/* ===== VARIABLES & RESET ===== */
:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --danger-color: #EF4444;
    --warning-color: #FBBF24;
    --success-color: #10B981;
    --info-color: #06B6D4;
    --secondary-color: #F97316;
    
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --text-lighter: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --border-color: #E5E7EB;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --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);
    
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-dark);
}

body {
    line-height: 1.6;
}

/* ===== NAVBAR ===== */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 150px;
}

.logo-icon {
    font-size: 1.5rem;
}

.navbar-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.navbar-search {
    flex: 1;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-primary);
}

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

.notification-icon {
    font-size: 1.25rem;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.notification-icon:hover {
    transform: scale(1.1);
}

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

.avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== MAIN CONTAINER ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.dashboard-section {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.dashboard-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

/* ===== KPI GRID ===== */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.kpi-card {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

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

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
}

.menu-icon {
    cursor: pointer;
    color: var(--text-lighter);
    font-size: 1.25rem;
    transition: color 0.2s ease;
}

.menu-icon:hover {
    color: var(--text-dark);
}

.card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.card-change {
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

/* ===== DASHBOARD GRID ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* ===== CHARTS ===== */
.chart-section, .payment-section {
    display: flex;
    flex-direction: column;
}

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

.section-header h2 {
    margin-bottom: 0;
}

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

.btn-update {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-update:hover {
    background-color: var(--primary-dark);
    transform: scale(1.05);
}

.btn-update:active {
    transform: scale(0.98);
}

.trend-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--spacing-xl);
}

.trend-value {
    display: flex;
    flex-direction: column;
}

.trend-value .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
}

.trend-value .change {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--success-color);
}

.chart-legend {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.875rem;
}

.legend-dot {
    display: inline-block;
    width: 0.625rem;
    height: 0.625rem;
    border-radius: 50%;
    margin-right: var(--spacing-sm);
}

.chart {
    width: 100%;
    height: 300px;
    max-height: 100%;
}

.pie-chart {
    width: 100%;
    height: 250px;
}

/* ===== PAYMENT METHODS ===== */
.payment-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.payment-legend {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.9rem;
}

.legend-color {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 2px;
    flex-shrink: 0;
}

/* ===== TABLES ===== */
.table-wrapper {
    overflow-x: auto;
    margin-top: var(--spacing-lg);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table thead {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.data-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

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

.product-icon {
    margin-right: var(--spacing-sm);
}

/* ===== INVENTORY TABLE ===== */
.inventory-table input[type="checkbox"] {
    cursor: pointer;
    width: 1rem;
    height: 1rem;
}

.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.status-badge.critical {
    background-color: #FEE2E2;
    color: #DC2626;
}

.status-badge.low {
    background-color: #FEF3C7;
    color: #D97706;
}

.status-badge.match {
    background-color: #DBEAFE;
    color: #0284C7;
}

/* ===== FILTER CONTROLS ===== */
.filter-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-dark);
    cursor: pointer;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.hidden {
    display: none;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .navbar-container {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .navbar-search {
        max-width: none;
        order: 3;
        flex-basis: 100%;
    }

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

    .kpi-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }

    .dashboard-section {
        padding: var(--spacing-lg);
    }

    .section-header {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .section-controls {
        width: 100%;
    }

    .card-value {
        font-size: 1.5rem;
    }

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

    .chart-legend {
        flex-wrap: wrap;
    }

    .data-table {
        font-size: 0.85rem;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    .navbar-brand h1 {
        font-size: 1.25rem;
    }

    .navbar-profile {
        gap: var(--spacing-md);
    }

    .profile-user span {
        display: none;
    }

    .avatar {
        width: 2rem;
        height: 2rem;
        font-size: 0.8rem;
    }

    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .dashboard-section {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }

    .dashboard-section h2 {
        font-size: 1.1rem;
        margin-bottom: var(--spacing-md);
    }

    .kpi-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .kpi-card {
        padding: var(--spacing-md);
    }

    .card-value {
        font-size: 1.5rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-controls,
    .filter-controls {
        width: 100%;
        flex-direction: column;
    }

    .btn-update,
    .filter-select {
        width: 100%;
    }

    .chart {
        height: 250px;
    }

    .pie-chart {
        height: 200px;
    }

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

    .table-wrapper {
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .status-badge {
        font-size: 0.75rem;
        padding: 2px 6px;
    }

    .product-icon {
        display: none;
    }
}

@media (max-width: 480px) {
    .navbar-container {
        padding: var(--spacing-md);
    }

    .navbar-brand {
        min-width: auto;
    }

    .logo-icon {
        font-size: 1.25rem;
    }

    .navbar-brand h1 {
        font-size: 1rem;
    }

    .navbar-search {
        order: 3;
        flex-basis: 100%;
    }

    .search-input {
        font-size: 0.85rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .navbar-profile {
        order: 2;
    }

    .container {
        padding: var(--spacing-md);
    }

    .dashboard-section {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .dashboard-section h2 {
        font-size: 1rem;
    }

    .card-value {
        font-size: 1.25rem;
    }

    .card-header h3 {
        font-size: 0.85rem;
    }

    .chart {
        height: 200px;
    }

    .pie-chart {
        height: 180px;
    }

    .payment-legend {
        flex-direction: column;
    }

    .chart-legend {
        font-size: 0.75rem;
        gap: var(--spacing-md);
    }

    .data-table th,
    .data-table td {
        padding: 4px 6px;
        font-size: 0.75rem;
    }

    .btn-update,
    .filter-select {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
}