/**
 * Snout & About Pet Care - Form Components
 * Version: 1.0.0
 *
 * Form component system with consistent inputs, labels, and validation.
 * All form elements use design tokens for consistency.
 */

/* ============================================
   FORM GROUPS
   ============================================ */

.form-group {
  margin-bottom: var(--space-6);
}

.form-group-compact {
  margin-bottom: var(--space-4);
}

.form-group-spacious {
  margin-bottom: var(--space-8);
}

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

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

.form-label-required::after {
  content: ' *';
  color: var(--color-error);
}

/* Large label */
.form-label-lg {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
}

/* Inline label */
.form-label-inline {
  display: inline-block;
  margin-right: var(--space-4);
}

/* ============================================
   FORM CONTROLS (Inputs, Textareas, Selects)
   ============================================ */

.form-control,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  background-clip: padding-box;
  border: 2px solid var(--color-neutral);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  appearance: none;
}

/* Focus State */
.form-control:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
  background-color: var(--color-surface);
}

/* Disabled State */
.form-control:disabled,
.form-select:disabled,
.form-textarea:disabled,
.form-control.disabled,
.form-select.disabled,
.form-textarea.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: var(--color-background);
  border-color: var(--color-neutral);
}

/* Readonly State */
.form-control:read-only,
.form-textarea:read-only {
  background-color: var(--color-background);
  cursor: default;
}

/* ============================================
   INPUT SIZES
   ============================================ */

.form-control-sm,
.form-select-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

.form-control-lg,
.form-select-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
}

/* ============================================
   VALIDATION STATES
   ============================================ */

/* Success State */
.form-control-success,
.form-select-success {
  border-color: var(--color-success);
}

.form-control-success:focus,
.form-select-success:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.25);
}

/* Warning State */
.form-control-warning,
.form-select-warning {
  border-color: var(--color-warning);
}

.form-control-warning:focus,
.form-select-warning:focus {
  border-color: var(--color-warning);
  box-shadow: 0 0 0 3px rgba(249, 168, 37, 0.25);
}

/* Error State */
.form-control-error,
.form-select-error {
  border-color: var(--color-error);
}

.form-control-error:focus,
.form-select-error:focus {
  border-color: var(--color-error);
  box-shadow: var(--shadow-focus-error);
}

/* ============================================
   FORM FEEDBACK (Helper Text & Errors)
   ============================================ */

.form-helper,
.form-text {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.form-error,
.invalid-feedback {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error);
  line-height: var(--leading-normal);
}

.form-success,
.valid-feedback {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-success);
  line-height: var(--leading-normal);
}

/* Show feedback only when validation class is present */
.invalid-feedback {
  display: none;
}

.form-control-error ~ .invalid-feedback,
.is-invalid ~ .invalid-feedback {
  display: block;
}

.valid-feedback {
  display: none;
}

.form-control-success ~ .valid-feedback,
.is-valid ~ .valid-feedback {
  display: block;
}

/* ============================================
   FORM SELECTS
   ============================================ */

.form-select {
  padding-right: var(--space-10);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23316563' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  background-size: 16px 12px;
}

/* ============================================
   CHECKBOXES & RADIOS
   ============================================ */

.form-check {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-3);
  min-height: 24px;
}

.form-check-input {
  width: 20px;
  height: 20px;
  margin-right: var(--space-2);
  background-color: var(--color-surface);
  border: 2px solid var(--color-neutral);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

/* Radio buttons are circular */
.form-check-input[type="radio"] {
  border-radius: var(--radius-full);
}

/* Checked State */
.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Focus State */
.form-check-input:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* Disabled State */
.form-check-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-check-label {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  cursor: pointer;
  user-select: none;
}

.form-check-input:disabled ~ .form-check-label {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Inline Checkboxes */
.form-check-inline {
  display: inline-flex;
  align-items: center;
  margin-right: var(--space-6);
  margin-bottom: 0;
}

/* ============================================
   SWITCH (Toggle)
   ============================================ */

.form-switch {
  display: flex;
  align-items: center;
}

.form-switch .form-check-input {
  width: 44px;
  height: 24px;
  background-color: var(--color-neutral);
  border: none;
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: var(--transition-base);
}

.form-switch .form-check-input::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: var(--color-surface);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.form-switch .form-check-input:checked {
  background-color: var(--color-primary);
}

.form-switch .form-check-input:checked::after {
  transform: translateX(20px);
}

/* ============================================
   INPUT GROUPS (Icons, Buttons, Text)
   ============================================ */

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

.input-group .form-control,
.input-group .form-select {
  flex: 1 1 auto;
  width: 1%;
  min-width: 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
  text-align: center;
  white-space: nowrap;
  background-color: var(--color-background);
  border: 2px solid var(--color-neutral);
}

/* Remove border radius for connected elements */
.input-group > :not(:first-child) {
  margin-left: -2px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.input-group > :not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

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

.form-file-input {
  padding: var(--space-3) var(--space-4);
}

.form-file-input::file-selector-button {
  padding: var(--space-2) var(--space-4);
  margin-right: var(--space-4);
  background-color: var(--color-background);
  border: 2px solid var(--color-neutral);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.form-file-input::file-selector-button:hover {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary);
}

/* ============================================
   RANGE INPUT
   ============================================ */

.form-range {
  width: 100%;
  height: 24px;
  padding: 0;
  background-color: transparent;
  appearance: none;
}

.form-range::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  appearance: none;
}

.form-range::-webkit-slider-runnable-track {
  width: 100%;
  height: 8px;
  background-color: var(--color-neutral);
  border-radius: var(--radius-full);
}

.form-range:focus::-webkit-slider-thumb {
  box-shadow: var(--shadow-focus);
}

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

.form-floating {
  position: relative;
}

.form-floating > .form-control,
.form-floating > .form-select {
  height: calc(3.5rem + 2px);
  padding: var(--space-4);
}

.form-floating > label {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  padding: var(--space-4);
  pointer-events: none;
  border: 2px solid transparent;
  transform-origin: 0 0;
  transition: opacity 0.1s ease-in-out, transform 0.1s ease-in-out;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
  opacity: 0.65;
  transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

/* ============================================
   FORM LAYOUT
   ============================================ */

/* Inline Form */
.form-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.form-inline .form-group {
  margin-bottom: 0;
}

/* Form Row */
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.form-row > .form-group {
  flex: 1 1 0;
  min-width: 0;
}

/* ============================================
   RESPONSIVE FORMS
   ============================================ */

@media (max-width: 767.98px) {
  /* Stack form rows vertically on mobile */
  .form-row {
    flex-direction: column;
  }

  .form-row > .form-group {
    width: 100%;
  }

  /* Make inputs more touch-friendly */
  .form-control,
  .form-select,
  .form-textarea {
    padding: var(--space-4);
    font-size: 16px; /* Prevents zoom on iOS */
  }

  .form-check-input {
    width: 24px;
    height: 24px;
  }

  .form-switch .form-check-input {
    width: 48px;
    height: 28px;
  }

  .form-switch .form-check-input::after {
    width: 24px;
    height: 24px;
  }

  .form-switch .form-check-input:checked::after {
    transform: translateX(20px);
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Ensure labels are associated with inputs */
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .form-control,
  .form-select,
  .form-textarea {
    border-width: 2px;
  }

  .form-check-input {
    border-width: 3px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .form-control,
  .form-select,
  .form-textarea,
  .form-check-input,
  .form-switch .form-check-input,
  .form-switch .form-check-input::after {
    transition: none;
  }
}

/* ============================================
   FORM VALIDATION (Bootstrap Compatible)
   ============================================ */

.was-validated .form-control:valid,
.form-control.is-valid {
  border-color: var(--color-success);
}

.was-validated .form-control:valid:focus,
.form-control.is-valid:focus {
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.25);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
  border-color: var(--color-error);
}

.was-validated .form-control:invalid:focus,
.form-control.is-invalid:focus {
  box-shadow: var(--shadow-focus-error);
}