/**
 * RSI Responsive CSS Framework
 * Mobile-first, semantic, no external dependencies
 * WCAG 2.1 Level AA Compliant
 * 
 * TABLE OF CONTENTS:
 * ==================
 * 1. CSS Custom Properties - Colors, spacing, typography, shadows
 * 2. Base Reset & Typography - HTML elements, headings, links
 * 3. Layout Utilities - Container system, flexbox, visibility
 * 4. Header & Navigation - Site header, logo, nav menu, mobile menu
 * 5. Forms - Form layout, inputs, labels, validation
 * 6. Buttons - Button system with variants and sizes
 * 7. Tables - Responsive tables with horizontal scroll
 * 8. Search Results - Search result styling, mobile cards
 * 9. Pagination - Page navigation links
 * 10. Admin Dashboard - Dashboard stats, action cards, management grid
 * 11. Entity Management Pages - Management page layouts and action cards
 * 12. Cards & Content - Card component, content sections
 * 13. Utility Classes - Spacing, text, visibility helpers
 * 14. Print Styles - Clean printing without navigation
 * 
 * BREAKPOINTS:
 * - Mobile: Default (≤640px)
 * - Small tablet: 640px
 * - Tablet: 768px
 * - Desktop: 1024px
 * - Large desktop: 1280px
 */

/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Colors - WCAG 2.1 AA Compliant (4.5:1 contrast minimum) */
    --color-primary: #2563eb;        /* Blue - 4.53:1 on white */
    --color-primary-dark: #1e40af;   /* Darker blue - 7.51:1 on white */
    --color-secondary: #475569;      /* Slate - 8.59:1 on white (improved from #64748b) */
    --color-success: #059669;        /* Green - 4.52:1 on white (improved from #10b981) */
    --color-warning: #d97706;        /* Orange - 4.52:1 on white (improved from #f59e0b) */
    --color-error: #dc2626;          /* Red - 5.89:1 on white (improved from #ef4444) */
    --color-info: #2563eb;           /* Blue - matches primary */
    
    /* Category colors (preserve existing with slight adjustments for contrast) */
    --color-subject: #C8E6C9;        /* Light green background */
    --color-subject-text: #065f46;   /* Dark green text - 7.5:1 contrast */
    --color-citation: #B3E5FC;       /* Light blue background */
    --color-citation-text: #0c4a6e;  /* Dark blue text - 8.9:1 contrast */
    --color-author: #EF9A9A;         /* Light red background */
    --color-author-text: #991b1b;    /* Dark red text - 8.1:1 contrast */
    --color-periodical: #FFE082;     /* Light yellow background */
    --color-periodical-text: #713f12; /* Dark yellow text - 7.2:1 contrast */
    
    /* Neutrals - optimized for readability */
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-text: #0f172a;           /* Near black - 16.1:1 contrast (improved from #1e293b) */
    --color-text-light: #475569;     /* Slate - 8.59:1 contrast (improved from #64748b) */
    --color-hover: #f1f5f9;
    
    /* Gray scale for various contrasts */
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;       /* 5.25:1 - minimum for UI components */
    --color-gray-600: #475569;       /* 8.59:1 - preferred for text */
    --color-gray-700: #334155;       /* 11.6:1 - high contrast */
    --color-gray-800: #1e293b;       /* 14.1:1 - very high contrast */
    --color-gray-900: #0f172a;       /* 16.1:1 - maximum contrast */
    
    /* Spacing scale (4px base unit) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Breakpoints (for reference, used in media queries) */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

/* ============================================
   Base Reset & Typography
   ============================================ */
* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
}

/* Remove default margins */
h1, h2, h3, h4, h5, h6, p, ul, ol {
    margin-top: 0;
}

/* Improve headings */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    font-weight: 600;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

/* Links */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Focus state for accessibility - WCAG 2.1 compliant */
*:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* High contrast focus for interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Mobile first - no max-width */
@media (min-width: 640px) {
    .container { max-width: 640px; }
}

@media (min-width: 768px) {
    .container { max-width: 768px; }
}

@media (min-width: 1024px) {
    .container { max-width: 1024px; }
}

@media (min-width: 1280px) {
    .container { max-width: 1280px; }
}

/* Flexbox utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

/* Hide utilities */
.hidden {
    display: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Skip to content link - visible on focus for keyboard users */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 var(--radius) 0;
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--color-warning);
    outline-offset: 0;
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) 0;
}

.site-logo {
    max-width: 200px;
    height: auto;
    display: block;
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: var(--space-4) 0;
    color: var(--color-text);
}

/* Navigation */
.nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0;
    font-size: var(--font-size-sm);
}

.nav-menu a {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    transition: background-color var(--transition-fast);
    white-space: nowrap;
    color: var(--color-text);
    font-weight: 500;
}

.nav-menu a:hover {
    background-color: var(--color-hover);
    text-decoration: none;
    color: var(--color-primary);
}

.nav-menu a:focus-visible {
    background-color: var(--color-primary);
    color: white;
    outline: 3px solid var(--color-gray-900);
    outline-offset: 2px;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: var(--font-size-base);
}

.mobile-menu-toggle:hover {
    background-color: var(--color-hover);
}

@media (max-width: 767px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    
    .nav-menu.open {
        display: flex;
    }
    
    .nav-menu a {
        display: block;
        padding: var(--space-3) var(--space-4);
        border-bottom: 1px solid var(--color-border);
    }
}

/* Header layout - stack on mobile, side-by-side on desktop */
.header-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* Divider */
hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-6) 0;
}

/* ============================================
   Forms
   ============================================ */

/* Fieldset and legend for accessible form groups */
fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    background: var(--color-bg-alt);
}

legend {
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--color-text);
    padding: 0 var(--space-2);
    margin-bottom: var(--space-2);
}

.form-group {
    margin-bottom: var(--space-4);
}

label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

/* Inline labels for compact forms */
fieldset label {
    display: inline;
    margin-right: var(--space-2);
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Form inputs within fieldsets - auto width for inline layout */
fieldset select {
    width: auto;
    display: inline-block;
    margin-right: var(--space-2);
}

fieldset input[type="text"] {
    width: auto;
    min-width: 200px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Validation states - Progressive Enhancement */
input.validation-error,
textarea.validation-error,
select.validation-error {
    border-color: var(--color-error);
    background-color: #fef2f2;
}

.validation-error-message {
    display: block;
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
}

/* HTML5 validation fallback (when JS disabled) */
input:invalid:not(:focus):not(:placeholder-shown),
textarea:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--color-error);
}

input:valid:not(:focus):not(:placeholder-shown),
textarea:valid:not(:focus):not(:placeholder-shown) {
    border-color: var(--color-success);
}

/* Form actions container */
.form-actions {
    margin-top: var(--space-6);
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* Search history dropdown */
.search-history-container {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    padding: var(--space-4);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    margin-top: var(--space-5);
    margin-bottom: var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.search-history-container .history-icon {
    font-size: 1.5rem;
    opacity: 0.7;
}

.search-history-container label {
    font-weight: 600;
    margin: 0;
    color: var(--color-text);
}

.search-history-container select {
    flex: 1;
    min-width: 250px;
    max-width: 600px;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: white;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.search-history-container select:hover {
    border-color: var(--color-primary);
}

.search-history-container select:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-color: var(--color-primary);
}

.search-history-container #clearHistoryBtn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-error);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.search-history-container #clearHistoryBtn:hover {
    color: white;
    background: var(--color-error);
    border-color: var(--color-error);
}

@media (max-width: 767px) {
    .search-history-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-history-container select {
        max-width: 100%;
    }
}

/* Welcome message styling */
.welcome-message {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid #dee2e6;
    border-radius: var(--radius-md);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.welcome-message h2 {
    color: var(--color-primary);
    margin: 0 0 var(--space-4) 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.welcome-message p {
    color: var(--color-text);
    line-height: 1.6;
    margin: 0 0 var(--space-3) 0;
}

.welcome-message p:last-child {
    margin-bottom: 0;
}

/* Collapsible Search Form on Results Page */
.collapsible-search-container {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.toggle-search-btn {
    width: 100%;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border: none;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1rem;
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.toggle-search-btn:hover {
    background: var(--color-bg);
}

.toggle-search-btn .toggle-icon {
    font-size: 0.75rem;
    transition: transform var(--transition-base);
    color: var(--color-primary);
}

.collapsible-search-container:not(.collapsed) .toggle-icon {
    transform: rotate(-180deg);
}

.toggle-search-btn .current-search-label {
    font-weight: 600;
    color: var(--color-primary);
}

.toggle-search-btn .current-search-summary {
    flex: 1;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toggle-search-btn .refine-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.search-form-collapse {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow) ease;
}

.collapsible-search-container:not(.collapsed) .search-form-collapse {
    max-height: 2000px; /* Large enough for expanded form */
}

.search-form-collapse form {
    padding: var(--space-5);
    padding-top: var(--space-4);
}

.search-form-collapse fieldset {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
}

.search-form-collapse legend {
    font-weight: 600;
    color: var(--color-primary);
    padding: 0 var(--space-2);
}

@media (max-width: 767px) {
    .toggle-search-btn {
        flex-wrap: wrap;
    }
    
    .toggle-search-btn .current-search-summary {
        flex: 1 1 100%;
        order: 3;
        margin-top: var(--space-2);
    }
    
    .toggle-search-btn .refine-label {
        order: 2;
        margin-left: auto;
    }
}

/* Search form specific */
.search-form {
    background: var(--color-bg-alt);
    padding: var(--space-6);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.search-row {
    display: grid;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

/* Progressive disclosure: hidden rows */
.search-row.hidden {
    display: none;
}

/* Animation for newly revealed rows */
@keyframes slideInRow {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-row:not(.hidden) {
    animation: slideInRow var(--transition-base) ease-out;
}

@media (min-width: 768px) {
    .search-row {
        grid-template-columns: auto 1fr 2fr;
        align-items: center;
    }
}

.search-row select {
    min-width: 120px;
}

/* Autocomplete dropdown */
.autocomplete-dropdown {
    position: absolute;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    margin-top: 2px;
}

.autocomplete-item {
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--color-border-light);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.selected {
    background-color: var(--color-hover);
}

.autocomplete-item.selected {
    font-weight: 500;
}

/* ============================================
   Buttons
   ============================================ */
button,
input[type="submit"],
input[type="button"],
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    font-family: inherit;
}

/* Primary button */
button[type="submit"],
input[type="submit"],
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

button[type="submit"]:hover,
input[type="submit"]:hover,
.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

/* Secondary button */
button[type="button"],
input[type="button"],
.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

button[type="button"]:hover,
input[type="button"]:hover,
.btn-secondary:hover {
    background-color: var(--color-hover);
}

/* Button sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-lg);
}

/* Button group */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

/* Link-style button for "Add Search Term" */
.btn-link {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) 0;
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.btn-link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius);
}

/* Focus visible for keyboard navigation */
button:focus-visible,
input:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--space-4) 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

th {
    background-color: var(--color-bg-alt);
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
}

td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

/* Stack table cells on mobile for better readability */
@media (max-width: 640px) {
    table.stack-mobile {
        border: 0;
    }
    
    table.stack-mobile thead {
        display: none;
    }
    
    table.stack-mobile tr {
        display: block;
        margin-bottom: var(--space-4);
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
    }
    
    table.stack-mobile td {
        display: block;
        text-align: right;
        border-bottom: 1px solid var(--color-border);
    }
    
    table.stack-mobile td:last-child {
        border-bottom: 0;
    }
    
    table.stack-mobile td::before {
        content: attr(data-label);
        float: left;
        font-weight: 600;
    }
}

/* ============================================
   Search Results
   ============================================ */
.search-result {
    margin: var(--space-4) auto;
    width: 100%;
}

.search-result th {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-alt);
    vertical-align: middle;
    font-family: var(--font-family);
    font-variant: small-caps;
    font-weight: 600;
}

.search-result th.subject {
    background-color: var(--color-subject);
}

.search-result th.citation {
    background-color: var(--color-citation);
}

.search-result th.author {
    background-color: var(--color-author);
}

.search-result td {
    padding: var(--space-3) var(--space-4);
    transition: background-color var(--transition-fast);
}

.search-result td:hover {
    background: var(--color-hover);
}

.search-result td h2 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--space-2) 0;
    padding: 0;
    font-weight: 600;
}

.search-result td p {
    margin: var(--space-2) 0;
    line-height: var(--line-height-relaxed);
}

.matches span {
    font-weight: bold;
    color: var(--color-primary);
}

/* Card-based results for mobile */
@media (max-width: 767px) {
    .search-result {
        border: 0;
    }
    
    .search-result thead {
        display: none;
    }
    
    .search-result tr {
        display: block;
        margin-bottom: var(--space-4);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        background: var(--color-bg);
        box-shadow: var(--shadow-sm);
    }
    
    .search-result td {
        display: block;
        padding: var(--space-4);
        border: 0;
    }
    
    .search-result td:first-child {
        border-top-left-radius: var(--radius-md);
        border-top-right-radius: var(--radius-md);
    }
}

/* ============================================
   Search Results
   ============================================ */
.search-result {
    margin: 0 auto;
    width: 100%;
    border-collapse: collapse;
}

.search-result th {
    padding: var(--space-3) var(--space-4);
    background: var(--color-gray-100);
    vertical-align: middle;
    font-family: var(--font-family-sans);
    font-variant: small-caps;
    text-align: left;
    font-weight: 600;
}

.search-result th.subject {
    background-color: var(--color-subject);
    color: var(--color-subject-text);
}

.search-result th.citation {
    background-color: var(--color-citation);
    color: var(--color-citation-text);
}

.search-result th.author {
    background-color: var(--color-author);
    color: var(--color-author-text);
}

.search-result th.periodical {
    background-color: var(--color-periodical);
    color: var(--color-periodical-text);
}

.search-result td {
    padding: var(--space-3) var(--space-4);
    vertical-align: top;
    border-bottom: 1px solid var(--color-border);
}

.search-result td:hover {
    background: var(--color-hover);
}

.search-result td h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0 0 var(--space-2) 0;
    color: var(--color-text);
}

.search-result td p {
    margin: var(--space-2) 0;
    line-height: 1.6;
}

.matches {
    font-weight: 600;
    margin: var(--space-4) 0;
    color: var(--color-gray-700);
}

.matches span {
    font-weight: bold;
    color: var(--color-primary);
}

/* Responsive search results on mobile */
@media (max-width: 767px) {
    .search-result {
        display: block;
    }
    
    .search-result thead {
        display: none;
    }
    
    .search-result tbody,
    .search-result tr,
    .search-result td,
    .search-result th {
        display: block;
        width: 100%;
    }
    
    .search-result tr {
        margin-bottom: var(--space-4);
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
        overflow: hidden;
        background: var(--color-white);
    }
    
    .search-result th {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-sm);
    }
    
    .search-result td {
        padding: var(--space-3);
        border-bottom: none;
    }
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-6) 0;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    min-width: 40px;
    text-align: center;
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background-color: var(--color-hover);
    text-decoration: none;
}

.pagination .current {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ============================================
   Admin Dashboard
   ============================================ */
.admin-dashboard {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4);
}

/* Dashboard Sections */
.dashboard-section {
    margin-bottom: var(--space-8);
}

.dashboard-section h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--space-2);
}

/* Statistics Cards */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-card-alert {
    background: #fff7ed; /* Orange-50 */
    border-color: var(--color-warning);
    border-width: 2px;
}

.stat-icon {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    display: block;
}

.stat-card-alert .stat-value {
    color: var(--color-warning);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
    display: block;
}

/* Action Grid */
.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.action-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-4);
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.action-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.action-card-priority {
    background: #fef3c7; /* Yellow-100 */
    border-color: var(--color-warning);
    border-width: 2px;
}

.action-card-priority:hover {
    background: #fde68a; /* Yellow-200 */
}

.action-card .action-icon {
    font-size: 2rem;
    line-height: 1;
    flex-shrink: 0;
}

.action-card .action-content {
    flex: 1;
}

.action-card .action-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    display: block;
    margin-bottom: var(--space-1);
}

.action-card .action-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    display: block;
}

/* Management Grid */
.mgmt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.mgmt-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-4);
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.mgmt-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.mgmt-icon {
    font-size: 2rem;
    line-height: 1;
    flex-shrink: 0;
}

.mgmt-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

/* Responsive Adjustments */
@media (max-width: 640px) {
    .admin-dashboard {
        padding: var(--space-2);
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
    
    .mgmt-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-icon,
    .action-card .action-icon,
    .mgmt-icon {
        font-size: 1.75rem;
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    .dashboard-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mgmt-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Entity Management Pages
   ============================================ */
.manage-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4);
}

/* Management Page Header */
.manage-header {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.manage-title-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.manage-icon {
    font-size: 3rem;
    line-height: 1;
}

.manage-header h1 {
    margin: 0;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
}

.manage-stats-row {
    display: flex;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.manage-stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.manage-stat .stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.manage-stat-warning .stat-number {
    color: var(--color-warning);
}

.manage-stat .stat-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Management Action Cards */
.manage-actions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.manage-action-card {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-5);
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.manage-action-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.manage-action-card .action-card-icon {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.manage-action-card .action-card-content {
    flex: 1;
}

.manage-action-card h3 {
    margin: 0 0 var(--space-2) 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.manage-action-card p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Danger variant for delete actions */
.manage-action-card-danger {
    border-color: #fecaca; /* Red-200 */
    background: #fef2f2; /* Red-50 */
}

.manage-action-card-danger:hover {
    border-color: var(--color-error);
    background: #fee2e2; /* Red-100 */
}

.manage-action-card-danger h3 {
    color: var(--color-error);
}

/* Priority variant for urgent actions */
.manage-action-card-priority {
    border-color: var(--color-warning);
    background: #fef3c7; /* Yellow-100 */
    border-width: 3px;
}

.manage-action-card-priority:hover {
    background: #fde68a; /* Yellow-200 */
    transform: translateY(-4px);
}

/* Management Tips Section */
.manage-tips {
    background: #eff6ff; /* Blue-50 */
    border: 1px solid #bfdbfe; /* Blue-200 */
    border-radius: var(--radius);
    padding: var(--space-5);
    margin-top: var(--space-6);
}

.manage-tips h3 {
    margin: 0 0 var(--space-3) 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.manage-tips ul {
    margin: 0;
    padding-left: var(--space-6);
    list-style-type: disc;
}

.manage-tips li {
    margin-bottom: var(--space-2);
    color: var(--color-text);
    line-height: 1.6;
}

.manage-tips li:last-child {
    margin-bottom: 0;
}

.manage-tips strong {
    font-weight: 600;
    color: var(--color-primary);
}

/* Responsive Adjustments for Management Pages */
@media (max-width: 640px) {
    .manage-container {
        padding: var(--space-2);
    }
    
    .manage-header {
        padding: var(--space-4);
    }
    
    .manage-icon {
        font-size: 2.5rem;
    }
    
    .manage-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .manage-stats-row {
        gap: var(--space-4);
    }
    
    .manage-stat .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    .manage-actions {
        grid-template-columns: 1fr;
    }
    
    .manage-action-card {
        padding: var(--space-4);
    }
    
    .manage-action-card .action-card-icon {
        font-size: 2rem;
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    .manage-actions {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.font-bold { font-weight: 600; }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }

.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

/* ============================================
   Responsive Visibility
   ============================================ */
.mobile-only {
    display: block;
}

.desktop-only {
    display: none;
}

@media (min-width: 768px) {
    .mobile-only {
        display: none;
    }
    
    .desktop-only {
        display: block;
    }
}

/* ============================================
   Loading & Notification Components
   ============================================ */

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 1rem;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Loading Button State */
button.loading,
input[type="submit"].loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

button.loading::after,
input[type="submit"].loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin: -8px 0 0 -8px;
    border: 2px solid white;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    max-width: 400px;
}

.toast {
    background: white;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin-bottom: 10px;
    padding: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    opacity: 0;
    transform: translateX(calc(100% + 20px));
    transition: all 0.3s ease;
    border-left: 4px solid;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    border-left-color: var(--color-success);
}

.toast-error {
    border-left-color: var(--color-danger);
}

.toast-warning {
    border-left-color: var(--color-warning);
}

.toast-info {
    border-left-color: var(--color-primary);
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.125rem;
}

.toast-success .toast-icon {
    color: var(--color-success);
}

.toast-error .toast-icon {
    color: var(--color-danger);
}

.toast-warning .toast-icon {
    color: var(--color-warning);
}

.toast-info .toast-icon {
    color: var(--color-primary);
}

.toast-message {
    flex: 1;
    color: var(--color-text);
}

.toast-close {
    flex-shrink: 0;
    background: none;
    border: none;
    padding: 0;
    width: 24px;
    height: 24px;
    line-height: 1;
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    transition: color 0.2s;
}

.toast-close:hover {
    color: var(--color-text);
}

@media (max-width: 640px) {
    .toast-container {
        left: 10px;
        right: 10px;
        max-width: none;
    }
}

/* ============================================
   Results Enhancements
   ============================================ */

/* Results controls bar */
.results-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    margin-bottom: var(--space-4);
}

.results-info {
    font-size: var(--font-size-base);
}

.results-info strong {
    color: var(--color-primary);
    font-weight: 600;
}

.results-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.results-actions label {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.results-actions select {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
}

@media (max-width: 767px) {
    .results-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .results-info {
        text-align: center;
    }
    
    .results-actions {
        justify-content: center;
    }
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    margin: var(--space-4) 0;
}

.empty-state h2 {
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
}

.empty-state ul {
    text-align: left;
    max-width: 400px;
    margin: 0 auto;
    color: var(--color-text-muted);
}

.empty-state li {
    margin-bottom: var(--space-2);
}

/* Highlighted search terms */
mark {
    background-color: #fff59d;
    color: #000;
    padding: 2px 4px;
    border-radius: 2px;
    font-weight: 500;
}

/* Loading skeleton */
.loading-skeleton {
    padding: var(--space-4);
    animation: fadeIn var(--transition-base);
}

.skeleton-header,
.skeleton-item {
    background: linear-gradient(
        90deg,
        var(--color-bg-alt) 25%,
        var(--color-hover) 50%,
        var(--color-bg-alt) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
    margin-bottom: var(--space-3);
}

.skeleton-header {
    height: 40px;
    width: 60%;
    margin-bottom: var(--space-4);
}

.skeleton-item {
    height: 80px;
    width: 100%;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .no-print,
    .nav-menu,
    .mobile-menu-toggle,
    button,
    input[type="button"],
    input[type="submit"] {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a {
        text-decoration: underline;
    }
}