<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Styles */
        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            animation: slideDown 0.8s ease-out;
            margin-bottom: 200px;
        }

        @keyframes slideDown {
            from { transform: translateY(-100%); }
            to { transform: translateY(0); }
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: #764ba2;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: #764ba2;
            transform: translateY(-2px);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #764ba2;
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff10" points="0,0 1000,300 1000,1000 0,700"/></svg>');
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
        }

        .hero-content {
            z-index: 2;
            animation: fadeInUp 1s ease-out 0.5s both;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .cta-button {
            display: inline-block;
            padding: 15px 30px;
            background: linear-gradient(45deg, #ff6b6b, #ee5a24);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* Section Styles */
        .section {
            padding: 100px 0;
            margin: 150px 50px 0;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            animation: fadeIn 0.8s ease-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: #764ba2;
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: linear-gradient(45deg, #ff6b6b, #ee5a24);
            border-radius: 2px;
        }

        .section-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        /* Media Players */
        .media-player {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .media-player:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .media-player h3 {
            margin-bottom: 1rem;
            color: #333;
            font-size: 1.3rem;
        }

        .video-container, .audio-container {
            width: 100%;
            margin-bottom: 1rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .video-player {
            width: 100%;
            height: 200px;
            background: #000;
            border-radius: 10px;
        }

        .audio-player {
            width: 100%;
            height: 60px;
            background: #f1f3f4;
        }

        .file-path-info {
            background: #e9ecef;
            padding: 0.8rem;
            border-radius: 8px;
            font-size: 0.9rem;
            color: #495057;
            margin-top: 0.5rem;
            border-left: 4px solid #764ba2;
        }

        .file-path-info strong {
            color: #764ba2;
        }

        /* Quiz Styles */
        .quiz-container {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            margin-top: 2rem;
        }

        .quiz-button {
            background: linear-gradient(45deg, #28a745, #20c997);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 25px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
        }

        .quiz-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
        }

        .quiz-content {
            display: none;
            margin-top: 2rem;
        }

        .quiz-content.active {
            display: block;
            animation: slideIn 0.5s ease-out;
        }

        @keyframes slideIn {
            from { opacity: 0; transform: translateX(-20px); }
            to { opacity: 1; transform: translateX(0); }
        }

        .question {
            margin-bottom: 2rem;
            padding: 1.5rem;
            background: white;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .question h4 {
            margin-bottom: 1rem;
            color: #333;
            font-size: 1.2rem;
        }

        .options {
            display: grid;
            gap: 0.5rem;
        }

        .option {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem;
            border-radius: 5px;
            transition: background 0.2s ease;
        }

        .option:hover {
            background: #f0f0f0;
        }

        .option input[type="radio"] {
            margin-right: 0.5rem;
        }

        .submit-button {
            background: linear-gradient(45deg, #dc3545, #c82333);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 20px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 1rem;
        }

        .submit-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
        }

        .score-display {
            margin-top: 1rem;
            padding: 1rem;
            background: linear-gradient(45deg, #28a745, #20c997);
            color: white;
            border-radius: 10px;
            text-align: center;
            font-weight: bold;
            display: none;
        }

        .score-display.show {
            display: block;
            animation: bounceIn 0.6s ease-out;
        }

        @keyframes bounceIn {
            0% { transform: scale(0.3); opacity: 0; }
            50% { transform: scale(1.05); }
            70% { transform: scale(0.9); }
            100% { transform: scale(1); opacity: 1; }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .section-content {
                grid-template-columns: 1fr;
            }
            
            .container {
                padding: 0 15px;
            }
        }

        /* Scroll Animation */
        .animate-on-scroll {
            opacity: 1;
            transform: translateY(0);
            transition: all 0.6s ease-out;
        }

        .animate-on-scroll.animated {
            opacity: 1;
            transform: translateY(0);
        }
        /* ---------- FOOTER ---------- */
    footer{ padding: 28px 16px 50px; text-align:center; color:#bcd0ee; border-top:1px solid rgba(255,255,255,.08); }
    </style>