/* ============================================================
 * Utilities Bunker — Fan CFM (Airflow Requirement) v2.1
 * File: /assets/css/modules/electronics/fan-cfm.v2.1.css
 * Purpose:
 * - Tool-only layout + airflow visualization + work formatting
 * - No changes to ub-toolkit.v2.1.css
 * - Mobile-first, 44x44 touch targets, clamp typography
 * ============================================================ */

/* ============================== Local tokens (tool-scoped) ============================== */
:root{
  --fan-radius: 16px;
  --fan-gap: 14px;
  --fan-soft: rgba(0,0,0,.06);
  --fan-soft-2: rgba(0,0,0,.04);
}

/* ============================== Tool hero layout ============================== */
.ub-hero{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--fan-gap);
}

/* Stack on tablet/mobile */
@media (max-width: 980px){
  .ub-hero{ grid-template-columns: 1fr; }
}

/* ============================== Lab panel ============================== */
.ub-lab{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--fan-radius);
  padding: 12px;
}

.ub-lab-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 8px;
}

.ub-lab-title{
  font-size: clamp(13px, 1.2vw, 14px);
  font-weight: 950;
  letter-spacing: .01em;
}

.ub-lab-sub{
  font-size: 12px;
  color: var(--ub-muted);
  margin-top: 2px;
}

/* ============================== KPI tiles ============================== */
.ub-kpis{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  justify-content:flex-end;
}

.ub-kpi{
  min-width: 112px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
}

.ub-kpi .k{
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--ub-muted);
}

.ub-kpi .v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 14px;
  margin-top: 2px;
}

/* ============================== Guidance pill ============================== */
.ub-risk{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
  font-size: 12px;
  font-weight: 950;
  min-height: 44px;
}

.ub-dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ub-muted);
}

/* ============================== Mode chips (tool) ============================== */
.ub-wheel{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
  margin-top: 10px;
}

.ub-wheel .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--ub-border);
  background: var(--ub-chip-bg);
  color: var(--ub-chip-text);
  font-weight: 900;
  cursor: pointer;
  user-select:none;
}

.ub-wheel .ub-chip:hover{
  background: var(--ub-chip-hover);
}

.ub-wheel .ub-chip[aria-pressed="true"]{
  border-color: rgba(249,58,19,.55);
  box-shadow: 0 0 0 4px rgba(249,58,19,.12);
}

/* ============================== Airflow viz ============================== */
.ub-airviz{
  margin-top: 12px;
  background: var(--ub-card-bg);
  border: 1px solid var(--ub-border);
  border-radius: var(--fan-radius);
  padding: 12px;
}

.ub-airviz-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 10px;
}

.ub-airviz-title{
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ub-muted);
}

.ub-airviz-sub{
  font-size: 12px;
  color: var(--ub-muted);
}

.ub-airbar{
  height: 18px;
  border-radius: 999px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-3);
  overflow: hidden;
}

.ub-airbar-fill{
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(92deg, var(--ub-btn-grad-a), var(--ub-btn-grad-b));
  box-shadow: 0 10px 18px var(--ub-btn-glow);
  transition: width 160ms ease;
}

@media (prefers-reduced-motion: reduce){
  .ub-airbar-fill{ transition: none; }
}

.ub-airviz-foot{
  margin-top: 10px;
  font-size: 12px;
}

/* ============================== Presets row ============================== */
.ub-preset-row{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-top: 12px;
}

.ub-preset-row .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
}

/* ============================== Mode input groups ============================== */
.ub-modebox{
  margin-top: 4px;
}

/* Improve spacing between mode blocks when swapped (keeps layout stable) */
.ub-modebox[hidden]{
  display:none !important;
}

/* Help hint + inline error (tool-scope reinforcement) */
.hint{
  margin-top: 6px;
  font-size: 12px;
  color: var(--ub-muted);
}

.ub-inline-error{
  margin-top: 6px;
  font-size: 12px;
  color: var(--ub-danger);
  font-weight: 800;
  min-height: 16px; /* keeps layout stable */
}

/* ============================== Outputs / work area ============================== */
.ub-work{
  font-family: var(--ub-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap:anywhere;
}

/* Details styling (tool enhancement) */
.ub-collapsible summary{
  cursor:pointer;
  font-weight: 950;
  min-height: 44px;
  display:flex;
  align-items:center;
}

.ub-collapsible summary:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--ub-focus);
  border-radius: 12px;
}

/* ============================== Rail helpers (tool-only) ============================== */
.ub-btn--block{ width: 100%; }

/* ============================== Small screens polish ============================== */
@media (max-width: 520px){
  .ub-kpi{ min-width: 98px; }
  .ub-wheel{ grid-template-columns: 1fr; }
}

/* ============================== Container-query hooks (optional future) ============================== */
.ub-lab.ub-cq,
.ub-airviz.ub-cq{
  container-type:inline-size;
}

/* Example: if a container is narrow, tighten KPI tiles */
@container (max-width: 420px){
  .ub-kpi{ min-width: 96px; }
}