/**
 * Form Component Styles - Air Tasman Login Page
 * Comprehensive form styling with accessibility and UX focus
 */

/* =====================
   FORM CONTAINER
   ===================== */

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
  max-width: var(--form-max-width);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  position: relative;
}

.form-group--checkbox {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-sm);
}

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

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  line-height: var(--line-height-tight);
}

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

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

.form-input {
  height: var(--input-height);
  padding: 12px 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-color: var(--color-white);
  transition: var(--transition-fast);
  transition-property: border-color, box-shadow, background-color;
  width: 100%;
}

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

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

/* Input Error States */
.form-input--error {
  border-color: var(--color-border-error);
  background-color: #FEF2F2;
}

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

/* Input Success States */
.form-input--success {
  border-color: var(--color-success);
  background-color: #F0FDF4;
}

/* Disabled Input States */
.form-input:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
  opacity: 0.6;
}

/* =====================
   PASSWORD INPUT WRAPPER
   ===================== */

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

.password-input-wrapper .form-input {
  padding-right: 60px;
}

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

.password-toggle:hover {
  background-color: var(--color-gray-100);
}

.password-toggle:focus {
  outline: none;
  background-color: var(--color-gray-100);
  box-shadow: var(--focus-ring);
}

.password-toggle__icon {
  font-size: var(--font-size-lg);
  line-height: 1;
}

/* =====================
   CHECKBOX STYLING
   ===================== */

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  cursor: pointer;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-gray-700);
  min-height: var(--touch-target-min);
  padding: var(--space-xs) 0;
}

.checkbox-input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  width: 0;
  height: 0;
}

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

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

/* Checkbox checkmark */
.checkbox-input:checked + .checkbox-custom::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid var(--color-white);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

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

/* Checkbox hover state */
.checkbox-label:hover .checkbox-custom {
  border-color: var(--color-primary);
}

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

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

/* =====================
   FORM ERROR MESSAGES
   ===================== */

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  line-height: var(--line-height-normal);
  min-height: 20px;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  opacity: 0;
  transform: translateY(-4px);
  transition: var(--transition-fast);
  transition-property: opacity, transform;
}

.form-error--visible {
  opacity: 1;
  transform: translateY(0);
}

.form-error::before {
  content: '⚠️';
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

/* Animate error appearance */
.form-error--visible.animate-shake {
  animation: shake 0.5s var(--ease-out);
}

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

.form-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* =====================
   FORM FOOTER
   ===================== */

.form-footer {
  display: flex;
  justify-content: center;
  margin-top: var(--space-md);
}

.link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  border-radius: var(--border-radius-sm);
  padding: var(--space-xs) var(--space-sm);
  margin: calc(var(--space-xs) * -1) calc(var(--space-sm) * -1);
}

.link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.link:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

.link--secondary {
  color: var(--color-gray-600);
}

.link--secondary:hover {
  color: var(--color-gray-800);
}

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

@media (max-width: 767px) {
  .form-group {
    gap: var(--space-xs);
  }
  
  .form-actions {
    margin-top: var(--space-lg);
  }
  
  .checkbox-label {
    font-size: var(--font-size-base);
  }
}

/* =====================
   HIGH CONTRAST MODE
   ===================== */

@media (prefers-contrast: high) {
  .form-input {
    border-width: 2px;
  }
  
  .form-input:focus {
    border-width: 3px;
  }
  
  .checkbox-custom {
    border-width: 3px;
  }
}

/* =====================
   LOADING STATES
   ===================== */

.form-loading .form-input {
  pointer-events: none;
  opacity: 0.7;
}

.form-loading .checkbox-label {
  pointer-events: none;
  opacity: 0.7;
}

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

@keyframes fieldError {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-2px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(2px);
  }
}

.form-input--error.animate-error {
  animation: fieldError 0.5s var(--ease-out);
}