* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Arial', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        
        .loading-container {
            text-align: center;
            color: white;
            z-index: 10;
            position: relative;
        }
        
        .logo {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            margin-bottom: 2rem;
            animation: pulse 2s infinite;
            box-shadow: 0 0 30px rgba(107, 110, 255, 0.5);
        }
        
        h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #6b7aff, #4ecdc4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: glow 2s ease-in-out infinite alternate;
        }
        
        .subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            animation: fadeIn 1s ease-in;
        }
        
        .loading-text {
            font-size: 1.1rem;
            margin-bottom: 2rem;
            color: #6b9aff;
            font-weight: bold;
        }
        
        .spinner {
            width: 50px;
            height: 50px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-top: 4px solid #976bff;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 2rem;
        }
        
        .progress-bar {
            width: 300px;
            height: 4px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 2px;
            margin: 0 auto;
            overflow: hidden;
        }
        
        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #6b86ff, #4ecdc4);
            border-radius: 2px;
            animation: progress 3s ease-in-out;
        }
        
        .math-symbols {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }
        
        .symbol {
            position: absolute;
            font-size: 2rem;
            color: rgba(255, 255, 255, 0.1);
            animation: float 6s ease-in-out infinite;
        }
        
        .symbol:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
        .symbol:nth-child(2) { top: 20%; right: 15%; animation-delay: 1s; }
        .symbol:nth-child(3) { top: 60%; left: 5%; animation-delay: 2s; }
        .symbol:nth-child(4) { top: 70%; right: 10%; animation-delay: 3s; }
        .symbol:nth-child(5) { top: 40%; left: 20%; animation-delay: 4s; }
        .symbol:nth-child(6) { top: 30%; right: 25%; animation-delay: 5s; }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        
        @keyframes glow {
            from { text-shadow: 0 0 20px rgba(255, 107, 107, 0.5); }
            to { text-shadow: 0 0 30px rgba(78, 205, 196, 0.8); }
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        @keyframes progress {
            0% { width: 0%; }
            100% { width: 100%; }
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .redirect-message {
            font-size: 0.9rem;
            opacity: 0.7;
            margin-top: 1rem;
        }
        
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5rem;
            }
            .progress-bar {
                width: 250px;
            }
        }