/**
 * Form Components
 *
 * Accessible form styling with WCAG 2.1 AA compliance.
 * Includes error states, focus indicators, and dark mode support.
 */

/* ===========================
   Form Group Layout
   =========================== */

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

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
}

.form-label .required-indicator {
  color: var(--color-danger);
  margin-left: var(--space-xs);
}

/* ===========================
   Input Styling
   =========================== */

.form-control {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface-0);
  border: 1px solid var(--bs-border-color);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control::placeholder {
  color: var(--color-text-tertiary);
  opacity: 1;
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: 0;
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(56, 189, 248, 0.25);
}

.form-control:disabled,
.form-control[readonly] {
  background-color: var(--color-surface-2);
  opacity: 0.7;
  cursor: not-allowed;
}

/* ===========================
   Error States
   =========================== */

.form-control.is-invalid {
  border-color: var(--color-danger);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc2626'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc2626' stroke='none'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 1rem;
  padding-right: calc(var(--space-md) * 2 + 1rem);
}

.form-control.is-invalid:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(220, 38, 38, 0.25);
}

.invalid-feedback {
  display: none;
  width: 100%;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
}

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

/* ===========================
   Success States
   =========================== */

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

.form-control.is-valid:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(5, 150, 105, 0.25);
}

.valid-feedback {
  display: none;
  width: 100%;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-success);
}

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

/* ===========================
   Help Text
   =========================== */

.form-text {
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ===========================
   Select Styling
   =========================== */

.form-select {
  display: block;
  width: 100%;
  padding: var(--space-sm) calc(var(--space-md) + 1.5rem) var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface-0);
  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='%23374151' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 1rem;
  border: 1px solid var(--bs-border-color);
  border-radius: var(--radius-md);
  appearance: none;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-select:focus {
  border-color: var(--color-primary);
  outline: 0;
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(56, 189, 248, 0.25);
}

.form-select:disabled {
  background-color: var(--color-surface-2);
  opacity: 0.7;
  cursor: not-allowed;
}

.form-select.is-invalid {
  border-color: var(--color-danger);
}

.form-select.is-invalid:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(220, 38, 38, 0.25);
}

.form-select.is-invalid ~ .invalid-feedback {
  display: block;
}

/* ===========================
   Textarea Styling
   =========================== */

textarea.form-control {
  min-height: calc(var(--space-md) * 2 + (var(--line-height-normal) * var(--font-size-base) * 3));
  resize: vertical;
}

/* ===========================
   Checkbox and Radio
   =========================== */

.form-check {
  display: flex;
  align-items: center;
  padding-left: 0;
  margin-bottom: var(--space-sm);
  min-height: auto;
}

/* Ensure form-check items in card-body have proper spacing */
.card-body .form-check {
  margin-left: 0;
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0;
  margin-left: 0;  /* Reset Bootstrap's negative margin */
  margin-right: var(--space-sm);
  flex-shrink: 0;
  border: 1px solid var(--bs-border-color);
  cursor: pointer;
}

.form-check-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(56, 189, 248, 0.25);
}

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

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

.form-check-label {
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  cursor: pointer;
}

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

/* ===========================
   Input Group
   =========================== */

.input-group .form-control:focus {
  z-index: 1;
}

.input-group-text {
  background-color: var(--color-surface-2);
  border: 1px solid var(--bs-border-color);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

/* ===========================
   Form Row / Grid
   =========================== */

.form-row {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.form-row > * {
  flex: 1;
}

/* ===========================
   File Input
   =========================== */

.form-control[type="file"] {
  padding: var(--space-sm);
}

.form-control[type="file"]::-webkit-file-upload-button {
  padding: var(--space-xs) var(--space-sm);
  margin-right: var(--space-sm);
  background-color: var(--color-surface-2);
  border: 1px solid var(--bs-border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
  background-color: var(--color-surface-3);
}

/* ===========================
   Dark Mode Overrides
   =========================== */

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
  background-color: var(--color-surface-2);
  border-color: var(--bs-border-color);
  color: var(--color-text-primary);
}

[data-bs-theme="dark"] .form-control::placeholder {
  color: var(--color-text-tertiary);
}

[data-bs-theme="dark"] .form-control:disabled,
[data-bs-theme="dark"] .form-control[readonly] {
  background-color: var(--color-surface-3);
}

[data-bs-theme="dark"] .input-group-text {
  background-color: var(--color-surface-1);
  border-color: var(--bs-border-color);
  color: var(--color-text-secondary);
}

[data-bs-theme="dark"] .form-select {
  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='%23E5E7EB' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

[data-bs-theme="dark"] .form-control[type="file"]::-webkit-file-upload-button {
  background-color: var(--color-surface-1);
  border-color: var(--bs-border-color);
  color: var(--color-text-primary);
}

/* ===========================
   Accessibility Enhancements
   =========================== */

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

  .form-control:focus,
  .form-select:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .form-control,
  .form-select {
    transition: none;
  }
}

/* Touch target size for mobile (WCAG 2.1 - 44x44px minimum) */
@media (max-width: 768px) {
  .form-control,
  .form-select {
    min-height: 44px;
    padding: var(--space-sm) var(--space-md);
  }

  .form-check-input {
    width: 1.5rem;
    height: 1.5rem;
  }
}