/* ============================================================
   SD-FORM-ENGINE — Dynamic Form Component
   BEM: sd-form-engine, sd-form-engine__{element}
   Depends on: tokens.css, input.css, button.css
   ============================================================ */

/* ============================================================
   FORM ENGINE CONTAINER
   ============================================================ */
.sd-form-engine {
    width: 100%;
    padding: var(--space-5, 1.25rem);
    background: var(--bg-subtle, #f1f5f9);
    border: 1px solid var(--border-subtle, #f1f5f9);
    border-radius: var(--radius-md, 8px);
}

/* Subtle surface identity so the new engine reads distinct from legacy .form-group */
.sd-form-engine__form {
    width: 100%;
}

/* ============================================================
   FORM LABEL — stronger, consistent, slightly tracked
   ============================================================ */
.sd-form-label {
    font-weight: var(--font-semibold, 600);
    color: var(--text-secondary, #475569);
    letter-spacing: var(--tracking-wide, 0.025em);
}

/* ============================================================
   FORM ELEMENT
   ============================================================ */
.sd-form-engine__form {
    width: 100%;
}

/* ============================================================
   FIELDS CONTAINER
   ============================================================ */
.sd-form-engine__fields {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ============================================================
   FORM GROUP (field wrapper)
   ============================================================ */
.sd-form-engine .sd-form-group {
    margin-bottom: 1.25rem;
    transition: opacity var(--duration, 0.2s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
}

.sd-form-engine .sd-form-group[aria-hidden="true"] {
    display: none;
}

/* ============================================================
   FIELD WRAPPER
   ============================================================ */
.sd-form-engine__field-wrapper {
    position: relative;
}

/* ============================================================
   CHECKBOX WRAPPER
   ============================================================ */
.sd-form-engine__checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.sd-checkbox {
    width: 1rem;
    height: 1rem;
    margin-top: 0.125rem;
    border: 1px solid var(--border, #e1e1e1);
    border-radius: var(--radius-xs, 4px);
    background: var(--bg-base, #ffffff);
    cursor: pointer;
    appearance: none;
    transition:
        background var(--duration, 0.2s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1)),
        border-color var(--duration, 0.2s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
}

.sd-checkbox:checked {
    background: var(--accent, #2563eb);
    border-color: var(--accent, #2563eb);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 0.75rem;
}

.sd-checkbox:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-subtle, rgba(37, 99, 235, 0.12));
}

.sd-checkbox:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sd-checkbox__label {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-primary, #1a1a1a);
    cursor: pointer;
    line-height: 1.5;
}

.sd-checkbox:disabled + .sd-checkbox__label {
    color: var(--text-muted, #999999);
    cursor: not-allowed;
}

/* ============================================================
   RADIO GROUP
   ============================================================ */
.sd-form-engine__radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sd-form-engine__radio-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.sd-radio {
    width: 1rem;
    height: 1rem;
    margin-top: 0.125rem;
    border: 1px solid var(--border, #e1e1e1);
    border-radius: 50%;
    background: var(--bg-base, #ffffff);
    cursor: pointer;
    appearance: none;
    transition:
        background var(--duration, 0.2s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1)),
        border-color var(--duration, 0.2s) var(--ease, cubic-bezier(0.4, 0, 0.2, 1));
}

.sd-radio:checked {
    border-color: var(--accent, #2563eb);
    background: var(--bg-base, #ffffff);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='6' fill='%232563eb'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 0.75rem;
}

.sd-radio:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-subtle, rgba(37, 99, 235, 0.12));
}

.sd-radio:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sd-radio__label {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-primary, #1a1a1a);
    cursor: pointer;
    line-height: 1.5;
}

.sd-radio:disabled + .sd-radio__label {
    color: var(--text-muted, #999999);
    cursor: not-allowed;
}

/* ============================================================
   FORM SECTIONS
   ============================================================ */
.sd-form-engine__section {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-surface, #ffffff);
    border: 1px solid var(--border-subtle, #f0f0f0);
    border-radius: var(--radius-md, 10px);
}

.sd-form-engine__section-header {
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle, #f0f0f0);
}

.sd-form-engine__section-title {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary, #1a1a1a);
    margin: 0 0 0.25rem 0;
    line-height: 1.4;
}

.sd-form-engine__section-description {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--text-muted, #999999);
    margin: 0;
    line-height: 1.5;
}

.sd-form-engine__section-fields {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Nested sections */
.sd-form-engine__section .sd-form-engine__section {
    background: transparent;
    border: none;
    padding: 0;
    margin-top: 1rem;
}

/* ============================================================
   FORM ACTIONS (submit/cancel buttons)
   ============================================================ */
.sd-form-engine__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle, #f0f0f0);
}

/* Make the primary submit button stand out as the intended action */
.sd-form-engine__actions .sd-button--primary {
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04));
}

/* ============================================================
   FIELD GRID LAYOUTS
   ============================================================ */
.sd-form-engine--grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 1rem;
}

.sd-form-engine--grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0 1rem;
}

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

/* ============================================================
   COMPACT MODIFIER — dense layout for settings/dialog forms
   ============================================================ */
.sd-form-engine--compact .sd-form-group {
    margin-bottom: 0.625rem;
}

.sd-form-engine--compact .sd-form-label {
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-medium, 500);
    margin-bottom: 0.1875rem;
}

.sd-form-engine--compact .sd-input,
.sd-form-engine--compact .sd-select,
.sd-form-engine--compact .sd-textarea {
    padding: 0.3125rem 0.625rem;
    font-size: var(--text-sm, 0.875rem);
    min-height: 0;
}

.sd-form-engine--compact .sd-textarea {
    min-height: 4rem;
}

.sd-form-engine--compact .sd-form-engine__actions {
    margin-top: 0.75rem;
    padding-top: 0.625rem;
}

.sd-form-engine--compact .sd-form-engine__section {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
}

.sd-form-engine--compact .sd-form-engine__section-header {
    margin-bottom: 0.625rem;
    padding-bottom: 0.375rem;
}

/* ============================================================
   INLINE FORM LAYOUT
   ============================================================ */
.sd-form-engine--inline {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.75rem;
}

.sd-form-engine--inline .sd-form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 150px;
}

.sd-form-engine--inline .sd-form-engine__actions {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    flex-shrink: 0;
}

/* ============================================================
   HORIZONTAL FORM LAYOUT
   ============================================================ */
.sd-form-engine--horizontal .sd-form-group {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 0.75rem;
    align-items: start;
}

.sd-form-engine--horizontal .sd-form-label {
    margin-bottom: 0;
    padding-top: 0.5rem;
}

.sd-form-engine--horizontal .sd-form-engine__field-wrapper {
    display: flex;
    flex-direction: column;
}

.sd-form-engine--horizontal .sd-form-engine__actions {
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .sd-form-engine--horizontal .sd-form-group {
        grid-template-columns: 1fr;
    }
    
    .sd-form-engine--horizontal .sd-form-label {
        padding-top: 0;
    }
}

/* ============================================================
   MULTI-COLUMN FIELDS
   ============================================================ */
.sd-form-engine__field-row {
    display: flex;
    gap: 1rem;
}

.sd-form-engine__field-row > .sd-form-group {
    flex: 1;
}

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

/* ============================================================
   FORM VALIDATION SUMMARY
   ============================================================ */
.sd-form-engine__error-summary {
    padding: 1rem;
    margin-bottom: 1.5rem;
    background: var(--danger-subtle, rgba(209, 52, 56, 0.08));
    border: 1px solid var(--danger, #d13438);
    border-radius: var(--radius-sm, 6px);
}

.sd-form-engine__error-summary-title {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--danger, #d13438);
    margin: 0 0 0.5rem 0;
}

.sd-form-engine__error-summary-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sd-form-engine__error-summary-list li {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.8125rem;
    color: var(--danger, #d13438);
    padding: 0.25rem 0;
    line-height: 1.4;
}

.sd-form-engine__error-summary-list li::before {
    content: '\2022';
    margin-right: 0.5rem;
}

/* ============================================================
   SUCCESS MESSAGE
   ============================================================ */
.sd-form-engine__success {
    padding: 1rem;
    margin-bottom: 1.5rem;
    background: var(--success-subtle, rgba(16, 124, 16, 0.08));
    border: 1px solid var(--success, #107c10);
    border-radius: var(--radius-sm, 6px);
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.875rem;
    color: var(--success, #107c10);
}

/* ============================================================
   LOADING STATE
   ============================================================ */
.sd-form-engine--loading {
    pointer-events: none;
    opacity: 0.7;
}

.sd-form-engine--loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin-top: -1rem;
    margin-left: -1rem;
    border: 3px solid var(--border, #e1e1e1);
    border-top-color: var(--accent, #2563eb);
    border-radius: 50%;
    animation: sd-form-engine-spin 0.8s linear infinite;
}

@keyframes sd-form-engine-spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   FIELD SIZE VARIANTS
   ============================================================ */
.sd-form-engine .sd-form-group--sm .sd-input,
.sd-form-engine .sd-form-group--sm .sd-select,
.sd-form-engine .sd-form-group--sm .sd-textarea {
    font-size: 0.8125rem;
    padding: 0.375rem 0.625rem;
}

.sd-form-engine .sd-form-group--lg .sd-input,
.sd-form-engine .sd-form-group--lg .sd-select,
.sd-form-engine .sd-form-group--lg .sd-textarea {
    font-size: 1rem;
    padding: 0.625rem 1rem;
}

/* Gentle left accent on error fields to draw the eye without heavy motion */
.sd-form-engine .sd-form-group:has(.sd-input--error),
.sd-form-engine .sd-form-group:has(.sd-select--error),
.sd-form-engine .sd-form-group:has(.sd-textarea--error) {
    border-left: 2px solid var(--danger, #d13438);
    padding-left: calc(var(--space-3, 0.75rem) - 2px);
}

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme="dark"] .sd-form-engine {
}

[data-theme="dark"] .sd-form-engine .sd-form-group:hover {
    background: var(--bg-surface, #161822);
    border-color: var(--border-subtle, #252838);
}

[data-theme="dark"] .sd-form-engine__actions .sd-button--primary {
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.35), 0 1px 2px rgba(0, 0, 0, 0.25));
}

[data-theme="dark"] .sd-form-engine__section {
    background: var(--bg-surface, #1e1e1e);
    border-color: var(--border, #333333);
}

[data-theme="dark"] .sd-form-engine__section-header {
    border-bottom-color: var(--border, #333333);
}

[data-theme="dark"] .sd-form-engine__section-title {
    color: var(--text-primary, #e0e0e0);
}

[data-theme="dark"] .sd-form-engine__section-description {
    color: var(--text-muted, #666666);
}

[data-theme="dark"] .sd-checkbox {
    background: var(--bg-base, #121212);
    border-color: var(--border, #333333);
}

[data-theme="dark"] .sd-checkbox:checked {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
}

[data-theme="dark"] .sd-checkbox__label {
    color: var(--text-primary, #e0e0e0);
}

[data-theme="dark"] .sd-radio {
    background: var(--bg-base, #121212);
    border-color: var(--border, #333333);
}

[data-theme="dark"] .sd-radio__label {
    color: var(--text-primary, #e0e0e0);
}

[data-theme="dark"] .sd-form-engine__actions {
    border-top-color: var(--border, #333333);
}

[data-theme="dark"] .sd-form-engine__error-summary {
    background: rgba(209, 52, 56, 0.15);
}

[data-theme="dark"] .sd-form-engine__success {
    background: rgba(16, 124, 16, 0.15);
}

/* Pricing table (product edit) */
.sd-pricing-table-wrap {
    padding: var(--space-3, 1rem);
}

.sd-pricing-desc {
    color: var(--text-secondary, #6b7280);
    font-size: 0.875rem;
    margin-bottom: var(--space-3, 1rem);
}

.sd-pricing-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.sd-pricing-table th,
.sd-pricing-table td {
    padding: var(--space-2, 0.5rem);
    border-bottom: 1px solid var(--border, #e5e7eb);
    text-align: left;
    vertical-align: middle;
}

.sd-pricing-table th {
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    background: var(--bg-subtle, #f9fafb);
}

.sd-pricing-table .sd-input--sm {
    width: 110px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8125rem;
}

.sd-pricing-cycle {
    font-weight: 600;
    color: var(--text-primary, #111827);
    white-space: nowrap;
}

.sd-pricing-actions {
    white-space: nowrap;
}

.sd-pricing-actions .btn {
    margin-right: 0.25rem;
}

.sd-pricing-disabled {
    margin-top: var(--space-3, 1rem);
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius, 6px);
    padding: var(--space-2, 0.5rem) var(--space-3, 1rem);
}

.sd-pricing-disabled summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary, #111827);
}

.sd-pricing-disabled-list {
    margin-top: var(--space-2, 0.5rem);
}

.sd-pricing-disabled-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2, 0.5rem) 0;
    border-bottom: 1px solid var(--border, #e5e7eb);
}

.sd-pricing-disabled-item:last-child {
    border-bottom: none;
}

.sd-pricing-disabled-label {
    font-weight: 500;
    color: var(--text-secondary, #6b7280);
}