/* ==========================================================================
   Vehicle Management System - Modern UI Styles
   Professional Blue Theme
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties (Theme Variables)
   ========================================================================== */
:root {
    /* Primary Colors */
    --color-primary-900: #0f172a;
    --color-primary-800: #1e293b;
    --color-primary-700: #1e3a5f;
    --color-primary-600: #1e4976;
    --color-primary-500: #2563eb;
    --color-primary-400: #3b82f6;
    --color-primary-300: #60a5fa;
    --color-primary-200: #93c5fd;
    --color-primary-100: #dbeafe;
    --color-primary-50: #eff6ff;

    /* Neutral Colors */
    --color-neutral-900: #111827;
    --color-neutral-800: #1f2937;
    --color-neutral-700: #374151;
    --color-neutral-600: #4b5563;
    --color-neutral-500: #6b7280;
    --color-neutral-400: #9ca3af;
    --color-neutral-300: #d1d5db;
    --color-neutral-200: #e5e7eb;
    --color-neutral-100: #f3f4f6;
    --color-neutral-50: #f9fafb;
    --color-white: #ffffff;

    /* Semantic Colors */
    --color-success-500: #10b981;
    --color-success-100: #d1fae5;
    --color-warning-500: #f59e0b;
    --color-warning-200: #fde68a;
    --color-warning-100: #fef3c7;
    --color-danger-500: #ef4444;
    --color-danger-200: #fecaca;
    --color-danger-100: #fee2e2;
    --color-info-500: #3b82f6;
    --color-info-200: #bfdbfe;
    --color-info-100: #dbeafe;

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --sidebar-bg: linear-gradient(180deg, var(--color-primary-700) 0%, var(--color-primary-900) 100%);
    --sidebar-header-bg: var(--color-primary-900);
    --sidebar-text: var(--color-neutral-200);
    --sidebar-text-muted: var(--color-neutral-400);
    --sidebar-hover-bg: rgba(255, 255, 255, 0.1);
    --sidebar-active-bg: var(--color-primary-500);
    --sidebar-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --navbar-height: 64px;
    --content-bg: var(--color-neutral-50);
    --card-bg: var(--color-white);

    /* Spacing (responsive — overridden by media queries) */
    --spacing-section: 1.5rem;
    --spacing-card: 1.25rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

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

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--content-bg);
    color: var(--color-neutral-800);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Layout - Wrapper
   ========================================================================== */
.wrapper {
    display: flex;
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================================================
   Sidebar Styles
   ========================================================================== */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - var(--navbar-height));
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    bottom: 0;
    z-index: 999;
    transition: var(--sidebar-transition);
    overflow: hidden;
}

/* Disable transitions during page load */
.sidebar.no-transition,
.sidebar.no-transition *,
.sidebar.no-transition ul li a,
.sidebar.no-transition .nav-text {
    transition: none !important;
}

#content.no-transition {
    transition: none !important;
}

/* Collapsed Sidebar */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
}

/* Sidebar Header - Removed, brand is now in unified navbar */
/* Keeping minimal styles for potential future use */
.sidebar .sidebar-header {
    display: none;
}

/* Sidebar Navigation */
.sidebar ul.components {
    padding: 1rem 0;
    margin: 0;
    list-style: none;
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar ul.components::-webkit-scrollbar {
    width: 4px;
}

.sidebar ul.components::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar ul.components::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

/* Navigation Items */
.sidebar ul li {
    margin: 0.25rem 0.75rem;
}

.sidebar ul li a {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    white-space: nowrap;
    font-size: 0.9375rem;
    font-weight: 500;
    position: relative;
}

.sidebar ul li a i {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.85;
    transition: var(--transition-fast);
}

.sidebar ul li a .nav-text {
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed ul li a .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar.collapsed ul li a .badge {
    display: none !important;
}

.sidebar ul li a:hover {
    background: var(--sidebar-hover-bg);
    color: var(--color-white);
}

.sidebar ul li a:hover i {
    opacity: 1;
}

/* Active Navigation Item */
.sidebar ul li.active > a {
    background: var(--sidebar-active-bg);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.sidebar ul li.active > a i {
    opacity: 1;
}

/* Collapsed sidebar styles */
.sidebar.collapsed ul li a {
    justify-content: center;
    padding: 0.75rem;
    gap: 0;
}

.sidebar.collapsed ul li a i {
    width: 100%;
    text-align: center;
    margin: 0;
}

.sidebar.collapsed ul li a::after {
    content: attr(data-title);
    position: absolute;
    left: calc(100% + 0.75rem);
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-neutral-800);
    color: var(--color-white);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 1001;
    box-shadow: var(--shadow-lg);
}

.sidebar.collapsed ul li a:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0.5rem 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.5rem 1rem;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-size: 0.9375rem;
    font-weight: 500;
}

.sidebar-footer a i {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer a:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.sidebar.collapsed .sidebar-footer a {
    justify-content: center;
    padding: 0.5rem;
    gap: 0;
}

.sidebar.collapsed .sidebar-footer a i {
    width: 100%;
    text-align: center;
    margin: 0;
}

.sidebar.collapsed .sidebar-footer a .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */
#content {
    flex: 1;
    min-height: 100vh;
    min-width: 0;
    display: flex;
    flex-direction: column;
    margin-left: var(--sidebar-width);
    margin-top: var(--navbar-height);
    transition: var(--sidebar-transition);
    background: var(--content-bg);
}

.sidebar.collapsed ~ #content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ==========================================================================
   Top Navbar - Unified Navy Blue Design
   ========================================================================== */
.navbar {
    height: var(--navbar-height);
    padding: 0 1rem;
    background: var(--color-white);
    border: none;
    border-bottom: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
}

.navbar.unified-navbar {
    background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-primary-900) 100%);
    border-bottom: none;
    box-shadow: var(--shadow-md);
}

.navbar .container-fluid {
    display: flex;
    align-items: center;
    width: 100%;
    --bs-gutter-x: 0;
    padding-left: 0;
    padding-right: 0;
}

/* Navbar Brand */
.navbar-brand-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: 1rem;
}

.navbar-brand-logo {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.navbar-brand-logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.navbar-brand-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    white-space: nowrap;
}

/* Sidebar Toggle Button */
#sidebarCollapse {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-neutral-100);
    border: 1px solid var(--color-neutral-200);
    border-radius: var(--radius-md);
    color: var(--color-neutral-600);
    transition: var(--transition-fast);
    cursor: pointer;
}

#sidebarCollapse:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary-200);
    color: var(--color-primary-600);
}

#sidebarCollapse i {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

/* Navbar toggle button for unified navbar */
.navbar-toggle-btn {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: var(--color-white) !important;
}

.navbar-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    color: var(--color-white) !important;
}


/* User Display */
.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary-400) 0%, var(--color-primary-600) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.625rem;
}

.unified-navbar .user-avatar {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.user-avatar i {
    font-size: 1.25rem;
    color: var(--color-white);
}

#username-display {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-neutral-700);
}

.unified-navbar #username-display {
    color: var(--color-white);
}

/* ==========================================================================
   Content Container
   ========================================================================== */
.content-container {
    flex-grow: 1;
    padding: var(--spacing-section);
}

.container {
    max-width: 1600px;
}

/* ==========================================================================
   Page Header
   ========================================================================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-neutral-200);
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-neutral-900);
    margin: 0;
}

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--color-neutral-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-neutral-300);
}

.card-header {
    background: linear-gradient(135deg, var(--color-neutral-50) 0%, var(--color-white) 100%);
    border-bottom: 1px solid var(--color-neutral-200);
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--color-neutral-800);
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-neutral-800);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title i {
    color: var(--color-primary-500);
    font-size: 1.25rem;
}

.card-text {
    color: var(--color-neutral-600);
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

/* Feature Cards (Home Page) */
.feature-card {
    height: 100%;
    border: 1px solid var(--color-neutral-200);
    transition: var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-200);
}

.feature-card .card-body {
    display: flex;
    flex-direction: column;
}

.feature-card .btn {
    margin-top: auto;
}

/* ==========================================================================
   Tables
   ========================================================================== */
.table-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-neutral-200);
    overflow: hidden;
    margin-top: 1rem;
    position: relative;
}

/* Scroll shadow indicators */
.table-container::before,
.table-container::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 20px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 2;
}

.table-container::before {
    left: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.08), transparent);
}

.table-container::after {
    right: 0;
    background: linear-gradient(to left, rgba(0,0,0,0.08), transparent);
}

.table-container.scroll-left::before,
.table-container.scroll-right::after {
    opacity: 1;
}

.table-responsive-wrapper {
    overflow-x: auto;
    overflow-y: visible;
}

.table-container--scrollable {
    max-height: 70vh;
    overflow-y: auto;
}

.text-truncate-cell {
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.table {
    margin-bottom: 0;
    font-size: 0.9375rem;
    width: 100%;
}

.table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.table thead th {
    background: linear-gradient(135deg, var(--color-neutral-100) 0%, var(--color-neutral-50) 100%);
    border-bottom: 2px solid var(--color-neutral-200);
    color: var(--color-neutral-700);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.875rem 1rem;
    white-space: nowrap;
    position: relative;
    user-select: none;
}

/* Sortable column header styles */
.table thead th.sortable {
    cursor: pointer;
    padding-right: 1.75rem;
    transition: var(--transition-fast);
}

.table thead th.sortable:hover {
    background: linear-gradient(135deg, var(--color-primary-100) 0%, var(--color-primary-50) 100%);
    color: var(--color-primary-700);
}

.table thead th.sortable::after {
    content: '';
    position: absolute;
    right: 0.625rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 5px solid var(--color-neutral-400);
    opacity: 0.4;
    transition: var(--transition-fast);
}

.table thead th.sortable::before {
    content: '';
    position: absolute;
    right: 0.625rem;
    top: 50%;
    transform: translateY(calc(-50% + 6px));
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid var(--color-neutral-400);
    opacity: 0.4;
    transition: var(--transition-fast);
}

.table thead th.sortable.sort-asc::after {
    border-bottom-color: var(--color-primary-500);
    opacity: 1;
}

.table thead th.sortable.sort-asc::before {
    opacity: 0.3;
}

.table thead th.sortable.sort-desc::before {
    border-top-color: var(--color-primary-500);
    opacity: 1;
}

.table thead th.sortable.sort-desc::after {
    opacity: 0.3;
}

.table tbody td {
    padding: 0.875rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--color-neutral-100);
    color: var(--color-neutral-700);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* Initial transparent box-shadow for smooth transition */
.table tbody td:first-child {
    box-shadow: inset 3px 0 0 transparent;
    transition: background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.table tbody tr:hover {
    background: var(--color-primary-50);
}

/* Left accent border on hover - using box-shadow on first td */
.table tbody tr:hover td:first-child {
    box-shadow: inset 3px 0 0 var(--color-primary-500);
}

.table tbody tr:hover td {
    color: var(--color-neutral-800);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Empty state */
.table-empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--color-neutral-500);
}

.table-empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.table-empty-state p {
    margin: 0;
    font-size: 1rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    font-weight: 500;
    font-size: 0.9375rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
}

.btn i {
    font-size: 1rem;
}

/* Primary Button */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
    color: var(--color-white);
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
    box-shadow: 0 4px 8px rgba(37, 99, 235, 0.4);
    transform: translateY(-1px);
    color: var(--color-white);
}

/* Secondary Button */
.btn-secondary {
    background: var(--color-neutral-100);
    color: var(--color-neutral-700);
    border: 1px solid var(--color-neutral-300);
}

.btn-secondary:hover {
    background: var(--color-neutral-200);
    color: var(--color-neutral-800);
}

/* Info Button */
.btn-info {
    background: linear-gradient(135deg, var(--color-info-500) 0%, #2563eb 100%);
    color: var(--color-white);
}

.btn-info:hover {
    background: linear-gradient(135deg, #2563eb 0%, var(--color-primary-700) 100%);
    color: var(--color-white);
}

/* Success Button */
.btn-success {
    background: linear-gradient(135deg, var(--color-success-500) 0%, #059669 100%);
    color: var(--color-white);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    color: var(--color-white);
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, var(--color-danger-500) 0%, #dc2626 100%);
    color: var(--color-white);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: var(--color-white);
}

/* Warning Button */
.btn-warning {
    background: linear-gradient(135deg, var(--color-warning-500) 0%, #d97706 100%);
    color: var(--color-white);
}

.btn-warning:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: var(--color-white);
}

/* Outline Buttons */
.btn-outline-primary {
    background: transparent;
    color: var(--color-primary-500);
    border: 1px solid var(--color-primary-500);
}

.btn-outline-primary:hover {
    background: var(--color-primary-500);
    color: var(--color-white);
}

/* Small Buttons */
.btn-sm {
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
}

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

/* Action Buttons Group */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    white-space: nowrap;
    align-items: center;
}

.action-buttons .btn {
    padding: 0.375rem 0.625rem;
}

/* Modern Action Button Style */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
    background: var(--color-neutral-100);
    border: 1px solid var(--color-neutral-200);
    color: var(--color-neutral-600);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.action-btn:active {
    transform: translateY(0);
}

/* View Button */
.action-btn.view-btn {
    background: var(--color-info-100);
    border-color: transparent;
    color: var(--color-info-500);
}

.action-btn.view-btn:hover {
    background: var(--color-info-500);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Edit Button */
.action-btn.edit-btn {
    background: var(--color-warning-100);
    border-color: transparent;
    color: #b45309;
}

.action-btn.edit-btn:hover {
    background: var(--color-warning-500);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

/* Delete Button */
.action-btn.delete-btn {
    background: var(--color-danger-100);
    border-color: transparent;
    color: var(--color-danger-500);
}

.action-btn.delete-btn:hover {
    background: var(--color-danger-500);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* Navigate Button */
.action-btn.nav-btn {
    width: auto;
    padding: 0 0.75rem;
    border-radius: 16px;
    gap: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--color-neutral-100);
    border-color: var(--color-neutral-200);
    color: var(--color-neutral-700);
}

.action-btn.nav-btn:hover {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Tooltip styling for action buttons */
.action-btn[data-tooltip] {
    position: relative;
}

.action-btn[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: 0.375rem 0.625rem;
    background: var(--color-neutral-800);
    color: var(--color-white);
    font-size: 0.6875rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.action-btn[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--color-neutral-800);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 100;
}

.action-btn[data-tooltip]:hover::after,
.action-btn[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-neutral-200);
}

.form-label {
    font-weight: 500;
    color: var(--color-neutral-700);
    margin-bottom: 0.375rem;
    font-size: 0.9375rem;
}

.form-control,
.form-select {
    border: 1px solid var(--color-neutral-300);
    border-radius: var(--radius-md);
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    color: var(--color-neutral-800);
    transition: var(--transition-fast);
    background-color: var(--color-white);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    outline: none;
}

.form-control::placeholder {
    color: var(--color-neutral-400);
}

.form-check-input {
    width: 1.125rem;
    height: 1.125rem;
    border: 2px solid var(--color-neutral-300);
    border-radius: 0.25rem;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--color-primary-500);
    border-color: var(--color-primary-500);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-check-label {
    font-size: 0.9375rem;
    color: var(--color-neutral-700);
    cursor: pointer;
}

/* Filter Container */
.filter-container {
    background: var(--card-bg);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-neutral-200);
    margin-bottom: 1rem;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-content {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
    border-bottom: none;
    padding: 1.25rem 1.5rem;
}

.modal-title {
    color: var(--color-white);
    font-weight: 600;
    font-size: 1.125rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.modal-header .btn-close:hover {
    opacity: 1;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-neutral-200);
    background: var(--color-neutral-50);
}

/* Details Modal */
.details-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.details-row {
    display: flex;
    padding: 0.75rem;
    background: var(--color-neutral-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-neutral-100);
}

.details-label {
    font-weight: 600;
    color: var(--color-neutral-700);
    min-width: 140px;
    flex-shrink: 0;
}

.details-value {
    color: var(--color-neutral-600);
    word-break: break-word;
}

/* ==========================================================================
   Confirmation Modal
   ========================================================================== */
.confirm-modal .modal-header {
    background: linear-gradient(135deg, var(--color-danger-500) 0%, #dc2626 100%);
}

.confirm-modal-body {
    text-align: center;
    padding: 2rem 1.5rem;
}

.confirm-modal-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-danger-100);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.confirm-modal-icon i {
    font-size: 2rem;
    color: var(--color-danger-500);
}

.confirm-modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-neutral-800);
    margin-bottom: 0.5rem;
}

.confirm-modal-message {
    color: var(--color-neutral-600);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

.confirm-modal-item {
    display: inline-block;
    background: var(--color-neutral-100);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    color: var(--color-neutral-700);
    margin-top: 0.75rem;
}

.confirm-modal-footer {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-neutral-200);
    background: var(--color-neutral-50);
}

.confirm-modal-footer .btn {
    min-width: 100px;
}

/* ==========================================================================
   Violation Details Modal (Wide Layout)
   ========================================================================== */
.modal-violation-details {
    max-width: 1000px;
}

.violation-details-layout {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 1.5rem;
    min-height: 400px;
}

.violation-image-section {
    display: flex;
    flex-direction: column;
}

.violation-image-container {
    position: relative;
    flex: 1;
    background: var(--color-neutral-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    border: 1px solid var(--color-neutral-200);
}

.violation-image-container img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.violation-image-expand {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease;
    border: none;
}

.violation-image-container:hover .violation-image-expand {
    opacity: 1;
}

.violation-image-expand:hover {
    background: rgba(0, 0, 0, 0.8);
}

.violation-no-image {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-neutral-500);
    padding: 2rem;
}

.violation-no-image i {
    font-size: 3rem;
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.violation-info-section {
    display: flex;
    flex-direction: column;
}

.violation-info-list {
    flex: 1;
    overflow-y: auto;
    max-height: 400px;
}

.violation-info-item {
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background: var(--color-neutral-50);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
}

.violation-info-item:last-child {
    margin-bottom: 0;
}

.violation-info-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-neutral-500);
    margin-bottom: 0.25rem;
}

.violation-info-value {
    font-size: 0.9375rem;
    color: var(--color-neutral-800);
    font-weight: 500;
}

.violation-info-value.status-badge {
    display: inline-block;
    width: fit-content;
}

.violation-actions-bar {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-neutral-200);
}

/* Navigation Arrows for Violation Details Modal */
.violation-modal-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    margin-right: 0.75rem;
}

.violation-nav-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    padding: 0;
    font-size: 0.875rem;
}

.violation-nav-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.violation-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.violation-nav-counter {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
    min-width: 50px;
    text-align: center;
}

/* ==========================================================================
   Alerts
   ========================================================================== */
.alert {
    border-radius: var(--radius-md);
    border: none;
    padding: 0.875rem 1.25rem;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.alert-success {
    background: var(--color-success-100);
    color: #065f46;
}

.alert-danger {
    background: var(--color-danger-100);
    color: #991b1b;
}

.alert-warning {
    background: var(--color-warning-100);
    color: #92400e;
}

.alert-info {
    background: var(--color-info-100);
    color: #1e40af;
}

/* ==========================================================================
   Badges
   ========================================================================== */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.375rem 0.625rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.bg-success {
    background: linear-gradient(135deg, var(--color-success-500) 0%, #059669 100%) !important;
}

.bg-danger {
    background: linear-gradient(135deg, var(--color-danger-500) 0%, #dc2626 100%) !important;
}

.bg-warning {
    background: linear-gradient(135deg, var(--color-warning-500) 0%, #d97706 100%) !important;
    color: var(--color-white) !important;
}

.bg-info {
    background: linear-gradient(135deg, var(--color-info-500) 0%, #2563eb 100%) !important;
}

.bg-secondary {
    background: linear-gradient(135deg, var(--color-neutral-500) 0%, var(--color-neutral-600) 100%) !important;
}

.bg-primary {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%) !important;
}

.bg-light {
    background: var(--color-neutral-200) !important;
    color: var(--color-neutral-700) !important;
}

/* ==========================================================================
   Pagination
   ========================================================================== */
.pagination-controls {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding: 1rem;
}

.pagination-controls .btn {
    min-width: 100px;
}

/* Enhanced Pagination */
.pagination-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--color-neutral-50);
    border-top: 1px solid var(--color-neutral-200);
    margin-top: 0;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--color-neutral-600);
}

.pagination-info strong {
    color: var(--color-neutral-800);
}

.pagination-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.5rem;
    border: 1px solid var(--color-neutral-200);
    background: var(--color-white);
    color: var(--color-neutral-700);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    background: var(--color-primary-50);
    border-color: var(--color-primary-200);
    color: var(--color-primary-600);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-btn.active {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
    color: var(--color-white);
}

.pagination-btn.prev-btn,
.pagination-btn.next-btn {
    padding: 0 0.75rem;
}

.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--color-neutral-400);
    font-size: 0.875rem;
}

.pagination-per-page {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-neutral-600);
}

.pagination-per-page select {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--color-neutral-200);
    border-radius: var(--radius-md);
    background: var(--color-white);
    font-size: 0.875rem;
    color: var(--color-neutral-700);
    cursor: pointer;
}

.pagination-per-page select:focus {
    outline: none;
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.text-muted {
    color: var(--color-neutral-500) !important;
}

.text-primary {
    color: var(--color-primary-500) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* ==========================================================================
   Loading States
   ========================================================================== */
.btn-loading {
    position: relative;
    pointer-events: none;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-spinner 0.6s linear infinite;
}

@keyframes btn-spinner {
    to { transform: rotate(360deg); }
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--color-neutral-100) 25%, var(--color-neutral-200) 50%, var(--color-neutral-100) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    width: 60%;
}

/* ==========================================================================
   Status Row Highlighting (Violations)
   ========================================================================== */
.table tbody tr.status-row-approved > * {
    background-color: var(--color-success-100) !important;
}

.table tbody tr.status-row-approved:hover > * {
    background-color: #a7f3d0 !important;
}

.table tbody tr.status-row-rejected > * {
    background-color: var(--color-danger-100) !important;
}

.table tbody tr.status-row-rejected:hover > * {
    background-color: #fecaca !important;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

/* Ultra-wide desktops (1920px+) */
@media (min-width: 1920px) {
    .container {
        max-width: 1800px;
    }
}

/* Large desktops (1440px+) */
@media (min-width: 1440px) {
    :root {
        --spacing-section: 2rem;
        --spacing-card: 1.5rem;
    }
}

/* Small desktops / laptops (1024px – 1279px) */
@media (max-width: 1279px) {
    :root {
        --sidebar-width: 220px;
    }

    .sidebar {
        width: var(--sidebar-width);
        min-width: var(--sidebar-width);
    }

    .sidebar ul li a {
        padding: 0.625rem 0.875rem;
        font-size: 0.875rem;
    }

    #content {
        margin-left: var(--sidebar-width);
    }

    .content-container {
        padding: 1rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .action-btn {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    #content {
        margin-left: 0;
    }
    
    .sidebar.collapsed ~ #content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .action-buttons {
        flex-wrap: wrap;
    }
    
    .content-container {
        padding: 1rem;
    }
}

/* ==========================================================================
   Mobile Responsive Enhancements
   ========================================================================== */

/* --- Violation/Alert Details Modal: stack to single column on mobile --- */
@media (max-width: 768px) {
    .modal-violation-details {
        max-width: 100%;
        margin: 0.5rem;
    }
    .violation-details-layout {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    .violation-image-container {
        min-height: 200px;
    }
    .violation-info-list {
        max-height: none;
    }
    .violation-actions-bar {
        flex-wrap: wrap;
    }
    .violation-nav-btn {
        width: 36px;
        height: 36px;
    }
}

/* --- Small phone adjustments (≤576px) --- */
@media (max-width: 576px) {
    /* Navbar: hide brand text and username to prevent overflow */
    .navbar-brand-text {
        display: none;
    }
    #username-display {
        display: none;
    }
    .navbar-brand-logo-img {
        width: 32px;
        height: 32px;
    }

    /* Pagination: wrap controls */
    .pagination-wrapper {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
    .pagination-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    .pagination-controls {
        flex-wrap: wrap;
    }
    .pagination-btn {
        min-width: 32px;
        height: 32px;
    }

    /* Details modal: stack label/value vertically */
    .details-row {
        flex-direction: column;
        gap: 0.25rem;
    }
    .details-label {
        min-width: auto;
    }

    /* Page header: full-width buttons */
    .page-header .btn {
        width: 100%;
        justify-content: center;
    }
}

/* --- Very small phones (≤480px) --- */
@media (max-width: 480px) {
    .content-container {
        padding: 0.5rem;
    }
    .card-body {
        padding: 0.75rem;
    }
    .card-header {
        padding: 0.75rem;
    }
    .modal-body {
        padding: 1rem;
    }
    .confirm-modal-body {
        padding: 1.5rem 1rem;
    }
    .confirm-modal-icon {
        width: 48px;
        height: 48px;
    }
    .confirm-modal-icon i {
        font-size: 1.5rem;
    }
    .btn {
        font-size: 0.875rem;
        padding: 0.4375rem 0.875rem;
    }
    .table tbody td,
    .table thead th {
        padding: 0.625rem 0.5rem;
        font-size: 0.8125rem;
    }
}

/* --- Tiny phones (≤375px) --- */
@media (max-width: 375px) {
    .content-container {
        padding: 0.375rem;
    }
    .page-header h1 {
        font-size: 1.25rem;
    }
}

/* ==========================================================================
   Scrollbar Styling
   ========================================================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-neutral-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--color-neutral-300);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-neutral-400);
}

/* ==========================================================================
   Animation Keyframes
   ========================================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

.slide-in {
    animation: slideIn 0.3s ease-out forwards;
}