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

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: #333;
            background: #f5f7fa;
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
                    background: rgba(255, 255, 255, 0.8);
                    backdrop-filter: saturate(120%) blur(10px);
                    -webkit-backdrop-filter: saturate(120%) blur(10px);
                    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.06);
                    position: sticky;
                    top: 0;
                    z-index: 1000;
                }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: #667eea;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 0;
            background: #f8f9fa;
            padding: 0.5rem;
            border-radius: 25px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu li a {
            text-decoration: none;
            color: #555;
            font-weight: 500;
            font-size: 0.9rem;
            padding: 0.75rem 1.5rem;
            border-radius: 25px;
            transition: all 0.3s ease;
            position: relative;
            display: block;
        }

        .nav-menu li a:hover {
            color: white;
            background: #667eea;
            transform: none;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
        }

        .nav-menu li a.active {
            color: white;
            background: #667eea;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .mobile-menu-toggle {
            display: none;
            background: #f8f9fa;
            border: 1px solid #e1e5e9;
            font-size: 1.2rem;
            color: #667eea;
            cursor: pointer;
            padding: 0.75rem;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .mobile-menu-toggle:hover {
            background: #e9ecef;
            border-color: #667eea;
        }

        /* Hero Section */
        .hero {
                    background: linear-gradient(180deg, #ffffff 0%, #fafbff 100%);
                    padding: 4.5rem 0;
                    text-align: center;
                    margin: 2rem 0;
                    border-radius: 16px;
                    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.08);
                }

        .hero h1 {
                    font-size: 2.25rem;
                    font-weight: 800;
                    letter-spacing: -0.02em;
                    color: #1f2937;
                    margin-bottom: 1rem;
                }

        .hero p {
                    font-size: 1.1rem;
                    color: #4b5563;
                    max-width: 760px;
                    margin: 0 auto 2.25rem;
                }

        .cta-button {
            display: inline-block;
            background: #667eea;
            color: white;
            padding: 1rem 2rem;
            text-decoration: none;
            border-radius: 25px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
        }

        .cta-button:hover {
            background: #5a6fd8;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }

        .hero-submit-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5em;
            background: #667eea;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 25px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
            transition: all 0.3s ease;
            margin-top: 2rem;
        }

        .hero-submit-btn i {
            font-size: 1.2em;
        }

        .hero-submit-btn:hover {
            background: #5a6fd8;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }

        /* Main Content */
        .main-content {
                    background: white;
                    margin: 2rem 0;
                    border-radius: 16px;
                    overflow: hidden;
                    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
                }

        .content-tabs {
            display: flex;
            background: #f8f9fa;
            overflow-x: auto;
        }

        .tab-button {
            background: none;
            border: none;
            padding: 1rem 2rem;
            cursor: pointer;
            font-weight: 500;
            color: #666;
            transition: all 0.3s ease;
            white-space: nowrap;
            border-bottom: 3px solid transparent;
        }

        .tab-button.active {
            color: #667eea;
            border-bottom-color: #667eea;
            background: white;
        }

        .tab-button.search-highlight {
            background: rgba(255, 193, 7, 0.2);
            color: #f39c12;
            position: relative;
        }

        .tab-button.search-highlight::after {
            content: '●';
            position: absolute;
            top: 0.25rem;
            right: 0.25rem;
            color: #f39c12;
            font-size: 0.8rem;
        }

        body.dark-mode .tab-button.search-highlight {
            background: rgba(241, 196, 15, 0.3);
            color: #f1c40f;
        }

        .tab-content {
            display: none;
            padding: 2rem;
        }

        .tab-content.active {
            display: block;
        }

        .resource-category {
            margin-bottom: 3rem;
        }

        .category-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #333;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #667eea;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }

        .resource-card {
                    background: white;
                    padding: 1.5rem;
                    border-radius: 14px;
                    transition: all 0.25s ease;
                    border: 1px solid #eef1f5;
                    position: relative;
                    overflow: hidden;
                    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
                }

        .resource-card:hover {
                    transform: translateY(-4px);
                    box-shadow: 0 14px 30px rgba(102, 126, 234, 0.15);
                    border-color: #dfe6fb;
                }

        /* Clickable resource cards */
        .resource-card[data-url] {
            cursor: pointer;
        }

        .resource-card[data-url]:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
            border-color: #667eea;
        }

        /* Resource title without clickable link */
        .resource-name {
            color: #667eea;
            font-weight: 600;
            text-decoration: none;
        }

        /* App store buttons */
        .app-store-buttons {
            display: flex;
            gap: 8px;
            margin: 12px 0;
            flex-wrap: wrap;
        }

        .app-store-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 4px;
            border-radius: 8px;
            text-decoration: none;
            transition: all 0.2s ease;
            border: none;
            background: transparent;
        }

        .app-store-img {
            height: 40px;
            width: auto;
            border-radius: 6px;
            transition: all 0.2s ease;
        }

        .app-store-btn:hover .app-store-img {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        /* Dark mode compatibility for app store images */
        body.dark-mode .app-store-img {
            opacity: 0.9;
        }

        body.dark-mode .app-store-btn:hover .app-store-img {
            opacity: 1;
        }

        .resource-title {
            font-weight: 600;
            color: #333;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .resource-title a {
            color: #667eea;
            text-decoration: none;
        }

        .resource-title a:hover {
            text-decoration: underline;
        }

        .resource-description {
            color: #666;
            font-size: 0.9rem;
            line-height: 1.5;
        }

        .resource-contributor {
            margin-top: 0.75rem;
            color: #6b7280;
            font-size: 0.8rem;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(102, 126, 234, 0.08);
            padding: 0.25rem 0.6rem;
            border-radius: 12px;
            border: 1px solid rgba(102, 126, 234, 0.12);
        }

        .resource-contributor i {
            color: #667eea;
            font-size: 0.75rem;
        }

        body.dark-mode .resource-contributor {
            background: rgba(52, 152, 219, 0.15);
            border-color: rgba(52, 152, 219, 0.2);
            color: #bdc3c7;
        }

        body.dark-mode .resource-contributor i {
            color: #3498db;
        }

        .resource-type {
                    display: inline-block;
                    background: #eef2ff;
                    color: #4f46e5;
                    padding: 0.25rem 0.6rem;
                    border-radius: 10px;
                    font-size: 0.75rem;
                    margin-top: 0.75rem;
                    border: 1px solid #e0e7ff;
                }

        /* Pricing-specific card backgrounds - Subtle style */
        .pricing-free {
                    border-left: 4px solid #22c55e;
                    background: #fbfefd;
                }

        .pricing-freemium {
                    border-left: 4px solid #fbbf24;
                    background: #fffdf6;
                }

        .pricing-premium {
                    border-left: 4px solid #f43f5e;
                    background: #fff8fa;
                }

        /* Pricing badges - Simple style */
        .pricing-badge {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-left: 0.5rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .freemium-badge {
            background: #fbbf24;
            color: white;
        }

        .premium-badge {
            background: #f43f5e;
            color: white;
        }

        /* Resource tags */
        .resource-tags {
            display: flex;
            gap: 0.75rem;
            margin: 1.5rem 0 1rem;
            flex-wrap: wrap;
        }

        .resource-tag {
            background: rgba(102, 126, 234, 0.1);
            color: #667eea;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            font-size: 0.75rem;
            font-weight: 500;
            border: 1px solid rgba(102, 126, 234, 0.2);
            transition: all 0.3s ease;
        }

        .resource-tag:hover {
            background: rgba(102, 126, 234, 0.15);
            border-color: #667eea;
        }

        /* Footer */
        footer {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-align: center;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
            position: relative;
            overflow: hidden;
        }

        footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
            pointer-events: none;
        }

        .footer-content {
            position: relative;
            z-index: 1;
        }

        .footer-content p {
            margin: 0.75rem 0;
            opacity: 0.95;
        }

        .footer-content a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            transition: all 0.3s ease;
            display: inline-block;
        }

        .footer-content a:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-1px);
        }

        body.dark-mode footer {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 1rem;
        }

        .social-links a {
            color: #667eea;
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        .social-links a:hover {
            color: #5a6fd8;
        }

        /* Dark Mode Styles */
        body.dark-mode {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: #ecf0f1;
        }

        body.dark-mode header {
            background: rgba(52, 73, 94, 0.95);
            border-bottom-color: rgba(52, 73, 94, 0.3);
        }

        body.dark-mode .nav-menu {
            background: rgba(44, 62, 80, 0.8);
        }

        body.dark-mode .nav-menu li a {
            color: #bdc3c7;
        }

        body.dark-mode .nav-menu li a:hover,
        body.dark-mode .nav-menu li a.active {
            color: white;
            background: linear-gradient(45deg, #3498db, #2980b9);
            box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
        }

        body.dark-mode .logo {
            color: #3498db;
        }

        body.dark-mode .logo::after {
            background: linear-gradient(90deg, #3498db, #2980b9);
        }

        body.dark-mode .mobile-menu-toggle {
            background: rgba(52, 73, 94, 0.3);
            color: #3498db;
        }

        body.dark-mode .mobile-menu-toggle:hover {
            background: rgba(52, 73, 94, 0.5);
        }

        body.dark-mode .main-content {
            background: #34495e;
        }

        body.dark-mode .content-tabs {
            background: #2c3e50;
        }

        body.dark-mode .tab-button {
            color: #bdc3c7;
        }

        body.dark-mode .tab-button.active {
            color: #3498db;
            background: #34495e;
            border-bottom-color: #3498db;
        }

        body.dark-mode .resource-card {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            border-color: rgba(255, 255, 255, 0.1);
            box-shadow: 
                0 4px 6px -1px rgba(0, 0, 0, 0.3),
                0 2px 4px -1px rgba(0, 0, 0, 0.2);
        }

        body.dark-mode .resource-card:hover {
            box-shadow: 
                0 25px 50px -12px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(52, 152, 219, 0.2);
            border-color: rgba(52, 152, 219, 0.3);
        }

        body.dark-mode .resource-title {
            color: #ecf0f1;
        }

        body.dark-mode .resource-title a {
            background: linear-gradient(135deg, #3498db, #2980b9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        body.dark-mode .resource-title a:hover {
            -webkit-text-fill-color: initial;
            color: #3498db;
        }

        body.dark-mode .resource-description {
            color: #bdc3c7;
        }

        body.dark-mode .resource-type {
            background: linear-gradient(135deg, #34495e, #2c3e50);
            color: #bdc3c7;
            border-color: rgba(255, 255, 255, 0.1);
        }

        /* Dark mode pricing cards */
        body.dark-mode .pricing-free {
            background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
            border-color: rgba(16, 185, 129, 0.3);
        }

        body.dark-mode .pricing-freemium {
            background: linear-gradient(135deg, #451a03 0%, #78350f 100%);
            border-color: rgba(245, 158, 11, 0.3);
        }

        body.dark-mode .pricing-premium {
            background: linear-gradient(135deg, #4c1d95 0%, #6b21a8 100%);
            border-color: rgba(244, 63, 94, 0.3);
        }

        body.dark-mode .resource-corner-image {
            border-color: rgba(52, 73, 94, 0.8);
            box-shadow: 
                0 4px 12px rgba(0, 0, 0, 0.3),
                0 0 0 2px rgba(52, 73, 94, 0.8);
        }

        body.dark-mode .resource-tag {
            background: linear-gradient(135deg, rgba(52, 152, 219, 0.2), rgba(41, 128, 185, 0.2));
            color: #3498db;
            border-color: rgba(52, 152, 219, 0.3);
        }

        body.dark-mode .resource-tag:hover {
            background: linear-gradient(135deg, rgba(52, 152, 219, 0.3), rgba(41, 128, 185, 0.3));
            box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
        }

        body.dark-mode .category-title {
            color: #ecf0f1;
            border-bottom-color: #3498db;
        }

        body.dark-mode footer {
            background: rgba(52, 73, 94, 0.95);
        }

        body.dark-mode .footer-content {
            color: #bdc3c7;
        }

        /* Search and Filter Styles */
        .search-filter-section {
            background: white;
            padding: 2rem;
            margin: 2rem 0;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
        }

        body.dark-mode .search-filter-section {
            background: #2c3e50;
        }

        .search-box {
            flex: 1;
            min-width: 300px;
            max-width: 500px;
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 1rem 1rem 1rem 3rem;
            border: none;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.9);
            font-size: 1rem;
            outline: none;
            transition: all 0.3s ease;
        }

        .search-input:focus {
            background: white;
            box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
        }

        body.dark-mode .search-input {
            background: rgba(44, 62, 80, 0.9);
            color: #ecf0f1;
        }

        body.dark-mode .search-input:focus {
            background: #2c3e50;
        }

        .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: #666;
            font-size: 1.2rem;
        }

        body.dark-mode .search-icon {
            color: #bdc3c7;
        }

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

        .filter-btn {
            padding: 0.5rem 1rem;
            border: 2px solid #e1e5e9;
            background: #f8f9fa;
            color: #333;
            border-radius: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: #667eea;
            color: white;
            border-color: #667eea;
        }

        .tag-filters {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .tag-filter {
            padding: 0.5rem 1rem;
            border: 2px solid #e1e5e9;
            background: #f8f9fa;
            color: #333;
            border-radius: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .tag-filter:hover,
        .tag-filter.active {
            background: #667eea;
            color: white;
            border-color: #667eea;
        }

        .dark-mode-toggle {
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            padding: 0.75rem;
            border-radius: 50%;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1.2rem;
        }

        .dark-mode-toggle:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: rotate(180deg);
        }

        /* Enhanced Resource Cards */
        .resource-card {
            position: relative;
            overflow: hidden;
        }

        .resource-tags {
            display: flex;
            gap: 0.75rem;
            margin: 1.5rem 0 1rem;
            flex-wrap: wrap;
        }

        .resource-tag {
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
            color: #667eea;
            padding: 0.4rem 0.8rem;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border: 1px solid rgba(102, 126, 234, 0.2);
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
        }

        .resource-tag:hover {
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(102, 126, 234, 0.2);
        }

        body.dark-mode .resource-tag {
            background: rgba(52, 152, 219, 0.2);
            color: #3498db;
            border-color: rgba(52, 152, 219, 0.3);
        }

        /* YouTube Icon Styling */
        .youtube-icon {
            color: #ff0000 !important;
            display: inline-block !important;
            visibility: visible !important;
        }

        body.dark-mode .youtube-icon {
            color: #ff4444 !important;
        }

        .category-title .youtube-icon {
            display: inline-block !important;
            color: #ff0000 !important;
            font-size: 1.2em !important;
        }

        /* YouTube channel image styling */
        .youtube-channel-image {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            object-fit: cover;
            /* border: 2px solid #ff0000; */
            margin-right: 0.5rem;
        }

        /* Floating Action Button for Resource Submission - only for the submission button */
        .fab.submission-btn {
            position: fixed;
            bottom: 2rem;
            left: 2rem;
            width: 60px;
            height: 60px;
            background: #667eea;
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .fab.submission-btn:hover {
            background: #5a6fd8;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
        }

        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(5px);
            z-index: 2000;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 2rem;
            border-radius: 20px;
            max-width: 500px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
        }

        body.dark-mode .modal-content {
            background: #34495e;
            color: #ecf0f1;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .modal-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #667eea;
        }

        body.dark-mode .modal-title {
            color: #3498db;
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #666;
            padding: 0.5rem;
            border-radius: 50%;
            transition: all 0.3s ease;
        }

        .close-btn:hover {
            background: rgba(0, 0, 0, 0.1);
            transform: rotate(90deg);
        }

        body.dark-mode .close-btn {
            color: #bdc3c7;
        }

        body.dark-mode .close-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: #333;
        }

        body.dark-mode .form-label {
            color: #ecf0f1;
        }

        .form-input,
        .form-textarea,
        .form-select {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
            background: white;
        }

        .form-input:focus,
        .form-textarea:focus,
        .form-select:focus {
            outline: none;
            border-color: #667eea;
        }

        body.dark-mode .form-input,
        body.dark-mode .form-textarea,
        body.dark-mode .form-select {
            background: #2c3e50;
            border-color: #34495e;
            color: #ecf0f1;
        }

        .form-textarea {
            resize: vertical;
            min-height: 100px;
        }

        .form-help {
            font-size: 0.8rem;
            color: #6b7280;
            margin-top: 0.25rem;
            display: block;
        }

        .recaptcha-info {
            text-align: center;
            margin: 1rem 0;
        }

        .recaptcha-info small {
            color: #6b7280;
            font-size: 0.8rem;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        .recaptcha-info i {
            color: #667eea;
        }

        body.dark-mode .recaptcha-info small {
            color: #95a5a6;
        }

        .submit-btn {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .submit-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .submit-btn:disabled:hover {
            transform: none;
            box-shadow: none;
        }

        /* Enhanced Animations */
        .resource-card {
            animation: slideUp 0.3s ease forwards;
            opacity: 0;
            transform: translateY(20px);
        }

        .resource-card:nth-child(1) { animation-delay: 0.05s; }
        .resource-card:nth-child(2) { animation-delay: 0.1s; }
        .resource-card:nth-child(3) { animation-delay: 0.15s; }
        .resource-card:nth-child(4) { animation-delay: 0.2s; }
        .resource-card:nth-child(5) { animation-delay: 0.25s; }
        .resource-card:nth-child(6) { animation-delay: 0.3s; }

        /* Faster animation for tab switching */
        .tab-content.active .resource-card {
            animation: slideUpFast 0.2s ease forwards;
            animation-delay: 0s;
        }

        .tab-content.active .resource-card:nth-child(1) { animation-delay: 0.02s; }
        .tab-content.active .resource-card:nth-child(2) { animation-delay: 0.04s; }
        .tab-content.active .resource-card:nth-child(3) { animation-delay: 0.06s; }
        .tab-content.active .resource-card:nth-child(4) { animation-delay: 0.08s; }
        .tab-content.active .resource-card:nth-child(5) { animation-delay: 0.1s; }
        .tab-content.active .resource-card:nth-child(6) { animation-delay: 0.12s; }

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

        @keyframes slideUpFast {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: calc(100% + 1rem);
                left: 1rem;
                right: 1rem;
                background: rgba(255, 255, 255, 0.95);
                flex-direction: column;
                padding: 1.5rem;
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
                border-radius: 20px;
                backdrop-filter: blur(20px);
                border: 1px solid rgba(255, 255, 255, 0.2);
            }

            body.dark-mode .nav-menu {
                background: rgba(44, 62, 80, 0.95);
                border-color: rgba(52, 73, 94, 0.3);
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-menu li {
                width: 100%;
            }

            .nav-menu li a {
                padding: 1rem 1.5rem;
                margin: 0.25rem 0;
                text-align: center;
                border-radius: 15px;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .content-tabs {
                flex-wrap: wrap;
            }

            .tab-button {
                flex: 1;
                min-width: 120px;
            }

            .resource-grid {
                grid-template-columns: 1fr;
            }

            .nav-actions {
                gap: 0.5rem;
            }
        }

        /* Smooth scrolling */
        html {
            scroll-behavior: smooth;
        }

        /* Loading animation */
        .loading {
            opacity: 0;
            animation: fadeIn 0.5s ease-in forwards;
        }

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

        /* Channel image circle for YouTube cards */
        .channel-image {
            width: 2.2em;
            height: 2.2em;
            border-radius: 50%;
            object-fit: cover;
            display: inline-block;
            margin-right: 0.5em;
            box-shadow: 0 2px 8px rgba(0,0,0,0.10);
            border: 2px solid #fff;
            background: #fff;
            vertical-align: middle;
        }
        .resource-card .resource-title {
            display: flex;
            align-items: center;
            gap: 0.5em;
        }
        
        /* YouTube channel image/icon styling */
        .resource-card .resource-title .youtube-icon {
            display: inline-block !important;
            color: #ff0000 !important;
            font-size: 1.2em !important;
            margin-right: 0.3em;
        }
        
        .category-title .youtube-icon {
            display: inline-block !important;
        }