/* Accessibility & Form Enhancements */

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

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-md);
  z-index: var(--z-tooltip);
  text-decoration: none;
  border-radius: var(--radius-md);
}

.skip-to-content:focus {
  top: 0;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  :root {
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  }

  button,
  .btn {
    border: 2px solid currentColor;
  }

  input,
  textarea,
  select {
    border-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Large text support */
@media (prefers-color-scheme: light) and (max-width: 600px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: var(--font-size-3xl);
  }

  h2 {
    font-size: var(--font-size-2xl);
  }
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ====== Form Enhancements ====== */

.form-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  animation: slideInUp 400ms ease-out;
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  transition: color var(--transition-fast);
  font-size: var(--font-size-sm);
}

.form-group label .required {
  color: var(--color-error);
  margin-inline-start: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  color: var(--color-gray-900);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
  appearance: none;
}

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

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

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-white);
  box-shadow: 0 0 0 4px var(--color-primary-lighter);
  transform: scale(1.001);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}

.form-group select {
  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 fill='%23374151' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

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

.form-group input.is-invalid,
.form-group textarea.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 4px var(--color-error-light);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

.form-help {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* ====== Input Groups ====== */

.input-group {
  display: flex;
  align-items: center;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.input-group:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-lighter);
}

.input-group input {
  border: none;
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
}

.input-group button,
.input-group .btn {
  border: none;
  border-radius: 0;
  padding: var(--spacing-md) var(--spacing-lg);
  margin: 0;
}

/* ====== Checkbox & Radio ====== */

.checkbox-wrapper,
.radio-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
  user-select: none;
  animation: slideInUp 400ms ease-out;
}

.checkbox-wrapper input[type="checkbox"],
.radio-wrapper input[type="radio"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: var(--color-white);
  flex-shrink: 0;
}

.radio-wrapper input[type="radio"] {
  border-radius: 50%;
}

.checkbox-wrapper input[type="checkbox"]:hover,
.radio-wrapper input[type="radio"]:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-lighter);
}

.checkbox-wrapper input[type="checkbox"]:checked,
.radio-wrapper input[type="radio"]:checked {
  background: var(--gradient-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.checkbox-wrapper input[type="checkbox"]:checked::after {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: bold;
}

.checkbox-wrapper input[type="checkbox"]:focus-visible,
.radio-wrapper input[type="radio"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ====== Select Enhancements ====== */

.select-wrapper {
  position: relative;
  display: inline-block;
  width: 100%;
}

.select-wrapper select {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  background: var(--color-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23374151' d='M6 9L1 4h10z'/%3E%3C/svg%3E") no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
  appearance: none;
  transition: all var(--transition-normal);
}

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

.select-wrapper select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-lighter);
}

/* ====== Button Groups ====== */

.button-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: flex-end;
}

@media (max-width: 640px) {
  .button-group {
    flex-direction: column;
  }

  .button-group button,
  .button-group .btn {
    width: 100%;
  }
}

/* ====== Validation States ====== */

.is-valid {
  border-color: var(--color-success) !important;
}

.is-valid:focus {
  box-shadow: 0 0 0 4px var(--color-success-light) !important;
}

.is-invalid {
  border-color: var(--color-error) !important;
}

.is-invalid:focus {
  box-shadow: 0 0 0 4px var(--color-error-light) !important;
}

.is-warning {
  border-color: var(--color-warning) !important;
}

.is-warning:focus {
  box-shadow: 0 0 0 4px var(--color-warning-light) !important;
}

/* ====== Form Sizes ====== */

.form-group.form-sm input,
.form-group.form-sm textarea,
.form-group.form-sm select {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.form-group.form-lg input,
.form-group.form-lg textarea,
.form-group.form-lg select {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* ====== Field Layout ====== */

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

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

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

@media (max-width: 768px) {
  .form-row,
  .form-col-2,
  .form-col-3 {
    grid-template-columns: 1fr;
  }
}

/* ====== Textarea with char count ====== */

.textarea-wrapper {
  position: relative;
}

.char-count {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  background: var(--color-white);
  padding: 0 4px;
}

.textarea-wrapper textarea:focus ~ .char-count {
  color: var(--color-primary);
}

/* ====== Label with icon ====== */

.label-with-icon {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.label-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

/* ====== Responsive Form ====== */

@media (max-width: 640px) {
  .form-group {
    gap: var(--spacing-sm);
  }

  .form-group label {
    font-size: var(--font-size-base);
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: var(--spacing-md);
    font-size: 16px; /* Prevents zoom on mobile */
  }

  .button-group {
    flex-direction: column-reverse;
  }

  .button-group button,
  .button-group .btn {
    width: 100%;
  }
}

/* ====== Dark mode adjustments ====== */

@media (prefers-color-scheme: dark) {
  .form-group input,
  .form-group textarea,
  .form-group select {
    background-color: var(--color-gray-800);
    color: var(--color-white);
    border-color: var(--color-gray-600);
  }

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

  .form-group input:hover,
  .form-group textarea:hover,
  .form-group select:hover {
    border-color: var(--color-gray-500);
  }

  .form-group input:focus,
  .form-group textarea:focus,
  .form-group select:focus {
    border-color: var(--color-primary);
    background-color: var(--color-gray-800);
  }

  .select-wrapper select {
    background-color: var(--color-gray-800);
    color: var(--color-white);
    border-color: var(--color-gray-600);
  }

  .checkbox-wrapper input[type="checkbox"],
  .radio-wrapper input[type="radio"] {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-600);
  }
}