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

        html {
            -webkit-text-size-adjust: 100%;
            -ms-text-size-adjust: 100%;
        }

        input, button, textarea, select {
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
            font-size: 16px;
        }

        button, a {
            -webkit-user-select: none;
            -moz-user-select: none;
            user-select: none;
        }

        :root {
            --primary-color: #3b82f6;
            --secondary-color: #2563eb;
            --accent-color: #06b6d4;
            --text-dark: #1f2937;
            --text-light: #ffffff;
            --background-light: #f8fafc;
            --background-dark: #0f172a;
            --card-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
            --transition: all 0.3s ease;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #ffffff;
            color: #1f2937;
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            -webkit-locale: auto;
        }

        /* Navigation Bar */
        nav {
            background: #ffffff;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            border-bottom: 2px solid #e5e7eb;
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            color: #3b82f6;
            font-size: 24px;
            font-weight: 700;
            font-family: 'Poppins', sans-serif;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        body.dark-mode .logo {
            color: #7dd3fc;
            text-shadow: 0 0 12px rgba(125, 211, 252, 0.45);
        }

        body.dark-mode .logo-brand {
            color: #7dd3fc;
            text-shadow: 0 0 12px rgba(125, 211, 252, 0.45);
        }

        .logo-icon {
            width: 45px;
            height: 45px;
            background: transparent;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--primary-color);
            flex-shrink: 0;
            overflow: hidden;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .logo-title {
            font-size: 24px;
            font-weight: 700;
            font-family: 'Poppins', sans-serif;
            color: inherit;
            line-height: 1;
        }

        .logo-subtitle {
            font-size: 0.75rem;
            opacity: 0.9;
        }

        .back-btn {
            background: #ffffff;
            color: #3b82f6;
            border: 1px solid #e2e8f0;
            padding: 8px 16px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.3s ease;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
            min-height: 44px;
            min-width: 44px;
            justify-content: center;
            -webkit-user-select: none;
            user-select: none;
        }

        .back-btn:active {
            background: #eff6ff;
            transform: scale(0.98);
        }

        @media (hover: hover) {
            .back-btn:hover {
                background: #f8fafc;
                border-color: #3b82f6;
                transform: scale(1.05);
            }
        }

        body.dark-mode .back-btn {
            background: rgba(30, 41, 59, 0.8);
            color: #60a5fa;
            border-color: rgba(96, 165, 250, 0.3);
        }

        body.dark-mode .back-btn:active {
            background: rgba(96, 165, 250, 0.15);
        }

        @media (hover: hover) {
            body.dark-mode .back-btn:hover {
                background: rgba(96, 165, 250, 0.2);
                border-color: #60a5fa;
                box-shadow: 0 4px 12px rgba(96, 165, 250, 0.3);
            }
        }

        /* Hero Section */
        .hero {
            background: #ffffff;
            color: #1f2937;
            padding: 4rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            display: none;
        }

        .hero::after {
            display: none;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(30px); }
        }

        .hero-content {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            animation: slideDown 0.8s ease-out;
        }

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

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 800;
            color: #1e3a8a;
            text-shadow: none;
        }

        .hero .accent-word {
            color: var(--accent-color);
        }

        body.dark-mode .hero .accent-word {
            color: var(--accent-color) !important;
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            opacity: 1;
            line-height: 1.8;
            color: #4b5563;
        }

        .gate-info {
            background: #ffffff;
            padding: 2rem;
            border-radius: 16px;
            margin: 2rem 0;
            border: 2px solid #e5e7eb;
            animation: slideUp 0.8s ease-out 0.2s both;
        }

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

        .gate-info h2 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
            color: #1e3a8a;
        }

        .gate-info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
            text-align: left;
        }

        .info-item {
            background: #eff6ff;
            padding: 1.25rem;
            border-radius: 12px;
            border-left: 4px solid #3b82f6;
        }

        .info-item h3 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: #1e40af;
            font-weight: 700;
        }

        .info-item p {
            font-size: 0.95rem;
            color: #374151;
            line-height: 1.5;
        }

        /* Search Bar */
        .search-container {
            max-width: 1400px;
            margin: -2rem auto 3rem;
            padding: 0 2rem;
            position: relative;
            z-index: 10;
            animation: slideUp 0.8s ease-out 0.3s both;
        }

        .search-bar {
            display: flex;
            gap: 0.5rem;
            background: #ffffff;
            padding: 1rem 1.5rem;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
            border: 2px solid transparent;
            background-image: linear-gradient(#ffffff, #ffffff), linear-gradient(90deg, #3b82f6, #06b6d4, #3b82f6);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            align-items: center;
            animation: searchBarGlow 3s ease-in-out infinite;
            position: relative;
        }

        html.dark .search-bar {
            background: #0f1a2e;
            background-image: linear-gradient(#0f1a2e, #0f1a2e), linear-gradient(90deg, #3b82f6, #06b6d4, #3b82f6);
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.5), 0 0 18px rgba(96, 165, 250, 0.2);
        }

        @keyframes searchBarGlow {
            0% {
                box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1), 0 0 20px rgba(59, 130, 246, 0.2);
            }
            50% {
                box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2), 0 0 30px rgba(6, 182, 212, 0.3);
            }
            100% {
                box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1), 0 0 20px rgba(59, 130, 246, 0.2);
            }
        }

        .search-input-wrapper {
            flex: 1;
            position: relative;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .search-icon {
            color: var(--secondary-color);
            font-size: 1.3rem;
        }

        html.dark .search-icon {
            color: #60a5fa;
        }

        .search-input {
            flex: 1;
            border: none;
            outline: none;
            font-size: 1rem;
            padding: 0.5rem;
            background: transparent;
            color: #1f2937;
            text-align: left;
            font-family: inherit;
        }

        .search-bar .search-input,
        .search-bar .search-input:focus,
        .search-bar .search-input:focus-visible,
        html.dark .search-bar .search-input,
        html.dark .search-bar .search-input:focus,
        html.dark .search-bar .search-input:focus-visible {
            border: none !important;
            outline: none !important;
            box-shadow: none !important;
            background: transparent !important;
        }

        .search-input::-webkit-outer-spin-button,
        .search-input::-webkit-inner-spin-button {
            -webkit-appearance: none;
            margin: 0;
        }

        @supports (-webkit-touch-callout: none) {
            .search-input {
                font-size: 16px;
            }
        }

        html.dark .search-input {
            color: #f1f5f9;
            background: transparent !important;
            border: none !important;
            box-shadow: none !important;
        }

        html.dark body .search-bar .search-input {
            background: transparent !important;
            border: none !important;
            box-shadow: none !important;
            -webkit-appearance: none;
            appearance: none;
        }

        .search-input::placeholder {
            color: #999;
            font-size: 0.85rem;
            text-align: left;
        }

        html.dark .search-input::placeholder {
            color: #94a3b8;
        }

        .clear-btn {
            background: none;
            border: none;
            cursor: pointer;
            color: #999;
            font-size: 1.2rem;
            padding: 0.5rem;
            transition: var(--transition);
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
        }

        .clear-btn:active {
            background: rgba(59, 130, 246, 0.1);
        }

        @media (hover: hover) {
            .clear-btn:hover {
                color: var(--primary-color);
            }
        }

        html.dark .clear-btn {
            color: #94a3b8;
        }

        @media (hover: hover) {
            html.dark .clear-btn:hover {
                color: #93c5fd;
            }
        }

        /* Main Content */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 3rem 2rem;
        }

        /* Section Headers */
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            animation: slideUp 0.8s ease-out 0.4s both;
        }

        .section-header h2 {
            font-size: 2.5rem;
            color: #1e3a8a;
            margin-bottom: 0.5rem;
            font-weight: 700;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
            border-radius: 2px;
        }

        .section-header p {
            color: #6b7280;
            font-size: 1.1rem;
            margin-top: 1rem;
            font-weight: 500;
        }

        /* Subject Cards Grid */
        .subjects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-bottom: 3rem;
        }

        .subject-card {
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 2px 6px rgba(59, 130, 246, 0.08);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            animation: scaleIn 0.5s ease-out forwards;
            opacity: 0;
            text-align: center;
            padding: 1.5rem 1.25rem;
            position: relative;
            border: 1px solid #f3f4f6;
            display: block;
            text-decoration: none;
            color: inherit;
            -webkit-user-select: none;
            user-select: none;
            -webkit-touch-callout: none;
        }

        @supports (-webkit-touch-callout: none) {
            .subject-card {
                padding: 1.5rem 1.25rem;
            }
        }

        .subject-card:active {
            transform: translateY(-3px);
            box-shadow: 0 6px 14px rgba(59, 130, 246, 0.12);
        }

        @media (hover: hover) {
            .subject-card:hover {
                transform: translateY(-6px);
                box-shadow: 0 8px 16px rgba(59, 130, 246, 0.15);
                border-color: #dbeafe;
            }
        }

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

        .subject-card:nth-child(1) { animation-delay: 0.5s; }
        .subject-card:nth-child(2) { animation-delay: 0.55s; }
        .subject-card:nth-child(3) { animation-delay: 0.6s; }
        .subject-card:nth-child(4) { animation-delay: 0.65s; }
        .subject-card:nth-child(5) { animation-delay: 0.7s; }
        .subject-card:nth-child(6) { animation-delay: 0.75s; }
        .subject-card:nth-child(n+7) { animation-delay: 0.8s; }

        .subject-icon {
            font-size: 2.4rem;
            margin-bottom: 0.65rem;
            display: inline-block;
            animation: floatRotate 4s ease-in-out infinite;
        }

        .subject-code-badge {
            display: inline-block;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--text-light);
            background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
            margin-bottom: 0.5rem;
        }

        .subject-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 0.4rem;
            line-height: 1.3;
        }

        .subject-meta {
            color: #6b7280;
            font-size: 0.8rem;
            margin-bottom: 0.75rem;
            font-weight: 500;
        }

        .subject-tags {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .subject-tag {
            background: #eff6ff;
            color: #1e40af;
            padding: 0.25rem 0.6rem;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 600;
            border: 1px solid #bfdbfe;
        }

        /* Dark theme adjustments for subject cards */
        body.dark-mode .subject-card {
            background: #0b1220; /* dark card background */
            border-color: #1f2937;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
            color: #e5e7eb;
        }

        body.dark-mode .subject-card:hover {
            border-color: #334155;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.6);
        }

        body.dark-mode .subject-card:active {
            box-shadow: 0 6px 14px rgba(0, 0, 0, 0.5);
        }

        body.dark-mode .subject-tag,
        body.dark-mode .subject-code-badge {
            background: #111827;
            color: #cbd5e1;
            border-color: #334155;
        }

        /* No Results */
        .no-results {
            text-align: center;
            padding: 3rem 2rem;
            opacity: 0;
            display: none;
            animation: slideUp 0.5s ease-out forwards;
        }

        .no-results.show {
            opacity: 1;
            display: block;
        }

        .no-results-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .no-results h3 {
            color: #1e3a8a;
            margin-bottom: 0.5rem;
            font-size: 1.3rem;
        }

        /* Filter Tags */
        .filter-tags {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }

        .filter-tag {
            background: #eff6ff;
            color: #1e40af;
            padding: 0.4rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid #bfdbfe;
            cursor: pointer;
            transition: var(--transition);
            min-height: 36px;
            display: flex;
            align-items: center;
            -webkit-user-select: none;
            user-select: none;
        }

        .filter-tag:active {
            transform: scale(0.98);
        }

        @media (hover: hover) {
            .filter-tag:hover {
                background: var(--primary-color);
                color: var(--text-light);
                border-color: var(--primary-color);
            }
        }

        /* Footer */
        footer {
            background: #ffffff !important;
            color: #3d5a80;
            text-align: center;
            padding: 2.5rem 2rem;
            margin-top: 3rem;
            border-top: 1px solid #e2e8f0;
        }

        footer p {
            margin: 0;
            line-height: 1.6;
            color: #5b7fa8;
        }

        footer .logo-brand {
            color: #3d5a80;
        }

        footer i {
            color: #3b82f6;
        }

        body.dark-mode footer {
            background: rgba(15, 23, 42, 0.8) !important;
            color: #cbd5e1;
            border-top-color: rgba(255, 255, 255, 0.1);
        }

        body.dark-mode footer p {
            color: #cbd5e1;
        }

        body.dark-mode footer .logo-brand {
            color: #f1f5f9;
        }

        /* Responsive - Tablet */
        @media (max-width: 768px) {
            * {
                -webkit-tap-highlight-color: transparent;
            }

            html, body {
                font-size: 16px;
            }

            nav {
                padding: 0.75rem 1rem;
            }

            .logo {
                font-size: 1.4rem;
                gap: 0.5rem;
            }

            .logo-icon {
                width: 40px;
                height: 40px;
            }

            .back-btn {
                padding: 10px 16px;
                font-size: 13px;
                min-height: 44px;
            }

            .hero {
                padding: 3rem 1.5rem;
            }

            .hero h1 {
                font-size: 2rem;
                margin-bottom: 1rem;
            }

            .hero p {
                font-size: 1.05rem;
                margin-bottom: 1.5rem;
            }

            .search-container {
                margin: -1.5rem auto 2rem;
                padding: 0 1.5rem;
            }

            .search-bar {
                padding: 0.85rem 1.2rem;
                gap: 0.5rem;
                min-height: 48px;
            }

            .search-icon {
                font-size: 1.2rem;
            }

            .search-input {
                font-size: 0.95rem;
            }

            .search-input::placeholder {
                font-size: 0.85rem;
            }

            .clear-btn {
                min-width: 44px;
                min-height: 44px;
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .section-header {
                margin-bottom: 2.5rem;
            }

            .section-header h2 {
                font-size: 1.8rem;
                margin-bottom: 0.75rem;
            }

            .section-header p {
                font-size: 1rem;
                margin-top: 0.75rem;
            }

            .subjects-grid {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
                gap: 1.2rem;
            }

            .subject-card {
                padding: 1.2rem 1rem;
                min-height: 200px;
                display: flex;
                flex-direction: column;
                justify-content: center;
            }

            .subject-icon {
                font-size: 2.2rem;
                margin-bottom: 0.7rem;
            }

            .subject-code-badge {
                padding: 0.3rem 0.8rem;
                font-size: 0.75rem;
                margin-bottom: 0.6rem;
            }

            .subject-title {
                font-size: 0.85rem;
                margin-bottom: 0.5rem;
            }

            .subject-meta {
                font-size: 0.7rem;
                margin-bottom: 0.6rem;
            }

            .subject-tag {
                padding: 0.3rem 0.7rem;
                font-size: 0.75rem;
            }

            .gate-info {
                padding: 1.5rem;
                margin: 2rem 0;
                border-radius: 12px;
            }

            .gate-info h2 {
                font-size: 1.5rem;
                margin-bottom: 1rem;
            }

            .gate-info p {
                font-size: 0.95rem;
                line-height: 1.6;
            }

            .gate-info-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
                margin-top: 1.5rem;
            }

            .info-item {
                padding: 1.2rem;
                border-left-width: 4px;
            }

            .info-item h3 {
                font-size: 1rem;
                margin-bottom: 0.6rem;
            }

            .info-item p {
                font-size: 0.9rem;
                line-height: 1.5;
            }

            .view-toggle-container {
                margin-bottom: 2rem;
                gap: 0.75rem;
            }

            .view-toggle-btn {
                padding: 0.7rem 1.2rem;
                font-size: 0.9rem;
                min-height: 44px;
                flex: 1;
            }

            .subjects-links-grid {
                grid-template-columns: 1fr;
                gap: 0.9rem;
            }

            .subject-link {
                padding: 1rem;
                min-height: 48px;
                gap: 1rem;
            }

            .subject-link-icon {
                width: 40px;
                height: 40px;
                font-size: 0.85rem;
            }

            .subject-link-title {
                font-size: 0.9rem;
            }

            .subject-link-code {
                font-size: 0.7rem;
            }

            .subject-link-arrow {
                font-size: 1.1rem;
            }

            footer {
                padding: 2rem 1.5rem;
            }

            footer p {
                font-size: 0.95rem;
            }

            .container {
                padding: 2rem 1.5rem;
            }
        }

        /* Responsive - Mobile */
        @media (max-width: 480px) {
            html, body {
                font-size: 14px;
            }

            nav {
                padding: 0.75rem 1rem;
                box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
            }

            .nav-container {
                gap: 0.5rem;
            }

            .logo {
                font-size: 1.1rem;
                gap: 0.4rem;
            }

            .logo-icon {
                width: 38px;
                height: 38px;
            }

            .logo-text {
                gap: 0.08rem;
                flex-shrink: 1;
            }

            .logo-title {
                font-size: 1rem;
                line-height: 1;
            }

            .logo-subtitle {
                font-size: 0.65rem;
                opacity: 0.85;
            }

            .back-btn {
                padding: 10px 14px;
                font-size: 12px;
                border: 1.5px solid #3b82f6;
                min-height: 44px;
                white-space: nowrap;
            }

            .hero {
                padding: 2.5rem 1rem;
            }

            .hero h1 {
                font-size: 1.4rem;
                line-height: 1.2;
                margin-bottom: 0.8rem;
            }

            .hero p {
                font-size: 0.95rem;
                line-height: 1.5;
                margin-bottom: 1.2rem;
            }

            .search-container {
                margin: -1.2rem auto 1.5rem;
                padding: 0 1rem;
            }

            .search-bar {
                padding: 0.75rem 1rem;
                gap: 0.4rem;
                min-height: 48px;
                border-radius: 10px;
            }

            .search-icon {
                font-size: 1.1rem;
                flex-shrink: 0;
            }

            .search-input {
                font-size: 0.9rem;
            }

            .search-input::placeholder {
                font-size: 0.8rem;
            }

            .clear-btn {
                min-width: 44px;
                min-height: 44px;
                font-size: 1.1rem;
                padding: 0;
            }

            .container {
                padding: 1.5rem 1rem;
            }

            .section-header {
                margin-bottom: 2rem;
            }

            .section-header h2 {
                font-size: 1.5rem;
                margin-bottom: 0.6rem;
            }

            .section-header p {
                font-size: 0.9rem;
                margin-top: 0.6rem;
            }

            .subjects-grid {
                grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
                gap: 0.8rem;
            }

            .subject-card {
                padding: 1rem 0.7rem;
                min-height: 180px;
                border-radius: 14px;
            }

            .subject-icon {
                font-size: 1.9rem;
                margin-bottom: 0.5rem;
            }

            .subject-code-badge {
                padding: 0.25rem 0.6rem;
                font-size: 0.65rem;
                margin-bottom: 0.5rem;
            }

            .subject-title {
                font-size: 0.75rem;
                margin-bottom: 0.35rem;
            }

            .subject-meta {
                font-size: 0.65rem;
                margin-bottom: 0.5rem;
            }

            .subject-tag {
                padding: 0.2rem 0.5rem;
                font-size: 0.6rem;
            }

            .gate-info {
                padding: 1.25rem 1rem;
                margin: 1.5rem 0;
                border-radius: 12px;
            }

            .gate-info h2 {
                font-size: 1.3rem;
                margin-bottom: 0.8rem;
            }

            .gate-info p {
                font-size: 0.9rem;
                line-height: 1.5;
                margin-top: 0.8rem;
            }

            .gate-info-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
                margin-top: 1.2rem;
            }

            .info-item {
                padding: 1rem;
                border-left-width: 3px;
                border-radius: 10px;
            }

            .info-item h3 {
                font-size: 0.95rem;
                margin-bottom: 0.5rem;
            }

            .info-item p {
                font-size: 0.85rem;
                line-height: 1.4;
            }

            .modal-content {
                max-height: 70vh;
                padding: 1rem;
                border-radius: 20px 20px 0 0;
            }

            .modal-header {
                margin-bottom: 1.2rem;
                padding-bottom: 1rem;
            }

            .modal-title {
                font-size: 1.2rem;
            }

            .modal-close {
                font-size: 1.4rem;
                min-width: 44px;
                min-height: 44px;
                width: 44px;
                height: 44px;
            }

            .modal-subject-info {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
                padding: 1.2rem 1rem;
                margin-bottom: 1.5rem;
                border-radius: 12px;
            }

            .modal-subject-icon {
                font-size: 2.8rem;
            }

            .modal-subject-details h2 {
                font-size: 1.3rem;
                margin-bottom: 0.6rem;
            }

            .modal-subject-code {
                padding: 0.3rem 0.7rem;
                font-size: 0.65rem;
            }

            .modal-subject-details p {
                font-size: 0.85rem;
            }

            .pyq-list {
                grid-template-columns: 1fr;
                gap: 0.9rem;
            }

            .pyq-item {
                padding: 1rem;
                border-radius: 10px;
            }

            .pyq-item-icon {
                font-size: 2rem;
                margin-bottom: 0.6rem;
            }

            .pyq-item-name {
                font-size: 0.85rem;
                margin-bottom: 0.4rem;
            }

            .pyq-item-action {
                font-size: 0.75rem;
            }

            .pyq-actions {
                gap: 0.5rem;
                margin-top: 0.7rem;
            }

            .pyq-link {
                padding: 0.4rem 0.75rem;
                font-size: 0.75rem;
                min-height: 36px;
                min-width: 36px;
            }

            .view-toggle-container {
                gap: 0.5rem;
                margin-bottom: 1.5rem;
            }

            .view-toggle-btn {
                padding: 0.65rem 1rem;
                font-size: 0.85rem;
                min-height: 44px;
                flex: 1;
                border-radius: 8px;
            }

            .subjects-links-grid {
                grid-template-columns: 1fr;
                gap: 0.8rem;
            }

            .subject-link {
                padding: 0.9rem;
                min-height: 48px;
                gap: 0.8rem;
                border-radius: 10px;
            }

            .subject-link-icon {
                width: 36px;
                height: 36px;
                font-size: 0.8rem;
            }

            .subject-link-title {
                font-size: 0.85rem;
            }

            .subject-link-code {
                font-size: 0.65rem;
            }

            .subject-link-arrow {
                font-size: 1rem;
            }

            footer {
                padding: 1.5rem 1rem;
                margin-top: 2rem;
            }

            footer p {
                font-size: 0.85rem;
                line-height: 1.5;
            }

            .loading {
                width: 18px;
                height: 18px;
            }
        }

        /* Loading Animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f3f3;
            border-top: 3px solid var(--secondary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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

        /* Highlight Active Search */
        .subject-card.hidden {
            display: none;
        }

        .subject-card.match {
            animation: pulse 0.6s ease-out;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.02); }
            100% { transform: scale(1); }
        }

        @keyframes floatRotate {
            0%, 100% {
                transform: translateY(0px) rotate(0deg);
            }
            25% {
                transform: translateY(-12px) rotate(4deg);
            }
            50% {
                transform: translateY(-6px) rotate(-3deg);
            }
            75% {
                transform: translateY(-10px) rotate(3deg);
            }
        }

        /* Modal Styles */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
            z-index: 50;
        }

        .modal-overlay.active {
            opacity: 1;
            pointer-events: auto;
            backdrop-filter: blur(5px);
        }

        .modal-content {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            max-height: 80vh;
            transform: translateY(100%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 60;
            overflow-y: auto;
            background: #ffffff;
            border-radius: 24px 24px 0 0;
            padding: 2rem;
        }

        .modal-content.active {
            transform: translateY(0);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .modal-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0f172a;
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 2rem;
            color: #0f172a;
            cursor: pointer;
            transition: var(--transition);
            padding: 0;
            min-width: 48px;
            min-height: 48px;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            -webkit-user-select: none;
            user-select: none;
        }

        .modal-close:active {
            background: rgba(15, 23, 42, 0.08);
            transform: scale(0.95);
        }

        @media (hover: hover) {
            .modal-close:hover {
                transform: scale(1.1);
                color: var(--accent-color);
                background: rgba(15, 23, 42, 0.05);
            }
        }

        .modal-subject-info {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin-bottom: 2rem;
            padding: 1.5rem;
            background: #f1f5f9;
            border-radius: 16px;
            border-left: 4px solid #06b6d4;
        }

        .modal-subject-icon {
            font-size: 3.5rem;
            animation: floatRotate 4s ease-in-out infinite;
        }

        .modal-subject-details h2 {
            font-size: 1.8rem;
            color: #0f172a;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .modal-subject-code {
            display: inline-block;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-light);
            background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
        }

        .modal-subject-details p {
            color: #475569;
            font-size: 0.95rem;
        }

        .pyq-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .pyq-item {
            padding: 1.5rem;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fadeInUp 0.4s ease-out forwards;
            opacity: 0;
            -webkit-user-select: none;
            user-select: none;
        }

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

        .pyq-item:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
        }

        @media (hover: hover) {
            .pyq-item:hover {
                background: #f8fafc;
                border-color: #06b6d4;
                transform: translateY(-4px);
                box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
            }
        }

        .pyq-item-icon {
            font-size: 2.5rem;
            margin-bottom: 0.75rem;
        }

        .pyq-item-name {
            color: #0f172a;
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 0.5rem;
        }

        html.dark .modal-content {
            background: #1e293b;
        }

        html.dark .modal-title,
        html.dark .modal-close,
        html.dark .modal-subject-details h2,
        html.dark .pyq-item-name {
            color: var(--text-light);
        }

        html.dark .modal-subject-info {
            background: rgba(59, 130, 246, 0.08);
        }

        html.dark .modal-subject-details p {
            color: #9ca3af;
        }

        html.dark .pyq-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        html.dark .pyq-item:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .pyq-item-action {
            color: var(--accent-color);
            font-size: 0.85rem;
            opacity: 0.8;
            transition: opacity 0.3s ease;
        }

        .pyq-item:hover .pyq-item-action {
            opacity: 1;
        }

        .pyq-actions {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            margin-top: 0.75rem;
        }

        .pyq-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.8rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #0f172a;
            background: #e2e8f0;
            text-decoration: none;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
            min-height: 36px;
            min-width: 36px;
            border: none;
            cursor: pointer;
            -webkit-user-select: none;
            user-select: none;
        }

        .pyq-link:active:not(.disabled) {
            transform: translateY(0px) scale(0.97);
        }

        @media (hover: hover) {
            .pyq-link:hover:not(.disabled) {
                transform: translateY(-1px);
                box-shadow: 0 6px 12px rgba(6, 182, 212, 0.25);
            }
        }

        .pyq-link.secondary {
            background: rgba(6, 182, 212, 0.18);
            color: #67e8f9;
        }

        html.dark .pyq-link {
            background: rgba(6, 182, 212, 0.18);
            color: #67e8f9;
        }

        .pyq-link.disabled {
            pointer-events: none;
            opacity: 0.5;
        }

        .scroll-container {
            overflow-y: auto;
        }

        .scroll-container::-webkit-scrollbar {
            width: 8px;
        }

        .scroll-container::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
        }

        .scroll-container::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 10px;
        }

        .scroll-container::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        /* Mobile Modal Adjustments */
        @media (max-width: 768px) {
            .modal-content {
                max-height: 70vh;
                padding: 1.25rem;
                border-radius: 20px 20px 0 0;
            }

            .modal-header {
                margin-bottom: 1.25rem;
                padding-bottom: 1rem;
            }

            .modal-title {
                font-size: 1.2rem;
            }

            .modal-close {
                font-size: 1.5rem;
                width: 40px;
                height: 40px;
            }

            .modal-subject-info {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
                padding: 1rem;
                margin-bottom: 1.5rem;
            }

            .modal-subject-icon {
                font-size: 2.8rem;
            }

            .modal-subject-details h2 {
                font-size: 1.4rem;
                flex-direction: column;
                gap: 0.5rem;
            }

            .modal-subject-details p {
                font-size: 0.85rem;
            }

            .pyq-list {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .pyq-item {
                padding: 1rem;
            }

            .pyq-item-icon {
                font-size: 2rem;
                margin-bottom: 0.5rem;
            }

            .pyq-item-name {
                font-size: 0.9rem;
                margin-bottom: 0.35rem;
            }

            .pyq-item-action {
                font-size: 0.75rem;
            }
        }

        @media (max-width: 480px) {
            .search-bar {
                padding: 0.6rem 0.8rem;
                gap: 0.25rem;
            }

            .search-input {
                font-size: 0.85rem;
            }

            .search-input::placeholder {
                font-size: 0.7rem;
            }

            .modal-content {
                max-height: 65vh;
                padding: 1rem;
            }

            .modal-header {
                margin-bottom: 1rem;
                padding-bottom: 0.75rem;
            }

            .modal-title {
                font-size: 1rem;
            }

            .modal-close {
                font-size: 1.3rem;
                width: 35px;
                height: 35px;
            }

            .modal-subject-info {
                padding: 0.75rem;
                margin-bottom: 1rem;
                border-radius: 12px;
            }

            .modal-subject-icon {
                font-size: 2.4rem;
            }

            .modal-subject-details h2 {
                font-size: 1.1rem;
            }

            .modal-subject-code {
                padding: 0.25rem 0.6rem;
                font-size: 0.65rem;
            }

            .modal-subject-details p {
                font-size: 0.75rem;
            }

            .pyq-list {
                gap: 0.75rem;
            }

            .pyq-item {
                padding: 0.85rem;
            }

            .pyq-item-icon {
                font-size: 1.8rem;
                margin-bottom: 0.4rem;
            }

            .pyq-item-name {
                font-size: 0.8rem;
                margin-bottom: 0.25rem;
            }

            .pyq-item-action {
                font-size: 0.7rem;
            }
        }

        /* View Toggle Container */
        .view-toggle-container {
            display: flex;
            gap: 1rem;
            margin-bottom: 2.5rem;
            justify-content: center;
            animation: slideUp 0.8s ease-out 0.45s both;
        }

        .view-toggle-btn {
            padding: 0.75rem 1.5rem;
            border: 2px solid #e5e7eb;
            background: #ffffff;
            color: #1e3a8a;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            min-height: 44px;
            -webkit-user-select: none;
            user-select: none;
        }

        .view-toggle-btn.active {
            background: #1e3a8a;
            color: #ffffff;
            border-color: #1e3a8a;
            box-shadow: 0 4px 12px rgba(30, 58, 138, 0.2);
        }

        .view-toggle-btn:active:not(.active) {
            transform: scale(0.97);
        }

        @media (hover: hover) {
            .view-toggle-btn:hover:not(.active) {
                border-color: #1e3a8a;
                background: #f9fafb;
            }
        }

        /* View Sections */
        .view-section {
            display: none;
            animation: fadeIn 0.5s ease-out;
        }

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

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

        /* Subjects by Stream */
        .subjects-by-stream {
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
        }

        .stream-section {
            animation: slideUp 0.6s ease-out forwards;
            opacity: 0;
        }

        .stream-section:nth-child(1) { animation-delay: 0.2s; }
        .stream-section:nth-child(2) { animation-delay: 0.3s; }
        .stream-section:nth-child(3) { animation-delay: 0.4s; }

        .stream-title {
            font-size: 1.5rem;
            color: #1e3a8a;
            margin-bottom: 1.5rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }

        .stream-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-color), transparent);
            border-radius: 2px;
        }

        /* Subjects Links Grid */
        .subjects-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
        }

        .subject-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1rem;
            background: #ffffff;
            border: 2px solid #e5e7eb;
            border-radius: 10px;
            text-decoration: none;
            color: #1f2937;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            cursor: pointer;
            font-weight: 500;
            min-height: 48px;
            -webkit-user-select: none;
            user-select: none;
        }

        .subject-link::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.15), transparent);
            transition: var(--transition);
        }

        .subject-link:active {
            transform: scale(0.98);
        }

        @media (hover: hover) {
            .subject-link:hover::before {
                left: 100%;
            }

            .subject-link:hover {
                border-color: #1e3a8a;
                background: #f9fafb;
                transform: translateY(-2px);
                box-shadow: 0 6px 16px rgba(30, 58, 138, 0.12);
            }
        }

        .subject-link-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
            color: #ffffff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .subject-link-name {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
        }

        .subject-link-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #1f2937;
        }

        .subject-link-code {
            font-size: 0.75rem;
            color: var(--accent-color);
            font-weight: 700;
            text-transform: uppercase;
        }

        .subject-link-arrow {
            color: #1e3a8a;
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .subject-link:hover .subject-link-arrow {
            transform: translateX(4px);
        }

        /* Search highlight in links view */
        .subject-link.hidden {
            display: none;
        }

        .stream-section.empty-stream {
            display: none;
        }

        /* Focus states for accessibility */
        button:focus-visible,
        a:focus-visible,
        .subject-card:focus-visible,
        .filter-tag:focus-visible,
        .view-toggle-btn:focus-visible,
        .subject-link:focus-visible,
        .pyq-link:focus-visible {
            outline: 2px solid #3b82f6;
            outline-offset: 2px;
        }

        .search-input:focus-visible {
            outline: none;
        }

        @media (min-width: 769px) {
            .view-toggle-container {
                display: flex;
            }

            .subjects-links-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            }
        }

        /* Mobile optimization for no-hover devices */
        @media (hover: none) and (pointer: coarse) {
            .subject-card {
                box-shadow: 0 1px 3px rgba(59, 130, 246, 0.1);
            }

            .search-bar {
                box-shadow: 0 1px 4px rgba(59, 130, 246, 0.1);
            }

            .pyq-item {
                border: 1px solid #e2e8f0;
            }

            .subject-link {
                border: 2px solid #e5e7eb;
            }

            button, .filter-tag, .view-toggle-btn {
                -webkit-appearance: none;
                appearance: none;
            }
        }

        /* High DPI screens */
        @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
            .subject-card,
            .pyq-item,
            .search-bar {
                border: 0.5px solid #e5e7eb;
            }
        }

        /* Landscape mode adjustments */
        @media (max-height: 500px) {
            nav {
                padding: 0.5rem 1rem;
            }

            .hero {
                padding: 1.5rem 1rem;
            }

            .hero h1 {
                font-size: 1.3rem;
                margin-bottom: 0.5rem;
            }

            .search-container {
                margin: -0.8rem auto 1rem;
            }

            .gate-info {
                margin: 1rem 0;
                padding: 1rem;
            }
        }