.container {
            width: 100%;
            max-width: 800px;
            background-color: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            padding: 30px;
            margin-top: 20px;
        }
        
        h1 {
            text-align: center;
            color: #fff;
            margin-bottom: 10px;
            font-size: 2.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .description {
            text-align: center;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
            font-size: 1.1rem;
            max-width: 800px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #444;
        }
        
        textarea {
            width: 100%;
            height: 150px;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            resize: vertical;
            transition: border-color 0.3s;
            font-family: monospace;
        }
        
        textarea:focus {
            border-color: #2575fc;
            outline: none;
        }
        
        .action-buttons {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        button {
            flex: 1;
            padding: 12px 20px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .encode-btn {
            background-color: #4CAF50;
            color: white;
        }
        
        .encode-btn:hover {
            background-color: #45a049;
            transform: translateY(-2px);
        }
        
        .decode-btn {
            background-color: #2196F3;
            color: white;
        }
        
        .decode-btn:hover {
            background-color: #0b7dda;
            transform: translateY(-2px);
        }
        
        .clear-btn {
            background-color: #f44336;
            color: white;
        }
        
        .clear-btn:hover {
            background-color: #d32f2f;
            transform: translateY(-2px);
        }
        
        .result-container {
            margin-top: 20px;
            padding: 20px;
            background-color: #f9f9f9;
            border-radius: 8px;
            border-left: 5px solid #2575fc;
        }
        
        .result-title {
            font-weight: 600;
            margin-bottom: 10px;
            color: #2575fc;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .result-title i {
            margin-right: 8px;
        }
        
        .result-content {
            word-wrap: break-word;
            word-break: break-all;
            overflow-wrap: break-word;
            white-space: pre-wrap;
            max-height: 300px;
            overflow-y: auto;
            padding: 10px;
            background: #fff;
            border-radius: 5px;
            border: 1px solid #eee;
            font-family: monospace;
            font-size: 14px;
            line-height: 1.4;
        }
        
        .copy-btn {
            background-color: #673AB7;
            color: white;
            padding: 6px 12px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: background-color 0.3s;
        }
        
        .copy-btn:hover {
            background-color: #5E35B1;
        }
        
        .error {
            color: #f44336;
            background-color: #ffebee;
            padding: 15px;
            border-radius: 8px;
            border-left: 5px solid #f44336;
            word-wrap: break-word;
        }
        
        .info-box {
            background-color: #e3f2fd;
            padding: 15px;
            border-radius: 8px;
            margin-top: 30px;
            border-left: 5px solid #2196F3;
        }
        
        .info-box h3 {
            color: #1976d2;
            margin-bottom: 10px;
        }
        
        .info-box ul {
            padding-left: 20px;
        }
        
        .info-box li {
            margin-bottom: 8px;
        }
        
        footer {
            margin-top: 30px;
            text-align: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
        }
        
        @media (max-width: 600px) {
            .container {
                padding: 20px;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .action-buttons {
                flex-direction: column;
            }
            
            .result-title {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }