:root {
  --ui-primary: #4f46e5;
  --ui-primary-hover: #4338ca;
  --ui-slate-50: #f8fafc;
  --ui-slate-100: #f1f5f9;
  --ui-slate-200: #e2e8f0;
  --ui-slate-500: #64748b;
  --ui-slate-700: #334155;
  --ui-slate-800: #1e293b;
  --ui-success: #10b981;
  --ui-danger: #ef4444;
  --ui-danger-bg: #fef2f2;
  --ui-radius-sm: 0.375rem;
  --ui-radius-md: 0.5rem;
  --ui-radius-lg: 0.75rem;
}

/* Common page/header shell */
.ui-header,
.custom-header {
  background: #fff;
  border: 1px solid var(--ui-slate-200);
  border-radius: var(--ui-radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.ui-title,
.page-title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin: 0;
  font-weight: 700;
  color: var(--ui-slate-800);
}

.ui-title i,
.page-title i {
  color: var(--ui-primary);
  background: var(--ui-slate-100);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.1rem;
}

.main-card {
  border: none;
  border-radius: var(--ui-radius-lg);
  background: #fff;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card-body {
  padding: 1.5rem;
}

/* Common table standards */
.ui-table,
.table {
  font-size: 0.8rem;
  color: var(--ui-slate-700);
}

.ui-table thead th,
.table thead th {
  background: var(--ui-slate-50);
  color: var(--ui-slate-700);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  border-top: none;
  border-bottom: 1px solid var(--ui-slate-200);
  vertical-align: middle;
}

.ui-table td,
.table td {
  vertical-align: middle;
  border-top: 1px solid var(--ui-slate-100);
}

/* Common button styles */
.ui-btn,
.btn {
  border-radius: var(--ui-radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
}

.ui-btn-primary,
.btn-indigo {
  background: var(--ui-primary);
  border-color: var(--ui-primary);
  color: #fff;
}

.ui-btn-primary:hover,
.btn-indigo:hover {
  background: var(--ui-primary-hover);
  border-color: var(--ui-primary-hover);
  color: #fff;
}

.ui-btn-light,
.btn-white {
  background: #fff;
  color: var(--ui-slate-700);
  border: 1px solid var(--ui-slate-200);
}

.ui-btn-light:hover,
.btn-white:hover {
  background: var(--ui-slate-50);
}

.ui-btn-xs,
.btn-xs {
  padding: 0.15rem 0.4rem;
  line-height: 1.4;
  font-size: 0.75rem;
  border-radius: 0.2rem;
}

/* Form caption and validation */
.form-caption {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: var(--ui-slate-500);
}

.form-error,
.invalid-feedback,
.text-danger {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ui-danger) !important;
}

.form-error {
  display: block;
  margin-top: 0.25rem;
}

.form-control.is-invalid,
.custom-select.is-invalid,
.select2-container--default .select2-selection--single.is-invalid {
  border-color: var(--ui-danger) !important;
  box-shadow: 0 0 0 0.18rem rgba(239, 68, 68, 0.15) !important;
  background-color: var(--ui-danger-bg);
}

.form-control.is-valid,
.custom-select.is-valid {
  border-color: var(--ui-success);
}

/* Horizontal scrolling for dense tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-responsive > .table,
.table-responsive > .ui-table,
.table-responsive > .mv-tbl,
.table-responsive > .history-table {
  margin-bottom: 0;
}

/* Responsive behavior for small screens */
@media (max-width: 991.98px) {
  .ui-header,
  .custom-header {
    padding: 0.875rem 1rem;
  }

  .ui-title,
  .page-title {
    font-size: 1rem;
    line-height: 1.3;
  }

  .ui-title i,
  .page-title i {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }

  .card-body {
    padding: 1rem;
  }

  .ui-table,
  .table {
    font-size: 0.76rem;
  }

  .ui-table thead th,
  .table thead th {
    font-size: 0.68rem;
    letter-spacing: 0.03em;
    padding: 0.5rem 0.45rem !important;
    white-space: nowrap;
  }

  .ui-table td,
  .table td {
    padding: 0.45rem 0.45rem !important;
  }
}

@media (max-width: 767.98px) {
  .ui-header,
  .custom-header {
    padding: 0.75rem 0.875rem;
    border-radius: var(--ui-radius-md);
  }

  .ui-title,
  .page-title {
    gap: 0.45rem;
    font-size: 0.95rem;
    flex-wrap: wrap;
  }

  .ui-title i,
  .page-title i {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    font-size: 0.85rem;
  }

  .main-card {
    border-radius: var(--ui-radius-md);
  }

  .card-body {
    padding: 0.75rem;
  }

  .ui-table,
  .table {
    font-size: 0.72rem;
  }

  .table-responsive > .table,
  .table-responsive > .ui-table {
    min-width: 640px;
  }

  .table-responsive > .mv-tbl,
  .table-responsive > .history-table {
    min-width: 560px;
  }

  .form-caption,
  .form-error,
  .invalid-feedback,
  .text-danger {
    font-size: 0.7rem;
  }
}