/**
 * Form Validation States
 * Comprehensive form validation styling for Amphibious 2.0
 * Includes error, success, warning states and helper text
 */

/* ========================================
   BASE FORM FIELD STRUCTURE
   ======================================== */

.aiab-form-field,
.aiab-input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.aiab-form-field:last-child,
.aiab-input-group:last-child {
  margin-bottom: 0;
}

/* ========================================
   VALIDATION STATE COLORS
   ======================================== */

:root {
  --validation-error: #dc2626;
  --validation-error-bg: #fee2e2;
  --validation-error-border: #fca5a5;

  --validation-success: #16a34a;
  --validation-success-bg: #dcfce7;
  --validation-success-border: #86efac;

  --validation-warning: #d97706;
  --validation-warning-bg: #fef3c7;
  --validation-warning-border: #fcd34d;

  --validation-info: #2563eb;
  --validation-info-bg: #dbeafe;
  --validation-info-border: #93c5fd;

  --validation-neutral: #6b7280;
  --validation-focus-ring: rgba(37, 99, 235, 0.2);
}

/* ========================================
   REQUIRED FIELD INDICATORS
   ======================================== */

/* Required asterisk */
.aiab-required,
label.aiab-required::after,
.aiab-form-label.aiab-required::after {
  content: " *";
  color: var(--validation-error);
  font-weight: 700;
  margin-left: 0.25rem;
}

/* Optional indicator (explicit) */
.aiab-optional::after,
label.aiab-optional::after,
.aiab-form-label.aiab-optional::after {
  content: " (optional)";
  color: var(--validation-neutral);
  font-size: 0.875em;
  font-weight: 400;
  margin-left: 0.25rem;
}

/* Required field group */
.aiab-form-field--required label::after,
.aiab-input-group--required label::after {
  content: " *";
  color: var(--validation-error);
  font-weight: 700;
  margin-left: 0.25rem;
}

/* ========================================
   BASE INPUT STATES
   ======================================== */

/* Default focus state */
input:focus,
textarea:focus,
select:focus,
.aiab-form-control:focus {
  outline: none;
  border-color: var(--validation-info);
  box-shadow: 0 0 0 3px var(--validation-focus-ring);
}

/* Disabled state */
input:disabled,
textarea:disabled,
select:disabled,
.aiab-form-control:disabled {
  background-color: #f3f4f6;
  color: #9ca3af;
  cursor: not-allowed;
  opacity: 0.6;
}

/* Read-only state */
input:read-only,
textarea:read-only,
.aiab-form-control:read-only {
  background-color: #f9fafb;
  border-style: dashed;
  cursor: default;
}

/* ========================================
   ERROR STATES
   ======================================== */

/* Error input styling */
.aiab-error input,
.aiab-error textarea,
.aiab-error select,
.aiab-error .aiab-form-control,
input.aiab-error,
textarea.aiab-error,
select.aiab-error,
.aiab-form-control.aiab-error,
input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"],
.aiab-is-invalid {
  border-color: var(--validation-error);
  background-color: #fff;
  color: #1f2937;
}

.aiab-error input:focus,
.aiab-error textarea:focus,
.aiab-error select:focus,
input.aiab-error:focus,
textarea.aiab-error:focus,
select.aiab-error:focus,
.aiab-is-invalid:focus {
  border-color: var(--validation-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

/* Error message */
.aiab-error-message,
.aiab-form-error,
.aiab-validation-error,
.aiab-invalid-feedback {
  display: block;
  color: var(--validation-error);
  font-size: 0.875rem;
  margin-top: 0.375rem;
  font-weight: 500;
  line-height: 1.5;
}

/* Error icon in input */
.aiab-error input,
input.aiab-error {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20' fill='none'%3E%3Ccircle cx='10' cy='10' r='9' stroke='%23dc2626' stroke-width='2'/%3E%3Cpath d='M10 6v4m0 4h.01' stroke='%23dc2626' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

/* ========================================
   SUCCESS STATES
   ======================================== */

/* Success input styling */
.aiab-success input,
.aiab-success textarea,
.aiab-success select,
.aiab-success .aiab-form-control,
input.aiab-success,
textarea.aiab-success,
select.aiab-success,
.aiab-form-control.aiab-success,
input[aria-valid="true"],
.aiab-is-valid {
  border-color: var(--validation-success);
  background-color: #fff;
  color: #1f2937;
}

.aiab-success input:focus,
.aiab-success textarea:focus,
.aiab-success select:focus,
input.aiab-success:focus,
textarea.aiab-success:focus,
select.aiab-success:focus,
.aiab-is-valid:focus {
  border-color: var(--validation-success);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.15);
}

/* Success message */
.aiab-success-message,
.aiab-form-success,
.aiab-validation-success,
.aiab-valid-feedback {
  display: block;
  color: var(--validation-success);
  font-size: 0.875rem;
  margin-top: 0.375rem;
  font-weight: 500;
  line-height: 1.5;
}

/* Success icon in input */
.aiab-success input,
input.aiab-success {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20' fill='none'%3E%3Ccircle cx='10' cy='10' r='9' stroke='%2316a34a' stroke-width='2'/%3E%3Cpath d='M6 10l3 3 5-6' stroke='%2316a34a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

/* ========================================
   WARNING STATES
   ======================================== */

/* Warning input styling */
.aiab-warning input,
.aiab-warning textarea,
.aiab-warning select,
.aiab-warning .aiab-form-control,
input.aiab-warning,
textarea.aiab-warning,
select.aiab-warning,
.aiab-form-control.aiab-warning {
  border-color: var(--validation-warning);
  background-color: #fff;
  color: #1f2937;
}

.aiab-warning input:focus,
.aiab-warning textarea:focus,
.aiab-warning select:focus,
input.aiab-warning:focus,
textarea.aiab-warning:focus,
select.aiab-warning:focus {
  border-color: var(--validation-warning);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

/* Warning message */
.aiab-warning-message,
.aiab-form-warning,
.aiab-validation-warning {
  display: block;
  color: var(--validation-warning);
  font-size: 0.875rem;
  margin-top: 0.375rem;
  font-weight: 500;
  line-height: 1.5;
}

/* Warning icon in input */
.aiab-warning input,
input.aiab-warning {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M10 2L2 18h16L10 2z' stroke='%23d97706' stroke-width='2' stroke-linejoin='round'/%3E%3Cpath d='M10 8v4m0 4h.01' stroke='%23d97706' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

/* ========================================
   HELPER TEXT & DESCRIPTIONS
   ======================================== */

/* Helper text (neutral) */
.aiab-helper-text,
.aiab-form-text,
.aiab-field-description,
.aiab-input-hint {
  display: block;
  color: var(--validation-neutral);
  font-size: 0.875rem;
  margin-top: 0.375rem;
  line-height: 1.5;
}

/* Helper text with icon */
.aiab-helper-text--icon {
  display: flex;
  align-items: flex-start;
  gap: 0.375rem;
}

.aiab-helper-text--icon::before {
  content: "";
  display: inline-block;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Ccircle cx='8' cy='8' r='7' stroke='%236b7280' stroke-width='1.5'/%3E%3Cpath d='M8 7v4m0-6h.01' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

/* Character count */
.aiab-character-count,
.aiab-field-counter {
  display: block;
  text-align: right;
  color: var(--validation-neutral);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

.aiab-character-count.aiab-warning {
  color: var(--validation-warning);
}

.aiab-character-count.error {
  color: var(--validation-error);
}

/* ========================================
   INLINE VALIDATION
   ======================================== */

/* Inline validation container */
.aiab-inline-validation {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.aiab-inline-validation input,
.aiab-inline-validation .aiab-form-control {
  flex: 1;
}

/* Inline validation indicator */
.aiab-validation-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.aiab-validation-indicator.aiab-success {
  background-color: var(--validation-success);
  color: white;
}

.aiab-validation-indicator.error {
  background-color: var(--validation-error);
  color: white;
}

.aiab-validation-indicator.aiab-loading {
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--validation-info);
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   GROUPED VALIDATION
   ======================================== */

/* Validation summary box */
.aiab-validation-summary {
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
}

.aiab-validation-summary.error {
  background-color: var(--validation-error-bg);
  border: 1px solid var(--validation-error-border);
  color: var(--validation-error);
}

.aiab-validation-summary.aiab-warning {
  background-color: var(--validation-warning-bg);
  border: 1px solid var(--validation-warning-border);
  color: var(--validation-warning);
}

.aiab-validation-summary h3,
.aiab-validation-summary-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
}

.aiab-validation-summary ul {
  margin: 0;
  padding-left: 1.5rem;
  list-style-type: disc;
}

.aiab-validation-summary li {
  line-height: 1.5;
  margin-bottom: 0.25rem;
}

/* ========================================
   FIELD GROUP VALIDATION
   ======================================== */

/* Radio/Checkbox group validation */
.aiab-field-group.error {
  padding: 0.75rem;
  background-color: var(--validation-error-bg);
  border: 1px solid var(--validation-error-border);
  border-radius: 0.375rem;
}

.aiab-field-group.aiab-success {
  padding: 0.75rem;
  background-color: var(--validation-success-bg);
  border: 1px solid var(--validation-success-border);
  border-radius: 0.375rem;
}

/* ========================================
   FLOATING LABEL VALIDATION
   ======================================== */

.aiab-floating-label {
  position: relative;
}

.aiab-floating-label input:placeholder-shown ~ label {
  transform: translateY(0);
}

.aiab-floating-label input:focus ~ label,
.aiab-floating-label input:not(:placeholder-shown) ~ label {
  transform: translateY(-1.5rem) scale(0.85);
}

.aiab-floating-label.error label {
  color: var(--validation-error);
}

.aiab-floating-label.aiab-success label {
  color: var(--validation-success);
}

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

/* Screen reader only text */
.aiab-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;
}

/* Focus visible for keyboard navigation */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--validation-info);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .error input,
  input.error {
    outline: 2px solid var(--validation-error);
  }

  .aiab-success input,
  input.aiab-success {
    outline: 2px solid var(--validation-success);
  }
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */

@media (--bp-sm-down) {
  .aiab-error-message,
  .aiab-success-message,
  .aiab-helper-text {
    font-size: 0.8125rem;
  }

  .aiab-validation-summary {
    padding: 0.75rem;
  }
}

/* ========================================
   DARK MODE SUPPORT
   ======================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --validation-error: #f87171;
    --validation-error-bg: #7f1d1d;
    --validation-error-border: #991b1b;

    --validation-success: #4ade80;
    --validation-success-bg: #14532d;
    --validation-success-border: #166534;

    --validation-warning: #fbbf24;
    --validation-warning-bg: #78350f;
    --validation-warning-border: #92400e;
  }

  input:disabled,
  textarea:disabled,
  select:disabled {
    background-color: #1f2937;
    color: #6b7280;
  }

  input:read-only,
  textarea:read-only {
    background-color: #111827;
  }
}