.container {
            background: #f8f9fa;
            border-radius: 20px;
            padding: 30px;
            width: 100%;
            max-width: 600px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid #e9ecef;
        }
        
        h1 {
            text-align: center;
            margin-bottom: 10px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        .subtitle {
            text-align: center;
            margin-bottom: 30px;
            color: #6c757d;
        }
        
        .input-group {
            margin-bottom: 25px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #495057;
        }
        
        textarea {
            width: 100%;
            padding: 15px;
            border-radius: 10px;
            border: 1px solid #ced4da;
            background: #ffffff;
            color: #495057;
            font-size: 16px;
            resize: vertical;
            min-height: 120px;
            transition: all 0.3s;
        }
        
        textarea:focus {
            outline: none;
            border-color: #4dabf7;
            box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.2);
        }
        
        .slider-container {
            margin-bottom: 30px;
        }
        
        .slider-value {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            color: #495057;
        }
        
        .slider-labels {
            display: flex;
            justify-content: space-between;
            margin-top: 5px;
            font-size: 12px;
            color: #6c757d;
        }
        
        .slider {
            -webkit-appearance: none;
            width: 100%;
            height: 8px;
            border-radius: 5px;
            background: #e9ecef;
            outline: none;
        }
        
        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #4dabf7;
            cursor: pointer;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .controls {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        button {
            padding: 12px 25px;
            border: none;
            border-radius: 50px;
            background: #4dabf7;
            color: #ffffff;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(77, 171, 247, 0.3);
            background: #339af0;
        }
        
        button:active {
            transform: translateY(0);
        }
        
        button:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
            background: #adb5bd;
        }
        
        .audio-container {
            margin-top: 20px;
            text-align: center;
            opacity: 0;
            transition: opacity 0.5s ease;
        }
        
        .audio-container.show {
            opacity: 1;
        }
        
        audio {
            width: 100%;
            margin-top: 10px;
        }
        
        .status {
            text-align: center;
            margin-top: 15px;
            min-height: 20px;
            padding: 10px;
            border-radius: 5px;
            background-color: #f8f9fa;
        }
        
        .success {
            background-color: rgba(46, 204, 113, 0.1);
            color: #2ecc71;
            border: 1px solid rgba(46, 204, 113, 0.2);
        }
        
        .error {
            background-color: rgba(231, 76, 60, 0.1);
            color: #e74c3c;
            border: 1px solid rgba(231, 76, 60, 0.2);
        }
        
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(77, 171, 247, 0.3);
            border-radius: 50%;
            border-top-color: #4dabf7;
            animation: spin 1s ease-in-out infinite;
            margin-right: 10px;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .footer {
            text-align: center;
            margin-top: 30px;
            font-size: 14px;
            color: #6c757d;
        }
        
        @media (max-width: 600px) {
            .container {
                padding: 20px;
            }
            
            button {
                padding: 10px 20px;
            }
            
            .controls {
                flex-direction: column;
                align-items: center;
            }
            
            .controls button {
                width: 100%;
                justify-content: center;
            }
        }