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

:root {
    /* Blue/Indigo Professional Theme */
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-surface: #334155;
    --color-surface-hover: #475569;

    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;

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

    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

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

    /* Sidebar */
    --sidebar-width: 250px;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);

    /* Transitions */
    --transition: 200ms ease-in-out;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    display: flex;
    min-height: 100vh;
    line-height: 1.6;
}

/* ===================================
   SIDEBAR
   =================================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid rgba(59, 130, 246, 0.1);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-primary);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    font-weight: 500;
}

.nav-item svg {
    width: 20px;
    height: 20px;
}

.nav-item:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
}

/* ===================================
   MAIN CONTENT
   =================================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-lg);
    overflow-x: hidden;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.header-left {
    flex: 1;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
}

.time-filter {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--color-bg-secondary);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
}

.filter-btn:hover {
    color: var(--color-text);
}

.filter-btn.active {
    background: var(--color-primary);
    color: white;
}

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

.metric-card {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.1);
    transition: all var(--transition);
}

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

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

.metric-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-icon {
    width: 40px;
    height: 40px;
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.metric-icon.revenue {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.metric-icon.orders {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
}

.metric-icon.customers {
    background: rgba(139, 92, 246, 0.1);
    color: var(--color-secondary);
}

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

.metric-value {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.metric-change {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.metric-change svg {
    width: 16px;
    height: 16px;
}

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

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

/* ===================================
   CHARTS
   =================================== */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-card {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.1);
}

.chart-card.large {
    grid-column: span 2;
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

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

/* ===================================
   TABLE
   =================================== */
.table-container {
    overflow-x: auto;
}

.products-table {
    width: 100%;
    border-collapse: collapse;
}

.products-table th {
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-surface);
}

.products-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(59, 130, 246, 0.05);
}

.products-table tbody tr {
    transition: background var(--transition);
}

.products-table tbody tr:hover {
    background: var(--color-surface);
}

.product-name {
    font-weight: 600;
    color: var(--color-text);
}

.product-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.product-sales,
.product-revenue {
    font-weight: 600;
}

/* ===================================
   RECENT ORDERS
   =================================== */
.recent-orders {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.1);
    margin-bottom: var(--spacing-lg);
}

.orders-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.order-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.order-item:hover {
    background: var(--color-surface-hover);
    transform: translateX(4px);
}

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

.order-id {
    font-weight: 600;
    color: var(--color-primary);
    font-family: 'Courier New', monospace;
}

.order-customer {
    color: var(--color-text-secondary);
}

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

.order-amount {
    font-weight: 700;
    font-size: 1.125rem;
}

.order-status {
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

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

.order-status.processing {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1400px) {
    .chart-card.large {
        grid-column: span 1;
    }
}

@media (max-width: 1024px) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        margin-left: 200px;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .charts-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        transform: translateX(-100%);
        z-index: 1000;
        transition: transform var(--transition);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }

    .header {
        flex-direction: column;
    }

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

    .time-filter {
        width: 100%;
        flex-wrap: wrap;
    }

    .filter-btn {
        flex: 1;
    }

    .order-item {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }

    .order-right {
        width: 100%;
        justify-content: space-between;
    }
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.metric-card,
.chart-card,
.recent-orders {
    animation: fadeInUp 0.5s ease-out backwards;
}

.metric-card:nth-child(1) {
    animation-delay: 0.05s;
}

.metric-card:nth-child(2) {
    animation-delay: 0.1s;
}

.metric-card:nth-child(3) {
    animation-delay: 0.15s;
}

.metric-card:nth-child(4) {
    animation-delay: 0.2s;
}