* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    color: #7f8c8d;
}

.upload-section {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed #3498db;
    border-radius: 10px;
    padding: 60px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: #2980b9;
    background-color: #f8f9fa;
}

.upload-area.dragging {
    border-color: #2ecc71;
    background-color: #e8f8f5;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: #000000;
    margin-bottom: 20px;
}

.file-types {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin: 10px 0 20px;
}

.browse-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.browse-btn:hover {
    background: #2980b9;
}

.language-selector {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-selector label {
    font-weight: 600;
    color: #2c3e50;
}

.language-selector select {
    padding: 10px 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    flex: 1;
    max-width: 300px;
}

.translate-btn {
    background: #2ecc71;
    color: white;
    border: none;
    padding: 10px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.translate-btn:hover {
    background: #27ae60;
}

.progress-section {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.progress-bar {
    height: 20px;
    background: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    color: #7f8c8d;
}

.results-section {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.document-viewer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.viewer-pane {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
}

.viewer-pane h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
}

.text-content {
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.8;
    white-space: pre-wrap;
}

.audio-section {
    border-top: 1px solid #e0e0e0;
    padding-top: 30px;
    margin-bottom: 30px;
}

.audio-section h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.generate-audio-btn {
    background: #9b59b6;
    color: white;
    border: none;
    padding: 10px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
    margin-top: 15px;
}

.generate-audio-btn:hover {
    background: #8e44ad;
}

.download-section {
    border-top: 1px solid #e0e0e0;
    padding-top: 30px;
}

.download-section h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.download-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.download-btn {
    flex: 1;
    background: #34495e;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.download-btn:hover:not(:disabled) {
    background: #2c3e50;
}

.download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.download-btn svg {
    width: 20px;
    height: 20px;
}

.new-document-btn {
    width: 100%;
    background: #e74c3c;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.new-document-btn:hover {
    background: #c0392b;
}

@media (max-width: 768px) {
    .document-viewer {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
    }
}