/* brain-cards.css — MR Brain V2 insight card styles
   PR-401: Brain Foundation
   Zero hardcoded colors or spacing — all from --mr-* tokens.
   Companion to mr-brain-engines.js
*/

/* ==========================================================================
   Insight container
   ========================================================================== */

.mr-brain-insights {
  display: flex;
  flex-direction: column;
  gap: var(--mr-space-md);
  padding: var(--mr-space-md) 0 var(--mr-space-lg);
}

/* ==========================================================================
   Card header: badge + title + dismiss button
   ========================================================================== */

.mr-brain-card-header {
  display: flex;
  align-items: center;
  gap: var(--mr-space-sm);
  margin-bottom: var(--mr-space-sm);
}

.mr-brain-card-title {
  flex: 1;
  font-size: var(--mr-font-body-sm);
  font-weight: var(--mr-weight-semibold);
  color: var(--mr-text);
  line-height: var(--mr-leading-tight);
}

/* ==========================================================================
   Dismiss button
   ========================================================================== */

.mr-brain-dismiss {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--mr-text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: var(--mr-space-xs);
  border-radius: var(--mr-radius-sm);
  transition: background var(--mr-transition), color var(--mr-transition);

  /* Minimum touch target: 24×24px on desktop, 44×44px on mobile via media query */
  min-width: 24px;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mr-brain-dismiss:hover {
  background: var(--mr-card-hover);
  color: var(--mr-text);
}

.mr-brain-dismiss:focus-visible {
  outline: 2px solid var(--mr-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   Business Score widget
   ========================================================================== */

.mr-brain-score {
  display: inline-flex;
  align-items: center;
  gap: var(--mr-space-xs);
  font-size: var(--mr-font-caption);
  font-weight: var(--mr-weight-semibold);
  color: var(--mr-text-secondary);
  white-space: nowrap;
}

.mr-brain-score--good     { color: var(--mr-success); }
.mr-brain-score--low      { color: var(--mr-warning); }
.mr-brain-score--critical { color: var(--mr-danger);  }

/* ==========================================================================
   Critical insight pulse on Brain topbar button
   ========================================================================== */

@keyframes mr-brain-pulse {
  0%,  100% { opacity: 1;   }
  50%        { opacity: 0.4; }
}

/* UX-013: Infinite pulse animation REMOVED — violates motion budget (no-loop rule).
   Class kept for backward compatibility. @keyframes kept in case it's reused
   for a one-shot version in a future task. */
.mr-brain-pulse {
  /* animation: mr-brain-pulse 1.5s ease infinite; — REMOVED by UX-013 */
}

/* Respect user's reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  .mr-brain-pulse {
    animation: none;
  }
}

/* ==========================================================================
   Responsive adjustments
   ========================================================================== */

@media (max-width: 767px) {
  .mr-brain-insights {
    padding: var(--mr-space-sm) 0 var(--mr-space-md);
    gap: var(--mr-space-sm);
  }

  /* Larger touch targets on mobile */
  .mr-brain-dismiss {
    min-width: 44px;
    min-height: 44px;
  }

  /* UX-009 Req 5: action buttons ≥ 44px touch target on mobile */
  .mr-brain-priority-card .mr-btn,
  .mr-brain-priority-card .mr-btn--sm {
    min-height: 44px;
    padding-top: var(--mr-space-sm);
    padding-bottom: var(--mr-space-sm);
  }
}

@media (max-width: 414px) {
  .mr-brain-card-title {
    font-size: var(--mr-font-caption);
  }
}

/* ==========================================================================
   PR-233: Explainability Panel — 4-section structured explanation
   What happened → Why → Confidence → Footer
   Replaces PR-420 simple why list with structured, trustworthy presentation.
   ========================================================================== */

.mr-brain-card-content {
  display: flex;
  flex-direction: column;
  gap: var(--mr-space-xs);
}

/* Toggle button */
.mr-brain-explain-panel {
  margin-top: var(--mr-space-sm);
  border-top: 1px solid var(--mr-border);
  padding-top: var(--mr-space-xs);
}

.mr-brain-explain-toggle {
  font-size: var(--mr-font-caption);
  font-weight: var(--mr-weight-semibold);
  color: var(--mr-primary);
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: var(--mr-space-xs);
  padding: var(--mr-space-xs) 0;
  user-select: none;
  transition: color var(--mr-transition);
}

.mr-brain-explain-toggle::-webkit-details-marker { display: none; }

.mr-brain-explain-toggle::before {
  content: '▶';
  font-size: 0.6em;
  color: var(--mr-primary);
  transition: transform var(--mr-transition);
}

.mr-brain-explain-panel[open] > .mr-brain-explain-toggle::before {
  transform: rotate(90deg);
}

.mr-brain-explain-toggle:hover { color: var(--mr-primary-hover); }

.mr-brain-explain-toggle:focus-visible {
  outline: 2px solid var(--mr-primary);
  outline-offset: 2px;
  border-radius: var(--mr-radius-sm);
}

/* Body */
.mr-brain-explain-body {
  display: flex;
  flex-direction: column;
  gap: var(--mr-space-sm);
  padding: var(--mr-space-sm) 0 var(--mr-space-xs);
}

/* Each section */
.mr-brain-explain-section {
  display: flex;
  flex-direction: column;
  gap: var(--mr-space-xs);
}

.mr-brain-explain-label {
  font-size: var(--mr-font-label);   /* 11px — UX-004 Req 5 */
  font-weight: var(--mr-weight-semibold);
  color: var(--mr-text-dim);
  text-transform: uppercase;
  letter-spacing: var(--mr-tracking-label);  /* 0.08em — UX-006: section label standard */
  margin: 0;
}

.mr-brain-explain-line {
  font-size: var(--mr-font-caption);
  color: var(--mr-text-secondary);
  margin: 0;
  line-height: var(--mr-leading-normal);
  overflow-wrap: break-word;  /* UX-004 Req 4: prevent horizontal overflow at 375px */
  word-break: break-word;
}

/* Confidence section */
.mr-brain-explain-section--confidence {
  border-top: 1px dashed var(--mr-border);
  padding-top: var(--mr-space-xs);
}

.mr-brain-explain-confidence {
  font-size: var(--mr-font-body-sm);
  font-weight: var(--mr-weight-semibold);
  color: var(--mr-success);
  margin: 0;
}

.mr-brain-explain-confidence--na {
  color: var(--mr-text-muted);
  font-weight: var(--mr-weight-regular);
}

.mr-brain-explain-conf-sources {
  font-size: var(--mr-font-caption);
  font-weight: var(--mr-weight-regular);
  color: var(--mr-text-muted);
}

/* Footer */
.mr-brain-explain-footer {
  font-size: var(--mr-font-caption);   /* 12px — UX-004 Req 6 */
  color: var(--mr-text-muted);         /* muted — visually separated from main content */
  margin: 0;
  padding-top: var(--mr-space-xs);
  border-top: 1px solid var(--mr-border);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .mr-brain-explain-toggle::before { transition: none; }
}

/* Mobile */
@media (max-width: 767px) {
  .mr-brain-explain-body { gap: var(--mr-space-xs); }
}

/* Keep old why-panel classes for backward compat (PR-420 cleanup) */
.mr-brain-why-panel { display: none; }

/* ==========================================================================
   PR-401A Polish: Brain card attribution line
   Appended by _addBrainAttribution() in mr-brain-engines.js.
   aria-hidden="true" — decorative only, not read by screen readers.
   ========================================================================== */

.mr-brain-card-attribution {
  margin: var(--mr-space-sm) 0 0;
  font-size: var(--mr-font-label);     /* 11px */
  font-weight: var(--mr-weight-regular);
  color: var(--mr-text-dim);
  letter-spacing: 0.02em;
  line-height: 1;
  user-select: none;
}