@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    height: 100%;
    top: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: block; }
  .sidebar-nav { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding-bottom: 24px; }
  .sidebar-nav .nav-item.logout { position: sticky; bottom: 0; background: var(--white); margin-top: 4px; border-top: 1px solid var(--gray-200); }
  .main-content {
    margin-left: 0;
    padding: 12px 14px;
    padding-bottom: 72px;
  }
  .page-header { flex-direction: column; align-items: flex-start; }
  .page-header h1 { font-size: 20px; }
  .page-header h1::before { top: 2px; bottom: 2px; }
  .page-header .page-actions { width: 100%; }
  .page-actions .btn { flex: 1; min-width: 0; justify-content: center; padding: 0 12px; }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .stat-card { padding: 14px; }
  .stat-card .stat-icon { width: 38px; height: 38px; font-size: 17px; margin-bottom: 10px; }
  .stat-card .stat-value { font-size: 22px; }
  .stat-card .stat-label { font-size: 12px; }
  .filter-bar {
    flex-direction: column;
    padding: 12px 14px;
  }
  .filter-bar .form-control { width: 100%; min-width: auto; }
  .filter-bar .btn { width: 100%; justify-content: center; }
  .search-box { max-width: none; width: 100%; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-row-3 { grid-template-columns: 1fr; gap: 0; }
  .charts-grid { grid-template-columns: 1fr; gap: 12px; }
  .chart-container { height: 220px; }
  table { font-size: 13px; }
  thead th, tbody td { padding: 8px 10px; }
  thead th { font-size: 11px; }
  .modal { max-width: 100%; margin: 10px; max-height: 90vh; border-radius: var(--radius-md); }
  .bottom-nav { display: flex !important; }
  .fab { display: flex; bottom: 72px; width: 50px; height: 50px; font-size: 24px; }
  .card-body { padding: 14px; }
  .card-header { padding: 12px 14px; font-size: 14px; }
  .btn { height: 44px; min-height: 44px; font-size: 15px; }
  .btn-sm { height: 36px; min-height: 36px; font-size: 13px; padding: 0 10px; }
  .login-card { padding: 24px 20px; box-shadow: none; border-radius: var(--radius-lg); }
  .login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 12px;
    align-items: flex-start;
    padding-top: 40px;
  }
  .login-page::before { display: none; }
  .pagination { flex-wrap: wrap; gap: 3px; }
  .pagination a, .pagination span { padding: 8px 12px; font-size: 12px; min-height: 36px; }
  .toast { min-width: auto; max-width: calc(100vw - 32px); }
  .toast-container { right: 12px; left: 12px; top: 12px; }
  .welcome-banner { padding: 20px; border-radius: var(--radius-md); }
  .welcome-banner h2 { font-size: 18px; }
  .info-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  input, select, textarea { font-size: 16px !important; }
}
@media (max-width: 400px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .page-actions { width: 100%; }
  .page-actions .btn { flex: 1; justify-content: center; font-size: 13px; padding: 0 8px; }
  .stat-card { padding: 10px; }
  .stat-card .stat-icon { width: 32px; height: 32px; font-size: 15px; margin-bottom: 8px; }
  .stat-card .stat-value { font-size: 18px; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .page-header h1 { font-size: 18px; }
  .login-card { padding: 20px 16px; }
  .login-card .login-logo h1 { font-size: 20px; }
}

.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  z-index: 1000;
  padding: 4px 0;
  padding-bottom: env(safe-area-inset-bottom, 4px);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.06);
}
.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 4px 0;
  flex: 1;
  color: var(--gray-500);
  font-size: 10px;
  transition: var(--transition);
  min-height: 48px;
  cursor: pointer;
  text-decoration: none;
}
.bottom-nav-item.active { color: var(--primary); }
.bottom-nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 24px;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 0 0 2px 2px;
  transition: var(--transition);
}
.bottom-nav-item.active::before { transform: translateX(-50%) scaleX(1); }
.bottom-nav-item:hover { color: var(--primary); }
.bottom-nav-icon { font-size: 22px; line-height: 1; display: block; }
.bottom-nav-label { font-weight: 600; font-size: 10px; line-height: 1.2; }

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--gray-700);
  cursor: pointer;
  padding: 4px;
  transition: var(--transition);
}
.hamburger:hover { color: var(--primary); }
@media (max-width: 768px) {
  .hamburger { display: inline-flex; margin-bottom: 8px; }
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 999;
  backdrop-filter: blur(2px);
}
.sidebar-overlay.active { display: block; }

@media (max-width: 768px) {
  .table-container { margin: 0 -14px; padding: 0 14px; overflow-x: hidden; border: none; }
  .table-container table { width: 100%; }
  .table-container thead { display: none; }
  .table-container tbody tr {
    display: block;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 10px;
  }
  .table-container tbody tr:active { transform: scale(0.98); }
  .table-container tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
    font-size: 13px;
    border: none;
    text-align: right;
  }
  .table-container tbody td:before {
    content: attr(data-label);
    font-weight: 500;
    color: var(--gray-500);
    text-align: left;
  }
  .table-container tbody td:empty:before { content: none; }
  .responsive-card-list { display: block; }
  .responsive-card-list table,
  .responsive-card-list thead,
  .responsive-card-list tbody,
  .responsive-card-list th,
  .responsive-card-list td,
  .responsive-card-list tr { display: none; }
  .mobile-card-item {
    display: block;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 10px;
    transition: var(--transition);
  }
  .mobile-card-item:active { transform: scale(0.98); }
  .mobile-card-item .mci-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 13px;
  }
  .mobile-card-item .mci-label { color: var(--gray-500); }
  .mobile-card-item .mci-value { font-weight: 600; text-align: right; }
}

@media (hover: none) and (pointer: coarse) {
  .btn, .nav-item, .bottom-nav-item, .pagination a {
    cursor: default;
    -webkit-tap-highlight-color: transparent;
  }
  input, select, textarea { font-size: 16px !important; }
  .btn:active { transform: scale(0.96); }
  .stat-card:hover { transform: none; box-shadow: var(--shadow-sm); }
  .stat-card:hover .stat-icon { transform: none; }
}