/* ========================================================================
   Connecta - Modern Design System 2025 - UPDATED 01:15
   ======================================================================== */

/* ========================================================================
   CSS Variables - Design Tokens
   ======================================================================== */
:root {
    /* Layout */
    --sidebar-width: 280px;
    --topbar-height: 64px;
    --content-max-width: 1400px;
    
    /* Colors - Primary Palette */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --primary-dark: #1e40af;
    
    /* Colors - Semantic */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #0ea5e9;
    --info-light: #e0f2fe;
    
    /* Neutrals */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Sidebar - LIGHT TEXT ON DARK BG */
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1; /* Light gray for visibility */
    --sidebar-hover: #334155;
    --sidebar-active: var(--primary);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    
    /* 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);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

/* ========================================================================
   Base Styles
   ======================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================================================
   Layout Structure
   ======================================================================== */
#wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
#sidebar-wrapper {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--sidebar-bg) 0%, #0f172a 100%);
    color: var(--sidebar-text) !important;
    transition: transform var(--transition-base);
    z-index: 1000;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.sidebar-heading {
    padding: var(--space-xl) var(--space-lg);
    background: rgba(37, 99, 235, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-heading h5 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #fff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Page Content */
#page-content-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin var(--transition-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Page Content - full width when no sidebar */
#wrapper:not(.has-sidebar) #page-content-wrapper {
    margin-left: 0;
}


/* Sidebar Navigation */
.list-group-flush {
    padding: var(--space-md) 0;
}

.list-group-item {
    background: transparent;
    border: none;
    padding: var(--space-sm) var(--space-lg);
    margin: 2px var(--space-sm);
    border-radius: var(--radius);
    color: var(--sidebar-text) !important;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
    font-size: 0.9375rem;
}

.list-group-item i {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
    opacity: 0.9;
}

.list-group-item:hover {
    background: var(--sidebar-hover);
    color: #e2e8f0 !important;
    transform: translateX(4px);
}

.list-group-item.active {
    background: var(--sidebar-active);
    color: #ffffff !important;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

.list-group-item.active i {
    opacity: 1;
}

/* Sidebar Section Headers */
.sidebar-section-header {
    padding: var(--space-lg) var(--space-lg) var(--space-xs) var(--space-lg);
    margin-top: var(--space-md);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
}

/* Mobile Sidebar Toggle */
@media (max-width: 768px) {
    #sidebar-wrapper {
        transform: translateX(-100%);
    }

    #sidebar-wrapper.active {
        transform: translateX(0);
    }

    #page-content-wrapper {
        margin-left: 0;
    }
    
    /* Overlay when sidebar is open on mobile */
    #sidebar-wrapper.active::after {
        content: '';
        position: fixed;
        top: 0;
        left: var(--sidebar-width);
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }
}

/* ========================================================================
   Topbar / Navigation
   ======================================================================== */
.navbar {
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    padding: 0 var(--space-lg);
}

#sidebarToggle {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    border: 1px solid var(--gray-300);
    background: #fff;
    color: var(--gray-700);
    transition: all var(--transition-fast);
}

#sidebarToggle:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
    transform: scale(1.05);
}

#sidebarToggle .navbar-toggler-icon {
    width: 20px;
    height: 20px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(55, 65, 81, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================================================
   Main Content Area
   ======================================================================== */
.container-fluid {
    max-width: var(--content-max-width);
    padding: var(--space-xl);
}

@media (max-width: 768px) {
    .container-fluid {
        padding: var(--space-md);
    }
}


/* ========================================================================
   Typography
   ======================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--gray-900);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.page-title i {
    color: var(--primary);
}

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

/* ========================================================================
   Cards
   ======================================================================== */
.card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    overflow: hidden;
}

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

.card-header {
    background: linear-gradient(135deg, var(--gray-50) 0%, #fff 100%);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-lg);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: var(--space-md) var(--space-lg);
}

/* Card Stats */
.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: #fff;
    border: none;
}

.stat-card .card-body {
    padding: var(--space-xl);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================================================
   Buttons
   ======================================================================== */
.btn {
    font-weight: 500;
    border-radius: var(--radius);
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
}

.btn:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.btn-info {
    background: var(--info);
    color: #fff;
}

.btn-info:hover {
    background: #0284c7;
    transform: translateY(-1px);
}

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

.btn-outline-primary:hover {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
}

/* Icon Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

/* Button Group */
.btn-group {
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius);
    overflow: hidden;
}


/* ========================================================================
   Tables
   ======================================================================== */
.table-container {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.table thead {
    background: linear-gradient(135deg, var(--gray-50) 0%, #fff 100%);
    border-bottom: 2px solid var(--gray-200);
}

.table thead th {
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    padding: var(--space-md) var(--space-lg);
    border: none;
    white-space: nowrap;
    vertical-align: middle;
}

.table thead th a {
    color: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.table thead th a:hover {
    color: var(--primary);
}

.table tbody tr {
    border-bottom: 1px solid var(--gray-100);
    transition: all var(--transition-fast);
}

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

.table tbody tr:hover {
    background: var(--primary-light);
    transform: scale(1.001);
}

.table tbody td {
    padding: var(--space-md) var(--space-lg);
    vertical-align: middle;
    color: var(--gray-800);
}

.table .col-actions {
    width: 1%;
    white-space: nowrap;
    text-align: right;
}

/* Table Actions */
.table-actions {
    display: flex;
    gap: var(--space-xs);
    justify-content: flex-end;
    align-items: center;
}

/* Modern Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: nowrap;
}

.btn-action {
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    border-radius: var(--radius);
    border: none;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    box-shadow: var(--shadow-sm);
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

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

.btn-action-info {
    background: var(--info);
    color: #fff;
}

.btn-action-info:hover {
    background: #0284c7;
    color: #fff;
}

.btn-action-primary {
    background: var(--success);
    color: #fff;
}

.btn-action-primary:hover {
    background: #059669;
    color: #fff;
}

.btn-action-danger {
    background: var(--danger);
    color: #fff;
}

.btn-action-danger:hover {
    background: #dc2626;
    color: #fff;
}

/* Action button sizes */
.btn-action-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

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

/* Bootstrap button overrides for Details pages */
.btn-sm.btn-outline-primary,
.btn-sm.btn-outline-danger,
.btn-sm.btn-outline-secondary,
.btn-sm.btn-outline-success,
.btn-sm.btn-outline-info {
    border-width: 2px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-sm.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-sm.btn-outline-primary:hover {
    background-color: var(--primary);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-sm.btn-outline-danger {
    color: var(--danger);
    border-color: var(--danger);
}

.btn-sm.btn-outline-danger:hover {
    background-color: var(--danger);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-sm.btn-outline-secondary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* List group actions */
.list-group-item-action {
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    color: var(--gray-900);
    font-weight: 500;
}

.list-group-item-action:hover {
    border-left-color: var(--primary);
    background: var(--primary);
    color: #ffffff;
    transform: translateX(4px);
}

.list-group-item-action.text-danger {
    color: var(--danger);
}

.list-group-item-action.text-danger:hover {
    border-left-color: var(--danger);
    background: var(--danger);
    color: #ffffff;
}

/* Responsive Table */
@media (max-width: 768px) {
    .table-responsive {
        border-radius: var(--radius-md);
        box-shadow: var(--shadow);
    }
    
    .table thead th {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.75rem;
    }
    
    .table tbody td {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.875rem;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .btn-action {
        width: 100%;
        justify-content: center;
    }
}


/* ========================================================================
   Forms
   ======================================================================== */
.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-xs);
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.form-label.required::after {
    content: '*';
    color: var(--danger);
    margin-left: 2px;
}

.form-control,
.form-select {
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 0.625rem var(--space-md);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    background: #fff;
}

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

.form-control:disabled,
.form-select:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.invalid-feedback {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.invalid-feedback::before {
    content: '⚠';
}

.form-text {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

/* Form Groups */
.form-group {
    margin-bottom: var(--space-lg);
}

/* Input Groups */
.input-group {
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius);
    overflow: hidden;
}

.input-group-text {
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    border-right: none;
    color: var(--gray-600);
    font-weight: 500;
}

/* ========================================================================
   Badges
   ======================================================================== */
.badge {
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    letter-spacing: 0.025em;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.badge-lg {
    padding: 0.5rem 1rem;
    font-size: 0.9375rem;
}

.badge-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.badge.bg-success {
    background: var(--success) !important;
    color: #fff;
}

.badge.bg-warning {
    background: var(--warning) !important;
    color: var(--gray-900);
}

.badge.bg-danger {
    background: var(--danger) !important;
    color: #fff;
}

.badge.bg-info {
    background: var(--info) !important;
    color: #fff;
}

.badge.bg-primary {
    background: var(--primary) !important;
    color: #fff;
}

.badge.bg-secondary {
    background: var(--gray-500) !important;
    color: #fff;
}

/* ========================================================================
   Alerts & Notifications
   ======================================================================== */
.alert {
    border: none;
    border-left: 4px solid;
    border-radius: var(--radius);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.alert::before {
    content: '';
    font-family: 'bootstrap-icons';
    font-size: 1.25rem;
    flex-shrink: 0;
}

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

.alert-success::before {
    content: '\f26c';
    color: var(--success);
}

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

.alert-danger::before {
    content: '\f33a';
    color: var(--danger);
}

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

.alert-warning::before {
    content: '\f33d';
    color: var(--warning);
}

.alert-info {
    background: var(--info-light);
    border-color: var(--info);
    color: #075985;
}

.alert-info::before {
    content: '\f331';
    color: var(--info);
}

.alert .btn-close {
    margin-left: auto;
}

/* Toast Notifications */
.toast {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
}

/* ========================================================================
   Tabs
   ======================================================================== */
.nav-tabs {
    border-bottom: 2px solid var(--gray-200);
    gap: var(--space-xs);
}

.nav-tabs .nav-link {
    color: var(--gray-600);
    border: none;
    border-bottom: 3px solid transparent;
    padding: var(--space-md) var(--space-lg);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: 0;
    margin-bottom: -2px;
}

.nav-tabs .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
    border-bottom-color: var(--primary);
}

.nav-tabs .nav-link.active {
    color: var(--primary);
    background: transparent;
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tab-content {
    padding: var(--space-xl) 0;
}

/* ========================================================================
   Search & Filters
   ======================================================================== */
.search-box {
    position: relative;
    max-width: 400px;
}

.search-box input {
    padding-left: 2.75rem;
}

.search-box::before {
    content: '\f52a';
    font-family: 'bootstrap-icons';
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1.125rem;
    pointer-events: none;
    z-index: 10;
}

.filter-bar {
    background: #fff;
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    margin-bottom: var(--space-xl);
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    align-items: end;
}

/* ========================================================================
   Pagination
   ======================================================================== */
.pagination {
    gap: var(--space-xs);
}

.page-link {
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.page-link:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.page-item.disabled .page-link {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-400);
}

/* ========================================================================
   Loading & Spinners
   ======================================================================== */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loader */
.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}

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

/* ========================================================================
   Empty States
   ======================================================================== */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
    color: var(--gray-500);
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: var(--space-lg);
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.empty-state-text {
    font-size: 1rem;
    color: var(--gray-500);
    margin-bottom: var(--space-lg);
}

/* ========================================================================
   Custom Scrollbar
   ======================================================================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius);
    border: 2px solid var(--gray-100);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--gray-400) var(--gray-100);
}

/* ========================================================================
   Utility Classes
   ======================================================================== */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.border-start-primary {
    border-left: 4px solid var(--primary) !important;
}

.border-start-success {
    border-left: 4px solid var(--success) !important;
}

.border-start-danger {
    border-left: 4px solid var(--danger) !important;
}

.border-start-warning {
    border-left: 4px solid var(--warning) !important;
}

/* Spacing Utilities */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Background Utilities */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
}

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

/* ========================================================================
   Focus States (Accessibility)
   ======================================================================== */
a:focus,
button:focus,
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* Skip to Content Link (Accessibility) */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary);
    color: #fff;
    padding: var(--space-md) var(--space-lg);
    z-index: 10000;
    border-radius: 0 0 var(--radius) 0;
}

.skip-to-content:focus {
    top: 0;
}

/* ========================================================================
   Print Styles
   ======================================================================== */
@media print {
    #sidebar-wrapper,
    .navbar,
    .btn,
    .card-footer,
    .action-buttons {
        display: none !important;
    }

    #page-content-wrapper {
        margin-left: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
        page-break-inside: avoid;
    }

    body {
        background: #fff;
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

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

.slide-in-right {
    animation: slideInRight var(--transition-base) ease-out;
}

/* ========================================================================
   Responsive Utilities
   ======================================================================== */
@media (max-width: 576px) {
    .page-title {
        font-size: 1.5rem;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .card-body {
        padding: var(--space-md);
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .search-box {
        max-width: 100%;
    }
}

/* ========================================================================
   Dark Mode Ready (for future implementation)
   ======================================================================== */
@media (prefers-color-scheme: dark) {
    /* Add dark mode styles here when ready */
}