@charset "utf-8";
body {
    font-family: sans-serif;
    font-weight: 400;
    padding-top: 5.0rem;
}

/* Link styling - black with underline */
a {
    color: black;
    text-decoration: underline;
}

a:hover {
    color: black;
    text-decoration: underline;
}

/* Navigation bar links - no underline */
.navbar a,
.navbar .nav-link,
.navbar .navbar-brand {
    text-decoration: none !important;
}

.container {
    max-width: 1580px;
}

/* Card styling improvements */
.card {
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

.bg-white.shadow-sm {
    transition: box-shadow 0.3s ease;
}

.bg-white.shadow-sm:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-weight: 500;
}

.text-profile-position {
    font-weight: 400;
    color: #212529;
    font-size: 0.95rem;
    line-height: 1.6;
}

.profile-portrait {
    height: 250px;
    width: 250px;
    object-fit: cover;
    border: 3px solid #e9ecef;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-portrait:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.text-profile-bio {
    /* font-family: "Raleway"; */
    font-weight: 400;
}

.navbar {
    opacity: 0.98;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 600;
    color: #212529 !important;
    transition: color 0.2s ease;
}

.navbar-brand:hover {
    color: #007bff !important;
}

.nav-link {
    font-weight: 500;
    color: #495057 !important;
    padding: 0.5rem 1rem !important;
    margin: 0 0.2rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: #007bff !important;
    background-color: #f8f9fa;
    text-decoration: none !important;
}

.nav-item.active .nav-link {
    color: #007bff !important;
    background-color: #e7f3ff;
    font-weight: 600;
}

.navbar-toggler {
    border: none !important;
    padding: 0.4rem 0.6rem;
}

.navbar-toggler:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.inline-badge {
    height: 16px;
    vertical-align: -10%;
    margin-right: 2px;
    line-break: unset;
}

.no-break {
    white-space: nowrap;
}

.cover-image {
    width: 180px;
    max-height: 120px;
}

.abstract-body {
    min-height: 100px;
}

img.lazy {
    background-image: url('images/loading.gif');
    background-repeat: no-repeat;
    background-position: 50% 50%;
    background-size: 50px 50px;
    min-height: 80px;
}

.badge-publication {
    font-size: 0.75rem;
    font-weight: normal;
    padding: 0.2em 0.6em;
    margin-left: 0.5em;
    opacity: 0.8;
}

.badge-success {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.badge-warning {
    background-color: #fff3e0;
    color: #ef6c00;
}

.email-text {
    font-family: Courier, monospace;
}

.social-link:hover .fa-question-circle {
    color: #0084ff;
}

/* Analytics Styling */
.analytics-container {
    padding: 1rem;
}

.analytics-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.analytics-item {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    font-size: 0.9rem;
    color: #495057;
    transition: all 0.3s ease;
}

.analytics-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.analytics-item i {
    margin-right: 0.5rem;
    color: #007bff;
}

.visitor-map {
    margin-top: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .analytics-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .analytics-item {
        margin-bottom: 0.5rem;
    }
}

/* Position Styling */
.position-line {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: #212529;
    line-height: 1.5;
}

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

.position-item {
    margin-bottom: 0.8rem;
}

.position-item:last-child {
    margin-bottom: 0;
}

.social-section-header {
    font-size: 1rem;
    font-weight: 600;
    color: #495057;
    margin-bottom: 1rem;
    text-align: center;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #dee2e6;
}

.social-links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    align-items: center;
    margin-top: 0;
}

.social-link-item {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: #495057;
    transition: all 0.2s ease;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    border-bottom: 1px solid transparent;
    background-color: transparent;
}

.social-link-item:hover {
    color: #007bff;
    border-bottom-color: #007bff;
    text-decoration: none;
    transform: translateY(-1px);
    background-color: #f8f9fa;
}

.social-link-item i {
    font-size: 1.2rem;
    margin-right: 0.5rem;
    width: 20px;
    text-align: center;
}

.social-text {
    font-weight: 400;
    font-size: 0.9rem;
}

/* Individual Social Link Colors with Underline */
.email-link {
    border-bottom: 2px solid #007bff;
}

.email-link:hover {
    border-bottom-color: #0056b3;
    color: #0056b3;
}

.email-link:hover i {
    color: #0056b3;
}

.gscholar-link {
    border-bottom: 2px solid #007bff;
}

.gscholar-link:hover {
    border-bottom-color: #0056b3;
    color: #0056b3;
}

.gscholar-link:hover i {
    color: #0056b3;
}

.sscholar-link:hover {
    border-bottom-color: #17a2b8;
    color: #17a2b8;
}

.sscholar-link:hover i {
    color: #17a2b8;
}

.github-link {
    border-bottom: 2px solid #007bff;
}

.github-link:hover {
    border-bottom-color: #0056b3;
    color: #0056b3;
}

.github-link:hover i {
    color: #0056b3;
}

.wechat-link:hover {
    border-bottom-color: #07c160;
    color: #07c160;
}

.wechat-link:hover i {
    color: #07c160;
}

.twitter-link:hover {
    border-bottom-color: #1da1f2;
    color: #1da1f2;
}

.twitter-link:hover i {
    color: #1da1f2;
}

.linkedin-link {
    border-bottom: 2px solid #007bff;
}

.linkedin-link:hover {
    border-bottom-color: #0056b3;
    color: #0056b3;
}

.linkedin-link:hover i {
    color: #0056b3;
}

.orcid-link:hover {
    border-bottom-color: #a6ce39;
    color: #a6ce39;
}

.orcid-link:hover i {
    color: #a6ce39;
}

.csdn-link:hover {
    border-bottom-color: #ff6b35;
    color: #ff6b35;
}

.csdn-link:hover i {
    color: #ff6b35;
}

.zhihu-link:hover {
    border-bottom-color: #0084ff;
    color: #0084ff;
}

.zhihu-link:hover i {
    color: #0084ff;
}

.researchgate-link:hover {
    border-bottom-color: #00dbb4;
    color: #00dbb4;
}

.researchgate-link:hover i {
    color: #00dbb4;
}

.dblp-link:hover {
    border-bottom-color: #ff6b35;
    color: #ff6b35;
}

.dblp-link:hover i {
    color: #ff6b35;
}

/* Responsive adjustments for social module */
@media (max-width: 768px) {
    .social-links-grid {
        gap: 0.8rem;
    }
    
    .social-module {
        padding: 1rem;
    }
    
    .social-link-item {
        padding: 0.3rem 0;
    }
}

/* ClustrMaps Styling */
.clustrmap-container {
    display: inline-block;
    max-width: 350px;
}

.clustrmap-container iframe {
    border-radius: 6px;
    border: none;
    max-width: 100%;
    height: auto;
}

/* Analytics Stats - Single Item Styling */
.analytics-stats {
    display: flex;
    justify-content: center;
    align-items: center;
}

.analytics-item {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    background: white;
    border-radius: 25px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    font-size: 1.1rem;
    color: #495057;
    transition: all 0.3s ease;
    border: 2px solid #007bff;
}

.analytics-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    border-color: #0056b3;
}

.analytics-item i {
    margin-right: 0.8rem;
    color: #007bff;
    font-size: 1.3rem;
}

#total-pageviews {
    font-weight: 600;
    color: #007bff;
    margin-right: 0.5rem;
}

/* News Item Styling */
.news-item:hover {
    background-color: #f8f9fa;
    border-left-color: #007bff;
    padding-left: 0.75rem;
}

/* R&D Interests tag hover effect */
.text-profile-bio a[href^="/ai-for"],
.text-profile-bio a[href^="/llm"] {
    transition: all 0.2s ease;
}

.text-profile-bio a[href^="/ai-for"]:hover,
.text-profile-bio a[href^="/llm"]:hover {
    background-color: #cfe2ff !important;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-decoration: none;
}

/* Table of Contents Styling */
.toc-sidebar {
    position: fixed;
    right: 20px;
    top: 100px;
    width: 300px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: none;
}

.toc-sidebar.show {
    display: block;
}

.toc-header {
    font-weight: 600;
    font-size: 1rem;
    color: #212529;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #dee2e6;
}

.toc-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.toc-item {
    display: block;
    padding: 0.4rem 0.75rem;
    color: #495057;
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 4px;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.toc-item:hover {
    background-color: #f8f9fa;
    color: #007bff;
    text-decoration: none;
    transform: translateX(2px);
}

.toc-item.active {
    background-color: #e7f3ff;
    color: #007bff;
    font-weight: 500;
    border-left: 3px solid #007bff;
    padding-left: calc(0.75rem - 3px);
}

.toc-item.toc-h2 {
    font-weight: 500;
    padding-left: 0.75rem;
}

.toc-item.toc-h3 {
    font-weight: 400;
    padding-left: 1.5rem;
    font-size: 0.8rem;
}

.toc-item.toc-h4 {
    font-weight: 400;
    padding-left: 2.25rem;
    font-size: 0.75rem;
    color: #6c757d;
}

/* Responsive: Hide TOC on smaller screens */
@media (max-width: 1200px) {
    .toc-sidebar {
        display: none !important;
    }
}

/* Scrollbar styling for TOC */
.toc-sidebar::-webkit-scrollbar {
    width: 6px;
}

.toc-sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.toc-sidebar::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.toc-sidebar::-webkit-scrollbar-thumb:hover {
    background: #555;
}