/**
 * Forms Component Styles - Air Tasman Website
 * Shared form styles for consistent form elements across the site
 * @author Air Tasman Development Team
 * @version 1.0.0
 */

/* =============================================
   BASE FORM STYLES
   ============================================= */

.form {
  width: 100%;
  max-width: 100%;
}

.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group--inline {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

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

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-xs);
  line-height: var(--line-height-normal);
}

.form-label__required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-label--inline {
  margin-bottom: 0;
  margin-right: var(--space-sm);
}

/* =============================================
   FORM INPUTS
   ============================================= */

.form-input {
  width: 100%;
  height: var(--input-height);
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-system);
  line-height: 1;
  background: var(--color-white);
  color: var(--color-gray-800);
  transition: var(--transition-fast);
  transition-property: border-color, box-shadow, background-color;
}

.form-input::placeholder {
  color: var(--color-gray-400);
}

.form-input:hover {
  border-color: var(--color-gray-400);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--focus-ring);
  background: var(--color-white);
}

.form-input:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
  border-color: var(--color-gray-300);
}

.form-input:read-only {
  background: var(--color-gray-50);
  cursor: default;
}

/* Input variants */
.form-input--small {
  height: 36px;
  padding: 0 var(--space-xs);
  font-size: var(--font-size-sm);
}

.form-input--large {
  height: 56px;
  padding: 0 var(--space-lg);
  font-size: var(--font-size-lg);
}

/* Input states */
.form-input--success {
  border-color: var(--color-success);
}

.form-input--success:focus {
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.form-input--error {
  border-color: var(--color-border-error);
}

.form-input--error:focus {
  box-shadow: var(--focus-ring-error);
}

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

.form-textarea {
  width: 100%;
  min-height: 120px;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-system);
  line-height: var(--line-height-normal);
  background: var(--color-white);
  color: var(--color-gray-800);
  transition: var(--transition-fast);
  transition-property: border-color, box-shadow;
  resize: vertical;
}

.form-textarea::placeholder {
  color: var(--color-gray-400);
}

.form-textarea:hover {
  border-color: var(--color-gray-400);
}

.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--focus-ring);
}

.form-textarea:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
  resize: none;
}

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

.form-select {
  width: 100%;
  height: var(--input-height);
  padding: 0 var(--space-sm);
  padding-right: var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-system);
  background: var(--color-white);
  color: var(--color-gray-800);
  cursor: pointer;
  transition: var(--transition-fast);
  transition-property: border-color, box-shadow;
  
  /* Custom arrow */
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23666' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-sm) center;
  background-size: 12px 8px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.form-select:hover {
  border-color: var(--color-gray-400);
}

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

.form-select:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
}

/* =============================================
   CHECKBOXES AND RADIOS
   ============================================= */

/* Checkbox styles */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-700);
}

.checkbox-input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background: var(--color-white);
  transition: var(--transition-fast);
  transition-property: background-color, border-color, transform;
  position: relative;
  margin-top: 2px;
}

.checkbox-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 6px;
  width: 4px;
  height: 8px;
  border: 2px solid transparent;
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg) scale(0);
  transition: var(--transition-fast);
  border-color: var(--color-white);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-input:checked + .checkbox-custom::after {
  transform: rotate(45deg) scale(1);
}

.checkbox-input:focus + .checkbox-custom {
  box-shadow: var(--focus-ring);
}

.checkbox-input:disabled + .checkbox-custom {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
  cursor: not-allowed;
}

.checkbox-text {
  flex: 1;
  user-select: none;
}

/* Radio button styles */
.radio-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-700);
}

.radio-input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.radio-custom {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-white);
  transition: var(--transition-fast);
  transition-property: background-color, border-color;
  position: relative;
  margin-top: 2px;
}

.radio-custom::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-white);
  transform: scale(0);
  transition: var(--transition-fast);
}

.radio-input:checked + .radio-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.radio-input:checked + .radio-custom::after {
  transform: scale(1);
}

.radio-input:focus + .radio-custom {
  box-shadow: var(--focus-ring);
}

.radio-input:disabled + .radio-custom {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
  cursor: not-allowed;
}

.radio-text {
  flex: 1;
  user-select: none;
}

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

.form-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

.form-actions--center {
  justify-content: center;
}

.form-actions--right {
  justify-content: flex-end;
}

.form-actions--between {
  justify-content: space-between;
}

.form-actions--column {
  flex-direction: column;
}

/* =============================================
   FORM VALIDATION
   ============================================= */

.form-error {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  line-height: var(--line-height-normal);
  min-height: 1.2em;
}

.form-success {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-success);
  line-height: var(--line-height-normal);
}

.form-hint {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: var(--line-height-normal);
}

/* =============================================
   FORM LAYOUTS
   ============================================= */

/* Inline form layout */
.form--inline {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-end;
  flex-wrap: wrap;
}

.form--inline .form-group {
  margin-bottom: 0;
  flex: 1;
  min-width: 200px;
}

/* Grid form layout */
.form--grid {
  display: grid;
  gap: var(--space-lg);
}

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

.form--grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Compact form layout */
.form--compact .form-group {
  margin-bottom: var(--space-md);
}

.form--compact .form-label {
  font-size: var(--font-size-xs);
  margin-bottom: 4px;
}

.form--compact .form-input,
.form--compact .form-select {
  height: 36px;
  padding: 0 var(--space-xs);
  font-size: var(--font-size-sm);
}

/* =============================================
   SPECIAL INPUT TYPES
   ============================================= */

/* Password input wrapper */
.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-wrapper .form-input {
  padding-right: 48px;
}

.password-toggle {
  position: absolute;
  right: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-gray-500);
  transition: var(--transition-fast);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
}

.password-toggle:hover {
  color: var(--color-gray-700);
  background: rgba(0, 0, 0, 0.05);
}

.password-toggle:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.password-toggle__icon {
  font-size: 16px;
}

/* File input styling */
.file-input-wrapper {
  position: relative;
  display: inline-block;
  cursor: pointer;
  overflow: hidden;
}

.file-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-input-label {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background: var(--color-gray-50);
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.file-input-label:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

.file-input:focus + .file-input-label {
  box-shadow: var(--focus-ring);
  border-color: var(--color-primary);
}

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */

@media (max-width: 767px) {
  .form--inline {
    flex-direction: column;
  }
  
  .form--inline .form-group {
    min-width: auto;
    width: 100%;
  }
  
  .form--grid-2,
  .form--grid-3 {
    grid-template-columns: 1fr;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions--between {
    flex-direction: column;
  }
  
  .checkbox-label,
  .radio-label {
    align-items: flex-start;
  }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  .form-input,
  .form-textarea,
  .form-select {
    border-width: 2px;
  }
  
  .checkbox-custom,
  .radio-custom {
    border-width: 2px;
  }
  
  .form-input:focus,
  .form-textarea:focus,
  .form-select:focus {
    border-width: 3px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .form-input,
  .form-textarea,
  .form-select,
  .checkbox-custom,
  .radio-custom,
  .password-toggle {
    transition: none;
  }
}

/* =============================================
   PRINT STYLES
   ============================================= */

@media print {
  .form-input,
  .form-textarea,
  .form-select {
    border: 1px solid var(--color-black);
    background: transparent;
    color: var(--color-black);
  }
  
  .password-toggle {
    display: none;
  }
  
  .form-actions {
    display: none;
  }
}

/* =============================================
   UTILITY CLASSES
   ============================================= */

.form-group--full-width {
  grid-column: 1 / -1;
}

.form-group--half-width {
  grid-column: span 1;
}

.form-input--no-border {
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  background: transparent;
}

.form-input--no-border:focus {
  border-bottom-color: var(--color-primary);
  box-shadow: 0 1px 0 0 var(--color-primary);
}