/**
 * FORMS.CSS - Enterprise Form System
 * 
 * Stili professionali per form gestionali:
 * - Input, select, textarea coerenti
 * - Focus states chiari
 * - Error handling visibile
 * - Grid responsive device-based
 * - Touch-friendly mobile/tablet
 * 
 * ⚠️ Usa esclusivamente variabili CSS da base.css
 * ⚠️ NON contiene layout generale (quello è in layout.css)
 */

/* ============================================
   FORM CONTAINERS
   ============================================ */

form {
  width: 100%;
}

.form-row,
.field-row {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.form-group,
.field {
  margin-bottom: var(--space-5);
  flex: 1;
  min-width: 0;
}

.form-group.full,
.field.full {
  flex: 1 1 100%;
}

.form-group.inline-checkbox,
.field.inline-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

/* Form sections */
.form-section {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: var(--border-width) solid var(--color-border-subtle);
}

.form-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.form-section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0 0 var(--space-5) 0;
  line-height: var(--line-height-tight);
}

/* ============================================
   LABELS
   ============================================ */

.form-label,
.field-label,
label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.form-label.required::after,
.field-label.required::after,
label.required::after {
  content: " *";
  color: var(--color-danger);
  font-weight: var(--font-weight-semibold);
}

/* ============================================
   TEXT INPUTS
   ============================================ */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="search"],
input[type="tel"],
input[type="url"],
.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg-card);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-input);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast), background-color var(--transition-fast);
  box-sizing: border-box;
  font-family: var(--font-family-base);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="search"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background-color: var(--color-bg-card);
}

input[type="text"]:disabled,
input[type="email"]:disabled,
input[type="password"]:disabled,
input[type="number"]:disabled,
input[type="date"]:disabled,
input[type="time"]:disabled,
input[type="search"]:disabled,
.form-control:disabled {
  background-color: var(--color-bg-soft);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

input[type="text"]:read-only,
input[type="email"]:read-only,
input[type="password"]:read-only,
input[type="number"]:read-only,
.form-control[readonly] {
  background-color: var(--color-bg-soft);
  color: var(--color-text);
  cursor: default;
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
input[type="number"]::placeholder,
input[type="search"]::placeholder,
.form-control::placeholder {
  color: var(--color-text-soft);
  opacity: 1;
}

/* ============================================
   TEXTAREA
   ============================================ */

textarea,
textarea.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  background-color: var(--color-bg-card);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-input);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  resize: vertical;
  min-height: 100px;
  font-family: var(--font-family-base);
  box-sizing: border-box;
}

textarea:focus,
textarea.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background-color: var(--color-bg-card);
}

textarea:disabled,
textarea.form-control:disabled {
  background-color: var(--color-bg-soft);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

textarea::placeholder {
  color: var(--color-text-soft);
  opacity: 1;
}

/* ============================================
   NUMBER STEPPER
   ============================================ */

.number-stepper {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.number-stepper input[type="number"] {
  flex: 1;
}

.stepper-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--color-border-strong);
  background: var(--color-bg-card);
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.stepper-btn:hover {
  background: var(--color-bg-soft);
  border-color: var(--color-border-strong);
}

/* ============================================
   SELECT
   ============================================ */

select,
select.form-control,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-right: calc(var(--space-4) * 2 + 12px);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg-card);
  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='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  background-size: 12px;
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-input);
  appearance: none;
  cursor: pointer;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-sizing: border-box;
  font-family: var(--font-family-base);
}

select:focus,
select.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background-color: var(--color-bg-card);
}

select:disabled,
select.form-control:disabled,
.form-select:disabled {
  background-color: var(--color-bg-soft);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

/* ============================================
   CHECKBOX & RADIO
   ============================================ */

input[type="checkbox"],
input[type="radio"] {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

input[type="checkbox"] + label,
input[type="radio"] + label {
  margin-left: var(--space-2);
  font-weight: var(--font-weight-normal);
  cursor: pointer;
  user-select: none;
}

.checkbox-group,
.radio-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.checkbox-group label,
.radio-group label {
  margin: 0;
  cursor: pointer;
  font-weight: var(--font-weight-normal);
}

/* ============================================
   FILE INPUT
   ============================================ */

input[type="file"] {
  width: 100%;
  padding: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background-color: var(--color-bg-card);
  border: var(--border-width) dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast),
    background-color var(--transition-fast);
  box-sizing: border-box;
}

input[type="file"]:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

input[type="file"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

input[type="file"]:disabled {
  background-color: var(--color-bg-soft);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

/* ============================================
   HELP TEXT & HINTS
   ============================================ */

.form-help,
.help-text,
.help,
.hint {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

.form-help small,
.help-text small,
.help small,
.hint small {
  font-size: var(--font-size-xs);
}

/* ============================================
   ERRORS
   ============================================ */

.form-error,
.error-text,
.error,
.errors,
.error-message,
.field-errors {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  line-height: var(--line-height-normal);
}

.errorlist {
  list-style: none;
  padding: 0;
  margin: var(--space-2) 0 0 0;
}

.errorlist li {
  margin-bottom: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

.errorlist li:last-child {
  margin-bottom: 0;
}

.form-group .errorlist,
.field .errorlist {
  margin-top: var(--space-2);
}

/* Error states */
input.is-invalid,
textarea.is-invalid,
select.is-invalid,
.form-control.is-invalid,
input:invalid:not(:focus):not(:placeholder-shown),
textarea:invalid:not(:focus):not(:placeholder-shown),
select:invalid:not(:focus):not(:placeholder-shown) {
  border-color: var(--color-danger);
}

input.is-invalid:focus,
textarea.is-invalid:focus,
select.is-invalid:focus,
.form-control.is-invalid:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15);
}

/* Valid states */
input.is-valid,
textarea.is-valid,
select.is-valid,
.form-control.is-valid {
  border-color: var(--color-success);
}

input.is-valid:focus,
textarea.is-valid:focus,
select.is-valid:focus,
.form-control.is-valid:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15);
}

/* ============================================
   FORM GRID
   ============================================ */

.form-grid,
.form-grid-premium {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.form-grid .form-group,
.form-grid .field,
.form-grid-premium .form-group-premium {
  margin-bottom: 0;
}

.form-grid .form-group.full,
.form-grid .field.full,
.form-grid-premium .form-group-premium.full {
  grid-column: 1 / -1;
}

.form-grid.single {
  grid-template-columns: 1fr;
}

/* ============================================
   FORM ACTIONS
   ============================================ */

.form-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: var(--border-width) solid var(--color-border-subtle);
  flex-wrap: wrap;
}

.form-actions .btn {
  min-width: 120px;
}

/* ============================================
   INPUT GROUP (addon support)
   ============================================ */

.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.input-group input,
.input-group select,
.input-group textarea {
  flex: 1;
  border-radius: 0;
}

.input-group input:first-child,
.input-group select:first-child,
.input-group textarea:first-child {
  border-top-left-radius: var(--radius-input);
  border-bottom-left-radius: var(--radius-input);
}

.input-group input:last-child,
.input-group select:last-child,
.input-group textarea:last-child {
  border-top-right-radius: var(--radius-input);
  border-bottom-right-radius: var(--radius-input);
}

.input-group-addon {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background-color: var(--color-bg-soft);
  border: var(--border-width) solid var(--color-border-strong);
  white-space: nowrap;
}

.input-group-addon:first-child {
  border-right: none;
  border-top-left-radius: var(--radius-input);
  border-bottom-left-radius: var(--radius-input);
}

.input-group-addon:last-child {
  border-left: none;
  border-top-right-radius: var(--radius-input);
  border-bottom-right-radius: var(--radius-input);
}

/* ============================================
   RESPONSIVE (Device-based)
   ============================================ */

/* Tablet: Touch-friendly */
body.device-tablet input[type="text"],
body.device-tablet input[type="email"],
body.device-tablet input[type="password"],
body.device-tablet input[type="number"],
body.device-tablet input[type="date"],
body.device-tablet input[type="time"],
body.device-tablet input[type="search"],
body.device-tablet textarea,
body.device-tablet select,
body.device-tablet .form-control {
  padding: var(--space-3);
  font-size: var(--font-size-base);
  min-height: 44px;
}

body.device-tablet .form-grid,
body.device-tablet .form-grid-premium {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

/* Mobile: Touch-friendly */
body.device-mobile input[type="text"],
body.device-mobile input[type="email"],
body.device-mobile input[type="password"],
body.device-mobile input[type="number"],
body.device-mobile input[type="date"],
body.device-mobile input[type="time"],
body.device-mobile input[type="search"],
body.device-mobile textarea,
body.device-mobile select,
body.device-mobile .form-control {
  padding: var(--space-4);
  font-size: var(--font-size-base);
  min-height: 44px;
}

body.device-mobile .form-grid,
body.device-mobile .form-grid-premium {
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

body.device-mobile .form-actions {
  flex-direction: column;
}

body.device-mobile .form-actions .btn {
  width: 100%;
  min-width: auto;
}

/* Desktop: Always desktop, even if window is narrow */
body.device-desktop .form-grid {
  grid-template-columns: repeat(2, 1fr);
}

body.device-desktop .form-grid-premium {
  grid-template-columns: repeat(2, 1fr);
}

body.device-desktop input[type="text"],
body.device-desktop input[type="email"],
body.device-desktop input[type="password"],
body.device-desktop input[type="number"],
body.device-desktop textarea,
body.device-desktop select {
  font-size: var(--font-size-sm);
  padding: var(--space-3) var(--space-4);
}

/* Desktop: 3 colonne per form molto larghi */
body.device-desktop .form-grid.wide {
  grid-template-columns: repeat(3, 1fr);
}

/* Alias per form-mag-grid (magazzino) */
.form-mag-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.form-mag-grid > div {
  margin-bottom: 0;
}

.form-mag-grid > div.full {
  grid-column: 1 / -1;
}

body.device-tablet .form-mag-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

body.device-mobile .form-mag-grid {
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

body.device-desktop .form-mag-grid {
  grid-template-columns: repeat(2, 1fr);
}

/* ============================================
   COMPATIBILITY LAYER
   ============================================ */

/* Alias per classi legacy o specifiche template */
.field-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.field-label.required::after {
  content: " *";
  color: var(--color-danger);
  font-weight: var(--font-weight-semibold);
}

/* Login form specific (mantiene compatibilità) */
.login-card .form-group {
  margin-bottom: var(--space-5);
}

.login-card .form-group label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.login-card .form-group input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  box-sizing: border-box;
}

.login-card .form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.login-card .error-message {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  margin-top: var(--space-2);
  padding: var(--space-3);
  background-color: var(--color-danger-light);
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--color-danger);
}

.login-card .btn-login {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  margin-top: var(--space-3);
  transition: background-color var(--transition-fast);
}

.login-card .btn-login:hover {
  background-color: var(--color-primary-hover);
}

.login-card .btn-login:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   CHECKBOX GROUPS (MULTIPLE)
   ============================================ */

.form-checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.form-checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.form-checkbox-wrapper:hover {
  background: var(--color-bg-soft);
}

.form-checkbox-wrapper input[type="checkbox"] {
  margin: 0;
  margin-top: 2px;
  flex-shrink: 0;
}

.form-checkbox-label {
  display: flex;
  align-items: flex-start;
  cursor: pointer;
  flex: 1;
  margin: 0;
}

.form-checkbox-label-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-checkbox-label-text strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.form-section-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: var(--line-height-normal);
}