/* E-Library Modern Responsive Stylesheet */
/* Mobile-First Approach with iOS Optimizations */

/* ========================================
   CSS VARIABLES & THEME SYSTEM
   ======================================== */
:root {
    /* Primary Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-900: #312e81;
    
    /* Secondary Colors */
    --secondary-color: #64748b;
    --secondary-dark: #475569;
    --secondary-light: #94a3b8;
    
    /* Status Colors */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --danger-color: #ef4444;
    --danger-light: #fee2e2;
    --info-color: #06b6d4;
    --info-light: #cffafe;
    
    /* Neutral Colors */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Background Colors */
    --body-bg: #ffffff;
    --surface-bg: #ffffff;
    --surface-secondary: #f8fafc;
    --surface-tertiary: #f1f5f9;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-dark: #cbd5e1;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-xs: 0.125rem;
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 3rem;
    --space-4xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
    
    /* Breakpoints (for reference) */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;
}

/* ========================================
   DARK MODE THEME SYSTEM
   ======================================== */

/* Light mode (default) */
:root {
    --theme-name: 'light';
    
    /* Ensure light mode variables are properly set */
    --body-bg: #ffffff;
    --surface-bg: #ffffff;
    --surface-secondary: #f8fafc;
    --surface-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-dark: #cbd5e1;
    --navbar-bg: #ffffff;
    --navbar-border: #e2e8f0;
    --navbar-text: #0f172a;
    --navbar-link: #475569;
    --navbar-link-hover: #0f172a;
    --hero-bg: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    --hero-text: #ffffff;
    --hero-accent: #fbbf24;
    --footer-bg: #1e293b;
    --footer-text: #f8fafc;
    --footer-link: #94a3b8;
    --footer-link-hover: #cbd5e1;
}

/* Dark mode */
[data-theme="dark"] {
    --theme-name: 'dark';
    
    /* Background Colors */
    --body-bg: #0f172a;
    --surface-bg: #1e293b;
    --surface-secondary: #334155;
    --surface-tertiary: #475569;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-muted: #64748b;
    --text-inverse: #c3c9d5;
    
    /* Border Colors */
    --border-color: #334155;
    --border-light: #475569;
    --border-dark: #1e293b;
    
    /* Card Colors */
    --card-bg: #1e293b;
    --card-border: #334155;
    
    /* Input Colors */
    --input-bg: #334155;
    --input-border: #475569;
    --input-text: #f8fafc;
    --input-placeholder: #94a3b8;
    
    /* Button Colors */
    --btn-secondary-bg: #475569;
    --btn-secondary-border: #64748b;
    --btn-light-bg: #334155;
    --btn-light-border: #475569;
    --btn-light-text: #f8fafc;
    
    /* Navbar Colors */
    --navbar-bg: #1e293b;
    --navbar-border: #334155;
    --navbar-text: #f8fafc;
    --navbar-link: #cbd5e1;
    --navbar-link-hover: #f8fafc;
    
    /* Footer Colors */
    --footer-bg: #0f172a;
    --footer-text: #f8fafc;
    --footer-link: #94a3b8;
    --footer-link-hover: #cbd5e1;
    
    /* Hero Section */
    --hero-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --hero-text: #f8fafc;
    --hero-accent: #fbbf24;
    
    /* Shadow Colors */
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.2), 0 1px 2px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
}

/* System preference detection */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --body-bg: #0f172a;
        --surface-bg: #1e293b;
        --surface-secondary: #334155;
        --surface-tertiary: #475569;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        --text-muted: #64748b;
        --border-color: #334155;
        --border-light: #475569;
        --border-dark: #1e293b;
    }
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--body-bg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* iOS specific optimizations */
@supports (-webkit-touch-callout: none) {
    body {
        -webkit-overflow-scrolling: touch;
    }
    
    input, textarea, select {
        -webkit-appearance: none;
        appearance: none;
        border-radius: var(--radius-md);
    }
    
    button {
        -webkit-appearance: none;
        appearance: none;
        border-radius: var(--radius-md);
    }
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

.display-1 { font-size: var(--text-6xl); font-weight: 700; }
.display-2 { font-size: var(--text-5xl); font-weight: 700; }
.display-3 { font-size: var(--text-4xl); font-weight: 700; }
.display-4 { font-size: var(--text-3xl); font-weight: 700; }

.lead {
    font-size: var(--text-lg);
    font-weight: 400;
    line-height: var(--leading-relaxed);
    /*color: var(--text-secondary);*/
    color:#cfd4db;
}

.text-muted { color: var(--text-muted) !important; }
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-info { color: var(--info-color) !important; }

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

a:hover {
    color: #0a58ca;
    text-decoration: underline;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 0.5rem 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0a58ca;
    border-color: #0a58ca;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

/* Cards */
.card {
    background-color: var(--card-bg, var(--surface-bg));
    border: 1px solid var(--card-border, var(--border-color));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.card-header {
    background-color: var(--surface-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
}

/* Forms */
.form-control {
    border-radius: var(--radius-md);
    border: 1px solid var(--input-border, var(--border-color));
    background-color: var(--input-bg, var(--surface-bg));
    color: var(--input-text, var(--text-primary));
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background-color: var(--input-bg, var(--surface-bg));
    color: var(--input-text, var(--text-primary));
}

.form-control::placeholder {
    color: var(--input-placeholder, var(--text-muted));
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
}

.alert-dismissible .btn-close {
    padding: 0.75rem 1rem;
}

/* Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background-color: var(--navbar-bg, var(--surface-bg)) !important;
    z-index: 1060;
    position: relative;
    color: var(--navbar-text, var(--text-primary));
    border-bottom: 1px solid var(--navbar-border, var(--border-color));
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.navbar-brand:hover {
    color: var(--primary-color);
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.nav-link:hover {
    background-color: var(--surface-secondary);
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color) !important;
    background-color: rgba(99, 102, 241, 0.1);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
    z-index: 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
    pointer-events: none;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    color: white;
}

.hero-section .lead {
    color: rgba(255, 255, 255, 0.9);
}

.hero-image {
    opacity: 0.8;
}

.min-vh-75 {
    min-height: 75vh;
}

/* Features Section */
.features-section {
    background-color: var(--light-color);
}

.feature-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

/* Stats Section */
.stat-item h3 {
    color: var(--primary-color);
    font-weight: 700;
}

/* Recent Notes */
.note-card {
    height: 100%;
    transition: var(--transition);
}

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

.note-thumbnail {
    height: 200px;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.note-meta {
    font-size: 0.875rem;
    color: var(--secondary-color);
}

/* Search */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1050;
    padding: 2rem 0;
    transform: translateY(-100%);
    transition: var(--transition);
}

.search-overlay.show {
    transform: translateY(0);
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

/* Avatar */
.avatar-sm {
    width: 32px;
    height: 32px;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--light-color);
    color: var(--secondary-color);
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Flash Messages */
.flash-messages-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1060;
    max-width: 400px;
}

/* Footer */
.footer {
    margin-top: auto;
}

.footer h5, .footer h6 {
    color: white;
    font-weight: 600;
}

.footer a:hover {
    color: white !important;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--primary-color) !important;
    transform: translateY(-2px);
}

/* Back to top button */
#backToTop {
    z-index: 1000;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Utility Classes */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--info-color) !important; }
.text-light { color: var(--light-color) !important; }
.text-dark { color: var(--dark-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-info { background-color: var(--info-color) !important; }
.bg-light { background-color: var(--light-color) !important; }
.bg-dark { background-color: var(--dark-color) !important; }

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .min-vh-75 {
        min-height: 50vh;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .display-5 {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .flash-messages-container {
        left: 20px;
        right: 20px;
        max-width: none;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
    }
    
    .feature-card {
        margin-bottom: 1rem;
    }
    
    .navbar-nav {
        text-align: center;
    }
    
    .search-overlay {
        padding: 1rem 0;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .btn,
    .search-overlay,
    #backToTop {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
}

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

.sr-only-focusable:focus {
    position: static !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
}

/* Focus styles for keyboard navigation */
.btn:focus,
.form-control:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-color: #000000;
        --body-bg: #ffffff;
    }
    
    .card {
        border: 2px solid var(--border-color);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .card:hover,
    .feature-card:hover,
    .note-card:hover {
        transform: none;
    }
}

/* Collection Cards */
.collection-card {
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.collection-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.collection-card .card-title {
    color: var(--primary-color);
    font-weight: 600;
}

.collection-card .badge {
    font-size: 0.75rem;
}

.collection-card .btn {
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
}

/* Popular Collections Section */
.popular-collections {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.popular-collections .card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

/* ========================================
   COMPREHENSIVE RESPONSIVE DESIGN
   ======================================== */

/* Large Tablets and Small Desktops (992px - 1199px) */
@media (max-width: 1199.98px) {
    .container {
        max-width: 960px;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .feature-card {
        margin-bottom: 1.5rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-columns {
        column-count: 2;
    }
}

/* Tablets (768px - 991px) */
@media (max-width: 991.98px) {
    .container {
        max-width: 720px;
    }
    
    /* Navigation */
    .navbar-nav {
        text-align: center;
        margin-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .navbar-nav .nav-link:last-child {
        border-bottom: none;
    }
    
    .dropdown-menu {
        position: static !important;
        transform: none !important;
        border: none;
        box-shadow: none;
        background: var(--light-color);
        margin-top: 0.5rem;
    }
    
    /* Fix dropdown positioning for desktop */
    @media (min-width: 992px) {
        .dropdown-menu {
            position: absolute !important;
            transform: translateY(0) !important;
            border: 1px solid rgba(0,0,0,0.15) !important;
            box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.175) !important;
            background: white !important;
            margin-top: 0 !important;
        }
        
        [data-theme="dark"] .dropdown-menu {
            background: var(--dark-color) !important;
            border-color: rgba(255,255,255,0.15) !important;
        }
    }
    
    /* Hero Section */
    .hero-section {
        padding: 3rem 0;
        text-align: center;
    }
    
    .hero-section h1 {
        font-size: 2.25rem;
        margin-bottom: 1rem;
    }
    
    .hero-section .lead {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .display-4 {
        font-size: 2.25rem;
    }
    
    /* Cards and Grid */
    .card-columns {
        column-count: 1;
    }
    
    .row.g-4 {
        --bs-gutter-x: 1.5rem;
        --bs-gutter-y: 1.5rem;
    }
    
    /* Forms */
    .form-control,
    .form-select {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    /* Buttons */
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .btn-sm {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    /* Modals */
    .modal-dialog {
        margin: 1rem;
    }
    
    .modal-lg {
        max-width: calc(100% - 2rem);
    }
    
    /* Tables */
    .table-responsive {
        border: none;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    /* Pagination */
    .pagination {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .pagination .page-item {
        margin: 0.125rem;
    }
    
    /* Collections */
    .collection-card .card-body {
        padding: 1rem;
    }
    
    .collection-card .btn {
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
    }
    
    /* Admin Dashboard */
    .admin-stats .col-md-3 {
        margin-bottom: 1rem;
    }
    
    /* User Profile */
    .profile-avatar {
        width: 80px;
        height: 80px;
    }
}

/* Mobile Landscape (576px - 767px) */
@media (max-width: 767.98px) {
    .container {
        max-width: 540px;
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    /* Typography */
    h1, .h1 {
        font-size: 1.75rem;
    }
    
    h2, .h2 {
        font-size: 1.5rem;
    }
    
    h3, .h3 {
        font-size: 1.25rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1rem;
    }
    
    /* Hero Section */
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .hero-section .btn {
        display: block;
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .hero-section .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Navigation */
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .navbar-toggler {
        padding: 0.25rem 0.5rem;
        font-size: 1rem;
    }
    
    /* Search */
    .search-form {
        margin-top: 1rem;
    }
    
    .search-form .input-group {
        flex-direction: column;
    }
    
    .search-form .input-group .form-control {
        border-radius: 0.375rem 0.375rem 0 0;
        margin-bottom: 0.5rem;
    }
    
    .search-form .input-group .btn {
        border-radius: 0 0 0.375rem 0.375rem;
    }
    
    /* Cards */
    .card {
        margin-bottom: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card-title {
        font-size: 1.1rem;
    }
    
    /* Buttons */
    .btn-group-vertical .btn {
        margin-bottom: 0.25rem;
    }
    
    .btn-group-vertical .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Forms */
    .form-row .col,
    .row .col {
        margin-bottom: 1rem;
    }
    
    .form-row .col:last-child,
    .row .col:last-child {
        margin-bottom: 0;
    }
    
    /* Modals */
    .modal-header {
        padding: 1rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        padding: 1rem;
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .modal-footer .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Tables */
    .table {
        font-size: 0.8rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem 0.25rem;
    }
    
    /* Pagination */
    .pagination {
        font-size: 0.875rem;
    }
    
    .pagination .page-link {
        padding: 0.5rem 0.75rem;
    }
    
    /* Collections */
    .collection-card .card-body {
        padding: 0.75rem;
    }
    
    .collection-card .card-title {
        font-size: 1rem;
    }
    
    .collection-card .btn {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }
    
    /* Admin */
    .admin-stats .card {
        text-align: center;
    }
    
    .admin-stats .card-body {
        padding: 1rem 0.5rem;
    }
    
    /* User Dashboard */
    .user-stats .row {
        margin: 0;
    }
    
    .user-stats .col {
        padding: 0.5rem;
    }
    
    /* File Upload */
    .file-upload-area {
        padding: 2rem 1rem;
    }
    
    .file-upload-area h5 {
        font-size: 1.1rem;
    }
    
    /* Comments */
    .comment-item {
        padding: 0.75rem;
    }
    
    .comment-meta {
        font-size: 0.8rem;
    }
}

/* Mobile Portrait (up to 575px) */
@media (max-width: 575.98px) {
    .container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    
    /* Typography */
    h1, .h1 {
        font-size: 1.5rem;
    }
    
    h2, .h2 {
        font-size: 1.25rem;
    }
    
    h3, .h3 {
        font-size: 1.1rem;
    }
    
    .display-4 {
        font-size: 1.75rem;
    }
    
    /* Hero Section */
    .hero-section {
        padding: 1.5rem 0;
    }
    
    .hero-section h1 {
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .hero-section .lead {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }
    
    /* Navigation */
    .navbar {
        padding: 0.5rem 0;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    /* Cards */
    .card-body {
        padding: 0.75rem;
    }
    
    .card-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
    
    /* Buttons */
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .btn-sm {
        padding: 0.375rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    /* Forms */
    .form-control,
    .form-select {
        font-size: 16px;
        padding: 0.75rem;
    }
    
    .form-label {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
    
    /* Modals */
    .modal-dialog {
        margin: 0.5rem;
    }
    
    .modal-content {
        border-radius: 0.5rem;
    }
    
    .modal-header {
        padding: 0.75rem;
    }
    
    .modal-body {
        padding: 0.75rem;
    }
    
    .modal-footer {
        padding: 0.75rem;
    }
    
    /* Tables */
    .table-responsive {
        font-size: 0.75rem;
    }
    
    .table th,
    .table td {
        padding: 0.375rem 0.25rem;
    }
    
    /* Pagination */
    .pagination {
        font-size: 0.8rem;
    }
    
    .pagination .page-link {
        padding: 0.375rem 0.5rem;
    }
    
    /* Collections */
    .collection-card .card-body {
        padding: 0.5rem;
    }
    
    .collection-card .card-title {
        font-size: 0.9rem;
    }
    
    .collection-card .btn {
        font-size: 0.7rem;
        padding: 0.25rem 0.375rem;
    }
    
    /* Admin */
    .admin-stats .card-body {
        padding: 0.75rem 0.25rem;
    }
    
    .admin-stats h5 {
        font-size: 1rem;
    }
    
    .admin-stats .display-4 {
        font-size: 1.5rem;
    }
    
    /* User Profile */
    .profile-avatar {
        width: 60px;
        height: 60px;
    }
    
    .profile-info h4 {
        font-size: 1.1rem;
    }
    
    /* File Upload */
    .file-upload-area {
        padding: 1.5rem 0.75rem;
    }
    
    .file-upload-area h5 {
        font-size: 1rem;
    }
    
    /* Comments */
    .comment-item {
        padding: 0.5rem;
    }
    
    .comment-meta {
        font-size: 0.75rem;
    }
    
    /* Tabs */
    .nav-tabs .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    /* Badges */
    .badge {
        font-size: 0.7rem;
    }
    
    /* Alerts */
    .alert {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

/* Extra Small Devices (up to 375px) */
@media (max-width: 375px) {
    .container {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
    
    /* Typography */
    h1, .h1 {
        font-size: 1.25rem;
    }
    
    h2, .h2 {
        font-size: 1.1rem;
    }
    
    .display-4 {
        font-size: 1.5rem;
    }
    
    /* Hero Section */
    .hero-section h1 {
        font-size: 1.25rem;
    }
    
    .hero-section .lead {
        font-size: 0.9rem;
    }
    
    /* Navigation */
    .navbar-brand {
        font-size: 0.9rem;
    }
    
    /* Cards */
    .card-body {
        padding: 0.5rem;
    }
    
    /* Buttons */
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    /* Forms */
    .form-control,
    .form-select {
        padding: 0.625rem;
    }
    
    /* Modals */
    .modal-dialog {
        margin: 0.25rem;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 0.5rem;
    }
    
    /* Tables */
    .table th,
    .table td {
        padding: 0.25rem 0.125rem;
    }
    
    /* Pagination */
    .pagination .page-link {
        padding: 0.25rem 0.375rem;
    }
}

/* Landscape Orientation Adjustments */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        padding: 1rem 0;
    }
    
    .hero-section h1 {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }
    
    .hero-section .lead {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .modal-dialog {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .navbar-brand i,
    .btn i,
    .card i {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px; /* iOS recommended touch target size */
    }
    
    .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    .form-control,
    .form-select {
        min-height: 44px;
    }
    
    .pagination .page-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Remove hover effects on touch devices */
    .card:hover,
    .btn:hover,
    .nav-link:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
}

/* Additional Mobile Optimizations */
@media (max-width: 768px) {
    /* Improve touch targets */
    .dropdown-toggle::after {
        margin-left: 0.5em;
    }
    
    /* Better spacing for mobile */
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    /* Improve modal experience on mobile */
    .modal-dialog {
        margin: 0.5rem;
        max-height: calc(100vh - 1rem);
    }
    
    .modal-content {
        max-height: calc(100vh - 1rem);
        overflow-y: auto;
    }
    
    /* Better table experience on mobile */
    .table-responsive {
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius);
    }
    
    /* Improve card spacing */
    .card {
        margin-bottom: 1rem;
    }
    
    /* Better button groups on mobile */
    .btn-group {
        display: flex;
        flex-wrap: wrap;
    }
    
    .btn-group .btn {
        flex: 1;
        min-width: 0;
    }
    
    /* Improve form spacing */
    .form-floating > label {
        padding: 1rem 0.75rem;
    }
    
    /* Better alert spacing */
    .alert {
        margin-bottom: 1rem;
    }
    
    /* Improve badge spacing */
    .badge {
        margin: 0.125rem;
    }
    
    /* Better list group on mobile */
    .list-group-item {
        padding: 0.75rem 1rem;
    }
    
    /* Improve dropdown menus on mobile */
    .dropdown-menu {
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
    }
    
    /* Better progress bars on mobile */
    .progress {
        height: 1rem;
    }
    
    /* Improve tooltip positioning on mobile */
    .tooltip {
        font-size: 0.875rem;
    }
}

/* Mobile-specific utility classes */
@media (max-width: 768px) {
    .mobile-hidden {
        display: none !important;
    }
    
    .mobile-full-width {
        width: 100% !important;
    }
    
    .mobile-center {
        text-align: center !important;
    }
    
    .mobile-stack {
        flex-direction: column !important;
    }
    
    .mobile-no-margin {
        margin: 0 !important;
    }
    
    .mobile-no-padding {
        padding: 0 !important;
    }
}

/* Mobile-specific interactive states */
.touch-device .btn-touch-active {
    transform: scale(0.98);
    opacity: 0.8;
}

.touch-device .card-touch-active {
    transform: scale(0.99);
    box-shadow: var(--shadow-lg);
}

.mobile-view .modal-mobile {
    margin: 0.25rem;
    max-width: calc(100% - 0.5rem);
}

.mobile-view .modal-mobile-open {
    overflow: hidden;
}

.mobile-view .file-upload-mobile-active {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.02);
}

.mobile-view .table-scrollable {
    position: relative;
}

.mobile-view .table-scrollable::after {
    content: '← Swipe to scroll →';
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    pointer-events: none;
    opacity: 0.8;
}

.mobile-view .pagination-loading {
    opacity: 0.6;
    pointer-events: none;
}

.mobile-view .search-mobile-active {
    transform: scale(1.02);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.mobile-view .dropdown-mobile-open .dropdown-menu {
    position: static !important;
    transform: none !important;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    margin-top: 0.5rem;
}

.mobile-view .img-loaded-mobile {
    opacity: 1;
    transition: opacity 0.3s ease;
}

.mobile-view .loading-mobile {
    position: relative;
    pointer-events: none;
}

.mobile-view .loading-mobile::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.mobile-view .loading-mobile::before {
    content: 'Loading...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 11;
}

/* ========================================
   MOBILE SEARCH OVERLAY
   ======================================== */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.search-overlay.show {
    display: flex;
    opacity: 1;
}

.search-form {
    width: 100%;
    max-width: 600px;
    animation: slideInUp 0.3s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Brand styling */
.brand-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    color: white;
    font-size: var(--text-lg);
}

.brand-text {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
}

/* ========================================
   THEME TOGGLE COMPONENT
   ======================================== */
.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background-color: var(--surface-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.theme-toggle:hover {
    background-color: var(--surface-secondary);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.theme-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.theme-toggle i {
    font-size: var(--text-lg);
    transition: all var(--transition-fast);
}

.theme-toggle[data-theme="dark"] i.fa-sun {
    display: none;
}

.theme-toggle[data-theme="light"] i.fa-moon {
    display: none;
}

.theme-toggle[data-theme="dark"] i.fa-moon {
    display: block;
}

.theme-toggle[data-theme="light"] i.fa-sun {
    display: block;
}

/* Theme transition animation */
* {
    transition: background-color 0.3s ease, 
                border-color 0.3s ease, 
                color 0.3s ease,
                box-shadow 0.3s ease;
}

/* Dark mode specific adjustments */
[data-theme="dark"] .navbar {
    background-color: var(--navbar-bg) !important;
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .navbar .nav-link {
    color: var(--navbar-link);
}

[data-theme="dark"] .navbar .nav-link:hover,
[data-theme="dark"] .navbar .nav-link.active {
    color: var(--navbar-link-hover);
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--surface-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

[data-theme="dark"] .btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

[data-theme="dark"] .btn-light {
    background-color: var(--btn-light-bg);
    border-color: var(--btn-light-border);
    color: var(--btn-light-text);
}

[data-theme="dark"] .btn-light:hover {
    background-color: var(--btn-secondary-bg);
    border-color: var(--btn-secondary-border);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-secondary {
    background-color: var(--btn-secondary-bg);
    border-color: var(--btn-secondary-border);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

[data-theme="dark"] .hero-section {
    background: var(--hero-bg);
    color: var(--hero-text);
}

[data-theme="dark"] .hero-section .text-warning {
    color: var(--hero-accent) !important;
}

[data-theme="dark"] .footer {
    background: var(--footer-bg);
    color: var(--footer-text);
}

[data-theme="dark"] .footer .list-unstyled a {
    color: var(--footer-link);
}

[data-theme="dark"] .footer .list-unstyled a:hover {
    color: var(--footer-link-hover);
}

/* Additional dark mode component styles */
[data-theme="dark"] .alert {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .alert-primary {
    background-color: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
}

[data-theme="dark"] .alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--success-color);
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger-color);
}

[data-theme="dark"] .alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--warning-color);
}

[data-theme="dark"] .alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--info-color);
}

[data-theme="dark"] .pagination .page-link {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .pagination .page-link:hover {
    background-color: var(--surface-secondary);
    border-color: var(--border-dark);
    color: var(--text-primary);
}

[data-theme="dark"] .pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

[data-theme="dark"] .pagination .page-item.disabled .page-link {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-muted);
}

[data-theme="dark"] .badge.bg-light {
    background-color: var(--surface-secondary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .bg-light {
    background-color: var(--surface-secondary) !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--surface-bg) !important;
}

[data-theme="dark"] .border {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .border-light {
    border-color: var(--border-light) !important;
}

[data-theme="dark"] .border-dark {
    border-color: var(--border-dark) !important;
}

/* Dark mode for specific components */
[data-theme="dark"] .feature-card {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .feature-card:hover {
    background-color: var(--surface-secondary);
    transform: translateY(-2px);
}

[data-theme="dark"] .note-card {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .note-card:hover {
    background-color: var(--surface-secondary);
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .collection-card {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .collection-card:hover {
    background-color: var(--surface-secondary);
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .filter-sidebar {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .filter-section {
    border-color: var(--border-color);
}

[data-theme="dark"] .filter-title {
    color: var(--text-primary);
}

[data-theme="dark"] .quick-filter-btn {
    background-color: var(--surface-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .quick-filter-btn:hover,
[data-theme="dark"] .quick-filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

[data-theme="dark"] .filter-tag {
    background-color: var(--primary-color);
    color: var(--text-inverse);
}

[data-theme="dark"] .filter-tag .remove-tag {
    color: var(--text-inverse);
}

[data-theme="dark"] .filter-tag .remove-tag:hover {
    color: var(--text-inverse);
    background-color: rgba(255, 255, 255, 0.2);
}

/* Dark mode for modals */
[data-theme="dark"] .modal-content {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .modal-title {
    color: var(--text-primary);
}

/* Dark mode for tables */
[data-theme="dark"] .table {
    color: var(--text-primary);
}

[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > td,
[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > th {
    background-color: var(--surface-secondary);
}

[data-theme="dark"] .table-hover > tbody > tr:hover > td,
[data-theme="dark"] .table-hover > tbody > tr:hover > th {
    background-color: var(--surface-tertiary);
}

/* Dark mode for code blocks */
[data-theme="dark"] code {
    background-color: var(--surface-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] pre {
    background-color: var(--surface-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

/* Dark mode for blockquotes */
[data-theme="dark"] blockquote {
    border-left-color: var(--primary-color);
    color: var(--text-secondary);
}

/* Dark mode for progress bars */
[data-theme="dark"] .progress {
    background-color: var(--surface-secondary);
}

[data-theme="dark"] .progress-bar {
    background-color: var(--primary-color);
}

/* Dark mode for list groups */
[data-theme="dark"] .list-group-item {
    background-color: var(--surface-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .list-group-item:hover {
    background-color: var(--surface-secondary);
}

[data-theme="dark"] .list-group-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

/* Dark mode for breadcrumbs */
[data-theme="dark"] .breadcrumb {
    background-color: var(--surface-secondary);
}

[data-theme="dark"] .breadcrumb-item a {
    color: var(--text-primary);
}

[data-theme="dark"] .breadcrumb-item.active {
    color: var(--text-muted);
}

/* Dark mode for tooltips */
[data-theme="dark"] .tooltip .tooltip-inner {
    background-color: var(--surface-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .tooltip.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .tooltip.bs-tooltip-bottom .tooltip-arrow::before {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .tooltip.bs-tooltip-start .tooltip-arrow::before {
    border-left-color: var(--border-color);
}

[data-theme="dark"] .tooltip.bs-tooltip-end .tooltip-arrow::before {
    border-right-color: var(--border-color);
}

/* ========================================
   SIMPLE DARK MODE FIXES
   ======================================== */

/* Ensure dark mode works with basic elements */
[data-theme="dark"] {
    background-color: #0f172a !important;
    color: #f8fafc !important;
}

[data-theme="dark"] body {
    background-color: #0f172a !important;
    color: #f8fafc !important;
}

/* Force dark mode on all major elements */
[data-theme="dark"] .navbar {
    background-color: #1e293b !important;
    border-bottom-color: #334155 !important;
}

[data-theme="dark"] .navbar-brand,
[data-theme="dark"] .nav-link {
    color: #f8fafc !important;
}

[data-theme="dark"] .card {
    background-color: #1e293b !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .form-control {
    background-color: #334155 !important;
    border-color: #475569 !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .btn-outline-primary {
    color: #6366f1 !important;
    border-color: #6366f1 !important;
}

[data-theme="dark"] .btn-outline-primary:hover {
    background-color: #6366f1 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .navbar {
    background-color: #2d2d2d !important;
    border-bottom-color: #404040 !important;
}

[data-theme="dark"] .navbar-brand,
[data-theme="dark"] .nav-link {
    color: #ffffff !important;
}

[data-theme="dark"] .nav-link:hover {
    color: #6366f1 !important;
}

[data-theme="dark"] .card {
    background-color: #2d2d2d !important;
    border-color: #404040 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .card-header {
    background-color: #3d3d3d !important;
    border-bottom-color: #404040 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .form-control {
    background-color: #3d3d3d !important;
    border-color: #404040 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .form-control:focus {
    background-color: #3d3d3d !important;
    border-color: #6366f1 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .form-control::placeholder {
    color: #999999 !important;
}

[data-theme="dark"] .btn-outline-primary {
    color: #6366f1 !important;
    border-color: #6366f1 !important;
}

[data-theme="dark"] .btn-outline-primary:hover {
    background-color: #6366f1 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .btn-light {
    background-color: #3d3d3d !important;
    border-color: #404040 !important;
    color: #2f2a2a !important;
}

[data-theme="dark"] .btn-light:hover {
    background-color: #4d4d4d !important;
    color: #2f2a22 !important;
}

[data-theme="dark"] .dropdown-menu {
    background-color: #2d2d2d !important;
    border-color: #404040 !important;
}

[data-theme="dark"] .dropdown-item {
    color: #ffffff !important;
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: #3d3d3d !important;
    color: #ffffff !important;
}

[data-theme="dark"] .text-muted {
    color: #999999 !important;
}

[data-theme="dark"] .bg-light {
    background-color: #3d3d3d !important;
}

[data-theme="dark"] .bg-white {
    background-color: #2d2d2d !important;
}

[data-theme="dark"] .border {
    border-color: #404040 !important;
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%) !important;
    color: #ffffff !important;
}

[data-theme="dark"] .footer {
    background-color: #1a1a1a !important;
    color: #ffffff !important;
}

[data-theme="dark"] .footer .list-unstyled a {
    color: #999999 !important;
}

[data-theme="dark"] .footer .list-unstyled a:hover {
    color: #ffffff !important;
}
[data-theme="dark"] .guidelines {
    background: #2c3031;
}
[data-theme="dark"] #editProfileBtn {
   color:#f3e8e8 !important;
}

#toggleExtendedInfo{
    color:white !important;
}

/* ========================================
   THEME TOGGLE FIXES (DESKTOP & MOBILE)
   ======================================== */

/* Desktop theme toggle styles */
.theme-toggle {
    position: relative;
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
    min-height: 2.5rem;
    border-radius: 50%;
    background-color: var(--surface-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.theme-toggle:hover,
.theme-toggle:focus {
    background-color: var(--surface-secondary);
    border-color: var(--primary-color);
    transform: scale(1.05);
    outline: none;
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle i {
    position: absolute;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    opacity: 0;
    display: none;
}

/* Default state - show sun icon (light mode) */
.theme-toggle i.fa-sun {
    display: block;
    opacity: 1;
}

.theme-toggle i.fa-moon {
    display: none;
    opacity: 0;
}

/* Dark theme state */
.theme-toggle[data-theme="dark"] i.fa-sun {
    display: none !important;
    opacity: 0 !important;
}

.theme-toggle[data-theme="dark"] i.fa-moon {
    display: block !important;
    opacity: 1 !important;
}

/* Light theme state */
.theme-toggle[data-theme="light"] i.fa-sun {
    display: block !important;
    opacity: 1 !important;
}

.theme-toggle[data-theme="light"] i.fa-moon {
    display: none !important;
    opacity: 0 !important;
}
[data-theme="light"] .forlight-theme-header *{
    color:black !important;
}
[data-theme="dark"] .forlight-theme-header  .coll-custom{
    color:white !important;
}

[data-theme="light"] .add-notes-card {
    background: #724edf;

}

.forlight-theme-header{
    border: 2px solid #bdbdbd;
    padding: 5px;
    border-radius: 8px;
    
}
/* ========================================
   MOBILE THEME TOGGLE FIXES
   ======================================== */

/* Mobile theme toggle specific styles */
@media (max-width: 991.98px) {
    .theme-toggle {
        z-index: 1050;
    }
    
    /* Mobile navbar theme toggle positioning */
    .navbar .theme-toggle {
        margin-right: 0.5rem;
        order: 2;
    }
    
    /* Ensure mobile theme toggle is always visible and clickable */
    #mobileThemeToggle {
        position: relative;
        z-index: 1051;
        pointer-events: auto;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    #mobileThemeToggle:active {
        transform: scale(0.9);
        background-color: var(--primary-color);
        color: white;
    }
    
    /* Mobile search button positioning */
    .navbar #mobileSearchBtn {
        order: 1;
        margin-right: 0.5rem;
    }
    
    /* Mobile controls container - only show on mobile */
    .navbar .d-flex.align-items-center {
        position: relative;
        z-index: 1051;
        flex-shrink: 0;
        order: 2;
    }
    
    /* Hide mobile controls on desktop */
    @media (min-width: 992px) {
        .navbar .d-flex.align-items-center {
            display: none !important;
        }
    }
    
    /* Ensure navbar brand stays in place */
    .navbar-brand {
        flex-shrink: 0;
        order: 1;
    }
    
    /* Ensure navbar collapse doesn't affect positioning */
    .navbar-collapse {
        order: 3;
        flex-shrink: 0;
    }
    
    /* Mobile navbar toggler positioning */
    .navbar .navbar-toggler {
        order: 3;
        position: relative;
        z-index: 1052;
    }
}

/* Mobile-specific dark mode fixes */
@media (max-width: 991.98px) {
    [data-theme="dark"] .navbar {
        background-color: var(--navbar-bg, #2d2d2d) !important;
        border-bottom-color: var(--navbar-border, #404040) !important;
    }
    
    [data-theme="dark"] .navbar-brand {
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar .nav-link {
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar .nav-link:hover {
        color: var(--primary-color) !important;
        background-color: var(--surface-secondary) !important;
    }
    
    [data-theme="dark"] .navbar .dropdown-menu {
        background-color: var(--surface-bg) !important;
        border-color: var(--border-color) !important;
    }
    
    [data-theme="dark"] .navbar .dropdown-item {
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar .dropdown-item:hover {
        background-color: var(--surface-secondary) !important;
        color: var(--text-primary) !important;
    }
    
    /* Mobile search overlay dark mode */
    [data-theme="dark"] .search-overlay {
        background-color: rgba(0, 0, 0, 0.9) !important;
    }
    
    [data-theme="dark"] .search-form .form-control {
        background-color: var(--surface-bg) !important;
        border-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .search-form .form-control::placeholder {
        color: var(--text-muted) !important;
    }
    
    [data-theme="dark"] .search-form .btn {
        background-color: var(--primary-color) !important;
        border-color: var(--primary-color) !important;
        color: var(--text-inverse) !important;
    }
    
    /* Mobile cards and content dark mode */
    [data-theme="dark"] .card {
        background-color: var(--surface-bg) !important;
        border-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .card-header {
        background-color: var(--surface-secondary) !important;
        border-bottom-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .btn-outline-primary {
        color: var(--primary-color) !important;
        border-color: var(--primary-color) !important;
    }
    
    [data-theme="dark"] .btn-outline-primary:hover {
        background-color: var(--primary-color) !important;
        color: var(--text-inverse) !important;
    }
    
    [data-theme="dark"] .btn-primary {
        background-color: var(--primary-color) !important;
        border-color: var(--primary-color) !important;
        color: var(--text-inverse) !important;
    }
    
    [data-theme="dark"] .btn-primary:hover {
        background-color: var(--primary-dark) !important;
        border-color: var(--primary-dark) !important;
    }
    
    /* Mobile form elements dark mode */
    [data-theme="dark"] .form-control {
        background-color: var(--surface-bg) !important;
        border-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .form-control:focus {
        background-color: var(--surface-bg) !important;
        border-color: var(--primary-color) !important;
        color: var(--text-primary) !important;
        box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25) !important;
    }
    
    [data-theme="dark"] .form-control::placeholder {
        color: var(--text-muted) !important;
    }
    
    /* Mobile text colors dark mode */
    [data-theme="dark"] .text-muted {
        color: var(--text-muted) !important;
    }
    
    [data-theme="dark"] .text-primary {
        color: var(--primary-color) !important;
    }
    
    [data-theme="dark"] .text-secondary {
        color: var(--text-secondary) !important;
    }
    
    /* Mobile background colors dark mode */
    [data-theme="dark"] .bg-light {
        background-color: var(--surface-secondary) !important;
    }
    
    [data-theme="dark"] .bg-white {
        background-color: var(--surface-bg) !important;
    }
    
    /* Mobile border colors dark mode */
    [data-theme="dark"] .border {
        border-color: var(--border-color) !important;
    }
    
    [data-theme="dark"] .border-top {
        border-top-color: var(--border-color) !important;
    }
    
    [data-theme="dark"] .border-bottom {
        border-bottom-color: var(--border-color) !important;
    }
    
    /* Mobile touch interactions */
    .touch-active {
        transform: scale(0.95) !important;
        transition: transform 0.1s ease !important;
    }
    
    .card-touch {
        transform: scale(0.98) !important;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2) !important;
        transition: all 0.1s ease !important;
    }
    
    /* Mobile search active state */
    .search-mobile-active {
        background-color: var(--surface-secondary) !important;
        border-color: var(--primary-color) !important;
    }
    
    /* Mobile dropdown open state */
    .dropdown-mobile-open .dropdown-menu {
        display: block !important;
        position: static !important;
        transform: none !important;
        box-shadow: none !important;
        border: 1px solid var(--border-color) !important;
        margin-top: 0.5rem !important;
    }
    
    /* Mobile view class */
    .mobile-view .navbar-nav .nav-link {
        padding: 0.75rem 1rem !important;
        border-bottom: 1px solid var(--border-color) !important;
    }
    
    .mobile-view .navbar-nav .nav-link:last-child {
        border-bottom: none !important;
    }
    
    /* Mobile theme toggle positioning fix */
    .mobile-view .navbar .theme-toggle {
        order: 2 !important;
        margin-right: 0.5rem !important;
    }
    
    .mobile-view .navbar #mobileSearchBtn {
        order: 1 !important;
        margin-right: 0.5rem !important;
    }
    
    .mobile-view .navbar .navbar-toggler {
        order: 3 !important;
    }
}

/* ========================================
   MOBILE MENU FIXES
   ======================================== */

/* Hide navbar toggler on desktop */
@media (min-width: 992px) {
    .navbar-toggler {
        display: none !important;
    }
}

/* Mobile navbar toggler styling */
@media (max-width: 991.98px) {
    .navbar-toggler {
        border: 1px solid var(--border-color) !important;
        border-radius: var(--radius-md) !important;
        padding: 0.5rem !important;
        background-color: var(--surface-bg) !important;
        color: var(--text-primary) !important;
        transition: all var(--transition-fast) !important;
        min-width: 44px !important;
        min-height: 44px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        position: relative !important;
        z-index: 1052 !important;
        flex-shrink: 0 !important;
    }
    
    .navbar-toggler:hover,
    .navbar-toggler:focus {
        background-color: var(--surface-secondary) !important;
        border-color: var(--primary-color) !important;
        color: var(--primary-color) !important;
        outline: none !important;
        box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25) !important;
    }
    
    .navbar-toggler:active {
        transform: scale(0.95) !important;
    }
    
    /* Improved hamburger icon */
    .navbar-toggler-icon {
        background-image: none !important;
        width: 1.5rem !important;
        height: 1.5rem !important;
        position: relative !important;
        display: block !important;
    }
    
    /* Create the hamburger lines */
    .navbar-toggler-icon::before,
    .navbar-toggler-icon::after {
        content: '' !important;
        position: absolute !important;
        left: 0 !important;
        width: 100% !important;
        height: 2px !important;
        background-color: currentColor !important;
        border-radius: 1px !important;
        transition: all 0.3s ease !important;
    }
    
    .navbar-toggler-icon::before {
        top: 4px !important;
    }
    
    .navbar-toggler-icon::after {
        bottom: 4px !important;
    }
    
    /* Middle line */
    .navbar-toggler-icon {
        background-color: currentColor !important;
        height: 2px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        border-radius: 1px !important;
        transition: all 0.3s ease !important;
    }
    
    /* Animation when expanded */
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
        background-color: transparent !important;
    }
    
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
        transform: rotate(45deg) !important;
        top: 50% !important;
        bottom: auto !important;
    }
    
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
        transform: rotate(-45deg) !important;
        top: 50% !important;
        bottom: auto !important;
    }
    
    /* Mobile navbar collapse */
    .navbar-collapse {
        background-color: var(--surface-bg) !important;
        border-top: 1px solid var(--border-color) !important;
        margin-top: 1rem !important;
        padding: 1rem 0 !important;
        border-radius: var(--radius-md) !important;
        box-shadow: var(--shadow-lg) !important;
        position: relative !important;
    }
    
    /* Add a subtle animation to the menu button */
    .navbar-toggler {
        overflow: hidden !important;
    }
    
    .navbar-toggler::before {
        content: '' !important;
        position: absolute !important;
        top: 0 !important;
        left: -100% !important;
        width: 100% !important;
        height: 100% !important;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent) !important;
        transition: left 0.5s !important;
    }
    
    .navbar-toggler:hover::before {
        left: 100% !important;
    }
    
    .navbar-collapse.show {
        display: block !important;
        animation: slideDown 0.3s ease !important;
    }
    
    .navbar-collapse.collapsing {
        height: auto !important;
        transition: height 0.3s ease !important;
    }
    
   /* Mobile nav links */
    .navbar-nav .nav-link {
        padding: 0.4rem 0.6rem !important;
        margin: 0.1rem 0 !important;
        border-radius: var(--radius-md) !important;
        color: var(--text-primary) !important;
        transition: all var(--transition-fast) !important;
        display: flex !important;
        align-items: center !important;
        min-height: 34px !important;
        font-size: 0.85rem !important;
        font-weight: 500 !important;
    }
    
    .navbar-nav .nav-link:hover {
        background-color: var(--surface-secondary) !important;
        color: var(--primary-color) !important;
        transform: translateX(4px) !important;
    }
    
    .navbar-nav .nav-link.active {
        background-color: var(--primary-color) !important;
        color: var(--text-inverse) !important;
        font-weight: 600 !important;
    }
    
    .navbar-nav .nav-link i {
        width: 1rem !important;
        text-align: center !important;
        font-size: 0.8rem !important;
        margin-right: 0.35rem !important;
    }
    
    /* Mobile dropdowns in navbar */
    .navbar-nav .dropdown-menu {
        position: static !important;
        float: none !important;
        width: 100% !important;
        margin-top: 0.2rem !important;
        background-color: var(--surface-secondary) !important;
        border: 1px solid var(--border-color) !important;
        border-radius: var(--radius-md) !important;
        box-shadow: none !important;
        padding: 0.2rem 0 !important;
    }
    
    .navbar-nav .dropdown-item {
        padding: 0.3rem 0.8rem !important;
        color: var(--text-primary) !important;
        transition: all var(--transition-fast) !important;
        min-height: 32px !important;
        display: flex !important;
        align-items: center !important;
        font-size: 0.8rem !important;
        margin: 0.02rem 0 !important;
    }
    
    .navbar-nav .dropdown-item:hover {
        background-color: var(--surface-tertiary) !important;
        color: var(--primary-color) !important;
        transform: translateX(8px) !important;
    }
    
    .navbar-nav .dropdown-item i {
        width: 0.9rem !important;
        text-align: center !important;
        font-size: 0.75rem !important;
        margin-right: 0.4rem !important;
    }
    
    .navbar-nav .dropdown-divider {
        border-color: var(--border-color) !important;
        margin: 0.15rem 0 !important;
    }
    
    /* Mobile user menu */
    .navbar-nav .dropdown-toggle::after {
        margin-left: 0.5rem !important;
        transition: transform var(--transition-fast) !important;
    }
    
    .navbar-nav .dropdown.show .dropdown-toggle::after {
        transform: rotate(180deg) !important;
    }
    
    /* Mobile search in navbar */
    .navbar-nav .d-none.d-lg-flex {
        display: none !important;
    }
    
}

/* Dark mode mobile menu fixes */
@media (max-width: 991.98px) {
    [data-theme="dark"] .navbar-toggler {
        background-color: var(--surface-bg) !important;
        border-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar-toggler:hover,
    [data-theme="dark"] .navbar-toggler:focus {
        background-color: var(--surface-secondary) !important;
        border-color: var(--primary-color) !important;
        color: var(--primary-color) !important;
    }
    
    [data-theme="dark"] .navbar-collapse {
        background-color: var(--surface-bg) !important;
        border-top-color: var(--border-color) !important;
    }
    
    [data-theme="dark"] .navbar-nav .nav-link {
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar-nav .nav-link:hover {
        background-color: var(--surface-secondary) !important;
        color: var(--primary-color) !important;
    }
    
    [data-theme="dark"] .navbar-nav .dropdown-menu {
        background-color: var(--surface-secondary) !important;
        border-color: var(--border-color) !important;
    }
    
    [data-theme="dark"] .navbar-nav .dropdown-item {
        color: var(--text-primary) !important;
    }
    
    [data-theme="dark"] .navbar-nav .dropdown-item:hover {
        background-color: var(--surface-tertiary) !important;
        color: var(--primary-color) !important;
    }
}

/* Mobile menu animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile menu open state */
.mobile-menu-open {
    overflow: hidden !important;
}

.mobile-menu-open .navbar-collapse {
    position: fixed !important;
    top: 100% !important;
    left: 0 !important;
    right: 0 !important;
    z-index: 1050 !important;
    background-color: var(--surface-bg) !important;
    border-top: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-lg) !important;
    max-height: calc(100vh - 100%) !important;
    overflow-y: auto !important;
}

/* Mobile menu backdrop */
.mobile-menu-open::before {
    content: '' !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background-color: rgba(0, 0, 0, 0.5) !important;
    z-index: 1040 !important;
}

/* Mobile menu close button */
@media (max-width: 991.98px) {
    .navbar-collapse::before {
        content: '×' !important;
        position: absolute !important;
        top: 1rem !important;
        right: 1rem !important;
        font-size: 1.5rem !important;
        color: var(--text-muted) !important;
        cursor: pointer !important;
        z-index: 1 !important;
        width: 2rem !important;
        height: 2rem !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 50% !important;
        background-color: var(--surface-secondary) !important;
        transition: all var(--transition-fast) !important;
    }
    
    .navbar-collapse::before:hover {
        background-color: var(--surface-tertiary) !important;
        color: var(--text-primary) !important;
    }
}

/* ========================================
   INDEX.PHP SPECIFIC DARK MODE FIXES
   ======================================== */

[data-theme="dark"] .features-section {
    background-color: var(--body-bg) !important;
}

[data-theme="dark"] .features-section h2,
[data-theme="dark"] .features-section .lead {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .feature-card {
    background-color: var(--surface-bg) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .feature-card h4 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .feature-card .text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .stats-section {
    background-color: var(--surface-secondary) !important;
}

[data-theme="dark"] .stats-section h3 {
    color: var(--primary-color) !important;
}

[data-theme="dark"] .stats-section .text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .recent-notes {
    background-color: var(--body-bg) !important;
}

[data-theme="dark"] .recent-notes h2,
[data-theme="dark"] .recent-notes .text-muted {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .popular-collections {
    background-color: var(--surface-secondary) !important;
}

[data-theme="dark"] .popular-collections h2,
[data-theme="dark"] .popular-collections .text-muted {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .hero-section .text-warning {
    color: var(--hero-accent) !important;
}

[data-theme="dark"] .hero-section .btn-outline-light {
    color: var(--hero-text) !important;
    border-color: var(--hero-text) !important;
}

[data-theme="dark"] .hero-section .btn-outline-light:hover {
    background-color: var(--hero-text) !important;
    color: var(--hero-bg) !important;
}

/* ========================================
   FOOTER STYLES
   ======================================== */
.footer {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: var(--text-inverse);
}

.footer-brand .brand-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-lg);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    color: var(--text-muted);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: var(--text-lg);
}

.social-link:hover {
    color: var(--text-inverse);
    background-color: var(--primary-color);
    transform: translateY(-2px);
    text-decoration: none;
}

.footer h5, .footer h6 {
    color: var(--text-inverse);
    font-weight: 600;
}

.footer .list-unstyled li {
    margin-bottom: var(--space-sm);
}

.footer .list-unstyled a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer .list-unstyled a:hover {
    color: var(--primary-light);
    text-decoration: none;
}

.footer .newsletter-form .input-group {
    margin-bottom: var(--space-sm);
}

.footer .newsletter-form .form-control {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-inverse);
}

.footer .newsletter-form .form-control::placeholder {
    color: var(--text-muted);
}

.footer .newsletter-form .form-control:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    color: var(--text-inverse);
}

.footer .newsletter-form .btn {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.footer .newsletter-form .btn:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* ========================================
   HERO SECTION STYLES
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-icon-container {
    position: relative;
    z-index: 2;
}

.hero-icon {
    font-size: 8rem;
    color: rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.hero-stats {
    position: relative;
    z-index: 2;
}

.stat-item {
    text-align: center;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-number {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-inverse);
    line-height: 1;
}

.stat-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: var(--space-xs);
}

/* Mobile optimizations for hero */
@media (max-width: 768px) {
    .hero-section {
        padding: var(--space-4xl) 0;
    }
    
    .hero-icon {
        font-size: 6rem;
    }
    
    .stat-item {
        padding: var(--space-sm);
    }
    
    .stat-number {
        font-size: var(--text-xl);
    }
    
    .stat-label {
        font-size: var(--text-xs);
    }
}

/* Mobile-specific animations */
@media (max-width: 768px) {
    .fade-in-mobile {
        animation: fadeInMobile 0.3s ease-in-out;
    }
    
    .slide-up-mobile {
        animation: slideUpMobile 0.3s ease-in-out;
    }
    
    .scale-in-mobile {
        animation: scaleInMobile 0.2s ease-in-out;
    }
}

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

@keyframes slideUpMobile {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleInMobile {
    from { 
        opacity: 0;
        transform: scale(0.9);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

/* Mobile-specific improvements for specific components */
@media (max-width: 768px) {
    /* Improve note cards on mobile */
    .note-card {
        margin-bottom: 1rem;
    }
    
    .note-card .card-body {
        padding: 1rem;
    }
    
    .note-card .card-title {
        font-size: 1rem;
        line-height: 1.3;
    }
    
    .note-card .note-meta {
        font-size: 0.8rem;
        margin-top: 0.5rem;
    }
    
    .note-card .btn-group {
        margin-top: 0.75rem;
    }
    
    .note-card .btn {
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
    }
    
    /* Improve collection cards on mobile */
    .collection-card .card-body {
        padding: 0.75rem;
    }
    
    .collection-card .card-title {
        font-size: 0.95rem;
        margin-bottom: 0.5rem;
    }
    
    .collection-card .card-text {
        font-size: 0.85rem;
        line-height: 1.4;
    }
    
    .collection-card .badge {
        font-size: 0.7rem;
        padding: 0.25rem 0.5rem;
    }
    
    /* Improve admin stats on mobile */
    .admin-stats .card {
        margin-bottom: 0.75rem;
    }
    
    .admin-stats .card-body {
        padding: 1rem 0.75rem;
    }
    
    .admin-stats .h2 {
        font-size: 1.5rem;
    }
    
    .admin-stats .text-muted {
        font-size: 0.85rem;
    }
    
    /* Improve user dashboard on mobile */
    .user-stats .card {
        margin-bottom: 0.75rem;
    }
    
    .user-stats .card-body {
        padding: 0.75rem;
    }
    
    /* Improve forms on mobile */
    .form-floating > .form-control {
        padding-top: 1.625rem;
        padding-bottom: 0.625rem;
    }
    
    .form-floating > label {
        padding: 1rem 0.75rem;
    }
    
    /* Improve file upload on mobile */
    .file-upload-area {
        padding: 1.5rem 1rem;
        text-align: center;
    }
    
    .file-upload-area h5 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
    
    .file-upload-area p {
        font-size: 0.9rem;
        margin-bottom: 0.75rem;
    }
    
    .file-upload-area small {
        font-size: 0.8rem;
    }
    
    /* Improve comments on mobile */
    .comment-item {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }
    
    .comment-meta {
        font-size: 0.8rem;
        margin-bottom: 0.5rem;
    }
    
    .comment-content {
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    /* Improve pagination on mobile */
    .pagination {
        justify-content: center;
        flex-wrap: wrap;
        margin: 1rem 0;
    }
    
    .pagination .page-item {
        margin: 0.125rem;
    }
    
    .pagination .page-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        border-radius: 0.375rem;
    }
    
    /* Improve alerts on mobile */
    .alert {
        margin-bottom: 1rem;
        padding: 0.75rem 1rem;
        border-radius: 0.5rem;
    }
    
    .alert-dismissible .btn-close {
        padding: 0.75rem 1rem;
    }
    
    /* Improve badges on mobile */
    .badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.5rem;
        margin: 0.125rem;
    }
    
    /* Improve buttons on mobile */
    .btn-group-vertical .btn {
        margin-bottom: 0.25rem;
    }
    
    .btn-group-vertical .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Improve tabs on mobile */
    .nav-tabs {
        border-bottom: 2px solid var(--border-color);
    }
    
    .nav-tabs .nav-link {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        border-radius: 0.375rem 0.375rem 0 0;
    }
    
    .nav-tabs .nav-link.active {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }
    
    /* Improve accordion on mobile */
    .accordion-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .accordion-body {
        padding: 1rem;
        font-size: 0.9rem;
    }
}