/* ==========================================================================
   FORMS
   Modern form component styles using design tokens
   ========================================================================== */

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

.form-group {
  margin-bottom: var(--space-5);
}

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

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

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-md);
  font-weight: var(--font-medium);
  color: var(--color-neutral-900);
  line-height: var(--leading-normal);
}

.form-label-required::after {
  content: " *";
  color: var(--color-error-500);
}

.form-label-optional {
  font-weight: var(--font-normal);
  color: var(--color-neutral-500);
  font-size: var(--text-sm);
}

/* ====================
   FORM CONTROLS
   ==================== */

.form-control {
  display: block;
  width: 100%;
  height: 2.75rem;
  padding: var(--padding-sm) var(--padding-md);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-neutral-900);
  background-color: var(--bg-surface);
  border: var(--border-width-thin) solid var(--border-default);
  border-radius: var(--radius-md);
  transition: var(--transition-colors), var(--transition-shadow);
  appearance: none;
}

.form-control::placeholder {
  color: var(--color-neutral-400);
}

.form-control:hover:not(:disabled):not(.is-invalid) {
  border-color: var(--border-hover);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(46, 46, 153, 0.1);
}

.form-control:disabled {
  background-color: var(--color-neutral-100);
  color: var(--color-neutral-500);
  cursor: not-allowed;
  opacity: 0.6;
}

/* ====================
   FORM CONTROL SIZES
   ==================== */

.form-control-sm {
  height: 2.25rem;
  padding: var(--padding-xs) var(--padding-sm);
  font-size: var(--text-sm);
}

.form-control-lg {
  height: 3.25rem;
  padding: var(--padding-md) var(--padding-lg);
  font-size: var(--text-lg);
}

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

textarea.form-control {
  height: auto;
  min-height: 6rem;
  resize: vertical;
  padding: var(--padding-md);
}

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

select.form-control {
  padding-right: 2.5rem;
  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 var(--padding-md) center;
  background-size: 12px;
}

select.form-control[multiple] {
  height: auto;
  padding-right: var(--padding-md);
  background-image: none;
}

/* ====================
   FORM CHECK (Radio & Checkbox)
   ==================== */

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--gap-sm);
  margin-bottom: var(--space-3);
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
  flex-shrink: 0;
  border: var(--border-width-thin) solid var(--border-default);
  background-color: var(--bg-surface);
  transition: var(--transition-colors);
  cursor: pointer;
}

.form-check-input[type="checkbox"] {
  border-radius: var(--radius-sm);
}

.form-check-input[type="radio"] {
  border-radius: var(--radius-full);
}

.form-check-input:checked {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.form-check-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(46, 46, 153, 0.1);
}

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

.form-check-label {
  font-size: var(--text-md);
  color: var(--color-neutral-900);
  cursor: pointer;
  user-select: none;
}

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

/* ====================
   FORM SWITCH
   ==================== */

.form-switch {
  position: relative;
}

.form-switch .form-check-input {
  width: 2.5rem;
  height: 1.5rem;
  border-radius: var(--radius-full);
  background-color: var(--color-neutral-300);
  border: none;
  cursor: pointer;
  transition: var(--transition-colors);
}

.form-switch .form-check-input::after {
  content: "";
  position: absolute;
  top: 0.125rem;
  left: 0.125rem;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--bg-surface);
  border-radius: var(--radius-full);
  transition: var(--transition-transform);
}

.form-switch .form-check-input:checked {
  background-color: var(--color-primary-700);
}

.form-switch .form-check-input:checked::after {
  transform: translateX(1rem);
}

/* ====================
   INPUT GROUP
   ==================== */

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

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

.input-group > .form-control:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

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

.input-group-text {
  display: flex;
  align-items: center;
  padding: var(--padding-sm) var(--padding-md);
  font-size: var(--text-md);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-neutral-700);
  text-align: center;
  white-space: nowrap;
  background-color: var(--color-neutral-100);
  border: var(--border-width-thin) solid var(--border-default);
}

.input-group > .input-group-text:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
  border-right: none;
}

.input-group > .input-group-text:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  border-left: none;
}

/* ====================
   FORM HELP TEXT
   ==================== */

.form-text {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  line-height: var(--leading-normal);
}

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

/* Valid state */
.form-control.is-valid,
.form-control:valid:not(:placeholder-shown) {
  border-color: var(--border-success);
}

.form-control.is-valid:focus {
  border-color: var(--border-success);
  box-shadow: 0 0 0 3px rgba(21, 128, 61, 0.1);
}

.valid-feedback {
  display: none;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-success-600);
}

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

/* Invalid state */
.form-control.is-invalid,
.form-control:invalid:not(:placeholder-shown) {
  border-color: var(--border-error);
}

.form-control.is-invalid:focus {
  border-color: var(--border-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.invalid-feedback {
  display: none;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error-600);
}

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

/* ASP.NET validation classes */
.field-validation-error {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error-600);
}

.input-validation-error {
  border-color: var(--border-error) !important;
}

.validation-summary-errors {
  padding: var(--padding-md);
  margin-bottom: var(--space-5);
  background-color: var(--color-error-100);
  border: var(--border-width-thin) solid var(--color-error-500);
  border-radius: var(--radius-md);
  color: var(--color-error-600);
}

.validation-summary-errors ul {
  margin: 0;
  padding-left: var(--space-5);
}

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

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-md);
  margin-bottom: var(--space-5);
}

.form-row > * {
  flex: 1;
  min-width: 200px;
}

@media (max-width: 768px) {
  .form-row {
    flex-direction: column;
  }

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

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

.form-floating {
  position: relative;
}

.form-floating > .form-control {
  padding: 1rem var(--padding-md) var(--padding-sm);
}

.form-floating > label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 1rem var(--padding-md);
  pointer-events: none;
  transform-origin: 0 0;
  transition: var(--transition-all);
  color: var(--color-neutral-500);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
  transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
  color: var(--color-primary-700);
}