* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Roboto', sans-serif;
        }
        
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #0ea5e9;
            --accent: #10b981;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #64748b;
            --success: #22c55e;
            --error: #ef4444;
        }
        
        body {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            color: var(--light);
            overflow-x: hidden;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        #loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.3s ease-out;
        }
        
        .loader-content {
            text-align: center;
            animation: fadeIn 0.5s ease;
        }
        
        .code-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 15px;
            animation: pulse 1.5s infinite;
        }
        
        .loader-text {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .progress-bar {
            width: 250px;
            height: 5px;
            background: #334155;
            border-radius: 3px;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            width: 0%;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            transition: width 0.3s ease;
        }
        
        .container {
            width: 100%;
            max-width: 500px;
            background: rgba(30, 41, 59, 0.8);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            opacity: 0;
            transform: translateY(10px);
            transition: opacity 0.4s ease, transform 0.4s ease;
        }
        
        .container.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        header {
            background: linear-gradient(90deg, var(--primary-dark), var(--primary));
            padding: 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        h1 {
            font-size: 2rem;
            margin-bottom: 8px;
            font-weight: 800;
        }
        
        .description {
            font-size: 1rem;
            opacity: 0.9;
        }
        
        .content {
            padding: 25px;
        }
        
        .section {
            padding: 20px;
            border-radius: 12px;
            background: rgba(30, 41, 59, 0.6);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.05);
            animation: fadeIn 0.5s ease;
        }
        
        h2 {
            color: var(--light);
            margin-bottom: 15px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        h2 i {
            margin-right: 10px;
            color: var(--primary);
        }
        
        .form-group {
            margin-bottom: 20px;
            position: relative;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--light);
            display: flex;
            align-items: center;
        }
        
        label i {
            margin-right: 8px;
            color: var(--primary);
        }
        
        input {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            font-size: 16px;
            background: rgba(15, 23, 42, 0.5);
            color: var(--light);
            transition: all 0.2s ease;
        }
        
        input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
            background: rgba(15, 23, 42, 0.8);
        }
        
        input::placeholder {
            color: var(--gray);
        }
        
        .btn {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        
        .btn i {
            margin-right: 8px;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(99, 102, 241, 0.4);
        }
        
        .instructions {
            background: linear-gradient(90deg, rgba(234, 179, 8, 0.1), rgba(202, 138, 4, 0.1));
            padding: 15px;
            border-radius: 8px;
            margin-top: 20px;
            border-left: 4px solid #eab308;
            animation: fadeIn 0.5s ease;
        }
        
        .instructions h3 {
            color: #fef3c7;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            border: none;
            padding: 0;
            font-size: 1rem;
        }
        
        .instructions h3 i {
            color: #eab308;
        }
        
        .instructions p {
            color: #fde68a;
            font-size: 0.9rem;
        }
        
        .error {
            background: linear-gradient(90deg, rgba(239, 68, 68, 0.2), rgba(220, 38, 38, 0.2));
            color: #fca5a5;
            padding: 12px;
            border-radius: 8px;
            margin-top: 15px;
            text-align: center;
            border-left: 4px solid var(--error);
            animation: fadeIn 0.3s ease;
        }
        
        @media (max-width: 768px) {
            .content {
                padding: 20px;
            }
            
            h1 {
                font-size: 1.7rem;
            }
            
            .description {
                font-size: 0.9rem;
            }
            
            .container {
                max-width: 100%;
            }
        }