:root {
    /* Color Palette - Institutional & Premium */
    --color-primary: #1a1d29;
    --color-secondary: #2a2d3a;
    --color-accent: #3b82f6;
    --color-background: #f8f9fa;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    
    /* Semantic Colors */
    --color-positive: #10b981;
    --color-negative: #ef4444;
    --color-warning: #f59e0b;
    --color-neutral: #6366f1;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    
    /* Layout */
    --sidebar-width: 240px;
    --topnav-height: 64px;
    --drawer-width: 480px;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-base: 200ms ease-in-out;
}

/* Dark Mode Variables */
body.dark-mode {
    --color-primary: #0f1117;
    --color-secondary: #1a1d29;
    --color-background: #0a0c10;
    --color-surface: #16181f;
    --color-border: #2a2d3a;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-background);
    line-height: 1.5;
    overflow-x: hidden;
    min-width: 320px;
    width: 100vw;
    max-width: 100%;
}

/* Top Navigation */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--topnav-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    box-sizing: border-box;
    overflow: hidden;
}

.nav-left {
    display: flex;
    align-items: center;
}

.dashboard-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

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

.search-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 280px;
}

.search-box i {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.date-range-selector {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-base);
}

.date-range-selector:hover {
    border-color: var(--color-accent);
}

.frequency-toggle {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.toggle-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.toggle-btn:not(:last-child) {
    border-right: 1px solid var(--color-border);
}

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

.toggle-btn:hover:not(.active) {
    background: var(--color-background);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

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

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--topnav-height);
    width: var(--sidebar-width);
    height: calc(100vh - var(--topnav-height));
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    z-index: 900;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.sidebar-logo i {
    font-size: 24px;
}

.sidebar-nav {
    padding: var(--spacing-lg) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 14px var(--spacing-lg);
    color: #64748b;
    text-decoration: none;
    transition: all var(--transition-base);
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
}

.nav-item i {
    width: 20px;
    font-size: 16px;
    color: #94a3b8;
    flex-shrink: 0;
}

.nav-item span {
    flex: 1;
    white-space: nowrap;
}

.nav-item:hover {
    background: var(--color-background);
    color: var(--color-text-primary);
    border-left-color: #e2e8f0;
}

.nav-item:hover i {
    color: var(--color-text-primary);
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.08);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    font-weight: 600;
}

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

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topnav-height);
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--topnav-height));
    max-width: calc(100vw - var(--sidebar-width));
    width: calc(100% - var(--sidebar-width));
    box-sizing: border-box;
    overflow-x: hidden;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

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

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    max-width: 100%;
    box-sizing: border-box;
}

.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    min-width: 0;
    min-height: 140px;
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.kpi-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-icon {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

.kpi-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.kpi-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.trend-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.trend-badge.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-positive);
}

.trend-badge.negative {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-negative);
}

.trend-badge.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.trend-badge.neutral {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-neutral);
}

.kpi-period {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Overview Grid */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(380px, 100%), 1fr));
    gap: var(--spacing-lg);
    max-width: 100%;
    box-sizing: border-box;
}

.overview-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    min-width: 0;
    max-width: 100%;
}

/* Card */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-width: 0;
}

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

.card-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.period-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

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

/* Mover Items */
.mover-item {
    display: grid;
    grid-template-columns: 1fr auto 80px;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.mover-info {
    display: flex;
    flex-direction: column;
}

.mover-name {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
}

.mover-oem {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mover-value {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.mover-value.positive {
    color: var(--color-positive);
}

.mover-value.negative {
    color: var(--color-negative);
}

.mover-value.warning {
    color: var(--color-warning);
}

.mini-chart {
    height: 32px;
}

/* Comparison Rows */
.comparison-row {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.comparison-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.comparison-values {
    display: flex;
    gap: var(--spacing-lg);
}

.comparison-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.comparison-type {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.comparison-value.positive {
    color: var(--color-positive);
}

/* Timeline Compact */
.timeline-compact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.timeline-item {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.timeline-date {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
}

.timeline-content {
    display: flex;
    flex-direction: column;
}

.timeline-title {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.timeline-oem {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.status-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-positive);
}

.status-badge.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.status-badge.pending {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-neutral);
}

/* Divergence Items */
.divergence-item {
    margin-bottom: var(--spacing-lg);
}

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

.divergence-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.divergence-program {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.divergence-value {
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.divergence-value.positive {
    color: var(--color-positive);
}

.divergence-value.negative {
    color: var(--color-negative);
}

.divergence-value.warning {
    color: var(--color-warning);
}

.progress-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width var(--transition-base);
}

.progress-fill.positive {
    background: var(--color-positive);
}

.progress-fill.negative {
    background: var(--color-negative);
}

.progress-fill.warning {
    background: var(--color-warning);
}

.divergence-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Change Items */
.change-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.change-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.change-icon.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-positive);
}

.change-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.change-icon.neutral {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-neutral);
}

.change-content {
    flex: 1;
}

.change-title {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.change-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.change-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Watchlist Items */
.watchlist-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--color-border);
}

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

.watchlist-item.risk {
    background: rgba(239, 68, 68, 0.03);
    border-color: rgba(239, 68, 68, 0.2);
}

.watchlist-item.positive {
    background: rgba(16, 185, 129, 0.03);
    border-color: rgba(16, 185, 129, 0.2);
}

.watchlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.watchlist-program {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.risk-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.risk-badge.high {
    background: var(--color-negative);
    color: white;
}

.risk-badge.medium {
    background: var(--color-warning);
    color: white;
}

.risk-badge.positive {
    background: var(--color-positive);
    color: white;
}

.watchlist-reason {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* Right Drawer */
.right-drawer {
    position: fixed;
    right: -480px;
    top: var(--topnav-height);
    width: 480px;
    height: calc(100vh - var(--topnav-height));
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease-in-out;
    z-index: 1100;
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
}

.right-drawer.open {
    right: 0;
    visibility: visible;
    opacity: 1;
}

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

.drawer-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.drawer-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-background);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.drawer-close:hover {
    background: var(--color-border);
    color: var(--color-text-primary);
}

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

/* Responsive */
@media (max-width: 1400px) {
    .overview-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

@media (max-width: 1024px) {
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        left: calc(-1 * var(--sidebar-width));
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-right {
        gap: var(--spacing-sm);
    }
    
    .search-box {
        display: none;
    }
}