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

:root {
    --primary-color: #4f46e5;
    --secondary-color: #818cf8;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --user-message-bg: #4f46e5;
    --bot-message-bg: #f1f5f9;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-color);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--surface-color);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 40px);
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.subtitle {
    opacity: 0.9;
    font-size: 0.95rem;
}

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar {
    width: 300px;
    background: var(--background-color);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    overflow-y: auto;
}

.sidebar h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon {
    display: inline-block;
    font-style: normal;
    font-size: 1.2em;
    line-height: 1;
}

.header-icon {
    font-size: 1.5em;
}

.mongo-connection {
    background: var(--surface-color);
    padding: 15px;
    border-radius: 12px;
    border: 2px solid var(--primary-color);
    margin-bottom: 20px;
}

.mongo-connection h3 {
    margin-bottom: 15px;
    font-size: 1rem;
}

.databases-section {
    background: var(--surface-color);
    padding: 15px;
    border-radius: 12px;
    border: 2px solid #48bb78;
    margin-bottom: 20px;
}

.databases-section h3 {
    margin-bottom: 15px;
    font-size: 1rem;
}

.connection-inputs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
}

.input-group input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.load-btn {
    padding: 10px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 5px;
}

.load-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.load-btn:active {
    transform: translateY(0);
}

.load-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
}

.collections-list {
    margin-bottom: 20px;
}

.collection-item {
    padding: 10px 15px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.collection-item:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

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

.collection-selector label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
}

.collection-selector select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    background: var(--surface-color);
    cursor: pointer;
}

.openai-config {
    background: var(--surface-color);
    padding: 15px;
    border-radius: 12px;
    border: 2px solid var(--secondary-color);
    margin-bottom: 20px;
}

.openai-config h3 {
    margin-bottom: 15px;
    font-size: 1rem;
}

.config-inputs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toggle-btn {
    padding: 8px 12px;
    background: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 5px;
}

.toggle-btn:hover {
    background: var(--border-color);
}

.examples {
    background: var(--surface-color);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.examples h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.examples ul {
    list-style: none;
}

.examples li {
    padding: 6px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.examples li:hover {
    color: var(--primary-color);
}

.examples li::before {
    content: "→ ";
    margin-right: 5px;
}

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-content {
    max-width: 75%;
    padding: 15px 20px;
    border-radius: 12px;
    line-height: 1.5;
}

.user-message {
    justify-content: flex-end;
}

.user-message .message-content {
    background: var(--user-message-bg);
    color: white;
    border-bottom-right-radius: 4px;
}

.bot-message .message-content {
    background: var(--bot-message-bg);
    border-bottom-left-radius: 4px;
}

.message-content strong {
    display: block;
    margin-bottom: 5px;
    font-size: 0.85rem;
    opacity: 0.8;
}

.message-content p {
    margin: 5px 0;
    white-space: pre-wrap;
}

.data-display {
    margin-top: 10px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    max-height: 300px;
    overflow-y: auto;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 10px;
}

.loading.error {
    color: #dc2626;
    font-weight: 500;
}

.input-area {
    padding: 20px;
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
}

.input-container {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

#user-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    resize: none;
    font-family: inherit;
    max-height: 150px;
    transition: border-color 0.2s;
}

#user-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.send-btn {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.send-btn svg {
    flex-shrink: 0;
}

.send-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.send-btn:active {
    transform: translateY(0);
}

.send-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive design */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 200px;
    }

    .message-content {
        max-width: 90%;
    }
}