/* ============================================
   VisitaPro - Design System
   Corporate Visitor Management System
   ============================================ */

/* =====================
   CSS VARIABLES (TOKENS)
   ===================== */
:root {
  /* Primary Colors */
  --color-primary: #0088cc;
  --color-primary-dark: #006699;
  --color-primary-light: #33a3d9;

  /* Secondary Colors */
  --color-secondary: #2c3e50;
  --color-secondary-dark: #1a252f;
  --color-secondary-light: #3d566e;

  /* Accent Colors */
  --color-success: #27ae60;
  --color-success-light: #2ecc71;
  --color-warning: #f39c12;
  --color-warning-light: #f1c40f;
  --color-danger: #e74c3c;
  --color-danger-light: #ff6b6b;
  --color-info: #3498db;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f5;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #ced4da;
  --color-gray-500: #adb5bd;
  --color-gray-600: #6c757d;
  --color-gray-700: #495057;
  --color-gray-800: #343a40;
  --color-gray-900: #212529;
  --color-black: #000000;

  /* Background Colors */
  --bg-body: #f5f6fa;
  --bg-card: #ffffff;
  --bg-sidebar: #2c3e50;
  --bg-header: #3498db;

  /* Text Colors */
  --text-primary: #2c3e50;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --text-light: #ffffff;
  --text-link: #0088cc;

  /* Spacing Scale (4px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --sidebar-width: 250px;
  --header-height: 60px;
  --container-max-width: 1400px;
}

/* =====================
   RESET & BASE STYLES
   ===================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-body);
  min-height: 100vh;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* =====================
   LAYOUT COMPONENTS
   ===================== */

/* App Container */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-light);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-base);
}

.sidebar-header {
  padding: 0;
  background: #041527;
  text-align: center;
}

.sidebar-logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background-color: #041527;
  width: fit-content;
  margin: 0 auto;
}

.sidebar-logo-icon {
  font-size: var(--font-size-3xl);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md) 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  color: var(--color-gray-300);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  cursor: pointer;
  gap: var(--space-md);
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-light);
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-light);
  border-left-color: var(--color-primary);
}

.nav-item-icon {
  font-size: var(--font-size-lg);
  width: 24px;
  text-align: center;
}

.nav-item-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.nav-section-title {
  padding: var(--space-lg) var(--space-lg) var(--space-sm);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-gray-500);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  height: var(--header-height);
  background: var(--bg-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-md);
}

.header-title {
  color: var(--text-light);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--text-light);
}

.header-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.header-user-role {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.header-user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
}

/* Content Area */
.content {
  flex: 1;
  padding: var(--space-lg);
}

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* =====================
   CARDS & PANELS
   ===================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

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

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

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  color: var(--text-light);
}

.stat-icon.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.stat-icon.success {
  background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
}

.stat-icon.warning {
  background: linear-gradient(135deg, var(--color-warning), var(--color-warning-light));
}

.stat-icon.danger {
  background: linear-gradient(135deg, var(--color-danger), var(--color-danger-light));
}

.stat-icon.info {
  background: linear-gradient(135deg, var(--color-info), var(--color-primary-light));
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* =====================
   BUTTONS
   ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--text-light);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-gray-200);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-300);
}

.btn-success {
  background: var(--color-success);
  color: var(--text-light);
}

.btn-success:hover:not(:disabled) {
  background: #219a52;
}

.btn-danger {
  background: var(--color-danger);
  color: var(--text-light);
}

.btn-danger:hover:not(:disabled) {
  background: #c0392b;
}

.btn-warning {
  background: var(--color-warning);
  color: var(--text-light);
}

.btn-warning:hover:not(:disabled) {
  background: #d68910;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-gray-300);
  color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-gray-100);
}

.btn-icon {
  padding: var(--space-sm);
  min-width: 36px;
  min-height: 36px;
}

/* Button Group */
.btn-group {
  display: flex;
  gap: var(--space-sm);
}

/* =====================
   FORMS
   ===================== */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

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

.form-control {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.15);
}

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

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

.form-control.error:focus {
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-xs);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

/* Form Row */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}

.form-check-input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.form-check-label {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  cursor: pointer;
}

/* Select */
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-xl);
}

/* Search Input */
.search-input-wrapper {
  position: relative;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input-wrapper .form-control {
  padding-left: var(--space-2xl);
}

/* =====================
   TABLES
   ===================== */
.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-gray-200);
}

.table th {
  background: var(--color-gray-50);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

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

.table td {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

/* Table Actions */
.table-actions {
  display: flex;
  gap: var(--space-xs);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-success {
  background: rgba(39, 174, 96, 0.15);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(243, 156, 18, 0.15);
  color: var(--color-warning);
}

.badge-danger {
  background: rgba(231, 76, 60, 0.15);
  color: var(--color-danger);
}

.badge-info {
  background: rgba(52, 152, 219, 0.15);
  color: var(--color-info);
}

.badge-secondary {
  background: var(--color-gray-200);
  color: var(--text-secondary);
}

/* Custom Condition Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-en-curso {
  background: #dcf2e8;
  color: #0d8253;
}

.status-finalizado {
  background: #fcecd7;
  color: #d48b11;
}

.status-modificado {
  background: #e6f0f7;
  color: #387caf;
}

.status-anulado {
  background: #fae4e4;
  color: #fff;
}

/* Custom Badges for Tipo */
.badge-tipo {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.tipo-empleado {
  background: #eaedf1;
  color: #466b8c;
}

.tipo-visita {
  background: #def0fa;
  color: #2f96e2;
}

.tipo-propietario {
  background: #f3e8ff;
  color: #7e22ce;
}

.tipo-locador {
  background: #dcfce7;
  color: #166534;
}

/* Mark Exit Button (Teal - as in reference) */
.btn-mark-exit {
  background: #1abc9c;
  color: var(--text-light);
  font-size: var(--font-size-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.btn-mark-exit:hover {
  background: #16a085;
}

/* =====================
   PAGINATION
   ===================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md);
}

.pagination-info {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-right: auto;
}

.pagination-btn {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-gray-300);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

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

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

/* =====================
   FILTERS SECTION
   ===================== */
.filters-bar {
  display: flex;
  align-items: flex-end;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.filters-bar .form-group {
  margin-bottom: 0;
  min-width: 150px;
}

/* =====================
   TABS
   ===================== */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--space-lg);
}

.tab {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--color-primary);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* =====================
   MODAL
   ===================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-lg);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* =====================
   LOGIN PAGE
   ===================== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-lg);
}

.login-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
}

.login-header {
  background: var(--bg-header);
  padding: 0;
  text-align: center;
  vertical-align: middle;
  color: var(--text-light);
}

.login-logo {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xs);
}

.login-subtitle {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  text-align: center;
  vertical-align: middle;
  align-content: center;
}

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

.login-footer {
  padding: var(--space-md) var(--space-xl);
  background: var(--color-gray-50);
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

/* =====================
   CHARTS (CSS-based)
   ===================== */
.chart-container {
  padding: var(--space-md);
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  height: 200px;
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.bar-chart-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  max-width: 80px;
}

.bar-chart-bar {
  width: 100%;
  background: linear-gradient(to top, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  min-height: 10px;
  transition: height var(--transition-base);
}

.bar-chart-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--space-sm);
  text-align: center;
  word-break: break-word;
}

.bar-chart-value {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

/* =====================
   ALERTS
   ===================== */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.alert-success {
  background: rgba(39, 174, 96, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.alert-danger {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.alert-warning {
  background: rgba(243, 156, 18, 0.1);
  border: 1px solid var(--color-warning);
  color: var(--color-warning);
}

.alert-info {
  background: rgba(52, 152, 219, 0.1);
  border: 1px solid var(--color-info);
  color: var(--color-info);
}

/* =====================
   LOADING STATE
   ===================== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* =====================
   EMPTY STATE
   ===================== */
.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.empty-state-text {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
}

/* =====================
   RESPONSIVE DESIGN
   ===================== */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 220px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .header {
    padding: 0 var(--space-md);
  }

  .mobile-menu-btn {
    display: flex;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .filters-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: var(--font-size-xl);
  cursor: pointer;
}

/* =====================
   UTILITY CLASSES
   ===================== */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-left {
  text-align: left;
}

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

.text-success {
  color: var(--color-success);
}

.text-danger {
  color: var(--color-danger);
}

.text-warning {
  color: var(--color-warning);
}

.text-muted {
  color: var(--text-muted);
}

.fw-normal {
  font-weight: var(--font-weight-normal);
}

.fw-medium {
  font-weight: var(--font-weight-medium);
}

.fw-semibold {
  font-weight: var(--font-weight-semibold);
}

.fw-bold {
  font-weight: var(--font-weight-bold);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--space-sm);
}

.mt-2 {
  margin-top: var(--space-md);
}

.mt-3 {
  margin-top: var(--space-lg);
}

.mt-4 {
  margin-top: var(--space-xl);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--space-sm);
}

.mb-2 {
  margin-bottom: var(--space-md);
}

.mb-3 {
  margin-bottom: var(--space-lg);
}

.mb-4 {
  margin-bottom: var(--space-xl);
}

.d-none {
  display: none;
}

.d-flex {
  display: flex;
}

.d-block {
  display: block;
}

.flex-1 {
  flex: 1;
}

.gap-1 {
  gap: var(--space-sm);
}

.gap-2 {
  gap: var(--space-md);
}

.gap-3 {
  gap: var(--space-lg);
}

.w-100 {
  width: 100%;
}

.h-100 {
  height: 100%;
}

.filters-bar  {
      display:  flex;
      flex-wrap:  wrap;
      gap:  var(--space-md);
      align-items:  flex-end;
      padding:  var(--space-sm) 0;
    
}

    .filters-bar .form-group  {
      margin-bottom:  0;
      flex:  1;
      min-width:  140px;
   /* Prevent too narrow inputs */  
}

    /* Button container should not stretch indefinitely */  .filters-bar .form-group:last-child  {
      flex:  0 0 auto;
    
}

    /* Checkbox container */  .filters-bar .form-check-group  {
      display:  flex;
      align-items:  center;
      padding-bottom:  var(--space-sm);
   /* Align visually with inputs */  
}