/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Monochrome Palette */
    --black: #000000;
    --gray-950: #0a0a0a;
    --gray-900: #171717;
    --gray-800: #262626;
    --gray-700: #404040;
    --gray-600: #525252;
    --gray-500: #737373;
    --gray-400: #a3a3a3;
    --gray-300: #d4d4d4;
    --gray-200: #e5e5e5;
    --gray-100: #f5f5f5;
    --gray-50: #fafafa;
    --white: #ffffff;
    
    /* Semantic Colors */
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --border-color: var(--gray-300);
    --border-dark: var(--gray-800);
    
    /* Status Colors - Green/Yellow/Red */
    --color-match: #d4edda;
    --color-match-border: #28a745;
    --color-diff: #fff3cd;
    --color-diff-border: #ffc107;
    --color-missing: #f8d7da;
    --color-missing-border: #dc3545;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
    
    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===================================
   LAYOUT
   =================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: var(--black);
    color: var(--white);
    padding: var(--space-8) var(--space-6);
    border-bottom: 3px solid var(--black);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
}

.brand-icon {
    width: 40px;
    height: 40px;
    stroke-width: 2;
}

.brand-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.brand-subtitle {
    font-size: 1rem;
    opacity: 0.8;
    font-weight: 400;
}

.app-main {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-12) var(--space-6);
}

.app-footer {
    background: var(--gray-900);
    color: var(--white);
    text-align: center;
    padding: var(--space-6);
    font-size: 0.875rem;
    border-top: 1px solid var(--gray-800);
}

/* ===================================
   SECTION TITLES
   =================================== */
.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--black);
}

.section-title i {
    width: 28px;
    height: 28px;
    stroke-width: 2;
}

.section-title h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ===================================
   UPLOAD SECTION
   =================================== */
.upload-section {
    margin-bottom: var(--space-12);
}

.upload-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
}

.upload-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all var(--transition-base);
}

.upload-card:hover {
    border-color: var(--gray-700);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.upload-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.upload-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--black);
    color: var(--white);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.upload-card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.upload-area {
    margin-bottom: var(--space-4);
}

.file-input {
    display: none;
}

.file-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-10);
    background: var(--white);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.file-label:hover {
    border-color: var(--gray-700);
    background: var(--gray-50);
}

.file-label i {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
    color: var(--gray-600);
}

.file-label-text {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.file-label-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-info {
    display: none;
    padding: var(--space-4);
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.8;
}

.file-info.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

.file-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ===================================
   SELECTION SECTION
   =================================== */
.selection-section {
    margin-bottom: var(--space-12);
    animation: fadeIn var(--transition-slow);
}

.selection-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-6);
    align-items: center;
    margin-bottom: var(--space-8);
    padding: var(--space-8);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.select-group {
    flex: 1;
}

.select-label {
    display: block;
}

.select-label-text {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.select-input {
    width: 100%;
    padding: var(--space-4);
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.select-input:focus {
    outline: none;
    border-color: var(--black);
}

.select-input:hover {
    border-color: var(--gray-700);
}

.select-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.select-divider i {
    width: 24px;
    height: 24px;
    color: var(--gray-600);
}

.compare-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-5) var(--space-8);
    background: var(--black);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.compare-button:hover:not(:disabled) {
    background: var(--gray-800);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.compare-button:disabled {
    background: var(--gray-400);
    cursor: not-allowed;
    transform: none;
}

.compare-button i {
    width: 20px;
    height: 20px;
}

/* ===================================
   LOADING ANIMATION
   =================================== */
.loading-section {
    padding: var(--space-16) var(--space-6);
    text-align: center;
    animation: fadeIn var(--transition-base);
}

.loading-content {
    max-width: 600px;
    margin: 0 auto;
}

.loading-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.loading-icon i {
    width: 40px;
    height: 40px;
    color: var(--gray-900);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

.loading-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.loading-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
}

/* Gradient Progress Bar */
.progress-container {
    margin-top: var(--space-8);
}

.progress-bar {
    position: relative;
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: var(--space-6);
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, 
        #000000 0%, 
        #404040 25%, 
        #737373 50%, 
        #404040 75%, 
        #000000 100%);
    background-size: 200% 100%;
    border-radius: 100px;
    animation: progressFill 2s ease-in-out forwards, gradientFlow 3s linear infinite;
}

.progress-glow {
    position: absolute;
    top: -2px;
    left: 0;
    height: calc(100% + 4px);
    width: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.3) 50%, 
        transparent 100%);
    background-size: 200% 100%;
    animation: glowFlow 2s linear infinite;
    pointer-events: none;
}

@keyframes progressFill {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes gradientFlow {
    0% { background-position: 0% 0%; }
    100% { background-position: 200% 0%; }
}

@keyframes glowFlow {
    0% { background-position: -200% 0%; }
    100% { background-position: 200% 0%; }
}

.progress-stages {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-tertiary);
}

.progress-stages .stage {
    transition: color var(--transition-base);
}

.progress-stages .stage.active {
    color: var(--text-primary);
}

/* ===================================
   COMPARISON RESULTS
   =================================== */
.comparison-section {
    animation: fadeIn var(--transition-slow);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-10);
    padding: var(--space-6);
    background: var(--black);
    color: var(--white);
    border-radius: var(--radius-lg);
}

.results-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.results-title i {
    width: 28px;
    height: 28px;
}

.results-title h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.results-legend {
    display: flex;
    gap: var(--space-6);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    font-weight: 500;
}

.legend-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.legend-dot.match {
    background: var(--color-match-border);
}

.legend-dot.diff {
    background: var(--color-diff-border);
}

.legend-dot.missing {
    background: var(--color-missing-border);
}

/* ===================================
   COMPARISON BLOCKS
   =================================== */
.comparison-block {
    margin-bottom: var(--space-10);
}

.block-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: var(--gray-900);
    color: var(--white);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.block-header i {
    width: 20px;
    height: 20px;
}

.block-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

/* ===================================
   COMPARISON TABLE
   =================================== */
.comparison-table {
    display: grid;
    grid-template-columns: 250px 1fr 1fr;
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: hidden;
    background: var(--white);
}

.comparison-table > div {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    min-height: 48px;
    display: flex;
    align-items: center;
}

.comparison-table > div:nth-child(3n) {
    border-right: none;
}

.field-name {
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    background: var(--bg-tertiary);
}

.field-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    word-break: break-word;
}

.field-value.match {
    background: var(--color-match);
    color: var(--text-primary);
}

.field-value.diff {
    background: var(--color-diff);
    color: var(--text-primary);
    font-weight: 600;
}

.field-value.missing {
    background: var(--color-missing);
    color: var(--text-primary);
    font-style: italic;
}

/* ===================================
   TABLE SECTIONS
   =================================== */
.table-section {
    margin-bottom: var(--space-10);
}

.table-wrapper {
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow-x: auto;
    background: var(--white);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.data-table thead {
    background: var(--gray-900);
    color: var(--white);
}

.data-table th {
    padding: var(--space-4) var(--space-5);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--black);
    white-space: nowrap;
}

.data-table td {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

.data-table .row-num {
    background: var(--bg-tertiary);
    font-weight: 600;
    text-align: center;
    width: 60px;
}

.data-table .doc-label {
    font-weight: 600;
    width: 100px;
}

.data-table .match-cell {
    background: var(--color-match);
    color: var(--text-primary);
}

.data-table .diff-cell {
    background: var(--color-diff);
    color: var(--text-primary);
    font-weight: 600;
}

.data-table .missing-cell {
    background: var(--color-missing);
    color: var(--text-primary);
    font-style: italic;
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .comparison-table {
        grid-template-columns: 200px 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .brand-title {
        font-size: 1.75rem;
    }
    
    .app-main {
        padding: var(--space-8) var(--space-4);
    }
    
    .selection-container {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .select-divider {
        transform: rotate(90deg);
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    
    .results-legend {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
    
    .comparison-table {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .comparison-table > div {
        border-right: none;
    }
    
    .field-name {
        background: var(--gray-900);
        color: var(--white);
        font-weight: 700;
    }
    
    .data-table {
        font-size: 0.75rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--space-3) var(--space-4);
    }
}

@media (max-width: 480px) {
    .upload-container {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   DASHBOARD SECTION
   =================================== */
.dashboard-section {
    margin-bottom: var(--space-12);
    animation: fadeIn var(--transition-slow);
}

/* Critical Mismatches Section - TOP PRIORITY */
.critical-section {
    background: linear-gradient(135deg, #fff3cd 0%, #ffe8a1 100%);
    border: 3px solid var(--color-diff-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    margin-bottom: var(--space-10);
    box-shadow: 0 4px 20px rgba(255, 193, 7, 0.2);
}

.critical-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--color-diff-border);
}

.critical-header i {
    width: 32px;
    height: 32px;
    color: var(--color-diff-border);
    animation: pulse 2s ease-in-out infinite;
}

.critical-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    flex: 1;
}

.critical-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    background: var(--color-diff-border);
    color: var(--white);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.5rem;
    font-family: var(--font-mono);
    padding: 0 var(--space-4);
}

.critical-list {
    display: grid;
    gap: var(--space-4);
}

.critical-item {
    background: var(--white);
    border: 2px solid var(--color-diff-border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: var(--space-5);
    align-items: center;
}

.critical-item-icon {
    width: 40px;
    height: 40px;
    background: var(--color-diff-border);
    color: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.critical-item-icon i {
    width: 20px;
    height: 20px;
}

.critical-item-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.critical-item-label {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--gray-900);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.critical-item-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.critical-value {
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.critical-value-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
    font-weight: 600;
}

.critical-value-text {
    color: var(--gray-900);
    font-weight: 600;
}

/* Document Names Display */
.document-names-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.doc-name-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
}

.doc-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.doc-name {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--gray-900);
    font-weight: 600;
    word-break: break-all;
    line-height: 1.6;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.stat-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--gray-700);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon i {
    width: 24px;
    height: 24px;
}

.stat-icon.match {
    background: var(--color-match);
    color: var(--color-match-border);
}

.stat-icon.diff {
    background: var(--color-diff);
    color: var(--color-diff-border);
}

.stat-icon.missing {
    background: var(--color-missing);
    color: var(--color-missing-border);
}

.stat-icon.total {
    background: var(--gray-100);
    color: var(--gray-900);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===================================
   OPTIMIZED CHARTS LAYOUT
   =================================== */
.charts-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.chart-wrapper {
    min-height: 0;
}

.chart-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    height: 100%;
}

.chart-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
}

.chart-title i {
    width: 18px;
    height: 18px;
}

.chart-canvas-wrapper {
    position: relative;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-canvas-wrapper canvas {
    max-height: 100%;
    max-width: 100%;
}

/* Coverage Analysis */
.coverage-section {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-10);
}

.coverage-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--border-color);
}

.coverage-header i {
    width: 24px;
    height: 24px;
}

.coverage-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.coverage-grid {
    display: grid;
    gap: var(--space-4);
}

.coverage-item {
    padding: var(--space-5);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    transition: all var(--transition-base);
}

.coverage-item:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.coverage-item.increase {
    background: var(--color-match);
    border-color: var(--color-match-border);
}

.coverage-item.restriction {
    background: var(--color-missing);
    border-color: var(--color-missing-border);
}

.coverage-item-title {
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: var(--space-3);
    font-family: var(--font-mono);
    color: var(--gray-900);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.coverage-item-detail {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1.6;
}

.coverage-item-detail strong {
    font-weight: 700;
    color: var(--gray-900);
}

/* Endorsement Restrictions Specific Styling */
.endorsement-restriction {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    border-left: 4px solid var(--color-missing-border);
    padding: var(--space-5);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.endorsement-restriction .coverage-item-title {
    color: var(--color-missing-border);
}

.endorsement-increase {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-left: 4px solid var(--color-match-border);
    padding: var(--space-5);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.endorsement-increase .coverage-item-title {
    color: var(--color-match-border);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.action-btn i {
    width: 20px;
    height: 20px;
}

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

.action-btn.primary:hover {
    background: var(--gray-800);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.action-btn.secondary {
    background: var(--white);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.action-btn.secondary:hover {
    border-color: var(--gray-700);
    background: var(--gray-50);
}

/* ===================================
   INTERACTIVE EDITING
   =================================== */
.field-value.editable {
    cursor: pointer;
    position: relative;
}

.field-value.editable:hover {
    outline: 2px solid var(--gray-700);
    outline-offset: -2px;
}

.field-value.editing {
    padding: 0;
}

.field-value input {
    width: 100%;
    padding: var(--space-4) var(--space-5);
    border: 2px solid var(--black);
    background: var(--white);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    outline: none;
}

.edit-hint {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

.data-table td.editable {
    cursor: pointer;
    position: relative;
}

.data-table td.editable:hover {
    outline: 2px solid var(--gray-700);
    outline-offset: -2px;
}

/* ===================================
   LETTER MODAL
   =================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-6);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
}

.modal-close i {
    width: 24px;
    height: 24px;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
}

.modal-footer {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    border-top: 2px solid var(--border-color);
}

/* Letter Content */
.letter-content {
    font-family: var(--font-sans);
    line-height: 1.8;
    color: var(--text-primary);
}

.letter-header {
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 2px solid var(--black);
}

.letter-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.letter-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.letter-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

.letter-section {
    margin-bottom: var(--space-8);
}

.letter-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.letter-section p {
    margin-bottom: var(--space-4);
}

.letter-list {
    list-style: none;
    padding: 0;
}

.letter-list li {
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-2);
    background: var(--gray-50);
    border-left: 3px solid var(--gray-700);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.letter-list li.difference {
    background: var(--color-diff);
    border-color: var(--color-diff-border);
}

.letter-list li.missing {
    background: var(--color-missing);
    border-color: var(--color-missing-border);
}

.letter-list li.coverage-increase {
    background: var(--color-match);
    border-color: var(--color-match-border);
}

.letter-list li.coverage-restriction {
    background: var(--color-missing);
    border-color: var(--color-missing-border);
}

.letter-field-name {
    font-weight: 600;
    display: block;
    margin-bottom: var(--space-1);
}

.letter-field-values {
    display: flex;
    gap: var(--space-4);
    font-size: 0.8125rem;
}

.letter-signature {
    margin-top: var(--space-10);
    padding-top: var(--space-6);
    border-top: 2px solid var(--border-color);
}

/* ===================================
   SIDE-BY-SIDE COMPARISON LAYOUT
   =================================== */
.side-by-side-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border-color);
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: hidden;
}

.document-column {
    background: var(--white);
}

.column-header {
    background: var(--gray-800);
    color: var(--white);
    padding: var(--space-4) var(--space-5);
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
    border-bottom: 2px solid var(--black);
}

.field-list {
    display: flex;
    flex-direction: column;
}

.field-item {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    min-height: 60px;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

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

.field-item-name {
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
}

.field-item-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    word-break: break-word;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
}

.field-item-value.match {
    background: var(--color-match);
    color: var(--text-primary);
}

.field-item-value.diff {
    background: var(--color-diff);
    color: var(--text-primary);
    font-weight: 600;
}

.field-item-value.missing {
    background: var(--color-missing);
    color: var(--text-primary);
    font-style: italic;
}

.field-item-value.editable {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.field-item-value.editable:hover {
    outline: 2px solid var(--gray-700);
    outline-offset: 2px;
}

/* ===================================
   RESPONSIVE UPDATES
   =================================== */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-btn {
        width: 100%;
        justify-content: center;
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .side-by-side-container {
        grid-template-columns: 1fr;
    }
    
    .document-names-section {
        grid-template-columns: 1fr;
    }
    
    .critical-item {
        grid-template-columns: 1fr;
    }
    
    .critical-item-values {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}