vid-border);
    border-radius: 18px;
    padding: 32px;
    text-align: center;
    color: var(--vid-text-mid);
}

.state-box i {
    font-size: 40px;
    color: var(--vid-teal);
    margin-bottom: 18px;
}

.state-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--vid-navy);
}

.state-sub {
    font-size: 14px;
    margin-bottom: 10px;
}

.state-hint {
    font-size: 12px;
    color: var(--vid-text-light);
    font-family: 'Courier New', monospace;
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--vid-bg-alt);
    border-radius: 6px;
}

.page-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 10px;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--vid-border);
    background: #fff;
    color: var(--vid-text);
    text-decoration: none;
    cursor: pointer;
}

.page-btn:hover {
    border-color: var(--vid-teal);
}

.page-btn.active {
    background: var(--vid-teal);
    border-color: var(--vid-teal);
    color: #fff;
}

.ellipsis {
    display: inline-flex;
    align-items: center;
    color: var(--vid-text-light);
}

#scroll-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--vid-teal);
    color: #fff;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: transform var(--transition), opacity var(--transition);
}

#scroll-top.visible {
    display: flex;
    opacity: 1;
}

#scroll-top:hover {
    transform: translateY(-2px);
}

.mobile-filter-btn {
    display: none;
    position: fixed;
    left: 20px;
    bottom: 20px;
    z-index: 100;
    padding: 12px 18px;
    border-radius: 999px;
    border: none;
    background: var(--vid-teal);
    color: #fff;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.12);
    cursor: pointer;
}

@media (max-width: 991px) {
    .pub-shell {
        flex-direction: column;
    }

    .pub-sidebar {
        position: fixed;
        top: var(--header-h);
        left: -100%;
        width: 100%;
        max-width: 320px;
        height: calc(100vh - var(--header-h));
        transition: left var(--transition);
        z-index: 1001;
        box-shadow: 4px 0 40px rgba(0, 0, 0, 0.08);
    }

    .pub-sidebar.mobile-open {
        left: 0;
    }

    .pub-main {
        padding: 20px;
    }

    .pub-card-header {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .pub-meta-top {
        align-items: center;
    }

    .pub-meta-details {
        grid-template-columns: 1fr;
    }

    .pub-badges-section {
        align-items: flex-start;
        flex-direction: column;
    }

    .pub-badges-access {
        justify-content: flex-start;
    }

    .mobile-filter-btn {
        display: inline-flex;
    }
}

@media (max-width: 575px) {
    .pub-main {
        padding: 14px;
    }

    .search-bar-card {
        grid-template-columns: 1fr;
    }

    .toolbar-right {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }

    .toolbar-select-wrap,
    .toolbar-select-wrap select {
        width: 100%;
    }

    .pub-card-header,
    .pub-card-body {
        padding-left: 14px;
        padding-right: 12px;
    }

    .pub-title {
        font-size: 14.5px;
    }

    .pub-badge {
        max-width: 100%;
    }
}