/* Modern Collocations Dictionary Styles */
/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color Palette - Professional Blue & Green */
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --accent-green: #10b981;
    --accent-green-light: #34d399;
    --accent-orange: #f59e0b;
    
    /* Grays */
    --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;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing - 紧凑版 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.375rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.25rem;
    --spacing-2xl: 1.75rem;
    --spacing-3xl: 2.5rem;
    
    /* Borders & Shadows */
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;

    /* Semantic Color Tokens */
    --bg-primary: var(--gray-50);
    --bg-secondary: white;
    --bg-elevated: white;
    --bg-navbar: rgba(255, 255, 255, 0.95);

    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-600);
    --text-muted: var(--gray-500);

    --border-primary: var(--gray-200);
    --border-secondary: var(--gray-300);

    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Dark Theme */
[data-theme="dark"] {
    /* Inverted Gray Scale */
    --gray-50: #0f172a;
    --gray-100: #1e293b;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #64748b;
    --gray-500: #94a3b8;
    --gray-600: #cbd5e1;
    --gray-700: #e2e8f0;
    --gray-800: #f1f5f9;
    --gray-900: #f8fafc;

    /* Adjusted Primary Colors for Dark Mode */
    --primary-blue: #3b82f6;
    --primary-blue-light: #60a5fa;
    --primary-blue-dark: #2563eb;

    --accent-green: #34d399;
    --accent-green-light: #6ee7b7;

    /* Semantic Color Tokens */
    --bg-primary: var(--gray-50);
    --bg-secondary: var(--gray-100);
    --bg-elevated: var(--gray-200);
    --bg-navbar: rgba(15, 23, 42, 0.95);

    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-800);
    --text-tertiary: var(--gray-700);
    --text-muted: var(--gray-500);

    --border-primary: var(--gray-700);
    --border-secondary: var(--gray-600);

    --shadow-color: rgba(0, 0, 0, 0.5);
}

/* Prevent Transition Flicker on Initial Load */
.theme-loading * {
    transition: none !important;
}

/* Smooth Transitions for Theme Changes */
body,
.navbar,
.card,
.search-input,
.btn,
.modal-content,
.category-item,
.collocation-card {
    transition: background-color var(--transition-normal),
                color var(--transition-normal),
                border-color var(--transition-normal);
}

/* Typography - 紧凑版 */
body {
    font-family: var(--font-sans);
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--gray-50);
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 1.875rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.5rem;
    letter-spacing: -0.025em;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.125rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-600);
}

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

a:hover {
    color: var(--primary-blue-dark);
}

/* Layout */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.navbar-brand .brand-link {
    display: flex;
    align-items: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary-blue);
    text-decoration: none;
}

.navbar-brand h1 {
    margin: 0;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Search Component */
.search-container {
    flex: 1;
    max-width: 600px;
    margin: 0 var(--spacing-xl);
    position: relative;
}

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

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 4rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    background: white;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.search-button {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-blue);
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-button:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-50%) scale(1.05);
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-top: none;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    max-height: 300px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: var(--shadow-lg);
    display: none;
}

.search-suggestions.active {
    display: block;
}

/* Language Switcher */
.language-switcher {
    position: relative;
}

.lang-toggle {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--gray-600);
    box-shadow: none;
    min-width: 100px;
    justify-content: space-between;
}

.lang-toggle:hover {
    background: var(--gray-50);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.lang-toggle:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 140px;
    z-index: 100;
    display: none;
    list-style: none;
    padding: var(--spacing-xs);
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.lang-menu.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lang-menu li {
    margin: 0;
}

.lang-menu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.lang-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-blue);
    border-radius: 2px;
    transition: height var(--transition-fast);
}

.lang-menu a:hover {
    background: var(--gray-50);
    color: var(--primary-blue);
    padding-left: calc(var(--spacing-md) + 4px);
}

.lang-menu a:hover::before {
    height: 60%;
}

.lang-menu a.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    color: white;
    font-weight: 600;
}

.lang-menu a.active::before {
    display: none;
}

.lang-menu a.active:hover {
    background: linear-gradient(135deg, var(--primary-blue-dark), var(--accent-green));
    padding-left: var(--spacing-md);
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-md) 0;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    list-style: none;
    font-size: 0.875rem;
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-sm);
    color: var(--gray-400);
}

.breadcrumb-item a {
    color: var(--gray-600);
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary-blue);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-2xl) 0;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
}

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

.btn-primary:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

.btn.large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1rem;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--gray-500);
}

.text-sm {
    font-size: 0.875rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.font-mono {
    font-family: var(--font-mono);
}

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

/* Loading States */
.loading {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.loading::before {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

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

.slide-up {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    color: white;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

.footer-links,
.footer-langs {
    list-style: none;
}

.footer-links li,
.footer-langs li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a,
.footer-langs a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-langs a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-700);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .navbar .container {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .search-container {
        margin: 0;
        max-width: none;
        width: 100%;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .grid {
        gap: var(--spacing-md);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
    background: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-md);
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--gray-50);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-toggle:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

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

.theme-icon {
    position: absolute;
    font-size: 1.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-icon-light {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-icon-dark {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

[data-theme="dark"] .theme-toggle {
    background: var(--gray-100);
    border-color: var(--gray-700);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--gray-200);
    border-color: var(--primary-blue);
}

[data-theme="dark"] .theme-icon-light {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .theme-icon-dark {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Dark Mode Component Overrides */
[data-theme="dark"] {
    color-scheme: dark;
}

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

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: var(--text-primary);
}

[data-theme="dark"] p {
    color: var(--text-secondary);
}

[data-theme="dark"] .navbar {
    background: var(--bg-navbar);
    border-bottom-color: var(--border-primary);
    backdrop-filter: blur(12px);
}

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

[data-theme="dark"] .nav-link:hover {
    color: var(--primary-blue-light);
}

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

[data-theme="dark"] .search-input:focus {
    border-color: var(--primary-blue);
    background: var(--bg-elevated);
}

[data-theme="dark"] .search-input::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] .card,
[data-theme="dark"] .word-card,
[data-theme="dark"] .category-item {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
}

[data-theme="dark"] .card:hover,
[data-theme="dark"] .word-card:hover,
[data-theme="dark"] .category-item:hover {
    background: var(--bg-elevated);
    border-color: var(--primary-blue);
}

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

[data-theme="dark"] .btn-primary {
    background: var(--primary-blue);
    color: white;
}

[data-theme="dark"] .btn-primary:hover {
    background: var(--primary-blue-light);
}

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

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

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

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

[data-theme="dark"] .modal-content,
[data-theme="dark"] .search-results-dropdown {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
    box-shadow: 0 20px 25px -5px var(--shadow-color), 0 8px 10px -6px var(--shadow-color);
}

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

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

[data-theme="dark"] .footer {
    background: #0f172a;
    color: var(--gray-400);
    border-top: 1px solid var(--gray-800);
}

[data-theme="dark"] .footer-section h3 {
    color: var(--gray-100);
}

[data-theme="dark"] .footer-section p {
    color: var(--gray-400);
}

[data-theme="dark"] .footer .stats {
    color: var(--gray-500);
}

[data-theme="dark"] .footer-links a,
[data-theme="dark"] .footer-langs a {
    color: var(--gray-400);
}

[data-theme="dark"] .footer-links a:hover,
[data-theme="dark"] .footer-langs a:hover {
    color: var(--primary-blue-light);
}

[data-theme="dark"] .footer-bottom {
    border-top-color: var(--gray-800);
    color: var(--gray-500);
}

[data-theme="dark"] .footer-bottom p {
    color: var(--gray-500);
}

[data-theme="dark"] .footer-meta {
    color: var(--gray-600);
}

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

[data-theme="dark"] .footer-link:hover {
    color: var(--primary-blue-light);
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg,
        #1e293b 0%,
        #334155 50%,
        #1e3a4a 100%);
}

[data-theme="dark"] code,
[data-theme="dark"] pre {
    background: var(--gray-800);
    color: var(--text-primary);
    border-color: var(--border-primary);
}

[data-theme="dark"] a {
    color: var(--primary-blue-light);
}

[data-theme="dark"] a:hover {
    color: var(--primary-blue);
}

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

[data-theme="dark"] .breadcrumb-link {
    color: var(--text-secondary);
}

[data-theme="dark"] .breadcrumb-link:hover {
    color: var(--primary-blue-light);
}

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

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

[data-theme="dark"] .language-option:hover {
    background: var(--bg-elevated);
}

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

[data-theme="dark"] .feature-card:hover {
    background: var(--bg-elevated);
    border-color: var(--primary-blue);
}

[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
    color: var(--text-primary);
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
    border-color: var(--primary-blue);
    background: var(--bg-elevated);
}

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

[data-theme="dark"] img {
    filter: brightness(0.9);
}

/* Print Styles - Always use light mode for printing */
@media print {
    [data-theme="dark"] {
        --bg-primary: white;
        --bg-secondary: white;
        --text-primary: black;
        --text-secondary: #333;
    }

    [data-theme="dark"] body {
        background: white;
        color: black;
    }

    [data-theme="dark"] img {
        filter: none;
    }
}

/* Popular Actions */
.popular-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
}

/* Categories Section */
.categories-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
    color: var(--gray-600);
    font-size: 1rem;
    margin-top: var(--spacing-sm);
}

.categories-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.category-item:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.category-badge {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-blue-light);
    background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--primary-blue) 100%);
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.category-info {
    flex: 1;
}

.category-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.category-meta {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.category-arrow {
    font-size: 1.5rem;
    color: var(--primary-blue);
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-normal);
}

.category-item:hover .category-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Tips Section */
.tips-section {
    padding: var(--spacing-2xl) 0;
    background: var(--gray-50);
}

.tips-banner {
    background: white;
    border: 2px solid var(--primary-blue);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.tips-banner-title {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.tips-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tip-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.tip-bullet {
    color: var(--primary-blue);
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.tip-content {
    color: var(--gray-700);
    line-height: 1.6;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .categories-showcase {
        grid-template-columns: 1fr;
    }
    
    .popular-actions {
        flex-direction: column;
    }
}

/* RTL support */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .navbar .container {
    flex-direction: row-reverse;
}

[dir="rtl"] .lang-toggle {
    padding: 10px 30px 10px 15px;
}

[dir="rtl"] .lang-menu {
    right: auto;
    left: 0;
}

[dir="rtl"] .search-input {
    padding: 12px 20px 12px 50px;
}

[dir="rtl"] .search-button {
    left: 0;
    right: auto;
}