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

:root {
    /* X/Twitter inspired color palette */
    --primary-blue: #1DA1F2;
    --dark-blue: #1A91DA;
    --light-blue: #E1F5FE;
    --background-dark: #000000;
    --background-secondary: #16181C;
    --background-tertiary: #202327;
    --text-primary: #FFFFFF;
    --text-secondary: #8B98A5;
    --text-muted: #536471;
    --border-color: #2F3336;
    --accent-green: #00BA7C;
    --accent-red: #F91880;
    --accent-yellow: #FFD400;
    --accent-purple: #7856FF;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: var(--font-family);
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Dashboard Container */
.dashboard-container {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.dashboard-header {
    background: linear-gradient(135deg, var(--background-secondary) 0%, var(--background-tertiary) 100%);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 100%;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

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

.logo {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

.title-section h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-section p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    font-weight: 400;
}

.stats-overview {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.08);
}

.stat-item.highlight {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    border-color: var(--primary-blue);
}

.stat-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

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

.stat-item.highlight .stat-label {
    color: rgba(255, 255, 255, 0.9);
}

/* Main Dashboard Grid */
.dashboard-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    max-width: 100%;
}

/* Chart Cards */
.chart-card {
    background: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    overflow: hidden;
    position: relative;
}

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

.chart-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 400;
}

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

/* Grid Layout Assignments */
.heatmap-card {
    grid-column: span 8;
}

.scatter-card {
    grid-column: span 4;
}

.funnel-card {
    grid-column: span 4;
}

.sankey-card {
    grid-column: span 8;
}

.themeriver-card {
    grid-column: span 12;
}

.insights-panel {
    grid-column: span 12;
    background: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

/* Insights Panel */
.insights-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.insight-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--background-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.insight-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
}

.insight-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.insight-text h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* Footer */
.dashboard-footer {
    background: var(--background-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .dashboard-grid {
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    .heatmap-card {
        grid-column: span 12;
    }
    
    .scatter-card {
        grid-column: span 6;
    }
    
    .funnel-card {
        grid-column: span 6;
    }
    
    .sankey-card {
        grid-column: span 12;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .stats-overview {
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .dashboard-grid {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .chart-card {
        grid-column: span 12 !important;
        padding: var(--spacing-lg);
    }
    
    .chart-container {
        height: 300px;
    }
    
    .insights-content {
        grid-template-columns: 1fr;
    }
    
    .title-section h1 {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    .dashboard-grid {
        padding: var(--spacing-sm);
    }
    
    .chart-card {
        padding: var(--spacing-md);
    }
    
    .stats-overview {
        flex-direction: column;
        width: 100%;
    }
    
    .stat-item {
        width: 100%;
    }
}

/* Chart-specific styling */
.plotly-graph-div {
    background: transparent !important;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Loading animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}