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

        :root {
            --bg-primary: #0a0a0f;
            --bg-secondary: #12121a;
            --bg-tertiary: #1a1a2e;
            --bg-card: #16162a;
            --cyan: #00e5ff;
            --cyan-hover: #00c8e0;
            --cyan-glow: rgba(0, 229, 255, 0.15);
            --cyan-glow-strong: rgba(0, 229, 255, 0.3);
            --text-primary: #ffffff;
            --text-secondary: #a0a0b8;
            --text-muted: #6b6b80;
            --border-color: #2a2a40;
            --border-hover: #3a3a55;
            --success: #00e676;
            --purple: #a78bfa;
            --purple-glow: rgba(167, 139, 250, 0.15);
            --orange: #fb923c;
            --pink: #f472b6;
            --green: #34d399;
            --sky: #38bdf8;
            --red: #ef4444;
            --red-glow: rgba(239, 68, 68, 0.15);
            --red-glow-strong: rgba(239, 68, 68, 0.3);
            --gold: #f59e0b;
            --gold-glow: rgba(245, 158, 11, 0.15);
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Header */
        .header {
            background: rgba(18, 18, 26, 0.85);
            border-bottom: 1px solid var(--border-color);
            padding: 0 2rem;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--cyan);
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .logo svg {
            width: 28px;
            height: 28px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--cyan);
        }

        .nav-links a.active {
            color: var(--cyan);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -20px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--cyan);
            border-radius: 1px;
        }

        .user-section {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .user-greeting {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .user-greeting strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .user-avatar {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--cyan), var(--purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            color: #000;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .user-avatar:hover {
            transform: scale(1.1);
            box-shadow: 0 0 15px var(--cyan-glow-strong);
        }

        .btn-logout {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 0.4rem 1rem;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Inter', sans-serif;
        }

        .btn-logout:hover {
            border-color: var(--cyan);
            color: var(--cyan);
            background: var(--cyan-glow);
        }

        /* Hero Section */
        .hero {
            text-align: center;
            padding: 4rem 2rem 3rem;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--cyan-glow);
            border: 1px solid rgba(0, 229, 255, 0.2);
            color: var(--cyan);
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .hero-badge .pulse-dot {
            width: 8px;
            height: 8px;
            background: var(--cyan);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: -1.5px;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #ffffff 0%, #a0a0b8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero h1 span {
            -webkit-text-fill-color: var(--cyan);
            background: none;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--cyan);
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Filter Bar */
        .filter-bar {
            max-width: 1200px;
            margin: 0 auto 2rem;
            padding: 0 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }

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

        .filter-tag {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 0.45rem 1rem;
            border-radius: 8px;
            font-size: 0.8rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Inter', sans-serif;
        }

        .filter-tag:hover, .filter-tag.active {
            border-color: var(--cyan);
            color: var(--cyan);
            background: var(--cyan-glow);
        }

        .results-count {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .results-count strong {
            color: var(--cyan);
        }

        /* Course Grid */
        .course-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem 4rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
            gap: 1.5rem;
        }

        /* Course Card */
        .course-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.4s ease;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .course-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px var(--cyan-glow);
        }

        .course-card-image {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .course-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .course-card:hover .course-card-image img {
            transform: scale(1.05);
        }

        .course-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 10, 15, 0.95) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 1.2rem;
        }

        .course-category {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0.7rem;
            border-radius: 6px;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            width: fit-content;
            margin-bottom: 0.5rem;
        }

        .category-marketing { background: rgba(0, 229, 255, 0.15); color: var(--cyan); }
        .category-design { background: rgba(167, 139, 250, 0.15); color: var(--purple); }
        .category-email { background: rgba(52, 211, 153, 0.15); color: var(--green); }
        .category-infoproducts { background: rgba(244, 114, 182, 0.15); color: var(--pink); }
        .category-trading { background: rgba(251, 146, 60, 0.15); color: var(--orange); }
        .category-language { background: rgba(56, 189, 248, 0.15); color: var(--sky); }
        .category-mind { background: rgba(239, 68, 68, 0.15); color: var(--red); }

        .course-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: rgba(10, 10, 15, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            padding: 0.3rem 0.7rem;
            border-radius: 6px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .course-card-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            flex: 1;
        }

        .course-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.3px;
            color: var(--text-primary);
        }

        .course-card-description {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .course-card-features {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .feature-tag {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .feature-tag svg {
            width: 14px;
            height: 14px;
            opacity: 0.6;
        }

        .course-card-footer {
            padding: 1.2rem 1.5rem;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .course-price {
            display: flex;
            flex-direction: column;
        }

        .price-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .price-value {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--cyan);
        }

        .price-value .currency {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        .btn-course-info {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--cyan);
            color: #000;
            border: none;
            padding: 0.65rem 1.3rem;
            border-radius: 10px;
            font-size: 0.85rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            font-family: 'Inter', sans-serif;
            white-space: nowrap;
        }

        .btn-course-info:hover {
            background: var(--cyan-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px var(--cyan-glow-strong);
        }

        .btn-course-info svg {
            width: 16px;
            height: 16px;
            transition: transform 0.3s ease;
        }

        .btn-course-info:hover svg {
            transform: translateX(3px);
        }

        /* Featured Card */
        .course-card.featured {
            grid-column: span 2;
            flex-direction: row;
        }

        .course-card.featured .course-card-image {
            width: 50%;
            aspect-ratio: auto;
            min-height: 300px;
        }

        .course-card.featured .course-card-body {
            padding: 2rem;
            justify-content: center;
        }

        .course-card.featured .course-card-title {
            font-size: 1.5rem;
        }

        .course-card.featured .course-card-description {
            -webkit-line-clamp: 4;
        }

        .featured-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: linear-gradient(135deg, var(--cyan), var(--purple));
            color: #000;
            padding: 0.25rem 0.7rem;
            border-radius: 6px;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            width: fit-content;
            margin-bottom: 0.8rem;
        }

        /* Mind Card Special */
        .course-card.mind-special {
            border: 1px solid rgba(239, 68, 68, 0.3);
            background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(239, 68, 68, 0.05) 100%);
        }

        .course-card.mind-special:hover {
            border-color: var(--red);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px var(--red-glow-strong);
        }

        .course-card.mind-special .btn-course-info {
            background: var(--red);
        }

        .course-card.mind-special .btn-course-info:hover {
            background: #dc2626;
            box-shadow: 0 4px 15px var(--red-glow-strong);
        }

        .mind-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: linear-gradient(135deg, var(--red), var(--purple));
            color: #fff;
            padding: 0.25rem 0.7rem;
            border-radius: 6px;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            width: fit-content;
            margin-bottom: 0.8rem;
        }

        /* CTA Section */
        .cta-section {
            max-width: 1200px;
            margin: 0 auto 4rem;
            padding: 0 2rem;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 500px;
            margin: 0 auto 1.5rem;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-cta-primary {
            background: var(--cyan);
            color: #000;
            border: none;
            padding: 0.85rem 2rem;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Inter', sans-serif;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-cta-primary:hover {
            background: var(--cyan-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 25px var(--cyan-glow-strong);
        }

        .btn-cta-secondary {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            padding: 0.85rem 2rem;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Inter', sans-serif;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-cta-secondary:hover {
            border-color: var(--cyan);
            color: var(--cyan);
            background: var(--cyan-glow);
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 3rem 2rem 1.5rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-brand .logo {
            margin-bottom: 1rem;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 280px;
        }

        .footer-column h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .footer-column ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-column a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.3s ease;
        }

        .footer-column a:hover {
            color: var(--cyan);
        }

        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-social {
            display: flex;
            gap: 0.8rem;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .footer-social a:hover {
            border-color: var(--cyan);
            color: var(--cyan);
            background: var(--cyan-glow);
        }

        .footer-social svg {
            width: 16px;
            height: 16px;
        }

        /* Search bar */
        .search-container {
            max-width: 1200px;
            margin: 0 auto 1.5rem;
            padding: 0 2rem;
        }

        .search-bar {
            display: flex;
            align-items: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 0.5rem 1rem;
            gap: 0.8rem;
            transition: all 0.3s ease;
        }

        .search-bar:focus-within {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px var(--cyan-glow);
        }

        .search-bar svg {
            width: 18px;
            height: 18px;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .search-bar input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 0.9rem;
            font-family: 'Inter', sans-serif;
        }

        .search-bar input::placeholder {
            color: var(--text-muted);
        }

        /* Toast Notification */
        .toast {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: var(--bg-secondary);
            border: 1px solid var(--cyan);
            border-radius: 12px;
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            box-shadow: 0 8px 30px rgba(0, 229, 255, 0.15);
            transform: translateY(100px);
            opacity: 0;
            transition: all 0.4s ease;
            z-index: 200;
        }

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

        .toast-icon {
            width: 24px;
            height: 24px;
            color: var(--cyan);
        }

        .toast-text {
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
        }

        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }
        .delay-5 { animation-delay: 0.5s; }
        .delay-6 { animation-delay: 0.6s; }
        .delay-7 { animation-delay: 0.7s; }
        .delay-8 { animation-delay: 0.8s; }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--border-hover);
        }

        /* Mobile menu */
        .mobile-menu-btn {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.5rem;
        }

        .mobile-menu-btn svg {
            width: 24px;
            height: 24px;
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .course-card.featured {
                grid-column: span 1;
                flex-direction: column;
            }

            .course-card.featured .course-card-image {
                width: 100%;
                aspect-ratio: 16/9;
                min-height: auto;
            }

            .course-card.featured .course-card-body {
                padding: 1.5rem;
            }

            .course-card.featured .course-card-title {
                font-size: 1.15rem;
            }

            .course-card.featured .course-card-description {
                -webkit-line-clamp: 2;
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header {
                padding: 0 1rem;
            }

            .nav-links {
                display: none;
            }

            .user-greeting {
                display: none;
            }

            .hero {
                padding: 3rem 1.5rem 2rem;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero-stats {
                gap: 2rem;
            }

            .filter-bar {
                padding: 0 1rem;
            }

            .search-container {
                padding: 0 1rem;
            }

            .course-grid {
                grid-template-columns: 1fr;
                padding: 0 1rem 3rem;
            }

            .course-card-footer {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-course-info {
                justify-content: center;
            }

            .cta-box {
                padding: 2rem 1.5rem;
            }

            .cta-box h2 {
                font-size: 1.5rem;
            }

            .footer-content {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }