/* Modern Professional Design - Complete rewrite with new color scheme */
:root {
    --primary-600: #6366f1;
    --primary-700: #4f46e5;
    --primary-50: #f0f4ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    
    --purple-accent: #9333ea;
    --purple-light: #a855f7;
    --purple-dark: #7e22ce;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    --sidebar-width: 320px;
    
    /* Light theme variables */
    --bg-primary: #f9fafb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Dark theme variables */
body.dark-theme {
    --bg-primary: #0a0a0a;
    --bg-secondary: #171717;
    --bg-tertiary: #262626;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --border-color: #404040;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.6);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.7);
    
    --primary-50: #262626;
    --primary-100: #404040;
    --gray-50: #1a1a1a;
    --gray-100: #262626;
    --gray-200: #404040;
    --gray-300: #525252;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    height: 100vh;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s ease;
}



.panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.model-selection-panel {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.model-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 16px;
}

/* Provider Section Styles */
.provider-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.provider-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.3px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    user-select: none;
    transition: all 0.3s ease;
}

.provider-header:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.provider-collapse-icon {
    font-size: 10px;
    transition: transform 0.2s;
    width: 12px;
    display: inline-block;
}

/* Provider-specific colors */
.provider-header.provider-anthropic {
    background: linear-gradient(135deg, #D97706, #B45309);
}

.provider-header.provider-openai {
    background: linear-gradient(135deg, #10B981, #059669);
}

.provider-header.provider-google {
    background: linear-gradient(135deg, #3B82F6, #2563EB);
}

.provider-icon {
    font-size: 18px;
}

.provider-name {
    flex: 1;
}

.provider-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

.provider-models {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-left: 8px;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
    opacity: 1;
}

.provider-section.collapsed .provider-models {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-top: 0;
}

.model-checkbox-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-tertiary);
}

.model-checkbox-item:hover {
    border-color: var(--primary-600);
    background: var(--bg-primary);
    transform: translateX(4px);
}

.model-checkbox-item.selected {
    border-color: var(--primary-600);
    background: var(--bg-primary);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.model-checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-600);
    margin-top: 2px;
}

.model-info-wrapper {
    flex: 1;
}

.model-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    transition: color 0.3s ease;
}

.model-pricing {
    font-size: 11px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.3s ease;
}

.price-highlight {
    color: var(--success);
    font-weight: 700;
    font-size: 12px;
    background: #dcfce7;
    padding: 2px 8px;
    border-radius: 4px;
}

.price-input {
    color: var(--primary-600);
    font-weight: 600;
}

.price-output {
    color: var(--accent);
    font-weight: 600;
}

/* Toggle Switch */
.comparison-mode-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-300);
    border-radius: 24px;
    transition: 0.3s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-600);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

.comparison-mode-toggle label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: color 0.3s ease;
}

/* LangChain Mode Toggle */
.langchain-mode-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(147, 51, 234, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.langchain-mode-toggle:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(147, 51, 234, 0.15));
    border-color: rgba(99, 102, 241, 0.5);
}

.langchain-mode-toggle label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.toggle-hint {
    font-size: 16px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.langchain-mode-toggle:hover .toggle-hint {
    opacity: 1;
}

.langchain-mode-toggle .toggle-switch input:checked + .toggle-slider {
    background: linear-gradient(135deg, #6366f1, #9333ea);
}

/* Session Stats */
.session-stats {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.stat-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.clear-chat-btn {
    margin: 24px;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.clear-chat-btn:hover {
    background: var(--bg-primary);
    border-color: var(--border-color);
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    height: 64px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.chat-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.data-mode-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.data-mode-indicator svg {
    width: 16px;
    height: 16px;
    fill: var(--text-secondary);
}

.data-mode-indicator.dummy-data {
    color: var(--text-secondary);
}

.data-mode-indicator.dummy-data svg {
    fill: var(--text-secondary);
}

.data-mode-indicator.real-data {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

.data-mode-indicator.real-data svg {
    fill: var(--success);
}

.data-mode-indicator.not-connected {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

.data-mode-indicator.not-connected svg {
    fill: var(--error);
}

.data-mode-indicator.admin-mode {
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
    font-weight: 600;
}

.data-mode-indicator.admin-mode svg {
    fill: #f59e0b;
}

.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.theme-toggle-btn:hover {
    background: var(--bg-primary);
    color: var(--purple-accent);
    transform: scale(1.05);
}

.theme-icon {
    position: absolute;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg);
}

body.dark-theme .sun-icon {
    opacity: 0;
    transform: rotate(180deg);
}

body.dark-theme .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border-radius: 20px;
    font-size: 13px;
    transition: background-color 0.3s ease;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    background: var(--gray-50);
}

/* Welcome Message */
.welcome-message {
    max-width: 600px;
    margin: 80px auto;
    text-align: center;
}

.welcome-icon {
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.welcome-message h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.welcome-message p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    transition: color 0.3s ease;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.quick-action-btn {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-action-btn:hover {
    border-color: var(--primary-600);
    background: var(--bg-tertiary);
    color: var(--primary-600);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body.dark-theme .quick-action-btn:hover {
    border-color: var(--purple-accent);
    color: var(--purple-accent);
    box-shadow: 0 0 15px rgba(147, 51, 234, 0.3);
}

/* Messages */
.message-group {
    margin-bottom: 32px;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-600);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
}

.user-avatar {
    background: var(--gray-700);
}

body.dark-theme .user-avatar {
    background: linear-gradient(135deg, var(--purple-accent), var(--purple-light));
}

.message-sender {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.message-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.user-message .message-content {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

/* Comparison Grid */
.comparison-grid {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    overflow-x: auto;
    overflow-y: visible;
    padding-bottom: 8px;
    scroll-behavior: smooth;
}

/* Custom scrollbar for comparison grid */
.comparison-grid::-webkit-scrollbar {
    height: 8px;
}

.comparison-grid::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

.comparison-grid::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 4px;
}

.comparison-grid::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

.model-response-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-width: 900px;
    max-width: 1300px;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.model-response-header {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.model-response-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.model-response-status {
    font-size: 12px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.model-response-status.thinking {
    color: var(--warning);
}

.model-response-status.complete {
    color: var(--success);
}

.model-response-content {
    padding: 20px;
    min-height: 100px;
}

.model-response-footer {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    transition: all 0.3s ease;
}

.token-breakdown {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
    width: 100%;
}

.response-cost {
    color: var(--primary-600);
    font-weight: 600;
    font-size: 13px;
    transition: color 0.3s ease;
}

body.dark-theme .response-cost {
    color: var(--purple-accent);
}

.token-detail {
    color: var(--text-secondary);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.3s ease;
}

.response-tokens {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

/* Reasoning Section */
.reasoning-section {
    margin: 16px 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
    transition: all 0.3s ease;
}

.reasoning-section summary {
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.reasoning-section summary::marker {
    content: '';
}

.reasoning-section summary::before {
    content: '▶';
    transition: transform 0.2s;
    font-size: 10px;
    color: var(--text-secondary);
}

.reasoning-section[open] summary::before {
    transform: rotate(90deg);
}

.reasoning-content {
    padding: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    transition: color 0.3s ease;
}

/* Input Panel */
.input-panel {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 16px 32px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.input-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 12px;
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

body.dark-theme .input-wrapper:focus-within {
    border-color: var(--purple-accent);
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.3);
}

.input-wrapper textarea {
    width: 100%;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    min-height: 24px;
    max-height: 200px;
    background: transparent;
    transition: color 0.3s ease;
}

.input-wrapper textarea::placeholder {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
}

.icon-button {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.icon-button:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.send-button {
    padding: 10px 20px;
    background: var(--primary-600);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.send-button:hover {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body.dark-theme .send-button {
    background: linear-gradient(135deg, var(--primary-600), var(--purple-accent));
}

body.dark-theme .send-button:hover {
    background: linear-gradient(135deg, var(--primary-700), var(--purple-dark));
    box-shadow: 0 0 20px rgba(147, 51, 234, 0.4);
}

.send-button:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
}

.input-footer {
    max-width: 1200px;
    margin: 8px auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.model-info {
    font-weight: 500;
}

.shortcut-hint kbd {
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 11px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

/* Markdown Styling */
.message-content h1, .message-content h2, .message-content h3 {
    color: var(--text-primary);
    margin: 16px 0 8px 0;
    font-weight: 600;
    transition: color 0.3s ease;
}

.message-content h1 { font-size: 24px; }
.message-content h2 { font-size: 20px; }
.message-content h3 { font-size: 16px; }

.message-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 24px 0;
    transition: border-color 0.3s ease;
}

.message-content p {
    margin: 12px 0;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.message-content ul, .message-content ol {
    margin: 16px 0;
    padding-left: 28px;
}

.message-content ul {
    list-style-type: disc;
}

.message-content ol {
    list-style-type: decimal;
    counter-reset: item;
}

.message-content ol li {
    counter-increment: item;
}

/* Continue numbering for consecutive ordered lists */
.message-content ol + ol {
    counter-reset: none;
}

.message-content li {
    margin: 8px 0;
    color: var(--text-primary);
    display: list-item;
    line-height: 1.6;
    transition: color 0.3s ease;
}

.message-content ol > li {
    font-weight: 500;
    margin-bottom: 12px;
}

.message-content ol > li strong {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.message-content ul li {
    margin: 6px 0;
}

.model-response-content ul, .model-response-content ol {
    margin: 16px 0;
    padding-left: 28px;
}

.model-response-content ul {
    list-style-type: disc;
}

.model-response-content ol {
    list-style-type: decimal;
}

.model-response-content li {
    margin: 8px 0;
    color: var(--text-primary);
    display: list-item;
    line-height: 1.6;
    transition: color 0.3s ease;
}

.model-response-content ol > li {
    font-weight: 500;
    margin-bottom: 12px;
}

.model-response-content ol > li strong {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.model-response-content ul li {
    margin: 6px 0;
}

/* Model response headings */
.model-response-content h1, 
.model-response-content h2, 
.model-response-content h3,
.model-response-content h4,
.model-response-content h5,
.model-response-content h6 {
    color: var(--text-primary);
    margin: 16px 0 8px 0;
    font-weight: 600;
    transition: color 0.3s ease;
}

.model-response-content h1 { font-size: 24px; }
.model-response-content h2 { font-size: 20px; }
.model-response-content h3 { font-size: 16px; }
.model-response-content h4 { font-size: 14px; }

.model-response-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 24px 0;
    transition: border-color 0.3s ease;
}

.model-response-content p {
    color: var(--text-primary);
    margin: 12px 0;
    transition: color 0.3s ease;
}

.message-content strong {
    color: var(--text-primary);
    font-weight: 600;
    transition: color 0.3s ease;
}

.message-content code {
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    color: var(--primary-700);
    transition: all 0.3s ease;
}

body.dark-theme .message-content code {
    background: rgba(147, 51, 234, 0.1);
    border-color: rgba(147, 51, 234, 0.3);
    color: var(--purple-light);
}

.message-content a {
    color: var(--primary-600);
    text-decoration: none;
    border-bottom: 1px solid var(--primary-200);
    transition: all 0.3s ease;
}

.message-content a:hover {
    border-bottom-color: var(--primary-600);
}

body.dark-theme .message-content a {
    color: var(--purple-accent);
    border-bottom-color: rgba(147, 51, 234, 0.3);
}

body.dark-theme .message-content a:hover {
    color: var(--purple-light);
    border-bottom-color: var(--purple-accent);
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    margin: 16px 0;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.message-content table,
.model-response-content table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    font-size: 13px;
    transition: background-color 0.3s ease;
}

.message-content th,
.model-response-content th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    padding: 12px 16px;
    border-bottom: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.message-content td,
.model-response-content td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.message-content tr:last-child td,
.model-response-content tr:last-child td {
    border-bottom: none;
}

.message-content tr:hover,
.model-response-content tr:hover {
    background: var(--bg-tertiary);
}

/* Loading */
.loading-state {
    padding: 12px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    transition: color 0.3s ease;
}

.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 12px 0;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typing 1.4s infinite;
    transition: background-color 0.3s ease;
}

body.dark-theme .typing-indicator span {
    background: var(--purple-accent);
    box-shadow: 0 0 6px rgba(147, 51, 234, 0.5);
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* Scrollbar */
.sidebar::-webkit-scrollbar,
.chat-container::-webkit-scrollbar,
.model-checkboxes::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track,
.chat-container::-webkit-scrollbar-track,
.model-checkboxes::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb,
.chat-container::-webkit-scrollbar-thumb,
.model-checkboxes::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
    transition: background-color 0.3s ease;
}

.sidebar::-webkit-scrollbar-thumb:hover,
.chat-container::-webkit-scrollbar-thumb:hover,
.model-checkboxes::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

body.dark-theme .sidebar::-webkit-scrollbar-thumb,
body.dark-theme .chat-container::-webkit-scrollbar-thumb,
body.dark-theme .model-checkboxes::-webkit-scrollbar-thumb {
    background: rgba(147, 51, 234, 0.3);
}

body.dark-theme .sidebar::-webkit-scrollbar-thumb:hover,
body.dark-theme .chat-container::-webkit-scrollbar-thumb:hover,
body.dark-theme .model-checkboxes::-webkit-scrollbar-thumb:hover {
    background: var(--purple-accent);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 32px;
    max-width: 440px;
    width: 90%;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.clear-chat-modal {
    text-align: center;
}

.modal-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.modal-icon svg {
    animation: scaleIn 0.4s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px 0;
}

.modal-message {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 28px 0;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modal-btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-btn-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.modal-btn-cancel:hover {
    background: var(--bg-primary);
    transform: translateY(-1px);
}

.modal-btn-confirm {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.2);
}

.modal-btn-confirm:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(239, 68, 68, 0.3);
}

.modal-btn-confirm:active,
.modal-btn-cancel:active {
    transform: translateY(0);
}

/* Dark theme modal adjustments */
body.dark-theme .modal-overlay {
    background: rgba(0, 0, 0, 0.7);
}

body.dark-theme .modal-content {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

body.dark-theme .clear-chat-modal .modal-icon circle {
    fill: #3f1d1d;
    stroke: #4a1f1f;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar { display: none; }
    .model-response-card {
        min-width: 350px;
        max-width: 500px;
    }
}

@media (max-width: 768px) {
    .chat-container { padding: 16px; }
    .input-panel { padding: 12px 16px; }
    .welcome-message { margin: 40px auto; }
    .quick-actions { grid-template-columns: 1fr; }
    .model-response-card {
        min-width: 300px;
        max-width: 400px;
    }
}

/* Dark theme subtle purple accent */
body.dark-theme {
    background: radial-gradient(ellipse at top, rgba(147, 51, 234, 0.03) 0%, var(--bg-primary) 60%);
}

/* ===============================
   Data Source Panel
   =============================== */
.data-source-panel {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.environment-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.env-option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.env-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.env-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.env-option input[type="radio"]:checked + .env-label {
    color: white;
}

.env-option:has(input[type="radio"]:checked) {
    background: var(--primary-600);
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.env-option:hover:not(:has(input[type="radio"]:checked)) {
    background: var(--bg-primary);
}

.data-source-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.data-source-toggle label[for="dataSourceMode"] {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
}

.jwt-config-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--primary-600);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 8px;
}

.jwt-config-btn:hover:not(:disabled) {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

.jwt-config-btn:active:not(:disabled) {
    transform: translateY(0);
}

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

.jwt-status {
    margin-top: 12px;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.jwt-status-header {
    margin-bottom: 0;
}

.jwt-status.connected .jwt-status-header {
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.jwt-status-text {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.jwt-status.connected .jwt-status-text {
    color: var(--success);
}

.jwt-user-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.user-detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.user-detail-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.user-detail-value {
    color: var(--text-primary);
    font-weight: 400;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-detail-value.user-id {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 11px;
    cursor: help;
}

.expand-details-btn,
.collapse-details-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 8px;
    padding: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.expand-details-btn:hover,
.collapse-details-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary-600);
}

.expand-icon,
.collapse-icon {
    transition: transform 0.2s ease;
}

/* ===============================
   User Profile Details
   =============================== */
.user-profile-details {
    margin-top: 12px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

.profile-section {
    margin-bottom: 16px;
}

.profile-section:last-of-type {
    margin-bottom: 12px;
}

.profile-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 10px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

.profile-detail-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    font-size: 12px;
    gap: 12px;
}

.profile-detail-item:last-child {
    margin-bottom: 0;
}

.profile-label {
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 100px;
    flex-shrink: 0;
}

.profile-value {
    color: var(--text-primary);
    font-weight: 400;
    text-align: right;
    word-break: break-word;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 500px;
    }
}

/* ===============================
   JWT Modal
   =============================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-description {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0 0 20px 0;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    resize: vertical;
    transition: all 0.2s ease;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    transition: all 0.2s ease;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-help {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.jwt-validation-status {
    margin-top: 12px;
    min-height: 24px;
}

.validation-error,
.validation-success,
.validation-info {
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
}

.validation-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.validation-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.validation-info {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-600);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
}

.btn-primary,
.btn-secondary {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-primary);
}

.btn-primary {
    background: var(--primary-600);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

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

.btn-loader {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===============================
   Environment Notification
   =============================== */
.env-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10000;
}

.env-notification.show {
    transform: translateY(0);
    opacity: 1;
}

.env-notification svg {
    color: var(--primary-600);
}

.env-notification span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* ===============================
   Strategy Selector
   =============================== */
.strategy-selector-wrapper {
    position: relative;
}

.icon-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-button:hover:not(:disabled) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.icon-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.icon-button.active {
    background: var(--primary-600);
    color: white;
}

.strategy-dropdown {
    position: absolute;
    bottom: 100%;
    right: 0;
    margin-bottom: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    width: 320px;
    max-height: 400px;
    overflow: hidden;
    z-index: 1000;
    animation: slideUpFade 0.2s ease;
}

.strategy-dropdown-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.strategy-dropdown-header span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.strategy-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.strategy-close-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.strategy-list {
    max-height: 320px;
    overflow-y: auto;
}

.strategy-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid var(--border-color);
}

.strategy-item:last-child {
    border-bottom: none;
}

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

.strategy-item.selected {
    background: var(--primary-50);
    border-left: 3px solid var(--primary-600);
}

.strategy-item-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.strategy-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.strategy-item-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.strategy-check {
    color: var(--primary-600);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.strategy-item.selected .strategy-check {
    opacity: 1;
}

.strategy-loading,
.strategy-empty {
    padding: 32px 16px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.input-footer-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.strategy-info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--primary-600);
    padding: 4px 8px;
    background: var(--primary-50);
    border-radius: 4px;
}

.strategy-info svg {
    flex-shrink: 0;
}

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

/* Header-based Strategy Selector */
.strategy-selector-header {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.strategy-header-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.strategy-header-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-400);
}

.strategy-header-btn.strategy-selected {
    background: var(--primary-50);
    border-color: var(--primary-600);
    color: var(--primary-600);
    font-weight: 500;
}

.strategy-header-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    width: 280px;
    max-height: 300px;
    overflow: hidden;
    z-index: 1000;
    animation: slideDownFade 0.2s ease;
}

.strategy-header-list {
    max-height: 300px;
    overflow-y: auto;
    padding: 4px;
}

.strategy-header-list .strategy-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.strategy-header-list .strategy-item:hover {
    background: var(--bg-tertiary);
}

.strategy-header-list .strategy-item.selected {
    background: var(--primary-50);
    color: var(--primary-600);
}

.strategy-header-list .strategy-icon {
    font-size: 16px;
}

.strategy-header-list .strategy-item-name {
    font-size: 14px;
    font-weight: 500;
}

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

/* Dark theme adjustments */
body.dark-theme .strategy-item.selected {
    background: var(--primary-100);
}

body.dark-theme .strategy-info {
    background: var(--primary-100);
}

body.dark-theme .strategy-header-btn.strategy-selected {
    background: var(--primary-100);
}

body.dark-theme .strategy-header-list .strategy-item.selected {
    background: var(--primary-100);
}

/* ============================================
   LangChain Agent Reasoning Collapsible
   ============================================ */

.reasoning-collapsible {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    overflow: hidden;
}

.reasoning-collapsible summary {
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    transition: all 0.2s ease;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.reasoning-collapsible summary::-webkit-details-marker {
    display: none;
}

/* Thinking loader animation */
.thinking-loader {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top-color: var(--text-secondary);
    border-radius: 50%;
    animation: thinking-spin 1s linear infinite;
    flex-shrink: 0;
}

@keyframes thinking-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.thinking-text {
    color: var(--text-secondary);
    font-weight: 500;
    margin-left: auto;
}

.reasoning-collapsible summary::before {
    content: '▶';
    display: inline-block;
    width: 12px;
    transition: transform 0.2s ease;
    color: var(--text-secondary);
    font-size: 10px;
}

.reasoning-collapsible[open] summary::before {
    transform: rotate(90deg);
}

.reasoning-collapsible summary:hover {
    background: var(--gray-200);
}

.reasoning-collapsible summary:hover .thinking-text {
    color: var(--text-primary);
}

.reasoning-content {
    padding: 20px;
    background: var(--bg-secondary);
    max-height: 600px;
    overflow-y: auto;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.7;
}

.reasoning-content h2 {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    margin-top: 20px;
    margin-bottom: 12px;
    opacity: 0.85;
}

.reasoning-content h2:first-child {
    margin-top: 0;
}

.reasoning-content h3 {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    margin-top: 16px;
    margin-bottom: 8px;
    opacity: 0.8;
}

.reasoning-content h3:first-child {
    margin-top: 0;
}

.reasoning-content p {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.reasoning-content em {
    font-style: italic;
    color: var(--text-secondary);
    opacity: 0.9;
}

.reasoning-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 20px 0;
    opacity: 0.3;
}

.reasoning-content::-webkit-scrollbar {
    width: 8px;
}

.reasoning-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.reasoning-content::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

.reasoning-content::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.answer-content {
    margin-top: 0;
}

/* Dark theme adjustments */
body.dark-theme .reasoning-collapsible {
    border-color: var(--border-color);
    background: var(--bg-secondary);
}

body.dark-theme .reasoning-collapsible summary {
    background: var(--bg-tertiary);
}

body.dark-theme .reasoning-collapsible summary:hover {
    background: var(--gray-200);
}

body.dark-theme .reasoning-content {
    background: var(--bg-secondary);
    opacity: 0.65;
}

body.dark-theme .thinking-loader {
    border-color: var(--border-color);
    border-top-color: var(--text-secondary);
}

/* ===============================
   KaTeX Math Rendering Styles
   =============================== */

/* Display math (centered block formulas) */
.katex-display {
    margin: 1.5em 0;
    padding: 1em;
    background: var(--bg-tertiary);
    border-radius: 8px;
    overflow-x: auto;
    text-align: center;
}

/* Inline math */
.katex {
    font-size: 1.1em;
}

/* Math error styling */
.math-error {
    color: var(--error);
    font-family: monospace;
    background: rgba(239, 68, 68, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Dark theme adjustments for math */
body.dark-theme .katex-display {
    background: var(--gray-800);
}

body.dark-theme .katex {
    color: var(--text-primary);
}

body.dark-theme .katex .base {
    color: var(--text-primary);
}

/* Ensure math scrolls horizontally on small screens */
.message-content .katex-display {
    max-width: 100%;
}

/* Style for fractions and complex expressions */
.katex-html {
    line-height: 1.6;
}