/* ============================================================
   Tool Styles — Three-Phase Power v2.1
   File: /assets/css/modules/electronics/3phase-power.v2.1.css
   Purpose:
   - Tool-only layout + 3φ readout visuals + work formatting
   - No changes to ub-toolkit.v2.1.css required
   - Mobile-first, 44x44 touch targets, clamp typography
   ============================================================ */

/* ==============================
   Local tokens (tool-scoped)
   ============================== */
:root{
  --t3p-radius: 16px;
  --t3p-gap: 14px;
  --t3p-soft: rgba(0,0,0,.06);
}

/* ==============================
   Tool hero layout
   ============================== */
.ub-hero{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--t3p-gap);
}

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

/* ==============================
   System Readout panel
   ============================== */
.ub-lab{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--t3p-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;
}

/* ==============================
   Status 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);
}

/* ==============================
   Diagram SVG
   ============================== */
.ub-circuit{
  width: 100%;
  height: auto;
  margin-top: 10px;
  display:block;
  border-radius: 14px;
}

@keyframes ub-flow{
  from{ stroke-dashoffset: 60; }
  to{ stroke-dashoffset: 0; }
}

.ub-flow{
  stroke-dasharray: 6 8;
  animation: ub-flow 900ms linear infinite;
}

/* Accessible focus ring for chips (SVG text is not interactive here) */
.ub-wheel .ub-chip:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--ub-focus);
  border-radius: 10px;
}

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

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

/* ==============================
   Tool 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 button block helper
   (tool-only; safe even if toolkit has it)
   ============================== */
.ub-btn--block{
  width: 100%;
}

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

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

/* If the lab gets narrow, stack KPI tiles more tightly */
@container (max-width: 420px){
  .ub-kpi{ min-width: 98px; }
}