/**
 * PgMP Document Comparison - Main Stylesheet
 * Premium Interactive Comparison between Business Case, Program Charter, and Program Management Plan
 */

/* ========================================
   CSS Variables / Design Tokens
   ======================================== */
:root {
    /* Document Colors */
    --pgmp-bc-color: #3B82F6;
    --pgmp-bc-light: #DBEAFE;
    --pgmp-bc-dark: #1E40AF;
    
    --pgmp-pc-color: #10B981;
    --pgmp-pc-light: #D1FAE5;
    --pgmp-pc-dark: #047857;
    
    --pgmp-pmp-color: #F97316;
    --pgmp-pmp-light: #FFEDD5;
    --pgmp-pmp-dark: #C2410C;
    
    /* Classification Colors */
    --pgmp-shared-all: #8B5CF6;
    --pgmp-shared-all-light: #EDE9FE;
    --pgmp-shared-two: #F59E0B;
    --pgmp-shared-two-light: #FEF3C7;
    --pgmp-unique: #6B7280;
    
    /* UI Colors */
    --pgmp-bg: #FAFBFC;
    --pgmp-surface: #FFFFFF;
    --pgmp-border: #E5E7EB;
    --pgmp-text: #1F2937;
    --pgmp-text-muted: #6B7280;
    --pgmp-shadow: rgba(0, 0, 0, 0.1);
    --pgmp-shadow-lg: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --pgmp-spacing-xs: 4px;
    --pgmp-spacing-sm: 8px;
    --pgmp-spacing-md: 16px;
    --pgmp-spacing-lg: 24px;
    --pgmp-spacing-xl: 32px;
    --pgmp-spacing-2xl: 48px;
    
    /* Border Radius */
    --pgmp-radius-sm: 4px;
    --pgmp-radius-md: 8px;
    --pgmp-radius-lg: 12px;
    --pgmp-radius-xl: 16px;
    --pgmp-radius-full: 9999px;
    
    /* Transitions */
    --pgmp-transition-fast: 150ms ease;
    --pgmp-transition-normal: 250ms ease;
    --pgmp-transition-slow: 400ms ease-out;
    
    /* Z-index layers */
    --pgmp-z-base: 1;
    --pgmp-z-connections: 5;
    --pgmp-z-atoms: 10;
    --pgmp-z-tooltip: 100;
    --pgmp-z-inspector: 200;
    --pgmp-z-modal: 300;
}

/* Dark Theme */
.pgmp-doc-comparison.theme-dark {
    --pgmp-bg: #111827;
    --pgmp-surface: #1F2937;
    --pgmp-border: #374151;
    --pgmp-text: #F9FAFB;
    --pgmp-text-muted: #9CA3AF;
    --pgmp-shadow: rgba(0, 0, 0, 0.3);
}

/* ========================================
   Base Container
   ======================================== */
.pgmp-doc-comparison {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--pgmp-bg);
    color: var(--pgmp-text);
    padding: var(--pgmp-spacing-lg);
    border-radius: var(--pgmp-radius-xl);
    position: relative;
    min-height: 800px;
    overflow: hidden;
}

.pgmp-doc-comparison *,
.pgmp-doc-comparison *::before,
.pgmp-doc-comparison *::after {
    box-sizing: border-box;
}

/* ========================================
   Loading State
   ======================================== */
.pgmp-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    gap: var(--pgmp-spacing-md);
}

.pgmp-loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--pgmp-border);
    border-top-color: var(--pgmp-shared-all);
    border-radius: 50%;
    animation: pgmp-spin 1s linear infinite;
}

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

/* ========================================
   Header Section
   ======================================== */
.pgmp-header {
    text-align: center;
    margin-bottom: var(--pgmp-spacing-xl);
}

.pgmp-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--pgmp-text);
    margin: 0 0 var(--pgmp-spacing-xs) 0;
}

.pgmp-subtitle {
    font-size: 1rem;
    color: var(--pgmp-text-muted);
    margin: 0 0 var(--pgmp-spacing-lg) 0;
}

/* Semantic Learning Cue */
.pgmp-semantic-cue {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--pgmp-spacing-md);
    flex-wrap: wrap;
    padding: var(--pgmp-spacing-md);
    background: var(--pgmp-surface);
    border-radius: var(--pgmp-radius-lg);
    box-shadow: 0 2px 8px var(--pgmp-shadow);
}

.pgmp-cue-item {
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
    padding: var(--pgmp-spacing-sm) var(--pgmp-spacing-md);
    border-radius: var(--pgmp-radius-md);
    transition: transform var(--pgmp-transition-fast), box-shadow var(--pgmp-transition-fast);
}

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

.pgmp-cue-bc { background: var(--pgmp-bc-light); border-left: 3px solid var(--pgmp-bc-color); }
.pgmp-cue-pc { background: var(--pgmp-pc-light); border-left: 3px solid var(--pgmp-pc-color); }
.pgmp-cue-pmp { background: var(--pgmp-pmp-light); border-left: 3px solid var(--pgmp-pmp-color); }

.pgmp-cue-icon {
    font-size: 1.25rem;
}

.pgmp-cue-label {
    font-weight: 600;
    font-size: 0.875rem;
}

.pgmp-cue-desc {
    font-size: 0.75rem;
    color: var(--pgmp-text-muted);
    font-style: italic;
}

.pgmp-cue-arrow {
    color: var(--pgmp-text-muted);
    font-size: 1.5rem;
    font-weight: 300;
}

/* ========================================
   Toolbar
   ======================================== */
.pgmp-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pgmp-spacing-lg);
    margin-bottom: var(--pgmp-spacing-xl);
    padding: var(--pgmp-spacing-md);
    background: var(--pgmp-surface);
    border-radius: var(--pgmp-radius-lg);
    box-shadow: 0 2px 8px var(--pgmp-shadow);
}

.pgmp-toolbar-section {
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
    flex-wrap: wrap;
}

.pgmp-toolbar-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--pgmp-text-muted);
    letter-spacing: 0.05em;
}

.pgmp-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pgmp-spacing-xs);
}

.pgmp-btn {
    padding: var(--pgmp-spacing-sm) var(--pgmp-spacing-md);
    border: 1px solid var(--pgmp-border);
    background: var(--pgmp-surface);
    color: var(--pgmp-text);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--pgmp-radius-md);
    cursor: pointer;
    transition: all var(--pgmp-transition-fast);
    white-space: nowrap;
}

.pgmp-btn:hover {
    background: var(--pgmp-bg);
    border-color: var(--pgmp-text-muted);
}

.pgmp-btn.active {
    background: var(--pgmp-shared-all);
    border-color: var(--pgmp-shared-all);
    color: white;
}

.pgmp-btn-exam {
    background: linear-gradient(135deg, #EF4444, #F97316);
    border-color: transparent;
    color: white;
}

.pgmp-btn-exam:hover {
    background: linear-gradient(135deg, #DC2626, #EA580C);
    border-color: transparent;
}

.pgmp-btn-exam.active {
    background: linear-gradient(135deg, #B91C1C, #C2410C);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.3);
}

.pgmp-filter-group {
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: var(--pgmp-spacing-xs);
}

/* ========================================
   Comparison Canvas
   ======================================== */
.pgmp-comparison-canvas {
    position: relative;
    min-height: 500px;
    margin-bottom: var(--pgmp-spacing-xl);
}

/* SVG Connection Layer */
.pgmp-connection-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: var(--pgmp-z-connections);
}

.pgmp-connection-layer path {
    fill: none;
    stroke-width: 2;
    opacity: 0.6;
    transition: all var(--pgmp-transition-normal);
}

.pgmp-connection-layer path.active {
    stroke-width: 3;
    opacity: 1;
    filter: url(#glow);
}

.pgmp-connection-layer path.shared-all {
    stroke: url(#gradient-shared-all);
    stroke-dasharray: none;
}

.pgmp-connection-layer path.shared-two {
    stroke: url(#gradient-shared-two);
    stroke-dasharray: 8 4;
}

/* Columns Container */
.pgmp-columns-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: var(--pgmp-spacing-md);
    position: relative;
    z-index: var(--pgmp-z-atoms);
}

/* Document Columns */
.pgmp-document-column {
    background: var(--pgmp-surface);
    border-radius: var(--pgmp-radius-lg);
    box-shadow: 0 4px 16px var(--pgmp-shadow);
    overflow: hidden;
    transition: transform var(--pgmp-transition-normal), box-shadow var(--pgmp-transition-normal);
}

.pgmp-document-column:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--pgmp-shadow-lg);
}

.pgmp-column-header {
    padding: var(--pgmp-spacing-md);
    text-align: center;
    border-bottom: 1px solid var(--pgmp-border);
}

.pgmp-col-bc .pgmp-column-header { background: linear-gradient(135deg, var(--pgmp-bc-light), white); }
.pgmp-col-pc .pgmp-column-header { background: linear-gradient(135deg, var(--pgmp-pc-light), white); }
.pgmp-col-pmp .pgmp-column-header { background: linear-gradient(135deg, var(--pgmp-pmp-light), white); }

.pgmp-column-icon {
    font-size: 2rem;
    margin-bottom: var(--pgmp-spacing-xs);
}

.pgmp-column-title {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 var(--pgmp-spacing-xs) 0;
}

.pgmp-col-bc .pgmp-column-title { color: var(--pgmp-bc-dark); }
.pgmp-col-pc .pgmp-column-title { color: var(--pgmp-pc-dark); }
.pgmp-col-pmp .pgmp-column-title { color: var(--pgmp-pmp-dark); }

.pgmp-column-subtitle {
    font-size: 0.75rem;
    color: var(--pgmp-text-muted);
    font-style: italic;
}

.pgmp-column-content {
    padding: var(--pgmp-spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

/* Shared Zones */
.pgmp-shared-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: var(--pgmp-spacing-sm);
    min-width: 120px;
}

.pgmp-shared-zone.hidden {
    display: none;
}

.pgmp-zone-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--pgmp-shared-two);
    letter-spacing: 0.05em;
    margin-bottom: var(--pgmp-spacing-sm);
    text-align: center;
}

.pgmp-zone-atoms {
    display: flex;
    flex-direction: column;
    gap: var(--pgmp-spacing-xs);
}

/* Core Zone (Shared by All 3) */
.pgmp-core-zone {
    background: linear-gradient(135deg, var(--pgmp-shared-all-light), white);
    border: 2px solid var(--pgmp-shared-all);
    border-radius: var(--pgmp-radius-xl);
    padding: var(--pgmp-spacing-lg);
    margin-top: var(--pgmp-spacing-xl);
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.2);
}

.pgmp-core-zone.hidden {
    display: none;
}

.pgmp-core-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--pgmp-spacing-sm);
    margin-bottom: var(--pgmp-spacing-md);
}

.pgmp-core-icon {
    font-size: 1.5rem;
}

.pgmp-core-header h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--pgmp-shared-all);
    margin: 0;
}

.pgmp-core-atoms {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pgmp-spacing-xs);
    justify-content: center;
}

/* Diagonal Zone (BC + PMP) */
.pgmp-diagonal-zone {
    background: var(--pgmp-shared-two-light);
    border: 1px dashed var(--pgmp-shared-two);
    border-radius: var(--pgmp-radius-lg);
    padding: var(--pgmp-spacing-md);
    margin-top: var(--pgmp-spacing-md);
}

.pgmp-diagonal-zone.hidden {
    display: none;
}

/* ========================================
   Content Atoms (Cards)
   ======================================== */
.pgmp-atom {
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
    padding: var(--pgmp-spacing-sm) var(--pgmp-spacing-md);
    background: var(--pgmp-surface);
    border: 1px solid var(--pgmp-border);
    border-radius: var(--pgmp-radius-md);
    cursor: pointer;
    transition: all var(--pgmp-transition-fast);
    font-size: 0.8125rem;
    position: relative;
}

.pgmp-atom:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 12px var(--pgmp-shadow);
}

.pgmp-atom.active {
    transform: scale(1.02);
    box-shadow: 0 4px 16px var(--pgmp-shadow-lg);
    z-index: calc(var(--pgmp-z-atoms) + 1);
}

.pgmp-atom.dimmed {
    opacity: 0.3;
    pointer-events: none;
}

/* Atom color variations by document */
.pgmp-atom[data-document="business_case"] {
    border-left: 3px solid var(--pgmp-bc-color);
}

.pgmp-atom[data-document="program_charter"] {
    border-left: 3px solid var(--pgmp-pc-color);
}

.pgmp-atom[data-document="program_management_plan"] {
    border-left: 3px solid var(--pgmp-pmp-color);
}

/* Atom color variations by classification */
.pgmp-atom.shared-all {
    border-left: 3px solid var(--pgmp-shared-all);
    background: var(--pgmp-shared-all-light);
}

.pgmp-atom.shared-all::after {
    content: '';
    position: absolute;
    top: 50%;
    right: var(--pgmp-spacing-sm);
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--pgmp-shared-all);
    animation: pgmp-pulse 2s ease-in-out infinite;
}

.pgmp-atom.shared-two {
    border-left: 3px solid var(--pgmp-shared-two);
    border-style: dashed solid solid solid;
}

.pgmp-atom.unique {
    background: white;
}

.pgmp-atom.exam-highlight {
    animation: pgmp-exam-pulse 1.5s ease-in-out infinite;
    border-color: #EF4444;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

@keyframes pgmp-pulse {
    0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
    50% { opacity: 0.5; transform: translateY(-50%) scale(1.5); }
}

@keyframes pgmp-exam-pulse {
    0%, 100% { box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2); }
    50% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0.4); }
}

.pgmp-atom-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.pgmp-atom-label {
    flex: 1;
    font-weight: 500;
    line-height: 1.3;
}

/* Mini atoms for shared zones */
.pgmp-atom-mini {
    padding: var(--pgmp-spacing-xs) var(--pgmp-spacing-sm);
    font-size: 0.6875rem;
}

.pgmp-atom-mini .pgmp-atom-icon {
    font-size: 0.75rem;
}

/* ========================================
   Summary Bands
   ======================================== */
.pgmp-summary-bands {
    display: flex;
    flex-direction: column;
    gap: var(--pgmp-spacing-md);
    margin-top: var(--pgmp-spacing-xl);
    margin-bottom: var(--pgmp-spacing-xl);
}

.pgmp-summary-band {
    background: var(--pgmp-surface);
    border-radius: var(--pgmp-radius-lg);
    padding: var(--pgmp-spacing-md);
    box-shadow: 0 2px 8px var(--pgmp-shadow);
}

.pgmp-summary-band h4 {
    font-size: 0.875rem;
    font-weight: 700;
    margin: 0 0 var(--pgmp-spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
}

.pgmp-band-icon {
    font-size: 1rem;
}

.pgmp-band-unique h4 { color: var(--pgmp-unique); }
.pgmp-band-shared-two h4 { color: var(--pgmp-shared-two); }
.pgmp-band-shared-all h4 { color: var(--pgmp-shared-all); }

.pgmp-band-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pgmp-spacing-md);
}

.pgmp-band-section {
    flex: 1;
    min-width: 200px;
}

.pgmp-band-section strong {
    font-size: 0.75rem;
    display: block;
    margin-bottom: var(--pgmp-spacing-xs);
}

.pgmp-bc-color { color: var(--pgmp-bc-color); }
.pgmp-pc-color { color: var(--pgmp-pc-color); }
.pgmp-pmp-color { color: var(--pgmp-pmp-color); }

.pgmp-band-items {
    font-size: 0.8125rem;
    color: var(--pgmp-text-muted);
    line-height: 1.5;
}

/* ========================================
   Inspector Panel
   ======================================== */
.pgmp-inspector-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 380px;
    height: 100vh;
    background: var(--pgmp-surface);
    box-shadow: -4px 0 24px var(--pgmp-shadow-lg);
    z-index: var(--pgmp-z-inspector);
    transition: right var(--pgmp-transition-slow);
    overflow-y: auto;
}

.pgmp-inspector-panel.open {
    right: 0;
}

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

.pgmp-inspector-title {
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
}

.pgmp-inspector-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--pgmp-text-muted);
    cursor: pointer;
    border-radius: var(--pgmp-radius-full);
    transition: all var(--pgmp-transition-fast);
}

.pgmp-inspector-close:hover {
    background: var(--pgmp-bg);
    color: var(--pgmp-text);
}

.pgmp-inspector-content {
    padding: var(--pgmp-spacing-lg);
}

.pgmp-inspector-placeholder {
    text-align: center;
    padding: var(--pgmp-spacing-2xl) var(--pgmp-spacing-lg);
    color: var(--pgmp-text-muted);
}

.pgmp-inspector-placeholder .pgmp-inspector-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--pgmp-spacing-md);
}

/* Inspector Content when atom selected */
.pgmp-inspector-atom-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 var(--pgmp-spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
}

.pgmp-inspector-classification {
    display: inline-flex;
    align-items: center;
    gap: var(--pgmp-spacing-xs);
    padding: var(--pgmp-spacing-xs) var(--pgmp-spacing-sm);
    border-radius: var(--pgmp-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--pgmp-spacing-md);
}

.pgmp-inspector-classification.shared-all {
    background: var(--pgmp-shared-all-light);
    color: var(--pgmp-shared-all);
}

.pgmp-inspector-classification.shared-two {
    background: var(--pgmp-shared-two-light);
    color: var(--pgmp-shared-two);
}

.pgmp-inspector-classification.unique {
    background: var(--pgmp-bg);
    color: var(--pgmp-unique);
}

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

.pgmp-inspector-section h5 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--pgmp-text-muted);
    margin: 0 0 var(--pgmp-spacing-sm) 0;
}

.pgmp-inspector-docs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pgmp-spacing-xs);
}

.pgmp-inspector-doc-badge {
    padding: var(--pgmp-spacing-xs) var(--pgmp-spacing-sm);
    border-radius: var(--pgmp-radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
}

.pgmp-inspector-doc-badge.bc {
    background: var(--pgmp-bc-light);
    color: var(--pgmp-bc-dark);
}

.pgmp-inspector-doc-badge.pc {
    background: var(--pgmp-pc-light);
    color: var(--pgmp-pc-dark);
}

.pgmp-inspector-doc-badge.pmp {
    background: var(--pgmp-pmp-light);
    color: var(--pgmp-pmp-dark);
}

.pgmp-inspector-descriptions {
    display: flex;
    flex-direction: column;
    gap: var(--pgmp-spacing-md);
}

.pgmp-inspector-desc-item {
    padding: var(--pgmp-spacing-md);
    background: var(--pgmp-bg);
    border-radius: var(--pgmp-radius-md);
    border-left: 3px solid var(--pgmp-border);
}

.pgmp-inspector-desc-item.bc { border-left-color: var(--pgmp-bc-color); }
.pgmp-inspector-desc-item.pc { border-left-color: var(--pgmp-pc-color); }
.pgmp-inspector-desc-item.pmp { border-left-color: var(--pgmp-pmp-color); }

.pgmp-inspector-desc-label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--pgmp-spacing-xs);
    display: block;
}

.pgmp-inspector-desc-label.bc { color: var(--pgmp-bc-dark); }
.pgmp-inspector-desc-label.pc { color: var(--pgmp-pc-dark); }
.pgmp-inspector-desc-label.pmp { color: var(--pgmp-pmp-dark); }

.pgmp-inspector-desc-text {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--pgmp-text);
}

.pgmp-inspector-reference {
    font-size: 0.75rem;
    color: var(--pgmp-text-muted);
    font-style: italic;
}

/* ========================================
   Legend
   ======================================== */
.pgmp-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--pgmp-spacing-md);
    padding: var(--pgmp-spacing-md);
    background: var(--pgmp-surface);
    border-radius: var(--pgmp-radius-lg);
    box-shadow: 0 2px 8px var(--pgmp-shadow);
}

.pgmp-legend-item {
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
    font-size: 0.75rem;
}

.pgmp-legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--pgmp-radius-sm);
}

.pgmp-legend-bc { background: var(--pgmp-bc-color); }
.pgmp-legend-pc { background: var(--pgmp-pc-color); }
.pgmp-legend-pmp { background: var(--pgmp-pmp-color); }
.pgmp-legend-shared-all { background: var(--pgmp-shared-all); }
.pgmp-legend-shared-two { background: var(--pgmp-shared-two); border: 2px dashed var(--pgmp-shared-two); }

.pgmp-legend-separator {
    width: 1px;
    height: 20px;
    background: var(--pgmp-border);
    margin: 0 var(--pgmp-spacing-sm);
}

/* ========================================
   Intro Animation
   ======================================== */
.pgmp-intro-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--pgmp-z-modal);
    opacity: 1;
    transition: opacity var(--pgmp-transition-slow);
}

.pgmp-intro-animation.hidden {
    opacity: 0;
    pointer-events: none;
}

#pgmp-lottie-container {
    width: 400px;
    height: 400px;
    max-width: 90vw;
    max-height: 90vh;
}

/* ========================================
   Tooltips
   ======================================== */
.pgmp-tooltip {
    position: absolute;
    background: var(--pgmp-text);
    color: white;
    padding: var(--pgmp-spacing-sm) var(--pgmp-spacing-md);
    border-radius: var(--pgmp-radius-md);
    font-size: 0.75rem;
    max-width: 200px;
    z-index: var(--pgmp-z-tooltip);
    pointer-events: none;
    opacity: 0;
    transform: translateY(4px);
    transition: all var(--pgmp-transition-fast);
}

.pgmp-tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.pgmp-tooltip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--pgmp-text);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1200px) {
    .pgmp-columns-container {
        grid-template-columns: 1fr 1fr 1fr;
    }
    
    .pgmp-shared-zone {
        display: none;
    }
}

@media (max-width: 768px) {
    .pgmp-doc-comparison {
        padding: var(--pgmp-spacing-md);
    }
    
    .pgmp-semantic-cue {
        flex-direction: column;
    }
    
    .pgmp-cue-arrow {
        transform: rotate(90deg);
    }
    
    .pgmp-columns-container {
        grid-template-columns: 1fr;
    }
    
    .pgmp-toolbar {
        flex-direction: column;
    }
    
    .pgmp-inspector-panel {
        width: 100%;
        right: -100%;
    }
    
    .pgmp-title {
        font-size: 1.25rem;
    }
    
    .pgmp-core-zone,
    .pgmp-diagonal-zone {
        margin-top: var(--pgmp-spacing-md);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .pgmp-toolbar,
    .pgmp-inspector-panel,
    .pgmp-intro-animation {
        display: none !important;
    }
    
    .pgmp-doc-comparison {
        background: white;
        box-shadow: none;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes pgmp-fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pgmp-slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pgmp-scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.pgmp-animate-fadeIn {
    animation: pgmp-fadeIn var(--pgmp-transition-normal) ease-out;
}

.pgmp-animate-slideIn {
    animation: pgmp-slideIn var(--pgmp-transition-normal) ease-out;
}

.pgmp-animate-scaleIn {
    animation: pgmp-scaleIn var(--pgmp-transition-normal) ease-out;
}

/* Staggered animation for atoms */
.pgmp-atom:nth-child(1) { animation-delay: 0ms; }
.pgmp-atom:nth-child(2) { animation-delay: 50ms; }
.pgmp-atom:nth-child(3) { animation-delay: 100ms; }
.pgmp-atom:nth-child(4) { animation-delay: 150ms; }
.pgmp-atom:nth-child(5) { animation-delay: 200ms; }
.pgmp-atom:nth-child(6) { animation-delay: 250ms; }
.pgmp-atom:nth-child(7) { animation-delay: 300ms; }
.pgmp-atom:nth-child(8) { animation-delay: 350ms; }
.pgmp-atom:nth-child(9) { animation-delay: 400ms; }
.pgmp-atom:nth-child(10) { animation-delay: 450ms; }

/* ========================================
   Exam Mode Tooltip & Help Button
   ======================================== */
.pgmp-exam-help-btn {
    display: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #EF4444, #F97316);
    color: white;
    font-size: 11px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    transition: all var(--pgmp-transition-fast);
    position: relative;
}

.pgmp-exam-help-btn:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

/* Show help button only in exam mode */
.pgmp-atom.exam-highlight .pgmp-exam-help-btn {
    display: flex;
}

/* Exam Tooltip */
.pgmp-exam-tooltip {
    position: fixed;
    background: linear-gradient(135deg, #1F2937, #374151);
    color: white;
    padding: var(--pgmp-spacing-md);
    border-radius: var(--pgmp-radius-lg);
    font-size: 0.8125rem;
    line-height: 1.5;
    max-width: 380px;
    z-index: calc(var(--pgmp-z-tooltip) + 10);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--pgmp-transition-fast);
    pointer-events: none;
}

.pgmp-exam-tooltip.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.pgmp-exam-tooltip-header {
    display: flex;
    align-items: center;
    gap: var(--pgmp-spacing-sm);
    margin-bottom: var(--pgmp-spacing-sm);
    padding-bottom: var(--pgmp-spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.pgmp-exam-tooltip-icon {
    font-size: 1.25rem;
}

.pgmp-exam-tooltip-title {
    font-weight: 700;
    font-size: 0.875rem;
    color: #FBBF24;
}

.pgmp-exam-tooltip-content {
    color: #E5E7EB;
}

.pgmp-exam-tooltip-content strong {
    color: #FBBF24;
}

/* Tooltip arrow */
.pgmp-exam-tooltip::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 20px;
    border: 8px solid transparent;
    border-bottom-color: #1F2937;
}

/* Close button for tooltip */
.pgmp-exam-tooltip-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--pgmp-transition-fast);
}

.pgmp-exam-tooltip-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Exam mode legend indicator */
.pgmp-exam-mode-indicator {
    display: none;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    border: 1px solid #F59E0B;
    border-radius: var(--pgmp-radius-lg);
    padding: var(--pgmp-spacing-md);
    margin-bottom: var(--pgmp-spacing-lg);
    text-align: center;
}

.pgmp-exam-mode-indicator.visible {
    display: block;
    animation: pgmp-fadeIn var(--pgmp-transition-normal) ease-out;
}

.pgmp-exam-mode-indicator-title {
    font-weight: 700;
    color: #92400E;
    font-size: 1rem;
    margin-bottom: var(--pgmp-spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--pgmp-spacing-sm);
}

.pgmp-exam-mode-indicator-desc {
    font-size: 0.875rem;
    color: #78350F;
}

/* Enhanced exam highlight animation */
.pgmp-atom.exam-highlight {
    animation: pgmp-exam-pulse 2s ease-in-out infinite;
    border-color: #EF4444 !important;
    background: linear-gradient(135deg, #FEF2F2, white) !important;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

@keyframes pgmp-exam-pulse {
    0%, 100% { 
        box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
        border-color: #EF4444;
    }
    50% { 
        box-shadow: 0 0 0 6px rgba(239, 68, 68, 0.3);
        border-color: #DC2626;
    }
}