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

:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1b26;
    --bg-tertiary: #24263a;
    --text-primary: #e1e4e8;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --border: #30363d;
    --user-bg: #1f3a5f;
    --assistant-bg: #1a1b26;
    --success: #3fb950;
    --error: #f85149;
    --code-bg: #161b22;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s;
}

.sidebar.hidden {
    transform: translateX(-100%);
    position: absolute;
    z-index: 10;
    height: 100%;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.table-item {
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 4px;
    transition: background 0.15s;
}

.table-item:hover {
    background: var(--bg-tertiary);
}

.table-name {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent);
}

.table-meta {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Chat area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-header h1 {
    font-size: 18px;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 13px;
}

.status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--error);
}

.status-dot.connected {
    background: var(--success);
}

/* Messages */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    max-width: 85%;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.user {
    align-self: flex-end;
}

.message.assistant {
    align-self: flex-start;
}

.message-content {
    padding: 12px 16px;
    border-radius: 12px;
    line-height: 1.5;
    font-size: 14px;
}

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

.message.assistant .message-content {
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.message-content p {
    margin-bottom: 8px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    background: var(--code-bg);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.4;
}

.message-content code {
    font-family: var(--font-mono);
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.message-content pre code {
    background: none;
    padding: 0;
}

.message-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 8px 0;
}

.message-content em {
    color: var(--accent);
}

/* Loading indicator */
.message.loading .message-content::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-secondary);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Input area */
.input-area {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

#user-input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 12px;
    font-family: var(--font-sans);
    font-size: 14px;
    resize: none;
    max-height: 120px;
    line-height: 1.4;
    outline: none;
    transition: border-color 0.15s;
}

#user-input:focus {
    border-color: var(--accent);
}

#send-btn {
    background: var(--accent);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

#send-btn:hover {
    background: var(--accent-hover);
}

#send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Buttons */
.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.15s;
}

.btn-icon:hover {
    color: var(--text-primary);
}

.loading {
    color: var(--text-secondary);
    font-size: 13px;
    text-align: center;
    padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        z-index: 10;
        height: 100%;
        transform: translateX(-100%);
    }

    .sidebar.visible {
        transform: translateX(0);
    }

    .message {
        max-width: 95%;
    }
}