/* ===================================================================
   SHARED BASE CSS - Variables, Utilities & Foundation Styles
   IntelliFleet360 - Centralized CSS Variables and Base Utilities
   =================================================================== */

/* ================================= 
   CSS VARIABLES - Single Source of Truth
   ================================= */
:root {
    /* Primary Brand Colors */
    --fleet-primary: #0d6efd;
    --fleet-primary-rgb: 13, 110, 253;
    --fleet-primary-dark: #0a58ca;
    --fleet-primary-light: #3d8bfd;
    
    /* Extended Color Palette */
    --fleet-secondary: #6c757d;
    --fleet-success: #198754;
    --fleet-warning: #ffc107;
    --fleet-danger: #dc3545;
    --fleet-info: #0dcaf0;
    --fleet-light: #f8f9fa;
    --fleet-dark: #212529;
    
    /* Severity Colors */
    --critical-color: #dc3545;
    --warning-alert-color: #fd7e14;
    --informational-color: #0dcaf0;
    
    /* Gradient Definitions */
    --fleet-primary-gradient: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
    --fleet-success-gradient: linear-gradient(135deg, #198754 0%, #20c997 100%);
    --fleet-warning-gradient: linear-gradient(135deg, #ffc107 0%, #fd7e14 100%);
    --fleet-info-gradient: linear-gradient(135deg, #0dcaf0 0%, #3dd5f3 100%);
    --fleet-danger-gradient: linear-gradient(135deg, #dc3545 0%, #fd5c63 100%);
    --fleet-secondary-gradient: linear-gradient(135deg, #6c757d 0%, #495057 100%);
    --critical-gradient: linear-gradient(135deg, #fd5c63 0%, var(--critical-color) 100%);
    --warning-alert-gradient: linear-gradient(135deg, #fd9827 0%, var(--warning-alert-color) 100%);
    --informational-gradient: linear-gradient(135deg, #3dd5f3 0%, var(--informational-color) 100%);
    
    /* Shadow System */
    --fleet-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --fleet-shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.1);
    --fleet-shadow-xl: 0 15px 35px rgba(0, 0, 0, 0.15);
    --fleet-shadow-hover: 0 8px 30px rgba(var(--fleet-primary-rgb), 0.15);
    
    /* Border Radius System */
    --fleet-border-radius: 0.75rem;
    --fleet-border-radius-sm: 0.5rem;
    --fleet-border-radius-lg: 1rem;
    --fleet-border-radius-xl: 1.5rem;
    --fleet-border-radius-xxl: 2rem;
    
    /* Transition System */
    --fleet-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --fleet-transition-fast: all 0.15s ease-in-out;
    --fleet-transition-slow: all 0.5s ease-in-out;
    
    /* Layout Variables */
    --sidebar-width: 210px;
    --sidebar-collapsed-width: 60px;
    --navbar-height: 70px;
    
    /* Card System Variables */
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(var(--fleet-primary-rgb), 0.1);
    --card-header-bg: linear-gradient(135deg, rgba(var(--fleet-primary-rgb), 0.05) 0%, rgba(var(--fleet-primary-rgb), 0.02) 100%);
    --card-shadow: var(--fleet-shadow);
    --card-shadow-lg: var(--fleet-shadow-lg);
    --card-hover-shadow: var(--fleet-shadow-hover);
    
    /* Backdrop Filter */
    --backdrop-filter: blur(10px);
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-monospace: ui-monospace, 'SF Mono', 'Monaco', 'Cascadia Code', 'Segoe UI Mono', 'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Code', 'Droid Sans Mono', 'Courier New', monospace;
}

/* ================================= 
   DARK THEME VARIABLES
   ================================= */
[data-bs-theme="dark"] {
    /* Adjusted Primary Colors for Dark Mode */
    --fleet-primary: #6ea8fe;
    --fleet-primary-rgb: 110, 168, 254;
    --fleet-primary-dark: #0d6efd;
    --fleet-primary-light: #8bb9fe;
    
    /* Dark Mode Card System */
    --card-bg: rgba(33, 37, 41, 0.9);
    --card-border: rgba(var(--fleet-primary-rgb), 0.2);
    --card-header-bg: linear-gradient(135deg, rgba(var(--fleet-primary-rgb), 0.15) 0%, rgba(var(--fleet-primary-rgb), 0.08) 100%);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    --card-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.3);
    --card-hover-shadow: 0 12px 40px rgba(var(--fleet-primary-rgb), 0.2);
    
    /* Dark Mode Bootstrap Overrides */
    --bs-body-bg: var(--fleet-dark);
    --bs-body-color: var(--fleet-light);
    --bs-tertiary-bg: #2b3035;
    --bs-secondary-bg: #343a40;
    --bs-border-color: rgba(255, 255, 255, 0.15);
    --bs-border-color-translucent: rgba(255, 255, 255, 0.1);
    --bs-body-secondary-color: #9ca3af;
}

/* ================================= 
   UTILITY CLASSES
   ================================= */

/* Spacing Utilities */
.fleet-p-0 { padding: 0 !important; }
.fleet-p-1 { padding: 0.25rem !important; }
.fleet-p-2 { padding: 0.5rem !important; }
.fleet-p-3 { padding: 1rem !important; }
.fleet-p-4 { padding: 1.5rem !important; }
.fleet-p-5 { padding: 3rem !important; }

.fleet-m-0 { margin: 0 !important; }
.fleet-m-1 { margin: 0.25rem !important; }
.fleet-m-2 { margin: 0.5rem !important; }
.fleet-m-3 { margin: 1rem !important; }
.fleet-m-4 { margin: 1.5rem !important; }
.fleet-m-5 { margin: 3rem !important; }

/* Border Radius Utilities */
.rounded-fleet { border-radius: var(--fleet-border-radius) !important; }
.rounded-fleet-sm { border-radius: var(--fleet-border-radius-sm) !important; }
.rounded-fleet-lg { border-radius: var(--fleet-border-radius-lg) !important; }
.rounded-fleet-xl { border-radius: var(--fleet-border-radius-xl) !important; }

/* Shadow Utilities */
.shadow-fleet { box-shadow: var(--fleet-shadow) !important; }
.shadow-fleet-lg { box-shadow: var(--fleet-shadow-lg) !important; }
.shadow-fleet-xl { box-shadow: var(--fleet-shadow-xl) !important; }

/* Background Utilities */
.bg-fleet-primary { background-color: var(--fleet-primary) !important; }
.bg-fleet-primary-gradient { background: var(--fleet-primary-gradient) !important; }
.bg-fleet-success-gradient { background: var(--fleet-success-gradient) !important; }
.bg-fleet-warning-gradient { background: var(--fleet-warning-gradient) !important; }
.bg-fleet-danger-gradient { background: var(--fleet-danger-gradient) !important; }

/* Text Utilities */
.text-fleet-primary { color: var(--fleet-primary) !important; }
.text-fleet-secondary { color: var(--fleet-secondary) !important; }
.text-fleet-success { color: var(--fleet-success) !important; }
.text-fleet-warning { color: var(--fleet-warning) !important; }
.text-fleet-danger { color: var(--fleet-danger) !important; }

/* Animation Utilities */
.transition-fleet { transition: var(--fleet-transition) !important; }
.transition-fleet-fast { transition: var(--fleet-transition-fast) !important; }
.transition-fleet-slow { transition: var(--fleet-transition-slow) !important; }

/* Hover Effects */
.hover-lift {
    transition: var(--fleet-transition);
}
.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--fleet-shadow-lg);
}

.hover-scale {
    transition: var(--fleet-transition);
}
.hover-scale:hover {
    transform: scale(1.02);
}

/* Backdrop Filter Utilities */
.backdrop-blur { backdrop-filter: var(--backdrop-filter); }
.backdrop-blur-sm { backdrop-filter: blur(5px); }
.backdrop-blur-lg { backdrop-filter: blur(20px); }

/* ================================= 
   GLOBAL BASE STYLES
   ================================= */
body {
    font-family: var(--font-family-base);
    font-weight: 400;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding-top: var(--navbar-height);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-bs-theme="light"] .main-content {
    background-color: #e9ecef;
}

/* ================================= 
   TYPOGRAPHY SYSTEM - ALERTS PAGE STANDARD
   ================================= */

/* Standardized Headings - Following Alerts Page Pattern */
h1, .h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

h2, .h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

h3, .h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

h4, .h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

h5, .h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

h6, .h6 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

/* Page Title Components - Alerts Page Style */
.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.page-subtitle {
    color: var(--bs-secondary-color);
    font-size: 1rem;
    margin-bottom: 0;
    font-weight: 400;
}

/* Card Title Components */
.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

/* Text Utilities - Alerts Page Pattern */
.fw-bold {
    font-weight: 700 !important;
}

.fw-semibold {
    font-weight: 600 !important;
}

.fw-medium {
    font-weight: 500 !important;
}

.fw-normal {
    font-weight: 400 !important;
}

/* Small Text Styling */
small, .small {
    font-size: 0.875rem;
    font-weight: 400;
}

.text-muted small, 
.text-body-secondary small {
    font-size: 0.8rem;
}

/* Form Labels - Consistent Styling */
.form-label {
    font-weight: 500;
    color: var(--bs-emphasis-color);
    margin-bottom: 0.5rem;
}

.form-label.small {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Button Typography */
.btn {
    font-weight: 500;
    font-family: var(--font-family-base);
}

.btn-sm {
    font-size: 0.875rem;
}

/* Breadcrumb Typography */
.breadcrumb-item {
    font-size: 0.9rem;
    font-weight: 400;
}

.breadcrumb-item.active {
    font-weight: 500;
}

/* Table Headers */
.table thead th {
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Badge Typography */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
}

/* Responsive Typography */
@media (max-width: 768px) {
    h1, .h1 {
        font-size: 1.75rem;
    }
    
    h2, .h2 {
        font-size: 1.5rem;
    }
    
    .page-title {
        font-size: 1.75rem;
    }
}

/* ================================= 
   ANIMATIONS
   ================================= */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ================================= 
   ACCESSIBILITY IMPROVEMENTS
   ================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.form-control:focus,
.nav-link:focus {
    outline: 2px solid var(--fleet-primary);
    outline-offset: 2px;
}

/* ================================= 
   PRINT STYLES
   ================================= */
@media print {
    .sidebar,
    .navbar,
    .btn,
    .pagination,
    .breadcrumb {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
        padding: 1rem !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        break-inside: avoid;
    }
}