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

        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #8b5cf6;
            --accent: #ec4899;
            --bg-main: #0f172a;
            --bg-card: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --border: #334155;
        }

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

        /* Elementos flotantes decorativos */
        .floating-element {
            position: fixed;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
            pointer-events: none;
            z-index: 0;
            animation: float 20s infinite ease-in-out;
        }

        .floating-element:nth-child(1) {
            width: 300px;
            height: 300px;
            top: -100px;
            right: -100px;
            animation-delay: 0s;
        }

        .floating-element:nth-child(2) {
            width: 200px;
            height: 200px;
            bottom: -50px;
            left: -50px;
            animation-delay: 5s;
        }

        .floating-element:nth-child(3) {
            width: 150px;
            height: 150px;
            top: 50%;
            right: 10%;
            animation-delay: 10s;
        }

        .floating-element:nth-child(4) {
            width: 250px;
            height: 250px;
            bottom: 20%;
            right: -80px;
            animation-delay: 15s;
        }

        .floating-element:nth-child(5) {
            width: 180px;
            height: 180px;
            top: 30%;
            left: 5%;
            animation-delay: 8s;
        }

        @keyframes float {
            0%, 100% {
                transform: translate(0, 0) scale(1);
                opacity: 0.3;
            }
            33% {
                transform: translate(30px, -30px) scale(1.1);
                opacity: 0.5;
            }
            66% {
                transform: translate(-20px, 20px) scale(0.9);
                opacity: 0.4;
            }
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
            position: relative;
            z-index: 1;
        }

        /* Header Hero */
        .hero {
            text-align: center;
            padding: 6rem 2rem 4rem;
            margin-bottom: 4rem;
        }

        .hero h1 {
            font-size: 4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1.5rem;
            animation: fadeInUp 0.8s ease-out;
        }

        .hero p {
            font-size: 1.4rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            animation: fadeInUp 0.8s ease-out 0.2s backwards;
        }

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

        /* Sección de contenido */
        .course-content {
            margin-bottom: 6rem;
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        /* Cards Container */
        .cards-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
            padding: 1rem;
        }

        /* Card Styles */
        .card {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 2.5rem;
            position: relative;
            overflow: hidden;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid var(--border);
            opacity: 0;
            transform: translateY(30px);
            animation: cardFadeIn 0.6s ease-out forwards;
        }

        .card:nth-child(1) { animation-delay: 0.1s; }
        .card:nth-child(2) { animation-delay: 0.2s; }
        .card:nth-child(3) { animation-delay: 0.3s; }
        .card:nth-child(4) { animation-delay: 0.4s; }
        .card:nth-child(5) { animation-delay: 0.5s; }
        .card:nth-child(6) { animation-delay: 0.6s; }

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

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .card:hover::before {
            transform: scaleX(1);
        }

        .card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), 
                        rgba(99, 102, 241, 0.1) 0%, 
                        transparent 50%);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .card:hover::after {
            opacity: 1;
        }

        .card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
            box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
        }

        .card-icon {
            width: 70px;
            height: 70px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 2rem;
            color: white;
            transition: all 0.4s ease;
            position: relative;
            z-index: 2;
        }

        .card:hover .card-icon {
            transform: scale(1.1) rotate(5deg);
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.5);
        }

        .card-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            position: relative;
            z-index: 2;
            transition: color 0.3s;
        }

        .card:hover .card-title {
            color: var(--primary);
        }

        .card-content {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
            position: relative;
            z-index: 2;
        }

        /* Footer */
        footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 3rem 2rem;
            margin-top: 6rem;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            text-align: center;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .social-link {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--bg-main);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 1.3rem;
            transition: all 0.3s ease;
        }

        .social-link:hover {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-color: var(--primary);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
        }

        .copyright {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 2rem;
            }

            .cards-container {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .card {
                padding: 2rem;
            }
        }

        /* Efecto de mouse tracking */
        @media (hover: hover) {
            .card {
                position: relative;
            }
        }

        /* Scroll reveal */
        .reveal {
            opacity: 0;
            transform: translateY(50px);
            transition: all 0.8s ease;
        }

        .reveal.active {
            opacity: 1;
            transform: translateY(0);
        }