/* Intrack Transport Management Dashboard - Modern Design System */

:root {
    /* Intrack Brand Colors */
    --primary-color: #1e40af;           /* Intrack Blue */
    --primary-dark: #1e3a8a;
    --secondary-color: #6b7280;         /* Intrack Gray */
    --accent-color: #3b82f6;            /* Light Blue */
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --alert-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #0ea5e9;
    
    /* Design System */
    --spacing: 24px;
    --spacing-sm: 12px;
    --spacing-lg: 32px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html, body {
    font-family: 'Inter', 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    letter-spacing: -0.025em;
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.75rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-brand img {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
}

.navbar-nav .nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    margin: 0 4px;
    position: relative;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.navbar-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

.navbar-nav .nav-link i {
    margin-right: 6px;
    font-size: 0.9rem;
}

/* Main Content */
.main-content {
    margin-top: 70px;
    padding: var(--spacing);
    background: var(--background-color);
    width: 100%;
}

.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
}

.page-title {
    color: var(--text-primary);
    font-weight: 800;
    font-size: 2.5rem;
    letter-spacing: -0.75px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dashboard-controls .btn {
    transition: var(--transition);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    padding: 10px 20px;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    box-shadow: var(--shadow);
}

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

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
}

/* KPI Cards */
.kpi-card {
    border: none;
    border-radius: var(--border-radius);
    background: var(--surface-color);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    border-top: 4px solid transparent;
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.kpi-card.kpi-primary { border-top-color: var(--primary-color); }
.kpi-card.kpi-success { border-top-color: var(--success-color); }
.kpi-card.kpi-warning { border-top-color: var(--warning-color); }
.kpi-card.kpi-danger { border-top-color: var(--alert-color); }
.kpi-card.kpi-info { border-top-color: var(--info-color); }
.kpi-card.kpi-secondary { border-top-color: var(--secondary-color); }

.kpi-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.kpi-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: white;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.kpi-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 100%);
    border-radius: inherit;
}

.kpi-primary .kpi-icon { background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%); }
.kpi-success .kpi-icon { background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%); }
.kpi-warning .kpi-icon { background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%); }
.kpi-danger .kpi-icon { background: linear-gradient(135deg, var(--alert-color) 0%, #dc2626 100%); }
.kpi-info .kpi-icon { background: linear-gradient(135deg, var(--info-color) 0%, #0284c7 100%); }
.kpi-secondary .kpi-icon { background: linear-gradient(135deg, var(--secondary-color) 0%, #4b5563 100%); }

.kpi-data {
    flex: 1;
    min-width: 0;
}

.kpi-value {
    font-size: 2.25rem;
    font-weight: 800;
    margin: 0;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.kpi-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Chart Cards */
.chart-card {
    border: none;
    border-radius: var(--border-radius);
    background: var(--surface-color);
    box-shadow: var(--shadow);
    height: 100%;
    transition: var(--transition);
}

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

.chart-card .card-header {
    background: linear-gradient(135deg, var(--surface-color) 0%, var(--background-color) 100%);
    border-bottom: 1px solid #e5e7eb;
    padding: 20px var(--spacing);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.chart-card .card-title {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.125rem;
    margin: 0;
    letter-spacing: -0.25px;
}

.chart-card .card-body {
    padding: var(--spacing);
}

/* Chart Containers */
canvas {
    max-width: 100%;
    height: auto !important;
}

/* Status Items */
.status-item {
    display: flex;
    align-items: center;
    padding: 8px 0;
    font-weight: 500;
}

.status-item i {
    width: 20px;
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        padding: 15px;
    }
    
    .kpi-value {
        font-size: 1.75rem;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 10px;
        margin-top: 66px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .dashboard-controls {
        margin-top: 10px;
    }
    
    .kpi-content {
        gap: 10px;
    }
    
    .kpi-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .kpi-value {
        font-size: 1.5rem;
    }
    
    .kpi-label {
        font-size: 0.8rem;
    }
}

@media (max-width: 576px) {
    .kpi-content {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    
    .kpi-data {
        order: -1;
    }
    
    .chart-card .card-body {
        padding: 15px;
    }
}

/* Animation for data updates */
.kpi-value {
    transition: all 0.3s ease;
}

.kpi-value.updating {
    color: var(--accent-color);
    transform: scale(1.05);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .kpi-card:hover {
        transform: none;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .dashboard-controls,
    .loading-spinner {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .kpi-card,
    .chart-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: #BDC3C7;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #95A5A6;
}

/* Error and Empty States */
.error-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--alert-color);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #6C757D;
}

.error-state i,
.empty-state i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}