/* CVE.ICU Design System - Matching cnascorecard.org */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root Variables - Design System Colors */
:root {
    /* Base Colors */
    --color-bg-primary: #f8f9fa;
    --color-bg-secondary: #e9ecef;
    --color-bg-content: #ffffff;
    --color-bg-hover: #f8f9fa;
    --color-text: #212529;
    --color-text-primary: #212529;
    --color-text-secondary: #6c757d;
    --color-text-muted: #adb5bd;
    --color-primary: #0d6efd;
    --color-primary-light: rgba(13, 110, 253, 0.1);
    --color-accent: #0d6efd;
    --color-border: #dee2e6;
    --color-border-light: #f1f3f4;
    --color-success: #198754;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    
    /* Light Blue to Light Grey Visualization Palette */
    --viz-color-1: #e3f2fd;  /* Very light blue */
    --viz-color-2: #bbdefb;  /* Light blue */
    --viz-color-3: #90caf9;  /* Medium light blue */
    --viz-color-4: #64b5f6;  /* Medium blue */
    --viz-color-5: #42a5f5;  /* Blue */
    --viz-color-6: #2196f3;  /* Primary blue */
    --viz-color-7: #1e88e5;  /* Darker blue */
    --viz-color-8: #1976d2;  /* Dark blue */
    --viz-color-9: #9e9e9e;  /* Medium grey */
    --viz-color-10: #757575; /* Dark grey */
    
    /* Chart Color Palette - Light Blue to Grey Gradient */
    --chart-primary: #2196f3;
    --chart-secondary: #64b5f6;
    --chart-tertiary: #90caf9;
    --chart-quaternary: #bbdefb;
    --chart-accent-1: #81c784;
    --chart-accent-2: #ffb74d;
    --chart-accent-3: #f06292;
    --chart-grey-light: #e0e0e0;
    --chart-grey-medium: #9e9e9e;
    --chart-grey-dark: #616161;
    
    /* Semantic Colors */
    --color-info: #17a2b8;
    --color-light: #f8f9fa;
    --color-dark: #343a40;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Base Typography */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

/* Links */
a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

a:hover {
    color: #0a58ca;
    text-decoration: underline;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header and Navigation */
.header {
    background-color: var(--color-bg-content);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
    color: var(--color-accent);
}

.logo img {
    width: 2rem;
    height: 2rem;
    object-fit: contain;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.15s ease-in-out;
    border: 2px solid transparent;
}

.nav-menu a:hover {
    color: var(--color-accent);
    background-color: rgba(13, 110, 253, 0.1);
    border-color: var(--color-accent);
    text-decoration: none;
}

.nav-menu a.active {
    color: var(--color-accent);
    background-color: rgba(13, 110, 253, 0.1);
    border-color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 1.5rem;
    height: 2px;
    background-color: var(--color-text-primary);
    margin: 2px 0;
    transition: 0.3s;
}

/* Main Content */
main {
    min-height: calc(100vh - 8rem);
    padding: var(--spacing-xl) 0;
}

/* Professional Page Header Styling */
.page-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2196f3, #64b5f6, #90caf9);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.page-header h1 {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.page-header small {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.5;
    font-weight: var(--font-weight-medium);
}

/* Page header buttons - ensure proper contrast against gradient background */
.page-header button {
    background-color: #ffffff !important;
    border: 2px solid var(--color-border) !important;
    color: var(--color-text-primary) !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1) !important;
}

.page-header button:hover {
    background-color: #f8f9fa !important;
    border-color: var(--color-primary) !important;
    color: var(--color-primary) !important;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15) !important;
}

.page-header button:active,
.page-header button.active {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    color: #ffffff !important;
}

/* Responsive page header */
@media (max-width: 768px) {
    .page-header {
        padding: var(--spacing-lg) var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header small {
        font-size: 0.9rem;
    }
}

/* Cards */
.card {
    background-color: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.card-body {
    padding: 0;
}

/* Grid Layouts */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Professional Stats Cards Design System */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Responsive grid for smaller screens */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.stat-card {
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.05),
        0 1px 2px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--chart-primary) 0%, 
        var(--chart-secondary) 50%, 
        var(--chart-tertiary) 100%);
    opacity: 0.8;
}

.stat-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.1),
        0 6px 10px rgba(0, 0, 0, 0.05);
    border-color: rgba(59, 130, 246, 0.3);
}

.stat-card:hover::before {
    height: 6px;
    opacity: 1;
}

.stat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.1) 0%, 
        rgba(147, 197, 253, 0.1) 100%);
    border-radius: 16px;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--chart-primary);
    transition: all 0.3s ease;
}

.stat-card:hover .stat-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.15) 0%, 
        rgba(147, 197, 253, 0.15) 100%);
}

.stat-content {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
    letter-spacing: -0.025em;
}

.stat-sublabel {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    font-weight: 500;
}

/* Enhanced stats cards for specific use cases */
.stat-card.highlight {
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.02) 0%, 
        rgba(147, 197, 253, 0.02) 100%);
    border-color: rgba(59, 130, 246, 0.2);
}

.stat-card.highlight::before {
    background: linear-gradient(90deg, 
        var(--chart-primary) 0%, 
        var(--color-success) 100%);
}

/* Growth/trend indicators */
.stat-trend {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

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

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

.stat-trend.neutral {
    color: var(--color-text-secondary);
    background: rgba(156, 163, 175, 0.1);
}

/* Additional responsive adjustments for card content */
@media (max-width: 768px) {
    .stat-card {
        padding: 1.5rem 1.25rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .stat-card {
        padding: 1.25rem 1rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
}

/* Legacy support for existing stat-cards class */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Legacy stat-value, stat-label, stat-detail classes */
.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.stat-detail {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    line-height: 1.4;
    font-weight: 500;
}

/* Year Grid Selector - Compact Version */
.year-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.year-item {
    display: block;
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
}

.year-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.year-item .year-label {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: center;
    background-color: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    font-size: 0.8rem;
    transition: all 0.2s ease;
    user-select: none;
    min-height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.year-item:hover .year-label {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.year-item input[type="checkbox"]:checked + .year-label {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    font-weight: var(--font-weight-semibold);
}

.year-item input[type="checkbox"]:focus + .year-label {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Compact Quick Selection Buttons */
.quick-select-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    justify-content: center;
    align-items: center;
}

.quick-select-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-bg-content);
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    user-select: none;
    height: 28px;
}

.quick-select-btn:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(13, 110, 253, 0.15);
}

.quick-select-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(13, 110, 253, 0.2);
}

.quick-select-btn.primary {
    color: var(--color-text-secondary);
}

.quick-select-btn.secondary:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    background-color: var(--color-bg-hover);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

tbody tr:nth-child(even) {
    background-color: rgba(248, 249, 250, 0.5);
}

tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

/* Homepage Chart Structure - Bulletproof Width Consistency */
.homepage-chart-section,
.homepage-preview-section {
    width: 100%;
    margin: 0;
    padding: 0;
}

.homepage-chart-card {
    background-color: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: var(--spacing-lg);
    width: 100%;
    max-width: none;
}

.homepage-chart-header {
    padding: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.homepage-chart-title {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
    margin-bottom: var(--spacing-xs);
}

.homepage-chart-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    display: block;
}

.homepage-chart-body {
    padding: var(--spacing-lg);
    width: 100%;
}

.homepage-chart-container {
    position: relative;
    width: 100%;
    height: 400px;
    margin: 0;
    padding: 0;
    background: none;
    border: none;
    box-shadow: none;
}

.homepage-preview-container {
    height: 400px;
}

.homepage-chart-footer {
    margin-top: var(--spacing-lg);
    text-align: center;
}

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

/* Chart Title Styling */
.chart-title {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

/* Visualization Components */
.viz-card {
    background-color: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    transition: all 0.2s ease;
}

.viz-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--box-shadow-lg);
    border-color: var(--color-primary-light);
}

.viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.viz-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
}

.viz-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin: var(--spacing-xs) 0 0 0;
}

/* Chart Legend Styling */
.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* Data Table Styling for Charts */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
}

.data-table th,
.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table th {
    background-color: var(--color-bg-secondary);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    position: sticky;
    top: 0;
}

.data-table tr:hover {
    background-color: var(--color-bg-hover);
}

/* Metric Cards for Visualizations */
.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.metric-card {
    background: linear-gradient(135deg, var(--viz-color-1), var(--viz-color-2));
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--chart-primary), var(--chart-secondary));
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.15);
}

.metric-value {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--chart-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}

.metric-change {
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.metric-change.positive {
    color: var(--color-success);
}

.metric-change.negative {
    color: var(--color-danger);
}

.metric-change.neutral {
    color: var(--color-text-muted);
}

/* Loading States */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl);
    color: var(--color-text-secondary);
}

.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-secondary); }
.text-primary { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* Footer */
.footer {
    background-color: var(--color-bg-content);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.footer p {
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: var(--color-text-secondary);
}

/* Smart Insights Panel */
.insight-card {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    height: 100%;
}

.insight-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary);
}

.insight-icon {
    font-size: 2rem;
    margin-right: var(--spacing-md);
    opacity: 0.8;
}

.insight-content {
    flex: 1;
}

.insight-title {
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin: 0 0 var(--spacing-xs) 0;
}

.insight-text {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.4;
}

/* Export Buttons */
.export-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
}

.export-buttons .btn {
    font-size: 0.8rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-content);
    color: var(--color-text);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.export-buttons .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.export-buttons .btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.export-buttons .btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0b5ed7;
}

.export-buttons .btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
    color: white;
}

.export-buttons .btn-secondary:hover {
    background-color: #5c636a;
    border-color: #5c636a;
}

.permalink-result {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.permalink-result input {
    font-size: 0.8rem;
    font-family: monospace;
    width: 100%;
    padding: var(--spacing-xs);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-bg-content);
}

/* Enhanced Stat Cards */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-trend {
    font-size: 0.7rem;
    font-weight: var(--font-weight-medium);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-trend.positive {
    color: #198754;
}

.stat-trend.negative {
    color: #dc3545;
}

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

.stat-percentage {
    font-size: 0.7rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* Responsive adjustments for visualizations */
@media (max-width: 768px) {
    .insight-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
    }
    
    .insight-icon {
        margin-right: 0;
        margin-bottom: var(--spacing-xs);
        font-size: 1.5rem;
    }
    
    .export-buttons {
        justify-content: center;
    }
    
    .export-buttons .btn {
        flex: 1;
        min-width: 120px;
    }
    
    .metric-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .metric-card {
        padding: var(--spacing-md);
    }
    
    .metric-value {
        font-size: 1.5rem;
    }
    
    .chart-container {
        height: 300px;
        padding: var(--spacing-sm);
    }
    
    .viz-card {
        padding: var(--spacing-md);
    }
    
    .chart-legend {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .data-table {
        font-size: 0.8rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

.footer a:hover {
    color: var(--color-accent);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg-content);
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--box-shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .chart-container {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    th, td {
        padding: var(--spacing-sm);
    }
    
    .chart-container {
        height: 250px;
        padding: var(--spacing-xs);
    }
    
    .metric-grid {
        grid-template-columns: 1fr;
    }
    
    .metric-value {
        font-size: 1.25rem;
    }
    
    .viz-title {
        font-size: 1.1rem;
    }
    
    .chart-legend {
        gap: var(--spacing-xs);
    }
    
    .legend-item {
        font-size: 0.75rem;
    }
}