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

/* ===== CSS VARIABLES - ADVERTISING ANALYTICS THEME ===== */
:root {
    /* Primary Colors - Professional Blues for Trust & Analytics */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-bg: #eff6ff;
    
    /* Secondary Colors - Data Visualization Palette */
    --secondary-color: #0891b2;
    --secondary-light: #06b6d4;
    --secondary-dark: #0e7490;
    
    /* Success Colors - Positive Performance */
    --success-color: #059669;
    --success-light: #10b981;
    --success-dark: #047857;
    --success-bg: #ecfdf5;
    
    /* Warning Colors - Attention Needed */
    --warning-color: #d97706;
    --warning-light: #f59e0b;
    --warning-dark: #b45309;
    --warning-bg: #fffbeb;
    
    /* Error Colors - Critical Issues */
    --error-color: #dc2626;
    --error-light: #ef4444;
    --error-dark: #b91c1c;
    --error-bg: #fef2f2;
    
    /* Neutral Colors - Clean & Professional */
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    /* Border & Shadow */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 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;
    --space-20: 5rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== BASE STYLES ===== */
body {
    font-family: var(--font-family);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== DASHBOARD CONTAINER ===== */
.dashboard-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== HEADER STYLES ===== */
.dashboard-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-6) var(--space-8);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
}

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

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.logo-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.date-range {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.date-range i {
    width: 16px;
    height: 16px;
}

.refresh-btn {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.refresh-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.refresh-btn i {
    width: 18px;
    height: 18px;
}

/* ===== METRICS GRID ===== */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    padding: var(--space-8);
    max-width: 1400px;
    margin: 0 auto;
}

.metric-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.metric-card.secondary::before {
    background: linear-gradient(90deg, var(--secondary-color), var(--secondary-light));
}

.metric-card.success::before {
    background: linear-gradient(90deg, var(--success-color), var(--success-light));
}

.metric-card.warning::before {
    background: linear-gradient(90deg, var(--warning-color), var(--warning-light));
}

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

.metric-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    color: var(--primary-color);
    flex-shrink: 0;
}

.metric-card.secondary .metric-icon {
    background: #ecfeff;
    color: var(--secondary-color);
}

.metric-card.success .metric-icon {
    background: var(--success-bg);
    color: var(--success-color);
}

.metric-card.warning .metric-icon {
    background: var(--warning-bg);
    color: var(--warning-color);
}

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

.metric-content h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.metric-unit {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.metric-change {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
}

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

.metric-change.negative {
    background: var(--error-bg);
    color: var(--error-color);
}

.metric-change.neutral {
    background: var(--warning-bg);
    color: var(--warning-color);
}

.metric-change i {
    width: 12px;
    height: 12px;
}

/* ===== CONTENT GRID ===== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-6);
    padding: 0 var(--space-8) var(--space-8);
    max-width: 1400px;
    margin: 0 auto;
}

/* ===== CHART CONTAINERS ===== */
.chart-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.chart-container:hover {
    box-shadow: var(--shadow-lg);
}

.chart-container.large {
    grid-column: span 8;
}

.chart-container.medium {
    grid-column: span 4;
}

.chart-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chart-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.chart-header h2 i {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
}

.chart-controls select {
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chart-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.chart-content {
    padding: var(--space-6);
    height: 400px;
    position: relative;
}

.allocation-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-1);
}

.toggle-btn {
    padding: var(--space-2) var(--space-4);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.trend-legend {
    display: flex;
    gap: var(--space-4);
}

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

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-sm);
}

/* ===== INSIGHTS PANEL ===== */
.insights-panel {
    grid-column: span 6;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.panel-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-light);
    background: linear-gradient(135deg, var(--primary-bg), var(--bg-primary));
}

.panel-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.panel-header h2 i {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
}

.insights-content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    max-height: 500px;
    overflow-y: auto;
}

.insight-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    transition: all var(--transition-fast);
}

.insight-item.critical {
    background: var(--error-bg);
    border-left-color: var(--error-color);
}

.insight-item.positive {
    background: var(--success-bg);
    border-left-color: var(--success-color);
}

.insight-item.warning {
    background: var(--warning-bg);
    border-left-color: var(--warning-color);
}

.insight-item.neutral {
    background: var(--bg-tertiary);
    border-left-color: var(--neutral-400);
}

.insight-item:hover {
    transform: translateX(4px);
}

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

.insight-item.critical .insight-icon {
    background: var(--error-color);
    color: var(--text-inverse);
}

.insight-item.positive .insight-icon {
    background: var(--success-color);
    color: var(--text-inverse);
}

.insight-item.warning .insight-icon {
    background: var(--warning-color);
    color: var(--text-inverse);
}

.insight-item.neutral .insight-icon {
    background: var(--neutral-500);
    color: var(--text-inverse);
}

.insight-icon i {
    width: 18px;
    height: 18px;
}

.insight-text h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.insight-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== RECOMMENDATIONS PANEL ===== */
.recommendations-panel {
    grid-column: span 6;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.recommendations-content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    max-height: 500px;
    overflow-y: auto;
}

.recommendation-item {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    position: relative;
    transition: all var(--transition-normal);
}

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

.recommendation-item.priority-high {
    background: linear-gradient(135deg, var(--error-bg), var(--bg-primary));
    border-color: var(--error-color);
}

.recommendation-item.priority-medium {
    background: linear-gradient(135deg, var(--warning-bg), var(--bg-primary));
    border-color: var(--warning-color);
}

.recommendation-item.priority-low {
    background: linear-gradient(135deg, var(--success-bg), var(--bg-primary));
    border-color: var(--success-color);
}

.priority-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.recommendation-item.priority-high .priority-badge {
    background: var(--error-color);
    color: var(--text-inverse);
}

.recommendation-item.priority-medium .priority-badge {
    background: var(--warning-color);
    color: var(--text-inverse);
}

.recommendation-item.priority-low .priority-badge {
    background: var(--success-color);
    color: var(--text-inverse);
}

.recommendation-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    padding-right: var(--space-16);
}

.recommendation-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.recommendation-impact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-light);
}

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

.impact-value {
    font-size: 0.875rem;
    font-weight: 700;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
}

.impact-value.positive {
    background: var(--success-bg);
    color: var(--success-color);
}

.impact-value.neutral {
    background: var(--neutral-100);
    color: var(--neutral-600);
}

/* ===== FOOTER ===== */
.dashboard-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-6) var(--space-8);
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-info p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.export-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.export-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.export-btn i {
    width: 16px;
    height: 16px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: repeat(8, 1fr);
    }
    
    .chart-container.large {
        grid-column: span 8;
    }
    
    .chart-container.medium {
        grid-column: span 4;
    }
    
    .insights-panel,
    .recommendations-panel {
        grid-column: span 4;
    }
}

@media (max-width: 768px) {
    .dashboard-header {
        padding: var(--space-4);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--space-4);
        align-items: flex-start;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
        padding: var(--space-4);
        gap: var(--space-4);
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        padding: 0 var(--space-4) var(--space-4);
        gap: var(--space-4);
    }
    
    .chart-container.large,
    .chart-container.medium,
    .insights-panel,
    .recommendations-panel {
        grid-column: span 1;
    }
    
    .chart-content {
        height: 300px;
    }
    
    .chart-header {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-4);
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .metric-card {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
    }
    
    .metric-icon {
        align-self: center;
    }
    
    .chart-header {
        padding: var(--space-4);
    }
    
    .chart-content {
        padding: var(--space-4);
        height: 250px;
    }
    
    .insights-content,
    .recommendations-content {
        padding: var(--space-4);
    }
}

/* ===== PRINT MEDIA QUERIES ===== */
@media print {
    @page {
        margin: 1in;
        @top-center {
            content: "Flipkart Advertising Analytics Dashboard - Campaign Performance & ROI Analysis";
        }
        @bottom-center {
            content: "Created by Helium AI";
        }
    }
    
    body {
        background: white;
        color: black;
        print-color-adjust: exact;
    }
    
    .dashboard-header,
    .dashboard-footer {
        display: none;
    }
    
    .chart-container,
    .insights-panel,
    .recommendations-panel {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
}