/* Your existing CSS styles remain unchanged */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
            color: #ffffff;
            overflow-x: hidden;
            line-height: 1.6;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
            color: #ffffff;
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* Header Styles */
        .header {
            background: rgba(42, 42, 42, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 107, 53, 0.1);
            padding: 20px 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .navbar {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 40px;
        }

        .logo {
            font-size: 32px;
            font-weight: 800;
            color: #ff6b35;
            text-decoration: none;
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 40px;
        }

        .nav-links a {
            color: #ffffff;
            text-decoration: none;
            font-weight: 500;
            font-size: 15px;
            transition: all 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .nav-links a:hover {
            color: #ff6b35;
            transform: translateY(-2px);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #ff6b35, #ff8c42);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .search-container {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .search-input {
            padding: 12px 20px;
            border: 2px solid rgba(255, 107, 53, 0.2);
            border-radius: 30px;
            background: rgba(58, 58, 58, 0.8);
            color: #ffffff;
            outline: none;
            font-size: 14px;
            transition: all 0.3s ease;
            width: 250px;
        }

        .search-input:focus {
            border-color: #ff6b35;
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
        }

        .search-btn {
            padding: 12px 24px;
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            color: #ffffff;
            border: none;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
        }

        .search-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.8), rgba(42, 42, 42, 0.8)), 
                        radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.1), transparent 70%),
                        radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1), transparent 70%);
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            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"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,107,53,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 0 40px;
        }

        .hero-content h1 {
            font-size: clamp(48px, 6vw, 80px);
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #ffffff, #ff6b35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }

        .hero-content p {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.9;
            font-weight: 400;
        }

        .cta-button {
            display: inline-block;
            padding: 18px 48px;
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            color: #ffffff;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
            position: relative;
            overflow: hidden;
        }

        .cta-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .cta-button:hover::before {
            left: 100%;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(255, 107, 53, 0.4);
        }

        /* Main Content */
        .main-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 100px 40px 80px;
        }

        /* Alert Messages */
        .alert {
            padding: 20px 30px;
            margin-bottom: 30px;
            border-radius: 15px;
            font-weight: 500;
            text-align: center;
            backdrop-filter: blur(10px);
            border: 1px solid;
            animation: slideIn 0.3s ease-out;
        }

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

        .alert-success {
            background: rgba(45, 90, 45, 0.9);
            color: #90ee90;
            border-color: rgba(144, 238, 144, 0.3);
        }

        .alert-error {
            background: rgba(90, 45, 45, 0.9);
            color: #ff6b6b;
            border-color: rgba(255, 107, 107, 0.3);
        }

        /* Classes Grid */
        .classes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
            margin-bottom: 100px;
        }

        .class-card {
            background: rgba(42, 42, 42, 0.8);
            backdrop-filter: blur(20px);
            border-radius: 25px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            transition: all 0.4s ease;
            border: 1px solid rgba(255, 107, 53, 0.1);
            position: relative;
        }

        .class-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #ff6b35, #ff8c42);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .class-card:hover::before {
            opacity: 1;
        }

        .class-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
            border-color: rgba(255, 107, 53, 0.3);
        }

        .class-image {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 140, 66, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 64px;
            position: relative;
            overflow: hidden;
        }

        .class-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at center, rgba(255, 107, 53, 0.1), transparent 70%);
        }

        .class-content {
            padding: 35px;
        }

        .class-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ff6b35;
            letter-spacing: -0.01em;
        }

        .class-description {
            color: #cccccc;
            margin-bottom: 24px;
            line-height: 1.7;
            font-size: 15px;
        }

        .class-details {
            margin-bottom: 30px;
        }

        .class-detail {
            display: flex;
            justify-content: space-between;
            margin-bottom: 12px;
            font-size: 14px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 107, 53, 0.1);
        }

        .class-detail:last-child {
            border-bottom: none;
        }

        .class-detail strong {
            color: #ff6b35;
            font-weight: 600;
        }

        .register-btn {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            color: #ffffff;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            text-align: center;
            box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
            position: relative;
            overflow: hidden;
        }

        .register-btn.registered {
            background: linear-gradient(135deg, #4a5568, #718096);
            cursor: not-allowed;
        }

        .register-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .register-btn:hover::before {
            left: 100%;
        }

        .register-btn:hover:not(.registered) {
            transform: translateY(-2px);
            box-shadow: 0 12px 35px rgba(255, 107, 53, 0.4);
        }

        /* Loading spinner */
        .spinner {
            display: inline-block;
            width: 12px;
            height: 12px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 1s ease-in-out infinite;
            margin-right: 8px;
            vertical-align: middle;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Tables */
        .table-section {
            background: rgba(42, 42, 42, 0.8);
            backdrop-filter: blur(20px);
            border-radius: 25px;
            padding: 50px;
            margin-bottom: 50px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 107, 53, 0.1);
        }

        .table-title {
            font-size: 36px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }

        .custom-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .custom-table th,
        .custom-table td {
            padding: 20px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 107, 53, 0.1);
        }

        .custom-table th {
            background: linear-gradient(135deg, #ff6b35, #ff8c42);
            color: #ffffff;
            font-weight: 600;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .custom-table tr {
            transition: all 0.3s ease;
        }

        .custom-table tr:hover {
            background: rgba(255, 107, 53, 0.05);
            transform: scale(1.01);
        }

        .custom-table td {
            font-size: 14px;
            color: #e0e0e0;
        }

        /* Status badges */
        .status-badge {
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .status-registered {
            background: rgba(144, 238, 144, 0.2);
            color: #90ee90;
            border: 1px solid rgba(144, 238, 144, 0.3);
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .navbar {
                padding: 0 20px;
            }
            
            .main-content {
                padding: 80px 20px 60px;
            }
            
            .classes-grid {
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
                gap: 30px;
            }
            
            .table-section {
                padding: 30px;
            }
        }

        @media (max-width: 768px) {
            .navbar {
                flex-direction: column;
                gap: 20px;
                padding: 20px;
            }

            .nav-links {
                flex-wrap: wrap;
                gap: 20px;
                justify-content: center;
            }

            .search-container {
                width: 100%;
            }

            .search-input {
                flex: 1;
            }

            .hero-content h1 {
                font-size: 36px;
            }

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

            .table-section {
                padding: 20px;
                overflow-x: auto;
            }

            .custom-table {
                min-width: 600px;
            }
        }

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

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

        /* Scroll animations */
        .scroll-reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .scroll-reveal.revealed {
            opacity: 1;
            transform: translateY(0);
        }