.test-converter-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 30px;
    background: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.language-selector {
    margin-bottom: 20px;
}

.language-selector label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #2c3338;
}

.language-selector select {
    width: 200px;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 5px;
    background: white;
    font-size: 14px;
}

.text-area-container {
    margin-bottom: 20px;
}

.text-area-container textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 5px;
    resize: vertical;
    min-height: 120px;
    font-size: 14px;
    line-height: 1.6;
}

.text-area-container textarea:focus {
    outline: none;
    border-color: #007cba;
}

.button-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.converter-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    background: #6c757d;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.converter-btn:hover {
    background: #5a6268;
}

.converter-btn:active {
    transform: translateY(1px);
}

#reset-btn {
    background: #6c757d;
}

#reset-btn:hover {
    background: #5a6268;
}

#copy-btn {
    background: #6c757d;
}

#copy-btn:hover {
    background: #5a6268;
}

.convert-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 30px;
}

.convert-btn {
    padding: 12px 15px;
    border: 2px solid #007cba;
    border-radius: 5px;
    background: white;
    color: #007cba;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.convert-btn:hover {
    background: #007cba;
    color: white;
}

.convert-btn:active {
    transform: translateY(1px);
}

.convert-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.result-container {
    margin-bottom: 20px;
}

.result-container h3 {
    margin-bottom: 10px;
    color: #2c3338;
    font-size: 18px;
}

.output-text {
    padding: 20px;
    background: white;
    border: 2px solid #ddd;
    border-radius: 5px;
    min-height: 100px;
    font-size: 16px;
    line-height: 1.6;
    word-wrap: break-word;
}

.message {
    padding: 15px;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Responsive design */
@media (max-width: 768px) {
    .test-converter-container {
        margin: 10px;
        padding: 20px;
    }
    
    .convert-buttons {
        grid-template-columns: 1fr 1fr;
    }
    
    .button-container {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .convert-buttons {
        grid-template-columns: 1fr;
    }
    
    .language-selector select {
        width: 100%;
    }
}