* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: 0.925rem;
  color: var(--text-main);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

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

/* SIDEBAR */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform 0.2s ease;
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: #94a3b8;
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0.75rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
  padding: 0 0.5rem;
  margin-bottom: 0.35rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.nav-item:hover {
  color: var(--sidebar-text-hover);
  background-color: rgba(255, 255, 255, 0.06);
}

.nav-item.active {
  color: #ffffff;
  background-color: var(--sidebar-active-bg);
  border-left: 3px solid var(--sidebar-active-border);
}

.nav-icon {
  font-size: 1.1rem;
  width: 20px;
  display: flex;
  justify-content: center;
}

/* MAIN CONTENT AREA */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* TOPBAR */
.topbar {
  height: var(--header-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 90;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.business-switcher-wrapper {
  position: relative;
}

.business-switcher-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-surface-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.15s ease;
}

.business-switcher-btn:hover {
  border-color: var(--border-strong);
}

.business-switcher-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.35rem;
  width: 260px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 1000;
}

.business-switcher-dropdown.show {
  display: flex;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-main);
  transition: background-color 0.15s ease;
}

.dropdown-item:hover {
  background-color: var(--bg-surface-hover);
}

.dropdown-item.active {
  background-color: var(--primary-subtle);
  color: var(--primary);
  font-weight: 600;
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-subtle);
  margin: 0.25rem 0;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface-hover);
  color: var(--text-muted);
  font-size: 1rem;
  transition: all 0.15s ease;
}

.icon-btn:hover {
  color: var(--text-main);
  background-color: var(--border-subtle);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-left: 0.5rem;
  border-left: 1px solid var(--border-subtle);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.2;
}

.user-role-badge {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* PAGE CONTENT */
.page-content {
  flex: 1;
  padding: 1.75rem;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.btn-secondary {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

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

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

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
}

/* CARDS & STATS GRID */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.stat-title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.stat-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.stat-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* GENERAL CARD */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.card-body {
  padding: 1.25rem;
}

/* DATA TABLE */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  max-width: 300px;
  width: 100%;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  background-color: var(--bg-surface-hover);
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
}

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

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  text-transform: capitalize;
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-warning {
  background-color: var(--warning-bg);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

.badge-danger {
  background-color: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

.badge-info {
  background-color: var(--info-bg);
  color: var(--info);
  border: 1px solid var(--info-border);
}

/* MODALS */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 1rem;
}

.modal-overlay.show {
  display: flex;
}

.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalFadeIn 0.15s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  background-color: var(--bg-surface-hover);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row > * {
  flex: 1;
}

/* TOASTS */
.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 400px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  animation: toastSlideIn 0.2s ease-out;
}

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

.toast.toast-success { border-left: 4px solid var(--success); }
.toast.toast-error { border-left: 4px solid var(--danger); }
.toast.toast-info { border-left: 4px solid var(--info); }

.responsive-grid-2col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.chart-container-card {
  height: 320px;
  position: relative;
}

@media (max-width: 640px) {
  .responsive-grid-2col {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
  }

  .chart-container-card {
    height: 250px;
  }
}

.mobile-sidebar-close {
  display: none;
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  z-index: 99;
  display: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.sidebar-backdrop.show {
  display: block;
  opacity: 1;
}

/* ================= RESPONSIVE SYSTEM ================= */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-menu-toggle {
    display: flex !important;
  }
  .mobile-sidebar-close {
    display: flex !important;
  }
}

@media (max-width: 640px) {
  /* Prevent automatic iOS input zoom */
  input, select, textarea {
    font-size: 16px !important;
  }

  .topbar {
    height: 56px;
    padding: 0 0.75rem;
  }

  .topbar-left {
    gap: 0.5rem;
  }

  .topbar-right {
    gap: 0.4rem;
  }

  .business-switcher-btn {
    padding: 0.35rem 0.5rem;
    font-size: 0.8rem;
    max-width: 140px;
  }

  #active-business-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 90px;
  }

  .business-switcher-dropdown {
    left: -10px;
    width: calc(100vw - 1.5rem);
    max-width: 300px;
  }

  .user-info {
    display: none;
  }

  .user-profile {
    padding-left: 0.25rem;
    gap: 0.35rem;
  }

  #btn-quick-checkin {
    padding: 0.35rem 0.5rem;
    font-size: 0.75rem;
  }

  .page-content {
    padding: 1rem 0.75rem;
  }

  .page-header {
    margin-bottom: 1rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .page-title {
    font-size: 1.3rem;
  }

  .page-subtitle {
    font-size: 0.8rem;
  }

  .grid-cards {
    grid-template-columns: 1fr;
    gap: 0.85rem;
    margin-bottom: 1.25rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .card-header {
    padding: 0.85rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .card-body {
    padding: 1rem 0.85rem;
  }

  .form-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }

  .table-toolbar > div {
    width: 100%;
  }

  .table-toolbar select,
  .table-toolbar input {
    width: 100% !important;
  }

  .search-input-wrap {
    max-width: 100%;
  }

  .table-responsive {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    -webkit-overflow-scrolling: touch;
  }

  .data-table th, .data-table td {
    padding: 0.6rem 0.65rem;
    font-size: 0.8rem;
  }

  /* Mobile Bottom-Sheet Modal */
  .modal-overlay {
    padding: 0;
    align-items: flex-end;
  }

  .modal-dialog {
    max-width: 100%;
    width: 100%;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 88vh;
    animation: modalSlideUp 0.2s ease-out;
  }

  @keyframes modalSlideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }

  .modal-header {
    padding: 1rem 1.15rem;
  }

  .modal-body {
    padding: 1rem 1.15rem;
    gap: 0.85rem;
  }

  .modal-footer {
    padding: 0.85rem 1.15rem;
  }

  /* Mobile Toast */
  .toast-container {
    top: 0.75rem;
    left: 0.75rem;
    right: 0.75rem;
  }

  .toast {
    min-width: unset;
    width: 100%;
    max-width: 100%;
    font-size: 0.82rem;
    padding: 0.75rem 0.85rem;
  }
}