/* ============================================
   Design System & CSS Variables
   ============================================ */
:root {
    /* Color Palette */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #151b2e;
    --color-bg-card: rgba(21, 27, 46, 0.8);
    --color-bg-card-hover: rgba(30, 37, 60, 0.9);

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0aec0;
    --color-text-muted: #64748b;

    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #06b6d4;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-success: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-info: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    --gradient-bg: linear-gradient(135deg, #020617 0%, #0f172a 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2rem;
    --font-size-4xl: 2.5rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;
}

/* ============================================
   Global Styles & Reset
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeInDown 0.6s ease-out;
}

.header-content h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.header-content p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.filters-row {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
}

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

.location-selector label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.location-select {
    background: var(--color-bg-card);
    /* Changed from --color-card-bg to --color-bg-card */
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    /* Changed from --color-border to a specific value */
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 200px;
}

.location-select:hover {
    border-color: rgba(99, 102, 241, 0.3);
    /* Changed from --color-accent to a specific value */
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.1);
}

.location-select:focus {
    outline: none;
    border-color: rgba(99, 102, 241, 0.3);
    /* Changed from --color-accent to a specific value */
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.2);
}

.time-selector {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--color-bg-card);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.time-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-text-primary);
}

.time-btn.active {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   KPI Grid
   ============================================ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.kpi-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.kpi-card:hover {
    transform: translateY(-4px);
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.3);
}

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

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

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

.kpi-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    background: rgba(99, 102, 241, 0.1);
    transition: all var(--transition-base);
}

.kpi-card:hover .kpi-icon {
    transform: scale(1.1) rotate(5deg);
}

.kpi-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
}

.kpi-footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

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

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

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

/* ============================================
   Charts Section
   ============================================ */
.charts-section {
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-md);
}

.chart-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.chart-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-lg);
}

.chart-header {
    margin-bottom: var(--spacing-md);
}

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

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

.chart-container {
    position: relative;
    height: 300px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .header-content h1 {
        font-size: var(--font-size-2xl);
    }

    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .time-selector {
        width: 100%;
        justify-content: space-between;
    }

    .time-btn {
        flex: 1;
        text-align: center;
    }

    .chart-container {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .kpi-value {
        font-size: var(--font-size-2xl);
    }

    .header-content h1 {
        font-size: var(--font-size-xl);
    }

    .time-selector {
        flex-wrap: wrap;
    }

    .time-btn {
        min-width: calc(50% - var(--spacing-xs));
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

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

.mb-md {
    margin-bottom: var(--spacing-md);
}

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

.hidden {
    display: none;
}