:root {
    /* Color Palette */
    --brand-primary: #0D9488;
    --brand-primary-hover: #0F766E;
    --brand-primary-light: #CCFBF1;
    --brand-secondary: #64748B;
    --brand-secondary-hover: #475569;
    
    --bg-body: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-sidebar: #FFFFFF;
    --sidebar-text: #334155;
    --sidebar-active-bg: #E0F2FE;
    --sidebar-active-text: #0369A1;
    
    /* Semantic Colors (Muted) */
    --color-success: #10B981;
    --color-success-bg: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-bg: #FEF3C7;
    --color-danger: #EF4444;
    --color-danger-bg: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-bg: #DBEAFE;
    
    /* Typography */
    --font-family-base: 'Inter', system-ui, -apple-system, sans-serif;
    --text-primary: #0F172A;
    --text-muted: #64748B;
    
    /* Spacing Scale (Made more compact) */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 10px;
    --border-color: #E2E8F0;
}

html {
    font-size: 14px; /* Scales down the entire UI to 75% of default 16px, mimicking 75% zoom */
}

body {
    font-family: var(--font-family-base);
    background-color: var(--bg-body);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    font-size: 1rem; /* Equivalent to 12px now */
    margin: 0;
}

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

/* Sidebar */
.app-sidebar {
    width: 240px; /* Reduced width */
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 1040;
}

.sidebar-header {
    height: 60px; /* Reduced height */
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--brand-primary);
}

.sidebar-menu {
    padding: var(--spacing-sm) 0;
    flex: 1;
    overflow-y: auto;
}

.sidebar-heading {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.7rem; /* Smaller heading */
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-top: var(--spacing-md);
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.45rem var(--spacing-md);
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem; /* 14px link text */
    transition: all 0.2s ease;
    margin: 0.15rem var(--spacing-sm);
    border-radius: var(--border-radius-md);
}

.sidebar-link i {
    width: 24px;
    margin-right: var(--spacing-sm);
    color: var(--text-muted);
    text-align: center;
}

.sidebar-link:hover {
    background-color: var(--bg-body);
}

.sidebar-link.active {
    background-color: var(--brand-primary-light);
    color: var(--brand-primary);
}

.sidebar-link.active i {
    color: var(--brand-primary);
}

/* Main Content Area */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Important for flex layout to truncate children */
}

/* Navbar */
.app-navbar {
    height: 60px; /* Reduced height */
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 1030;
}

.navbar-toggler-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-sm);
    display: none;
}

/* Page Content */
.page-content {
    padding: var(--spacing-lg);
    flex: 1;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* =========================================
   Components
========================================= */

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    transition: box-shadow 0.2s ease;
}

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

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h1, .card-header h2, .card-header h3, .card-header h4, .card-header h5, .card-header h6 {
    margin: 0;
    font-weight: 600;
    font-size: 0.95rem;
}

.card-body {
    padding: 1rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: var(--border-radius-md);
    padding: 0.4rem 0.8rem; /* Slightly smaller default padding */
    transition: all 0.2s ease;
    font-size: 0.8125rem;
}

.btn-sm {
    padding: 0.2rem 0.4rem;
    font-size: 0.7rem;
    line-height: 1.2;
    border-radius: var(--border-radius-sm);
}

.btn-primary {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white !important;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--brand-primary-hover);
    border-color: var(--brand-primary-hover);
    box-shadow: var(--shadow-sm);
    color: white !important;
}

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

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

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

.btn-outline-info:hover {
    background-color: var(--color-info);
    color: white !important;
}

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

.btn-outline-danger:hover {
    background-color: var(--color-danger);
    color: white !important;
}

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

.btn-outline-warning:hover {
    background-color: var(--color-warning);
    color: white !important;
}

.btn-secondary {
    background-color: white;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-body);
    border-color: var(--text-muted);
    color: var(--text-primary) !important;
}

/* Forms */
.form-label {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.form-control, .form-select {
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.6rem;
    font-size: 0.8125rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 0.25rem var(--brand-primary-light);
}

.mb-3 {
    margin-bottom: var(--spacing-md) !important;
}

/* DataTables & Tables */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    background-color: #F8FAFC;
}

.table td {
    padding: 0.5rem 0.75rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8125rem;
}

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

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

/* DataTables pagination and search customization */
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.25rem 1.5rem 0.25rem 0.5rem;
    font-size: 0.8125rem;
    background-color: #fff;
    outline: none;
    margin: 0 0.25rem;
}
.dataTables_wrapper .dataTables_length select:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 0.2rem var(--brand-primary-light);
}

.dataTables_wrapper .pagination .page-item.active .page-link {
    background-color: var(--brand-primary) !important;
    border-color: var(--brand-primary) !important;
    color: white !important;
    box-shadow: var(--shadow-sm);
}

.dataTables_wrapper .pagination .page-link {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    margin: 0 2px;
    border-radius: var(--border-radius-sm) !important;
    font-size: 0.8125rem;
    padding: 0.35rem 0.75rem;
}

.dataTables_wrapper .pagination .page-link:hover {
    background-color: var(--brand-primary-light);
    color: var(--brand-primary);
    border-color: var(--brand-primary-light);
}

.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.25rem 0.5rem;
    margin-left: 0.5rem;
    font-size: 0.8125rem;
    outline: none;
}

.dataTables_wrapper .dataTables_filter input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 0.2rem var(--brand-primary-light);
}

/* DataTables Processing Loader */
.dataTables_wrapper .dataTables_processing {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    z-index: 1050 !important;
    text-align: center !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Status Badges (Pills) */
.badge-status {
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

/* Stat Widgets */
.stat-widget {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: var(--spacing-lg);
}

.stat-icon.primary { background-color: var(--brand-primary-light); color: var(--brand-primary); }
.stat-icon.success { background-color: var(--color-success-bg); color: var(--color-success); }
.stat-icon.warning { background-color: var(--color-warning-bg); color: var(--color-warning); }
.stat-icon.danger { background-color: var(--color-danger-bg); color: var(--color-danger); }

.stat-details h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-details p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Mobile Responsiveness */
@media (max-width: 991.98px) {
    .navbar-toggler-btn {
        display: block;
    }
    
    .app-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    
    .app-sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1035;
        display: none;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
}

/* =========================================
   Select2 Custom Theming (SaaS style)
========================================= */
.select2-container--bootstrap-5 .select2-selection {
    min-height: calc(1.5em + 0.75rem + 2px);
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-family: var(--font-family-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
.select2-container--bootstrap-5.select2-container--focus .select2-selection,
.select2-container--bootstrap-5.select2-container--open .select2-selection {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 0.25rem rgba(13, 148, 136, 0.25);
}
.select2-container--bootstrap-5 .select2-dropdown {
    border-color: var(--brand-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}
.select2-container--bootstrap-5 .select2-results__option--highlighted[aria-selected] {
    background-color: var(--brand-primary);
    color: white;
}