/* ==========================================================================
   COMPONENTS CSS - APP SHELL, MODALS, TOASTS, STATS, LAYOUT
   ========================================================================== */

/* ==========================================================================
   APP SHELL
   ========================================================================== */

.app-wrapper {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: #ffffff;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-brand {
  height: var(--header-height);
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.sidebar-menu {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.menu-section-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-light);
  letter-spacing: 0.08em;
  padding: var(--space-3) var(--space-3) var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.7rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.nav-link i {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
}

.nav-link:hover {
  background-color: var(--bg-surface-secondary);
  color: var(--primary);
}

.nav-link.active {
  background: linear-gradient(135deg, var(--primary-light) 0%, #ede9fe 100%);
  color: var(--primary);
}

.sidebar-user {
  padding: var(--space-4);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background-color: #fafafa;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: capitalize;
}

/* Main Content Area */
.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

/* Header */
.app-header {
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 90;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.page-title-wrap h1 {
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.page-title-wrap .page-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Content Container */
.app-content {
  flex: 1;
  padding: var(--space-6);
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* Mobile Sidebar Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  z-index: 95;
  transition: opacity var(--transition-normal);
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  z-index: 90;
  justify-content: space-around;
  align-items: center;
  padding: 0 var(--space-2);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  flex: 1;
  gap: 3px;
  transition: all var(--transition-fast);
}

.mobile-nav-item i {
  font-size: 1.25rem;
}

.mobile-nav-item.active {
  color: var(--primary);
}

/* ==========================================================================
   STAT CARDS
   ========================================================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--card-accent, var(--primary));
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.stat-icon.primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.stat-icon.secondary {
  background-color: var(--secondary-light);
  color: var(--secondary);
}

.stat-icon.success {
  background-color: var(--success-light);
  color: var(--success);
}

.stat-icon.warning {
  background-color: var(--warning-light);
  color: var(--warning);
}

.stat-details {
  flex: 1;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 2px;
}

.stat-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   MODALS
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-normal);
}

.modal-dialog.modal-lg {
  max-width: 800px;
}

.modal-backdrop.show .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-main);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--bg-surface-secondary);
  color: var(--text-main);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-color);
  background-color: #fafafa;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ==========================================================================
   TOAST NOTIFICATIONS
   ========================================================================== */

.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
  max-width: 380px;
  width: calc(100% - 2 * var(--space-6));
}

.toast {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  pointer-events: auto;
  animation: toastSlideIn 0.3s ease-out forwards;
  position: relative;
  overflow: hidden;
}

.toast::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--toast-color, var(--primary));
}

.toast-success { --toast-color: var(--success); }
.toast-error { --toast-color: var(--danger); }
.toast-warning { --toast-color: var(--warning); }
.toast-info { --toast-color: var(--info); }

.toast-icon {
  font-size: 1.15rem;
  color: var(--toast-color);
  margin-top: 2px;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.toast-message {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.toast-close {
  color: var(--text-light);
  font-size: 0.9rem;
  padding: 2px;
}

.toast-close:hover {
  color: var(--text-main);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ==========================================================================
   LOADING & EMPTY STATES
   ========================================================================== */

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-4);
  gap: var(--space-3);
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 18px;
  height: 18px;
  border-width: 2px;
}

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

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-4);
  text-align: center;
  background-color: #ffffff;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  background-color: var(--bg-surface-secondary);
  color: var(--text-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--space-3);
}

.empty-state-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: var(--space-1);
}

.empty-state-desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  max-width: 360px;
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   FILE DROPZONE (EXCEL IMPORT)
   ========================================================================== */

.dropzone {
  border: 2px dashed var(--primary);
  background-color: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-4);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.dropzone:hover, .dropzone.dragover {
  background-color: #e0e7ff;
  border-color: var(--primary-hover);
  transform: scale(1.01);
}

.dropzone-icon {
  font-size: 2.5rem;
  color: var(--primary);
}

.dropzone-text {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-main);
}

.dropzone-hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}