/**
 * UNIFIED FILTER SYSTEM — Enterprise Consistency
 * TecnoImpianti PRO. All filter/search sections identical.
 *
 * Structure: [ Search ] [ Optional Selects ] [ Primary Button ] [ Reset ]
 * All elements: 44px height, same radius, border, focus ring, spacing.
 * NO backend changes.
 */

/* ============================================
   FILTER BAR CONTAINER
   ============================================ */
.uf-filter-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--ds-space-2, 16px) var(--ds-space-3, 20px);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  margin-bottom: var(--ds-space-3, 24px);
}

.uf-filter-header {
  margin-bottom: var(--ds-space-2, 12px);
  padding-bottom: var(--ds-space-2, 12px);
  border-bottom: 1px solid var(--border-subtle);
}

.uf-filter-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.uf-filter-subtitle {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ============================================
   FILTER ROW — Flex layout
   ============================================ */
.uf-filter-row {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2, 12px);
  flex-wrap: wrap;
}

/* ============================================
   SEARCH INPUT — 44px, icon left
   ============================================ */
.uf-search {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 200px;
  max-width: 320px;
}

.uf-search i {
  position: absolute;
  left: 14px;
  color: var(--text-soft);
  font-size: 14px;
  pointer-events: none;
}

.uf-search input {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 40px;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.uf-search input::placeholder {
  color: var(--text-soft);
}

.uf-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

/* ============================================
   SELECT — 44px, same as input
   ============================================ */
.uf-select {
  height: 44px;
  min-width: 140px;
  max-width: 200px;
  padding: 0 36px 0 14px;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  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='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.uf-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

/* Form group wrapper for labeled selects */
.uf-filter-row .form-group {
  margin: 0;
  flex: 0 0 auto;
}

.uf-filter-row .form-group label {
  display: block;
  margin-bottom: 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.uf-filter-row .form-group .form-control,
.uf-filter-row .form-group select {
  height: 44px !important;
  min-width: 140px;
  padding: 0 36px 0 14px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.uf-filter-row .form-group input.form-control {
  padding: 0 14px !important;
  min-width: 120px;
}

.uf-filter-row .form-group input[type="date"].form-control {
  padding: 0 14px !important;
}

/* Checkbox in filter row - align with 44px inputs */
.uf-filter-row .uf-filter-checkbox {
  display: flex;
  align-items: center;
  margin: 0;
}

.uf-filter-row .uf-checkbox-label {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
}

/* ============================================
   PRIMARY BUTTON — 44px, solid brand
   ============================================ */
.uf-btn-primary {
  height: 44px;
  padding: 0 var(--ds-space-3, 20px);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ============================================
   RESET — Subtle text link
   ============================================ */
.uf-reset {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0 var(--ds-space-1);
  transition: color 150ms ease;
}

.uf-reset:hover {
  color: var(--primary);
}

/* Actions group: button + reset, right aligned */
.uf-filter-actions {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2, 12px);
  margin-left: auto;
}

/* ============================================
   FILTER TABS — Preventivi/Lavori (no pills)
   Same height, segmented control feel
   ============================================ */
.uf-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.uf-filter-tabs a {
  height: 44px;
  padding: 0 var(--ds-space-3, 20px);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-muted);
  background: var(--surface);
  border-right: 1px solid var(--border);
  transition: background 150ms ease, color 150ms ease;
}

.uf-filter-tabs a:last-child {
  border-right: none;
}

.uf-filter-tabs a:hover {
  background: var(--surface-2);
  color: var(--text);
}

.uf-filter-tabs a.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.uf-filter-tabs a.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
}

/* ============================================
   EMPTY STATE — Unified
   ============================================ */
.uf-empty-state {
  text-align: center;
  padding: var(--ds-space-6, 40px) var(--ds-space-4, 32px);
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}

.uf-empty-state .uf-empty-icon {
  font-size: 40px;
  color: var(--text-soft);
  opacity: 0.7;
  margin-bottom: var(--ds-space-2, 16px);
  display: block;
}

.uf-empty-state .uf-empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--ds-space-1, 8px);
}

.uf-empty-state .uf-empty-description {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0 0 var(--ds-space-3, 20px);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.uf-empty-state .btn {
  height: 44px;
  padding: 0 var(--ds-space-4, 28px);
  font-size: 14px;
  font-weight: 600;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .uf-filter-row {
    flex-direction: column;
    align-items: stretch;
  }

  .uf-search {
    max-width: none;
  }

  .uf-filter-actions {
    margin-left: 0;
    justify-content: flex-end;
  }

  .uf-filter-tabs {
    flex-wrap: wrap;
  }

  .uf-filter-tabs a {
    flex: 1;
    min-width: 80px;
  }
}