/* CSS Variables for Theming */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-sidebar: #f5f0e6;
    --bg-sidebar-hover: rgba(0, 0, 0, 0.08);
    --border-sidebar: rgba(0, 0, 0, 0.12);
    --input-sidebar-bg: rgba(255, 255, 255, 0.6);
    --input-sidebar-border: rgba(0, 0, 0, 0.15);
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-sidebar: #3d2e1a;
    --accent: #3498db;
    --accent-hover: #2980b9;
    --border: #e1e8ed;
    --shadow: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --error: #e74c3c;
    --success: #27ae60;
}

/* Dark Mode Variables */
.dark-mode {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-sidebar: #0d1117;
    --bg-sidebar-hover: rgba(255, 255, 255, 0.1);
    --border-sidebar: rgba(255, 255, 255, 0.1);
    --input-sidebar-bg: rgba(255, 255, 255, 0.1);
    --input-sidebar-border: rgba(255, 255, 255, 0.2);
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-sidebar: #eaeaea;
    --accent: #4fa3d1;
    --accent-hover: #3498db;
    --border: #2d2d44;
    --shadow: rgba(0, 0, 0, 0.3);
    --card-bg: #1f1f3a;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px var(--shadow);
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 0.75rem;
    background: none;
    border: none;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s;
    position: relative;
}

.auth-tab.active {
    color: var(--accent);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent);
}

/* Auth Forms */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.3s, background-color 0.3s;
}

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

.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.auth-error {
    color: var(--error);
    margin-top: 1rem;
    font-size: 0.875rem;
}

.auth-success {
    color: var(--success);
    margin-top: 1rem;
    font-size: 0.875rem;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.dashboard.hidden {
    display: none;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    transition: width 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar.collapsed {
    width: 60px;
}

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

.sidebar-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    margin-right: 6px;
    transition: opacity 0.3s;
}

.sidebar.collapsed .sidebar-logo {
    opacity: 0;
    width: 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    transition: opacity 0.3s;
}

.sidebar.collapsed .logo {
    opacity: 0;
    width: 0;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-sidebar);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: transform 0.3s;
}

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-sidebar);
    text-decoration: none;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.nav-item:hover {
    background-color: var(--bg-sidebar-hover);
}

.nav-item.active {
    background-color: var(--accent);
}

.nav-icon {
    font-size: 1.25rem;
    min-width: 28px;
    text-align: center;
}

.nav-text {
    margin-left: 0.75rem;
    transition: opacity 0.3s, width 0.3s;
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Navigation Tree */
.nav-tree {
    position: relative;
}

.nav-tree-parent {
    position: relative;
}

.nav-tree-parent .tree-toggle {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-tree.expanded .tree-toggle {
    transform: rotate(90deg);
}

.nav-tree-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: rgba(0, 0, 0, 0.15);
}

.nav-tree.expanded .nav-tree-children {
    max-height: 200px;
}

.nav-tree-leaf {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    color: var(--text-sidebar);
    text-decoration: none;
    transition: background-color 0.3s;
    white-space: nowrap;
    font-size: 0.9rem;
}

.nav-tree-leaf:hover {
    background-color: var(--bg-sidebar-hover);
}

.nav-tree-leaf.active {
    background-color: var(--accent);
    color: #fff;
}

.leaf-icon {
    font-size: 0.5rem;
    min-width: 20px;
    text-align: center;
    opacity: 0.7;
}

.nav-tree-leaf.active .leaf-icon {
    opacity: 1;
}

/* Collapsed sidebar tree styles */
.sidebar.collapsed .nav-tree-children {
    display: none;
}

.sidebar.collapsed .tree-toggle {
    display: none;
}

/* Analytics Tools */
.analytics-tool {
    display: none;
}

.analytics-tool.active {
    display: block;
}

.tool-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
}

.tool-placeholder .placeholder-icon {
    font-size: 4rem;
    opacity: 0.5;
    margin-bottom: 1rem;
}

.tool-placeholder h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tool-placeholder p {
    color: var(--text-secondary);
    max-width: 400px;
}

.tool-placeholder .placeholder-hint {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--accent);
    font-weight: 500;
}

/* Main Wrapper */
.main-wrapper {
    flex: 1;
    margin-left: 250px;
    transition: margin-left 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.sidebar.collapsed ~ .main-wrapper {
    margin-left: 60px;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Header Button (Documentation, etc.) */
.header-btn {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s, border-color 0.3s;
    text-decoration: none;
    color: inherit;
}

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

.header-btn-icon {
    font-size: 1.1rem;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s, border-color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent);
}

.theme-icon {
    font-size: 1.25rem;
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#userName {
    font-weight: 500;
    color: var(--text-primary);
}

.company-badge {
    padding: 0.25rem 0.75rem;
    background-color: var(--accent);
    color: white;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.btn-logout {
    padding: 0.5rem 1rem;
    background-color: transparent;
    border: 1px solid var(--error);
    color: var(--error);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.btn-logout:hover {
    background-color: var(--error);
    color: white;
}

.btn-manage-sub {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
    background-color: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.btn-manage-sub:hover {
    background-color: var(--accent);
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent);
}

/* Welcome Section */
.welcome-section {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
}

.welcome-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.welcome-section h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.welcome-section p {
    color: var(--text-secondary);
}

.trial-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.trial-cta p {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
}

.btn-trial {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.btn-trial:hover {
    opacity: 0.85;
}

.btn-signin {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-signin:hover {
    opacity: 0.85;
}

.welcome-hero {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    align-items: flex-start;
}

.welcome-hero-img {
    flex: 1;
    min-width: 0;
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.welcome-benefits-card {
    flex: 0 0 300px;
    background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #6c5ce7));
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    color: #fff;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.benefits-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.25);
}

.benefits-icon {
    font-size: 1.2rem;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.benefits-list li {
    font-size: 0.875rem;
    line-height: 1.45;
    padding-left: 1.4rem;
    position: relative;
}

.benefits-list li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    font-weight: 700;
    opacity: 0.9;
}

@media (max-width: 900px) {
    .welcome-hero {
        flex-direction: column;
    }
    .welcome-benefits-card {
        flex: none;
        width: 100%;
    }
}

/* Page Content */
.page h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.page p {
    color: var(--text-secondary);
}

/* Analytics Page */
.analytics-header {
    margin-bottom: 1.5rem;
}

.data-select-section {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    margin-bottom: 1.5rem;
}

.data-select-section h3 {
    margin: 0 0 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-select-container {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.dataset-dropdown {
    flex: 1;
    min-width: 250px;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
}

.dataset-dropdown:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-load {
    padding: 0.75rem 1.5rem;
    white-space: nowrap;
}

.data-select-hint {
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.analytics-content {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    min-height: 300px;
}

.no-data-message {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-secondary);
    font-style: italic;
}

.dataset-preview {
    margin-top: 1rem;
}

.dataset-preview h4 {
    margin: 0 0 0.5rem;
    color: var(--text-primary);
}

.dataset-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background-color: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
}

.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-top: 0.25rem;
}

/* Nav Section Header */
.nav-section-header {
    display: flex;
    align-items: center;
    padding: 1rem 1rem 0.5rem;
    color: var(--text-sidebar);
    opacity: 0.6;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 1rem;
    border-top: 1px solid var(--border-sidebar);
}

.nav-section-header .nav-icon {
    font-size: 0.75rem;
    min-width: 28px;
    text-align: center;
}

.sidebar.collapsed .nav-section-header .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Sidebar Controls */
.sidebar-section {
    padding: 0;
}

/* Collapsible Sidebar Sections */
.sidebar-section.collapsible .nav-section-header {
    cursor: pointer;
    user-select: none;
}

.sidebar-section.collapsible .nav-section-header:hover {
    opacity: 0.8;
}

.section-toggle-icon {
    margin-left: auto;
    font-size: 0.6rem;
    transition: transform 0.2s ease;
}

.sidebar-section.collapsible.collapsed .section-toggle-icon {
    transform: rotate(-90deg);
}

.sidebar-section.collapsible .section-content {
    overflow: hidden;
    max-height: 1000px;
    transition: max-height 0.3s ease;
}

.sidebar-section.collapsible.collapsed .section-content {
    max-height: 0;
}

.sidebar.collapsed .section-toggle-icon {
    display: none;
}

.sidebar-control {
    padding: 0.5rem 1rem;
}

.sidebar-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-sidebar);
    opacity: 0.7;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.sidebar-dropdown {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--input-sidebar-border);
    border-radius: 4px;
    font-size: 0.8rem;
    background-color: var(--input-sidebar-bg);
    color: var(--text-sidebar);
    cursor: pointer;
}

.sidebar-dropdown:focus {
    outline: none;
    border-color: var(--accent);
}

.sidebar-dropdown option {
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
}

.sidebar-dropdown:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Filter Lists */
.filter-control {
    margin-top: 0.25rem;
}

.filter-list {
    max-height: 400px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    padding: 0.25rem;
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.4rem;
    font-size: 0.7rem;
    color: var(--text-sidebar);
    cursor: pointer;
    border-radius: 3px;
    transition: background-color 0.2s;
}

.filter-item:hover {
    background: var(--bg-sidebar-hover);
}

.filter-item input[type="checkbox"] {
    width: 12px;
    height: 12px;
    accent-color: var(--accent);
    cursor: pointer;
}

.filter-item label {
    flex: 1;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.filter-item.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.filter-count {
    font-size: 0.6rem;
    color: var(--accent);
    margin-top: 0.25rem;
    text-align: right;
}

/* Collapsible Filter Styles */
.collapsible-filter .filter-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}

.collapsible-filter .filter-toggle-icon {
    font-size: 0.65rem;
    transition: transform 0.2s ease;
    color: var(--text-sidebar);
}

.collapsible-filter.collapsed .filter-toggle-icon {
    transform: rotate(-90deg);
}

.collapsible-filter .filter-content {
    max-height: 400px;
    overflow-y: auto;
    transition: max-height 0.2s ease, opacity 0.2s ease, padding 0.2s ease;
}

.collapsible-filter.collapsed .filter-content {
    max-height: 0;
    overflow: hidden;
    padding: 0;
    opacity: 0;
}

.btn-sidebar {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
    margin-top: 0.5rem;
}

.btn-sidebar:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.btn-sidebar:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background-color: #666;
}

.btn-export {
    flex: 1;
    padding: 0.5rem !important;
    font-size: 0.8rem;
    background-color: var(--bg-tertiary) !important;
    border: 1px solid var(--border) !important;
}

.btn-export:hover {
    background-color: var(--accent) !important;
}

/* Sidebar Radio Group */
.radio-group-sidebar {
    display: flex;
    gap: 0.75rem;
}

.radio-label-sidebar {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--text-sidebar);
    cursor: pointer;
}

.radio-label-sidebar input[type="radio"] {
    width: 12px;
    height: 12px;
    accent-color: var(--accent);
    cursor: pointer;
}

.radio-label-sidebar.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.radio-label-sidebar.disabled input[type="radio"] {
    cursor: not-allowed;
}

.sidebar.collapsed .sidebar-section {
    display: none;
}

.sidebar.collapsed .sidebar-control {
    display: none;
}

.sidebar.collapsed .sidebar-label {
    display: none;
}

/* Time Range Slider */
.time-slider-control {
    margin-top: 0.5rem;
}

.time-range-slider {
    position: relative;
    height: 30px;
    margin: 0.5rem 0;
}

.range-slider {
    position: absolute;
    width: 100%;
    height: 4px;
    background: transparent;
    pointer-events: none;
    -webkit-appearance: none;
    appearance: none;
}

.range-slider::-webkit-slider-runnable-track {
    height: 4px;
    background: var(--input-sidebar-border);
    border-radius: 2px;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    pointer-events: auto;
    margin-top: -6px;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.range-slider::-moz-range-track {
    height: 4px;
    background: var(--input-sidebar-border);
    border-radius: 2px;
}

.range-slider::-moz-range-thumb {
    height: 12px;
    width: 12px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    pointer-events: auto;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.range-min {
    top: 0;
}

.range-max {
    top: 0;
}

.time-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-sidebar);
    opacity: 0.8;
}

.time-range-labels span {
    max-width: 45%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Graph Container */
.graph-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    padding: 0.5rem;
    height: calc(100vh - 180px);
    min-height: 450px;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Graph Legend */
.graph-legend {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    min-width: 120px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
}

.graph-legend:empty {
    display: none;
}

.legend-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.5px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    font-size: 0.75rem;
    color: var(--text-primary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100px;
}

/* Node Tooltip */
.node-tooltip {
    position: absolute;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow);
    pointer-events: none;
    z-index: 100;
    display: none;
    max-width: 200px;
}

.node-tooltip.visible {
    display: block;
}

.tooltip-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.tooltip-dept {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.tooltip-dept-color {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 0.25rem;
    vertical-align: middle;
}

#forceGraphContainer {
    width: 100%;
    flex: 1;
    min-height: 400px;
    height: 100%;
    background-color: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

#forceGraphContainer canvas {
    border-radius: 8px;
}

/* Leaflet Map Container */
#leafletMapContainer {
    border-radius: 8px;
}

.force-graph-overlay {
    background: transparent;
}

.force-graph-overlay canvas {
    background: transparent !important;
}

/* Sankey Chart Container */
.sankey-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    padding: 1rem;
    height: calc(100vh - 240px);
    min-height: 400px;
    position: relative;
    display: none;
}

.sankey-container.active {
    display: block;
}

#sankeyChart {
    width: 100%;
    height: 100%;
    background-color: var(--bg-sidebar);
    border-radius: 8px;
    overflow: hidden;
}

#sankeyChart svg {
    width: 100%;
    height: 100%;
}

.sankey-legend {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    min-width: 120px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
}

.sankey-legend:empty {
    display: none;
}

.sankey-nodes text {
    font-size: 11px;
    fill: var(--text-primary);
    pointer-events: none;
}

body.dark-mode .sankey-nodes text {
    fill: #fff;
}

.sankey-link {
    fill: none;
    stroke-opacity: 0.4;
    transition: stroke-opacity 0.2s;
}

.sankey-link:hover {
    stroke-opacity: 0.7;
}

.sankey-tooltip {
    position: absolute;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow);
    pointer-events: none;
    z-index: 100;
    display: none;
}

.sankey-tooltip.visible {
    display: block;
}

/* Venn Diagram Container */
.venn-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    padding: 1rem;
    height: calc(100vh - 240px);
    min-height: 400px;
    position: relative;
    display: none;
}

.venn-container.active {
    display: block;
}

#vennChart {
    width: 100%;
    height: 100%;
    background-color: var(--bg-sidebar);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

#vennChart svg {
    max-width: 100%;
    max-height: 100%;
}

.venn-legend {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    min-width: 150px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
}

.venn-legend:empty {
    display: none;
}

.venn-stats {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    max-width: 300px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
    font-size: 0.8rem;
}

.venn-stats:empty {
    display: none;
}

.venn-stats-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.5px;
}

.venn-stats-item {
    display: flex;
    justify-content: space-between;
    padding: 0.25rem 0;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

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

.venn-stats-label {
    color: var(--text-secondary);
}

.venn-stats-value {
    font-weight: 600;
    color: var(--accent);
}

.venn-circle {
    fill-opacity: 0.35;
    stroke-width: 2;
    cursor: pointer;
    transition: fill-opacity 0.2s;
}

.venn-circle:hover {
    fill-opacity: 0.5;
}

.venn-circle-label {
    font-size: 14px;
    font-weight: 600;
    fill: var(--text-primary);
    text-anchor: middle;
    pointer-events: none;
}

body.dark-mode .venn-circle-label {
    fill: #fff;
}

.venn-intersection-label {
    font-size: 12px;
    fill: var(--text-primary);
    text-anchor: middle;
    pointer-events: none;
}

body.dark-mode .venn-intersection-label {
    fill: #fff;
}

.venn-tooltip {
    position: absolute;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow);
    pointer-events: none;
    z-index: 100;
    display: none;
    max-width: 250px;
}

.venn-tooltip.visible {
    display: block;
}

/* Time Series / Ridgeline Container */
.timeseries-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    padding: 0.75rem;
    height: calc(100vh - 200px);
    min-height: 450px;
    position: relative;
    display: none;
}

.timeseries-container.active {
    display: block;
}

.timeseries-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 1rem;
    margin-bottom: 0.35rem;
    background-color: var(--bg-primary);
    border-radius: 6px;
}

.period-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.period-buttons {
    display: flex;
    gap: 0.25rem;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    padding: 0.25rem;
}

.period-btn {
    padding: 0.4rem 0.9rem;
    border: none;
    border-radius: 4px;
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.period-btn:hover {
    background-color: var(--border);
    color: var(--text-primary);
}

.period-btn.active {
    background-color: var(--accent);
    color: white;
}

.timeseries-chart {
    width: 100%;
    height: calc(100% - 45px);
    background-color: var(--bg-sidebar);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.timeseries-chart svg {
    width: 100%;
    height: 100%;
}

.timeseries-legend {
    position: absolute;
    top: 4rem;
    right: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    min-width: 150px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
}

.timeseries-legend:empty {
    display: none;
}

/* Ridgeline plot styles */
.ridgeline-area {
    fill-opacity: 0.7;
    stroke-width: 1.5;
    transition: fill-opacity 0.2s;
}

.ridgeline-area:hover {
    fill-opacity: 0.9;
}

.ridgeline-label {
    font-size: 12px;
    font-weight: 500;
    fill: var(--text-primary);
}

body.dark-mode .ridgeline-label {
    fill: #fff;
}

.ridgeline-axis text {
    font-size: 10px;
    fill: var(--text-secondary);
}

body.dark-mode .ridgeline-axis text {
    fill: #888;
}

.ridgeline-axis line,
.ridgeline-axis path {
    stroke: #ccc;
}

.ridgeline-grid line {
    stroke: #ccc;
    stroke-opacity: 0.5;
}

body.dark-mode .ridgeline-axis line,
body.dark-mode .ridgeline-axis path {
    stroke: #444;
}

body.dark-mode .ridgeline-grid line {
    stroke: #333;
}

.timeseries-tooltip {
    position: absolute;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow);
    pointer-events: none;
    z-index: 100;
    display: none;
}

.timeseries-tooltip.visible {
    display: block;
}

/* Timeline Video Controls */
.timeline-controls {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    padding: 1rem 1.5rem;
    margin-top: 1rem;
}

.timeline-progress-container {
    margin-bottom: 0.75rem;
}

.timeline-progress {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

.timeline-progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.timeline-progress::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.timeline-dates {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.timeline-dates span:nth-child(2) {
    font-weight: 600;
    color: var(--accent);
}

.timeline-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.timeline-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, transform 0.1s;
}

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

.timeline-btn:active {
    transform: scale(0.95);
}

.timeline-btn-play {
    width: 50px;
    height: 50px;
    background-color: var(--accent);
    color: white;
    font-size: 1.2rem;
}

.timeline-btn-play:hover {
    background-color: var(--accent-hover);
}

.timeline-speed {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.timeline-speed-select {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
}

.timeline-speed-select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Import Data Page */
.import-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

.import-form {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
}

.radio-group {
    display: flex;
    gap: 1.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.radio-label input[type="radio"] {
    accent-color: var(--accent);
}

.file-drop-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.3s, background-color 0.3s;
    cursor: pointer;
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--accent);
    background-color: rgba(52, 152, 219, 0.05);
}

.file-drop-zone p {
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
    font-size: inherit;
}

.file-name {
    color: var(--accent) !important;
    font-weight: 500;
    margin-top: 1rem !important;
}

.file-drop-zone-small {
    padding: 1rem;
}

.file-drop-zone-small p {
    margin: 0.25rem 0;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-style: italic;
}

/* Datasets Section */
.datasets-section {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
}

.datasets-section h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.datasets-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.no-datasets {
    color: var(--text-secondary);
    font-style: italic;
}

.dataset-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.dataset-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.dataset-info h4 {
    margin: 0 0 0.25rem;
    color: var(--text-primary);
}

.dataset-info p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.dataset-histogram {
    flex-shrink: 0;
    width: 60px;
    height: 32px;
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    background: var(--bg-secondary);
    transition: transform 0.15s, box-shadow 0.15s;
}

.dataset-histogram:hover {
    transform: scale(1.08);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.histogram-bar {
    fill: var(--accent);
    opacity: 0.85;
}

.histogram-modal-content {
    max-width: 600px !important;
    width: 90vw;
}

.histogram-modal-content #histogramModalBody {
    display: flex;
    justify-content: center;
    padding: 0.5rem 0;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-view {
    background-color: var(--accent);
    color: white;
    border: none;
}

.btn-view:hover {
    background-color: var(--accent-hover);
}

.btn-delete {
    background-color: transparent;
    color: var(--error);
    border: 1px solid var(--error);
}

.btn-delete:hover {
    background-color: var(--error);
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-secondary:hover {
    background-color: var(--accent);
    color: white;
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid var(--border);
}

.data-table th {
    background-color: var(--accent);
    color: white;
    font-weight: 500;
    white-space: nowrap;
}

.data-table tr:nth-child(even) {
    background-color: var(--bg-primary);
}

.data-table tr:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

@media (max-width: 768px) {
    .import-container {
        grid-template-columns: 1fr;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar .logo {
        opacity: 0;
        width: 0;
    }

    .sidebar .nav-text {
        opacity: 0;
        width: 0;
    }

    .main-wrapper {
        margin-left: 60px;
    }

    .header {
        padding: 1rem;
    }

    .main-content {
        padding: 1rem;
    }
}

/* Settings Page */
.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.settings-header h2 {
    margin: 0;
}

.workflow-buttons {
    display: flex;
    gap: 0.75rem;
}

.btn-workflow {
    padding: 0.5rem 1rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-workflow:hover {
    background-color: var(--accent-hover);
}

.settings-section {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
    margin-top: 1.5rem;
}

.settings-section h3 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.settings-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Heatmap Chart */
.heatmap-container {
    width: 100%;
    overflow-x: auto;
    border-radius: 8px;
    min-height: 200px;
}

.heatmap-cell {
    stroke-width: 1px;
    transition: opacity 0.15s;
}

.heatmap-label {
    font-size: 11px;
    fill: var(--text-primary);
}

body.dark-mode .heatmap-label {
    fill: #eaeaea;
}

.heatmap-legend {
    font-size: 10px;
    fill: var(--text-secondary);
}

body.dark-mode .heatmap-legend {
    fill: #aaa;
}

.heatmap-tooltip {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    pointer-events: none;
    z-index: 100;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
}

/* Radar Chart */
.radar-container { width: 100%; height: calc(100vh - 180px); min-height: 400px; position: relative; overflow: hidden; }
.radar-grid { stroke: var(--border); fill: none; }
body.dark-mode .radar-grid { stroke: #444; }
.radar-axis-label { font-size: 11px; fill: var(--text-primary); }
body.dark-mode .radar-axis-label { fill: #eaeaea; }
.radar-area { fill-opacity: 0.2; stroke-width: 2; cursor: pointer; }
.radar-area:hover { fill-opacity: 0.4; }
.radar-tooltip {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    pointer-events: none;
    z-index: 100;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
}
.radar-legend-item { font-size: 11px; fill: var(--text-primary); }
body.dark-mode .radar-legend-item { fill: #eaeaea; }

/* Box / Violin Chart */
.boxviolin-container { width: 100%; height: calc(100vh - 180px); min-height: 400px; position: relative; overflow: hidden; }
.boxviolin-box { stroke-width: 1.5; cursor: pointer; }
.boxviolin-violin { stroke-width: 1; }
.boxviolin-median { stroke-width: 2; }
.boxviolin-whisker { stroke-width: 1; stroke-dasharray: 4,2; }
.boxviolin-outlier { stroke-width: 1; }
.boxviolin-label { font-size: 11px; fill: var(--text-primary); }
body.dark-mode .boxviolin-label { fill: #eaeaea; }
.boxviolin-axis-label { font-size: 12px; fill: var(--text-primary); font-weight: 500; }
body.dark-mode .boxviolin-axis-label { fill: #eaeaea; }
.boxviolin-grid { stroke: var(--border); stroke-width: 0.5; }
body.dark-mode .boxviolin-grid { stroke: #444; }
.boxviolin-tooltip {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    pointer-events: none;
    z-index: 100;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
}

/* Chord Diagram */
.chord-container { width: 100%; height: calc(100vh - 180px); min-height: 400px; position: relative; overflow: hidden; }
.chord-arc { stroke-width: 1; cursor: pointer; }
.chord-ribbon { cursor: pointer; }
.chord-label { font-size: 11px; fill: var(--text-primary); }
body.dark-mode .chord-label { fill: #eaeaea; }
.chord-legend-item { font-size: 11px; fill: var(--text-primary); }
body.dark-mode .chord-legend-item { fill: #eaeaea; }
.chord-tooltip {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    pointer-events: none;
    z-index: 100;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
}

/* OWL Chart Selector */
.owl-chart-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.owl-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid var(--border);
    transition: border-color 0.2s, background-color 0.2s;
    text-align: center;
}

.owl-option:hover {
    border-color: var(--accent);
}

.owl-option.selected {
    border-color: var(--accent);
    background-color: rgba(99, 102, 241, 0.1);
}

.owl-option input[type="radio"] {
    display: none;
}

.owl-option-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.owl-option-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-subtitle {
    font-size: 0.7rem;
    font-weight: normal;
    color: var(--text-secondary);
    margin-left: 0.25rem;
}

/* Workflow Modal */
.workflow-modal {
    max-width: 450px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

/* Export Modal */
.export-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.export-option {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.export-option:hover {
    border-color: var(--accent);
}

.export-option input[type="radio"] {
    accent-color: var(--accent);
}

.export-option span {
    font-weight: 500;
    color: var(--text-primary);
}

.export-option small {
    width: 100%;
    padding-left: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.workflow-list {
    max-height: 300px;
    overflow-y: auto;
}

.no-workflows {
    color: var(--text-secondary);
    text-align: center;
    padding: 1rem;
}

.workflow-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border-radius: 6px;
    margin-bottom: 0.5rem;
}

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

.workflow-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.workflow-name {
    font-weight: 500;
    color: var(--text-primary);
}

.workflow-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.workflow-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-workflow-load {
    padding: 0.35rem 0.75rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-workflow-load:hover {
    background-color: var(--accent-hover);
}

.btn-workflow-delete {
    padding: 0.35rem 0.6rem;
    background-color: transparent;
    color: var(--error);
    border: 1px solid var(--error);
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.btn-workflow-delete:hover {
    background-color: var(--error);
    color: white;
}

/* Danger Button */
.btn-danger {
    padding: 0.5rem 1rem;
    background-color: var(--error);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s, opacity 0.2s;
}

.btn-danger:hover {
    opacity: 0.9;
}

/* Graph Settings Page */
.settings-container {
    max-width: 600px;
}

.settings-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.settings-row:last-child {
    border-bottom: none;
}

.settings-label {
    font-weight: 500;
    color: var(--text-primary);
    min-width: 150px;
}

.settings-dropdown {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    min-width: 180px;
}

.settings-dropdown:focus {
    outline: none;
    border-color: var(--accent);
}

.settings-dropdown optgroup {
    font-weight: 600;
    font-style: normal;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.settings-dropdown optgroup option {
    font-weight: 400;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.radio-group-settings {
    display: flex;
    gap: 1.5rem;
}

.radio-label-settings {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
}

.radio-label-settings input[type="radio"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

.settings-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

.radio-label-settings.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.radio-label-settings.disabled input[type="radio"] {
    cursor: not-allowed;
}

/* Physics Sliders */
.slider-row {
    flex-direction: column;
    gap: 0.25rem;
}
.slider-row .settings-label {
    display: flex;
    justify-content: space-between;
    width: 100%;
}
.slider-value {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.settings-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}
.settings-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}
.settings-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

/* ==========================================
   Background Image Settings
   ========================================== */

.bg-image-settings {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.bg-image-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.bg-thumb {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
    overflow: hidden;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s, transform 0.15s;
}

.bg-thumb:hover {
    border-color: var(--accent);
    transform: scale(1.08);
}

.bg-thumb.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

.bg-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bg-preview-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bg-preview-img {
    width: 200px;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.bg-opacity-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    width: 200px;
}

.bg-opacity-row label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
}


/* ==========================================
   License Badge & Upgrade Modal
   ========================================== */

.license-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.license-badge:hover {
    opacity: 0.8;
}

.badge-pro {
    background: #27ae60;
    color: #fff;
}

.badge-trial {
    background: #f39c12;
    color: #fff;
}

.badge-free {
    background: var(--text-secondary);
    color: #fff;
}

/* Upgrade Modal */
.upgrade-modal {
    max-width: 420px;
    text-align: center;
}

.upgrade-modal h2 {
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.upgrade-modal p {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.upgrade-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.license-key-input {
    font-family: monospace;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-align: center;
}

.upgrade-plans {
    display: flex;
    gap: 0.75rem;
    margin: 1rem 0 0.5rem;
}

.upgrade-plan-btn {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--bg-sidebar);
    color: var(--text-primary);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
}

.upgrade-plan-btn:hover {
    border-color: var(--accent);
    background: var(--bg-main);
}

.upgrade-plan-btn.yearly {
    border-color: var(--accent);
}

.upgrade-plan-btn .plan-name {
    display: block;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.upgrade-plan-btn .plan-price {
    display: block;
    font-size: 0.8rem;
    opacity: 0.7;
}

.upgrade-divider {
    display: flex;
    align-items: center;
    margin: 1rem 0 0.75rem;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.upgrade-divider::before,
.upgrade-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.upgrade-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 1rem;
}

.btn-secondary {
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s;
}

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

/* Nav sidebar lock indicator for Pro features */
.nav-pro-locked .nav-text::after {
    content: 'PRO';
    font-size: 0.55rem;
    font-weight: 700;
    background: var(--text-secondary);
    color: #fff;
    padding: 1px 4px;
    border-radius: 3px;
    margin-left: 6px;
    vertical-align: middle;
    letter-spacing: 0.5px;
}

.nav-pro-locked .leaf-text::after {
    content: 'PRO';
    font-size: 0.55rem;
    font-weight: 700;
    background: var(--text-secondary);
    color: #fff;
    padding: 1px 4px;
    border-radius: 3px;
    margin-left: 6px;
    vertical-align: middle;
    letter-spacing: 0.5px;
}

/* ==========================================
   AI Assistant — Chat Panel
   ========================================== */
.ai-chat-panel {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 380px;
    max-height: 560px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow);
    z-index: 1100;
    overflow: hidden;
}
.ai-chat-panel.hidden { display: none; }

.ai-chat-panel--expanded {
    width: calc(100vw - var(--sidebar-width, 260px) - 3rem) !important;
    max-height: calc(100vh - 5rem) !important;
    bottom: 1rem !important;
    right: 1rem !important;
    transition: width 0.25s ease, max-height 0.25s ease;
}

.ai-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--accent);
    color: #fff;
    border-radius: 11px 11px 0 0;
    flex-shrink: 0;
}
.ai-chat-title { font-weight: 600; font-size: 0.95rem; }
.ai-chat-header-actions { display: flex; gap: 0.5rem; }
.ai-chat-action-btn {
    background: none;
    border: none;
    color: rgba(255,255,255,0.85);
    cursor: pointer;
    font-size: 1rem;
    padding: 2px 4px;
    border-radius: 4px;
    line-height: 1;
}
.ai-chat-action-btn:hover {
    background-color: rgba(255,255,255,0.2);
    color: #fff;
}

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    scroll-behavior: smooth;
}
.ai-chat-welcome {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
    margin: auto;
}

.ai-chat-msg {
    padding: 0.6rem 0.85rem;
    border-radius: 10px;
    font-size: 0.875rem;
    line-height: 1.5;
    max-width: 90%;
    word-break: break-word;
}
.ai-chat-msg--user {
    background-color: var(--accent);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 3px;
}
.ai-chat-msg--assistant {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    align-self: flex-start;
    border: 1px solid var(--border);
    border-bottom-left-radius: 3px;
}
.ai-chat-msg--error {
    background-color: rgba(231,76,60,0.1);
    color: var(--error);
    align-self: flex-start;
    border: 1px solid var(--error);
    border-radius: 6px;
    font-size: 0.8rem;
}

.ai-chat-typing {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.5rem 1rem;
    flex-shrink: 0;
}
.ai-chat-typing.hidden { display: none; }
.ai-typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: ai-blink 1.2s infinite ease-in-out;
}
.ai-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes ai-blink {
    0%, 80%, 100% { opacity: 0.2; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

.ai-voice-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-top: 1px solid var(--border);
    background-color: var(--bg-tertiary, var(--bg-secondary));
    flex-shrink: 0;
}

.ai-voice-controls.hidden {
    display: none;
}

.ai-voice-ctrl-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.ai-voice-ctrl-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.ai-voice-ctrl-btn--stop:hover {
    border-color: var(--error);
    color: var(--error);
}

.ai-voice-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    animation: ai-pulse 1.5s infinite;
}

.ai-chat-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    background-color: var(--bg-secondary);
}
.ai-chat-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.875rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}
.ai-chat-input:focus { border-color: var(--accent); }

.ai-send-btn, .ai-mic-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.ai-send-btn:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.ai-mic-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.ai-mic-btn--active {
    background-color: var(--error);
    border-color: var(--error);
    color: #fff;
    animation: ai-pulse 1s infinite;
}
@keyframes ai-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(231,76,60,0.4); }
    50% { box-shadow: 0 0 0 6px rgba(231,76,60,0); }
}

.settings-text-input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-width: 240px;
}
.settings-text-input:focus {
    outline: none;
    border-color: var(--accent);
}
.settings-note {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (max-width: 480px) {
    .ai-chat-panel {
        width: calc(100vw - 2rem);
        right: 1rem;
        bottom: 1rem;
        max-height: 70vh;
    }
}

/* ---- Python Playground Code Blocks ---- */

.py-code-block {
    background: var(--bg-secondary, #f5f5f5);
    border: 1px solid var(--border, #e1e8ed);
    border-radius: 8px;
    padding: 0.5rem;
    margin: 0.5rem 0;
    overflow: hidden;
}
.py-code-block pre {
    margin: 0;
    overflow-x: auto;
    font-size: 0.78rem;
    line-height: 1.4;
    max-height: 300px;
    overflow-y: auto;
}
.py-code-block pre code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    white-space: pre;
}
.py-run-btn {
    background: var(--accent, #3498db);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 14px;
    cursor: pointer;
    margin-top: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    transition: opacity 0.15s;
}
.py-run-btn:hover { opacity: 0.85; }
.py-run-btn:disabled { opacity: 0.5; cursor: wait; }
.py-output { margin-top: 0.5rem; }
.py-output img.py-figure {
    max-width: 100%;
    border-radius: 6px;
    margin-top: 0.25rem;
    border: 1px solid var(--border, #e1e8ed);
}
.py-stdout {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.75rem;
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--bg-primary, #fff);
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border, #e1e8ed);
    max-height: 200px;
    overflow-y: auto;
}
.py-error {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.75rem;
    white-space: pre-wrap;
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.08);
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid rgba(231, 76, 60, 0.2);
}
.py-loading {
    color: var(--text-secondary, #666);
    font-size: 0.75rem;
    font-style: italic;
    padding: 0.25rem 0;
}

/* AI message table styling */
.ai-chat-msg .ai-table {
    border-collapse: collapse;
    font-size: 0.75rem;
    margin: 0.5rem 0;
    width: 100%;
}
.ai-chat-msg .ai-table th,
.ai-chat-msg .ai-table td {
    border: 1px solid var(--border, #e1e8ed);
    padding: 3px 6px;
    text-align: left;
}
.ai-chat-msg .ai-table th {
    background: var(--bg-secondary, #f5f5f5);
    font-weight: 600;
}

/* AI message inline code */
.ai-chat-msg code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.8em;
    background: var(--bg-secondary, #f0f0f0);
    padding: 1px 4px;
    border-radius: 3px;
}
.ai-chat-msg .ai-code-block {
    background: var(--bg-secondary, #f5f5f5);
    border-radius: 6px;
    padding: 0.5rem;
    margin: 0.25rem 0;
    overflow-x: auto;
    font-size: 0.78rem;
}
.ai-chat-msg .ai-code-block code {
    background: none;
    padding: 0;
}

/* Dark mode overrides for playground */
body.dark-mode .py-code-block {
    background: #1a1a2e;
    border-color: #2d2d44;
}
body.dark-mode .py-stdout {
    background: #0d1117;
    border-color: #2d2d44;
}
body.dark-mode .py-error {
    background: rgba(231, 76, 60, 0.15);
    border-color: rgba(231, 76, 60, 0.3);
}
body.dark-mode .ai-chat-msg .ai-table th {
    background: #1a1a2e;
}
body.dark-mode .ai-chat-msg code {
    background: #1a1a2e;
}
body.dark-mode .ai-chat-msg .ai-code-block {
    background: #1a1a2e;
}