body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #f5f5f5;
}

h1 {
    color: #2d2d2d;
    text-align: center;
}

.chat-container {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Loading styles */
#loadingContainer {
    text-align: center;
    padding: 40px 20px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

#progressFill {
    width: 0%;
    height: 100%;
    background-color: #007AFF;
    transition: width 0.3s ease;
}

#loadingText {
    color: #666;
    font-size: 16px;
}

/* Chat interface styles */
#questionInput {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 16px;
    resize: vertical;
}

#sendButton {
    background: #007AFF;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}

#sendButton:hover {
    background: #0056b3;
}

#responseContainer {
    margin-top: 20px;
    padding: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    min-height: 100px;
}

#response {
    margin-top: 12px;
    white-space: pre-wrap;
}