:root {
    --bg-primary: #f8fafc;
    --bg-surface: #ffffff;
    --border-color: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-blue: #2563eb;
    --accent-blue-glow: rgba(37, 99, 235, 0.1);
    --accent-purple: #7c3aed;
    --accent-purple-glow: rgba(124, 58, 237, 0.1);
    --accent-teal: #0d9488;
    --accent-teal-glow: rgba(13, 148, 136, 0.1);
    --accent-gold: #d97706;
    --accent-gold-glow: rgba(217, 119, 6, 0.1);
    
    --sidebar-width: 260px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --shadow-soft: 0 10px 25px -5px rgba(51, 65, 85, 0.05), 0 8px 16px -6px rgba(51, 65, 85, 0.03);
    --shadow-hover: 0 20px 30px -10px rgba(51, 65, 85, 0.1), 0 10px 20px -8px rgba(51, 65, 85, 0.05);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* Elegant Soft Background Blobs */
.glass-bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: pulse 15s infinite alternate;
}

.blob-1 {
    top: -10%;
    left: 10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #93c5fd 0%, transparent 80%);
}

.blob-2 {
    bottom: -10%;
    right: 10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, #c7d2fe 0%, transparent 80%);
    animation-delay: -5s;
}

.blob-3 {
    top: 30%;
    left: 40%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #99f6e4 0%, transparent 80%);
    animation-delay: -10s;
}

@keyframes pulse {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, 20px) scale(1.1); }
}

/* App Container Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styling - Sleek light theme */
.sidebar {
    width: var(--sidebar-width);
    background: #ffffff;
    border-right: 1px solid var(--border-color);
    padding: 2.2rem 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 10;
    box-shadow: 4px 0 20px rgba(51, 65, 85, 0.02);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 3rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.logo-text h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
}

.nav-item:hover {
    color: var(--accent-blue);
    background: #f1f5f9;
}

.nav-item.active {
    color: var(--accent-blue);
    background: rgba(37, 99, 235, 0.08);
    border-color: rgba(37, 99, 235, 0.12);
    font-weight: 600;
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.datasource-badge {
    background: #f8fafc;
    padding: 0.6rem 0.8rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-weight: 500;
}

.updated-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    font-weight: 500;
}

/* Main Content Styling */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background: transparent;
    overflow: hidden;
}

.content-header {
    padding: 1.5rem 2.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(51, 65, 85, 0.01);
}

.header-title h1 {
    font-family: var(--font-heading);
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.header-title p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.filter-group {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.filter-group select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    outline: none;
}

.btn {
    border-radius: 12px;
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.btn-refresh {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.btn-refresh:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
}

/* Dashboard Sections */
.dashboard-scroll-area {
    padding: 2rem 2.5rem;
    overflow-y: auto;
    flex-grow: 1;
}

.dashboard-section {
    display: none;
}

.dashboard-section.active {
    display: block;
}

/* KPI Cards Layout */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kpi-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.8rem;
}

.kpi-title {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.icon-blue { background: rgba(37, 99, 235, 0.08); color: var(--accent-blue); }
.icon-purple { background: rgba(124, 58, 237, 0.08); color: var(--accent-purple); }
.icon-teal { background: rgba(13, 148, 136, 0.08); color: var(--accent-teal); }
.icon-gold { background: rgba(217, 119, 6, 0.08); color: var(--accent-gold); }

.kpi-value {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.kpi-value.value-small {
    font-size: 1.2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kpi-footer {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.trend {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-weight: 600;
}

.trend-up { color: var(--accent-teal); }

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.chart-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-soft);
}

.large-chart {
    grid-column: span 2;
}

.chart-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}

/* Tables and In-page Content */
.section-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-height: 500px;
    box-shadow: var(--shadow-soft);
}

.section-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-box {
    position: relative;
    width: 320px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 0.65rem 1rem 0.65rem 2.5rem;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: #ffffff;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.08);
}

.table-container {
    width: 100%;
    overflow-x: auto;
    flex-grow: 1;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    padding: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background 0.15s ease;
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

.data-table td .title-link {
    color: var(--text-primary);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.15s ease;
    display: block;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.data-table td .title-link:hover {
    color: var(--accent-blue);
}

.data-table td .doi-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: #f1f5f9;
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: all 0.15s ease;
}

.data-table td .doi-badge:hover {
    background: var(--accent-blue-glow);
    color: var(--accent-blue);
    border-color: rgba(37, 99, 235, 0.2);
}

.data-table td .researcher-tags {
    font-size: 0.8rem;
    color: var(--text-primary);
}

.pagination-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pagination-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-nav {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.btn-nav:hover:not(:disabled) {
    background: #f1f5f9;
    color: var(--text-primary);
}

.btn-nav:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Researchers Section - Light grid */
.authors-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.author-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.2s ease;
}

.author-card:hover {
    transform: translateY(-3px);
    border-color: rgba(37, 99, 235, 0.25);
    box-shadow: var(--shadow-hover);
}

.author-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #dbeafe, #f3e8ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-blue);
    border: 1px solid var(--border-color);
}

.author-info h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.author-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.author-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.author-stat-item {
    display: flex;
    flex-direction: column;
}

.author-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.author-stat-value {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Clickable Author Card pointer */
.author-card {
    cursor: pointer;
}

/* Modal Overlay style */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Modal Card Style */
.modal-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 650px;
    max-height: 85vh;
    padding: 2.2rem;
    box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: #f1f5f9;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #e2e8f0;
    color: var(--text-primary);
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.modal-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #dbeafe, #f3e8ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
    border: 1.5px solid var(--border-color);
}

.modal-profile-info h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-profile-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.modal-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.modal-stat-card {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.modal-stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.modal-stat-card .stat-value {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-publications {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    overflow: hidden;
    flex-grow: 1;
}

.modal-publications h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    border-bottom: 1.5px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.modal-pub-list {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-right: 0.5rem;
    flex-grow: 1;
}

.modal-pub-list::-webkit-scrollbar {
    width: 6px;
}

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

.modal-pub-list::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.modal-pub-item {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem;
    transition: all 0.15s ease;
}

.modal-pub-item:hover {
    border-color: rgba(37, 99, 235, 0.2);
    background: #f8fafc;
}

.modal-pub-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.35rem;
}

.modal-pub-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Database Badges Style */
.db-badges {
    display: inline-flex;
    gap: 0.35rem;
    align-items: center;
    margin-left: 0.6rem;
    vertical-align: middle;
}

.db-badge {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    letter-spacing: 0.3px;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
}

.db-badge-scopus {
    background: rgba(37, 99, 235, 0.1);
    color: #2563eb;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.db-badge-pubmed {
    background: rgba(13, 148, 136, 0.1);
    color: #0d9488;
    border: 1px solid rgba(13, 148, 136, 0.2);
}

/* Print Layout Stylings for PDF Export */
@media print {
    body, html {
        height: auto !important;
        overflow: visible !important;
        background: #ffffff !important;
        color: #000000 !important;
        font-size: 10pt !important;
    }
    
    .glass-bg-blobs,
    .sidebar,
    .admin-controls,
    .modal-overlay,
    .toast-notification,
    .modal-close,
    #btn-global-save {
        display: none !important;
    }
    
    .app-container {
        display: block !important;
        height: auto !important;
    }
    
    .main-content {
        margin-left: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        height: auto !important;
        overflow: visible !important;
    }
    
    .dashboard-scroll-area {
        overflow: visible !important;
        height: auto !important;
        padding: 0 !important;
    }
    
    .section-card {
        background: #ffffff !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    /* Document header for print output only */
    .main-content::before {
        content: "Research Publications Report\A Faculty of Medicine, Naresuan University\A Generated on: " attr(data-date) "\A";
        white-space: pre-wrap;
        display: block;
        font-family: 'Outfit', sans-serif;
        font-size: 18pt;
        font-weight: bold;
        margin-bottom: 20px;
        border-bottom: 2px solid #334155;
        padding-bottom: 10px;
    }
    
    .content-header {
        display: none !important;
    }
    
    .data-table {
        width: 100% !important;
        border-collapse: collapse !important;
    }
    
    .data-table th, .data-table td {
        border: 1px solid #cbd5e1 !important;
        padding: 6px 8px !important;
        background: transparent !important;
        color: #0f172a !important;
    }
    
    .data-table th {
        background-color: #f1f5f9 !important;
        font-weight: bold !important;
    }
    
    .db-badge {
        border: 1px solid #94a3b8 !important;
        background: transparent !important;
        color: #0f172a !important;
    }
}

/* Summary Table and Sort Styles */
.summary-table {
    width: 100%;
    margin-bottom: 1.5rem;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}
.summary-table th, .summary-table td {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.summary-table th {
    background: rgba(241, 245, 249, 0.6);
    font-weight: 600;
    color: var(--text-secondary);
}
.summary-table tr:last-child td {
    border-bottom: none;
}
.sortable-header:hover {
    background: rgba(0, 0, 0, 0.03) !important;
}
.sortable-header i {
    margin-left: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}