/* ========================================
   Decision Intelligence System
   Main Design System & Styles
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Color Palette - Modern Light SaaS Theme */
    --color-bg-primary: #F7F8FB;
    --color-bg-secondary: #FFFFFF;
    --color-bg-tertiary: #FAFBFC;
    --color-bg-elevated: #FFFFFF;
    --color-bg-glass: rgba(255, 255, 255, 0.9);
    
    /* Accent Colors - Professional indigo/purple */
    --color-accent-primary: #4F46E5;
    --color-accent-secondary: #7C3AED;
    --color-accent-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    --color-accent-hover: #4338CA;
    
    /* Health Colors - Vibrant but professional */
    --color-healthy: #22C55E;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-healthy-bg: rgba(34, 197, 94, 0.08);
    --color-warning-bg: rgba(245, 158, 11, 0.08);
    --color-danger-bg: rgba(239, 68, 68, 0.08);
    
    /* Node Type Colors */
    --color-node-goal: #4F46E5;
    --color-node-option: #3B82F6;
    --color-node-priority: #7C3AED;
    --color-node-assumption: #F59E0B;
    --color-node-confidence: #22C55E;
    --color-node-risk: #EF4444;
    
    /* Text Colors - Dark on light */
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    
    /* Border & Shadow - Subtle on light backgrounds */
    --color-border: rgba(107, 114, 128, 0.15);
    --color-border-hover: rgba(107, 114, 128, 0.25);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    --shadow-glow-hover: 0 0 0 4px rgba(79, 70, 229, 0.16);
    
    /* Spacing - More generous for premium feel */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 40px;
    
    /* Typography - Clearer hierarchy */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    
    /* Font Weights - Refined usage */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Transitions - Smooth, consistent */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Borders - More rounded for modern feel */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Panel Widths */
    --panel-left-width: 240px;
    --panel-right-width: 400px;
    
    /* Sidebar Width */
    --sidebar-width: 240px;
    --sidebar-width-collapsed: 60px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

/* App Container - Sidebar + Main Content Layout */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Hamburger Toggle Button */
.hamburger-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 250ms ease-in-out;
    box-shadow: var(--shadow-sm);
}

.hamburger-toggle:hover {
    background: var(--color-bg-secondary);
    transform: scale(1.05);
}

.hamburger-toggle svg {
    color: var(--color-text-primary);
    transition: transform 250ms ease-in-out;
}

.sidebar:not(.collapsed) ~ .hamburger-toggle svg {
    transform: rotate(90deg);
}

/* Sidebar Navigation */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 250ms ease-in-out;
}

.sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
}

.sidebar-brand {
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.sidebar.collapsed .sidebar-brand {
    padding: var(--spacing-lg) var(--spacing-sm);
    justify-content: center;
}

.sidebar-brand svg {
    color: var(--color-accent-primary);
    flex-shrink: 0;
}

.brand-text {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    opacity: 1;
    transition: opacity 150ms ease-in-out;
}

.sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
}

.sidebar-nav {
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.sidebar.collapsed .sidebar-nav {
    padding: var(--spacing-lg) var(--spacing-xs);
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--spacing-md);
}

.nav-item svg {
    flex-shrink: 0;
}

.nav-item span {
    white-space: nowrap;
    overflow: hidden;
    opacity: 1;
    transition: opacity 150ms ease-in-out;
}

.sidebar.collapsed .nav-item span {
    opacity: 0;
    width: 0;
}

/* Tooltip for collapsed nav items */
.sidebar.collapsed .nav-item::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    margin-left: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 150ms ease-in-out;
    z-index: 1000;
}

.sidebar.collapsed .nav-item:hover::after {
    opacity: 1;
}

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

.nav-item.active {
    background: var(--color-accent-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.nav-item svg {
    flex-shrink: 0;
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-bg-primary);
}

/* Page Container */
.page {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
}

.page.active {
    display: flex;
}

.page-header {
    padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Decisions Page Workspace */
.decisions-workspace {
    display: grid;
    grid-template-columns: var(--panel-left-width) 1fr var(--panel-right-width);
    height: 100%;
    gap: 1px;
    background: var(--color-border);
}

/* Panel Base Styles (for Decisions page) */
.panel {
    background: var(--color-bg-secondary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
}

.panel-header h2 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.panel-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
}

/* Left Panel - Decision List */
.panel-left {
    border-right: 1px solid var(--color-border);
}

.btn-new-decision {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-new-decision:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-hover);
}

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

.segment-tabs {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.segment-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.segment-tab:hover {
    color: var(--color-text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.segment-tab.active {
    background: var(--color-accent-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.decision-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.decision-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.decision-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-healthy);
    transition: all var(--transition-base);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.decision-card.warning::before {
    background: var(--color-warning);
}

.decision-card.danger::before {
    background: var(--color-danger);
}

.decision-card:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-border-hover);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.decision-card.active {
    background: var(--color-bg-elevated);
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 1px var(--color-accent-primary), var(--shadow-md);
}

.decision-card-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.decision-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.decision-card-score {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
}

.health-summary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.health-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-muted);
    transition: all var(--transition-base);
}

.health-dot.healthy {
    background: var(--color-healthy);
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.2);
}

.health-dot.warning {
    background: var(--color-warning);
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.health-dot.danger {
    background: var(--color-danger);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

/* Center Panel - Tree Visualization */
.panel-center {
    background: var(--color-bg-primary);
    position: relative;
}

.tree-header {
    padding: var(--spacing-lg) var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 10;
}

.tree-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.tree-title h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.health-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-healthy-bg);
    border: 1.5px solid var(--color-healthy);
    border-radius: var(--radius-lg);
    min-width: 80px;
    transition: all var(--transition-base);
}

.health-badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.health-badge.warning {
    background: var(--color-warning-bg);
    border-color: var(--color-warning);
}

.health-badge.danger {
    background: var(--color-danger-bg);
    border-color: var(--color-danger);
}

.health-score {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-healthy);
    line-height: 1;
}

.health-badge.warning .health-score {
    color: var(--color-warning);
}

.health-badge.danger .health-score {
    color: var(--color-danger);
}

.health-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 2px;
}

.tree-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-icon:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    border-color: var(--color-accent-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.tree-canvas {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#treeSvg {
    width: 100%;
    height: 100%;
    cursor: grab;
}

#treeSvg:active {
    cursor: grabbing;
}

.empty-state {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--color-text-muted);
    pointer-events: none;
    max-width: 320px;
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    margin-bottom: var(--spacing-xl);
    opacity: 0.4;
}

.empty-icon svg {
    stroke: var(--color-accent-primary);
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.empty-state p {
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--color-text-muted);
}

.tree-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) var(--spacing-2xl);
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.legend-dot.goal { background: var(--color-node-goal); }
.legend-dot.option { background: var(--color-node-option); }
.legend-dot.priority { background: var(--color-node-priority); }
.legend-dot.assumption { background: var(--color-node-assumption); }
.legend-dot.confidence { background: var(--color-node-confidence); }
.legend-dot.risk { background: var(--color-node-risk); }

/* Right Panel - AI Copilot */
.panel-right {
    border-left: 1px solid var(--color-border);
}

.copilot-identity {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.copilot-avatar {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-lg);
    color: white;
    box-shadow: var(--shadow-sm);
}

.copilot-status {
    font-size: var(--font-size-xs);
    color: var(--color-healthy);
    font-weight: var(--font-weight-medium);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 1000;
}

.toast {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 420px;
    backdrop-filter: blur(8px);
}

.toast.warning {
    border-left: 3px solid var(--color-warning);
    background: var(--color-warning-bg);
}

.toast.danger {
    border-left: 3px solid var(--color-danger);
    background: var(--color-danger-bg);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

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

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-full);
}

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

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

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

.fade-in {
    animation: fadeIn var(--transition-base);
}

/* ========================================
   Intelligence Layer Styles
   ======================================== */

/* Health Container */
.health-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Lifecycle Badge */
.lifecycle-badge {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: var(--color-bg-tertiary);
    border: 1.5px solid var(--color-border);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.lifecycle-badge.fresh {
    background: rgba(79, 70, 229, 0.08);
    border-color: rgba(79, 70, 229, 0.3);
    color: #4F46E5;
}

.lifecycle-badge.stable {
    background: rgba(34, 197, 94, 0.08);
    border-color: rgba(34, 197, 94, 0.3);
    color: #22C55E;
}

.lifecycle-badge.at-risk {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.3);
    color: #F59E0B;
}

.lifecycle-badge.stale {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
    color: #EF4444;
}

/* Decision Meta Info */
.decision-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.meta-created, .meta-reviewed {
    display: flex;
    align-items: center;
    gap: 4px;
}

.meta-reviewed.overdue {
    color: var(--color-warning);
}

/* Decision Actions */
.decision-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.action-btn:hover {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

/* Timeline Section */
.timeline-section {
    border-bottom: 1px solid var(--color-border);
    max-height: 200px;
    overflow: hidden;
}

.timeline-section.expanded {
    max-height: 400px;
}

.timeline-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    cursor: pointer;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    border-radius: var(--radius-sm);
}

.timeline-header:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
}

.timeline-events {
    padding: var(--spacing-sm) var(--spacing-md);
    max-height: 150px;
    overflow-y: auto;
}

.timeline-event {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    font-size: 11px;
    color: var(--color-text-muted);
    border-left: 2px solid var(--color-border);
    padding-left: var(--spacing-sm);
    margin-left: 4px;
}

.timeline-event:first-child {
    border-left-color: var(--color-accent-primary);
}

.timeline-event-icon {
    flex-shrink: 0;
}

.timeline-event-text {
    flex: 1;
}

.timeline-event-time {
    color: var(--color-text-muted);
    font-size: 10px;
}

/* Confidence Modal */
.confidence-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(17, 24, 39, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.confidence-modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 300px;
    box-shadow: var(--shadow-lg);
}

.confidence-modal h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.confidence-slider {
    width: 100%;
    margin: var(--spacing-md) 0;
}

.confidence-modal-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.confidence-modal-buttons button {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

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

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

/* Health Meta Group */
.health-meta-group {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.health-summary-text {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 4px;
    font-weight: 500;
}

/* Node Hover Micro-Feedback */
.tree-node {
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.tree-node:hover {
    filter: brightness(1.1);
}

.tree-node rect {
    transition: stroke-width var(--transition-fast), filter var(--transition-fast);
}

.tree-node:hover rect {
    stroke: rgba(255, 255, 255, 0.4);
    stroke-width: 2px;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.2));
}

/* Secondary Action Button */
.action-btn-secondary {
    background: transparent;
    border: 1.5px dashed var(--color-border);
    color: var(--color-text-secondary);
}

.action-btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-style: solid;
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

/* ========================================
   Decision Insights Modal
   ======================================== */

.insights-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.insights-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    width: 380px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.25s ease;
}

.insights-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background: var(--color-bg-secondary);
    z-index: 1;
}

.insights-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.insights-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 18px;
}

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

.insights-body {
    padding: var(--spacing-lg);
}

.insight-section {
    margin-bottom: var(--spacing-lg);
}

.insight-section:last-child {
    margin-bottom: 0;
}

.insight-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.insight-content {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    line-height: 1.6;
}

.insight-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
}

.insight-stat-value {
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.insight-stat-label {
    color: var(--color-text-secondary);
}

/* Insight Status Colors */
.insight-healthy {
    color: var(--color-healthy);
}

.insight-warning {
    color: var(--color-warning);
}

.insight-danger {
    color: var(--color-danger);
}

.insight-neutral {
    color: var(--color-text-secondary);
}

/* Insight Badges */
.insight-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
}

.insight-badge.healthy {
    background: var(--color-healthy-bg);
    color: #16A34A;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.insight-badge.warning {
    background: var(--color-warning-bg);
    color: #D97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.insight-badge.danger {
    background: var(--color-danger-bg);
    color: #DC2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Insight List */
.insight-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.insight-list li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 13px;
}

.insight-list li::before {
    content: '•';
    color: var(--color-text-muted);
}

/* Drift Indicator */
.drift-indicator {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.drift-indicator.weakening {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.25);
    color: #D97706;
}

.drift-indicator.stable {
    background: rgba(34, 197, 94, 0.08);
    border: 1px solid rgba(34, 197, 94, 0.25);
    color: #16A34A;
}

.drift-indicator.critical {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #DC2626;
}

/* ========================================
   Dashboard Page Styles
   ======================================== */

.overview-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent-primary);
}

.stat-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.stat-card.healthy .stat-value {
    color: var(--color-healthy);
}

.stat-card.at-risk .stat-value {
    color: var(--color-warning);
}

.stat-card.stale .stat-value {
    color: var(--color-danger);
}

.dashboard-section {
    padding: 0 var(--spacing-2xl) var(--spacing-2xl);
}

.dashboard-section h2 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.activity-list {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.activity-item {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: background var(--transition-base);
}

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

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

.activity-icon {
    flex-shrink: 0;
    font-size: 18px;
}

.activity-content {
    flex: 1;
}

.activity-decision {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.activity-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.activity-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.empty-state-small {
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ========================================
   Insights Page Styles
   ======================================== */

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-2xl);
}

.insight-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.insight-card h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.insight-card-content {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.distribution-bar {
    display: flex;
    height: 8px;
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--spacing-md) 0;
    background: var(--color-bg-tertiary);
}

.distribution-segment {
    transition: width var(--transition-base);
}

.distribution-segment.healthy {
    background: var(--color-healthy);
}

.distribution-segment.warning {
    background: var(--color-warning);
}

.distribution-segment.danger {
    background: var(--color-danger);
}

.distribution-legend {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.legend-item-insights {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.legend-dot-insights {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.conflict-item {
    padding: var(--spacing-md);
    background: var(--color-warning-bg);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

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

/* ========================================
   Timeline Page Styles
   ======================================== */

.timeline-page-content {
    padding: var(--spacing-2xl);
}

.global-timeline {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.timeline-item {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-lg);
    transition: background var(--transition-base);
}

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

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

.timeline-item-icon {
    flex-shrink: 0;
    font-size: 20px;
}

.timeline-item-content {
    flex: 1;
    min-width: 0;
}

.timeline-item-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: 4px;
}

.timeline-item-decision {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.timeline-item-type {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-item-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.timeline-item-time {
    flex-shrink: 0;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    align-self: flex-start;
}


/* Context Toggle */
.context-toggle {
    display: flex;
    gap: 4px;
    background: var(--color-bg-tertiary);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.toggle-btn {
    padding: 6px 14px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.toggle-btn:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.toggle-btn.active {
    background: var(--color-accent-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

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