* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4efe9 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #4a5568;
            padding: 10px 5px;
            opacity: 0; 
            transition: opacity 0.3s;
        }
        body.show { opacity: 1; }
        .container {
            width: 100%;
            max-width: 600px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 16px;
            padding: 35px 30px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            text-align: center;
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.8);
        }
        
        .logo {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #667eea;
            font-size: 32px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        h1 {
            margin-bottom: 15px;
            color: #4a5568;
            font-weight: 600;
            font-size: 28px;
        }
        
        p {
            color: #718096;
            margin-bottom: 25px;
            line-height: 1.6;
            font-size: 16px;
        }
        
        .slider-container {
            background: #f7fafc;
            border-radius: 30px;
            height: 60px;
            position: relative;
            margin: 35px 0;
            box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.06);
            overflow: hidden;
            border: 1px solid #edf2f7;
        }
        
        .slider-track {
            width: 100%;
            height: 100%;
            position: absolute;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #a0aec0;
            font-weight: 500;
            letter-spacing: 1px;
            user-select: none;
            font-size: 15px;
        }
        
        .slider-thumb {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
            border-radius: 50%;
            position: absolute;
            left: 0;
            top: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: grab;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
            z-index: 2;
        }
        
        .slider-thumb:active {
            cursor: grabbing;
            transform: scale(1.05);
            box-shadow: 0 6px 16px rgba(102, 126, 234, 0.35);
        }
        
        .slider-thumb i {
            color: #667eea;
            font-size: 22px;
        }
        
        .success-message {
            color: #38a169;
            font-weight: 500;
            margin-top: 20px;
            opacity: 0;
            transition: opacity 0.5s;
            display: flex;
            align-items: center;
            justify-content: center;
            display:none;
        }
        .error-message{
            color: #e53e3e;
            font-weight: 500;
        }
        .loader {
            display: inline-block;
            width: 18px;
            height: 18px;
            border: 2px solid rgba(56, 161, 105, 0.3);
            border-radius: 50%;
            border-top-color: #38a169;
            animation: spin 1s linear infinite;
            margin-right: 10px;
            opacity: 0;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .security-tips {
            background: #f7fafc;
            border-left: 4px solid #667eea;
            padding: 16px;
            text-align: left;
            border-radius: 8px;
            margin-top: 25px;
            font-size: 14px;
        }
        
        .security-tips h3 {
            color: #667eea;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            font-size: 16px;
        }
        
        .security-tips h3 i {
            margin-right: 8px;
        }
        
        .security-tips ul {
            padding-left: 20px;
            color: #718096;
        }
        
        .security-tips li {
            margin-bottom: 8px;
            line-height: 1.5;
        }
        
        .footer {
            margin-top: 25px;
            color: #a0aec0;
            font-size: 13px;
        }
        
        @media (max-width: 600px) {
            .container {
                padding: 25px 20px;
                width: 95%;
            }
            
            h1 {
                font-size: 24px;
            }
            
            p {
                font-size: 15px;
            }
            
            .slider-container {
                height: 56px;
            }
            
            .slider-thumb {
                width: 56px;
                height: 56px;
            }
        }