/* ==========================================================================
   FORMS — Formulaires, champs customs, steps, validation, toasts
   Convention BEM
   ========================================================================== */

/* ---------- Base ---------- */
.form {
  width: 100%;
}

.form__step {
  display: none;
}

.form__step--active {
  display: block;
}

/* Si pas de steps, tout est visible */
.form:not(:has(.form__step)) > .form__field {
  display: block;
}

.form__field {
  margin-bottom: var(--space-5);
  position: relative;
}

.form__field--hidden {
  display: none !important;
}

.form__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.form__label-hint {
  font-weight: var(--font-weight-normal);
  color: var(--color-text-light);
  font-size: var(--text-xs);
  margin-left: var(--space-1);
}

/* ---------- Native Inputs ---------- */
.form__input,
.form__textarea {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.form__textarea {
  min-height: 100px;
  resize: vertical;
}

/* ---------- Validation ---------- */
.form__field--error .form__input,
.form__field--error .form__textarea,
.form__field--error .form__select,
.form__field--error .form__radio-group,
.form__field--error .form__checkbox-group {
  border-color: var(--color-danger);
}

.form__field--error .form__input:focus,
.form__field--error .form__textarea:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form__error {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
}

/* ---------- Custom Select ---------- */
.form__select {
  position: relative;
  width: 100%;
  user-select: none;
}

.form__select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-light);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.form__select-trigger--filled {
  color: var(--color-text);
}

.form__select-trigger::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-text-light);
  border-bottom: 2px solid var(--color-text-light);
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-3);
}

.form__select--open .form__select-trigger::after {
  transform: rotate(-135deg);
}

.form__select--open .form__select-trigger {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.form__select-options {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 100;
  max-height: 240px;
  overflow-y: auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.form__select--open .form__select-options {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.form__select-option {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.form__select-option:hover {
  background-color: var(--color-bg-alt);
}

.form__select-option--active {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.form__select-option--active:hover {
  background-color: var(--color-primary-dark);
}

/* ---------- Custom Number ---------- */
.form__number {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.form__number-minus,
.form__number-plus {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: var(--text-lg);
  color: var(--color-text-light);
  background: var(--color-bg-alt);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  border: none;
}

.form__number-minus:hover,
.form__number-plus:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.form__number-input {
  width: 60px;
  text-align: center;
  border: none;
  outline: none;
  font-size: var(--text-base);
  padding: var(--space-2);
  background: var(--color-bg);
  color: var(--color-text);
  -moz-appearance: textfield;
}

.form__number-input::-webkit-outer-spin-button,
.form__number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ---------- Custom Multi Select ---------- */
.form__multiselect {
  position: relative;
  width: 100%;
  user-select: none;
}

.form__multiselect-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-light);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.form__multiselect-trigger--filled {
  color: var(--color-text);
}

.form__multiselect-trigger::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-text-light);
  border-bottom: 2px solid var(--color-text-light);
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-3);
}

.form__multiselect--open .form__multiselect-trigger::after {
  transform: rotate(-135deg);
}

.form__multiselect--open .form__multiselect-trigger {
  border-color: var(--color-primary);
}

.form__multiselect-options {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 100;
  max-height: 240px;
  overflow-y: auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.form__multiselect--open .form__multiselect-options {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.form__multiselect-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.form__multiselect-option::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.form__multiselect-option--active::before {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  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 d='M3 6l2 2 4-4' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.form__multiselect-option:hover {
  background-color: var(--color-bg-alt);
}

/* ---------- Custom Radio Group ---------- */
.form__radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.form__radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

.form__radio-option::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border-dark);
  border-radius: var(--radius-full);
  flex-shrink: 0;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__radio-option:hover {
  border-color: var(--color-primary);
}

.form__radio-option--active {
  border-color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 5%, transparent);
}

.form__radio-option--active::before {
  border-color: var(--color-primary);
  box-shadow: inset 0 0 0 4px var(--color-primary);
}

/* ---------- Custom Checkbox Group ---------- */
.form__checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.form__checkbox-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  user-select: none;
}

.form__checkbox-option::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.form__checkbox-option:hover {
  border-color: var(--color-primary);
}

.form__checkbox-option--active {
  border-color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 5%, transparent);
}

.form__checkbox-option--active::before {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  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 d='M3 6l2 2 4-4' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ---------- Steps Navigation ---------- */
.form__nav {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.form__prev,
.form__next,
.form__submit {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.form__prev {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

.form__prev:hover {
  background-color: var(--color-border);
}

.form__next {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.form__next:hover {
  background-color: var(--color-primary-dark);
}

.form__submit {
  background-color: var(--color-success);
  color: var(--color-text-inverse);
}

.form__submit:hover {
  filter: brightness(0.9);
}

.form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- Progress Bar ---------- */
.form__progress {
  height: 4px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.form__progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
  width: 0%;
}

/* ---------- Step Indicators ---------- */
.form__step-indicators {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
}

.form__step-indicator {
  flex: 1;
  text-align: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  border-bottom: 3px solid var(--color-border);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.form__step-indicator--active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.form__step-indicator--done {
  color: var(--color-success);
  border-color: var(--color-success);
}

/* ---------- Toast Notifications ---------- */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--color-text-light);
  pointer-events: auto;
  transform: translateX(120%);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
  max-width: 400px;
}

.toast--visible {
  transform: translateX(0);
  opacity: 1;
}

.toast--success {
  border-left-color: var(--color-success);
}

.toast--success .toast__icon {
  color: var(--color-success);
}

.toast--error {
  border-left-color: var(--color-danger);
}

.toast--error .toast__icon {
  color: var(--color-danger);
}

.toast--warning {
  border-left-color: var(--color-warning);
}

.toast--warning .toast__icon {
  color: var(--color-warning);
}

.toast--info {
  border-left-color: var(--color-primary);
}

.toast--info .toast__icon {
  color: var(--color-primary);
}

.toast__icon {
  flex-shrink: 0;
  display: flex;
}

.toast__message {
  font-size: var(--text-sm);
  color: var(--color-text);
  flex: 1;
}

.toast__close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: var(--color-text-light);
  cursor: pointer;
  font-size: var(--text-lg);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.toast__close:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    top: var(--space-4);
  }

  .toast {
    max-width: 100%;
  }

  .form__radio-group,
  .form__checkbox-group {
    flex-direction: column;
  }
}