/* ============================================================
   Utilities Bunker — Band-Pass Filter Calculator (v2.1)
   File: /assets/css/modules/electronics/bandpass.v2.1.css
   Purpose:
   - Tool-only layout + lab visuals + KPI tiles + band window viz
   - Mobile-first, 44x44 touch targets, clamp typography
   - NO changes to ub-toolkit.v2.1.css
   ============================================================ */

/* ============================== Local tokens (tool-scoped) ============================== */
:root{
  --bpf-radius: 16px;
  --bpf-gap: 14px;
}

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

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

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

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

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

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

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

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

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

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

/* ============================== Status pill ============================== */
.ub-bpf-badge{
  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;
}

/* dot comes from toolkit in ohms-law flow; define safe fallback */
.ub-dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ub-muted);
}

/* ============================== Mode chips row (tool) ============================== */
.ub-bpf-modechips{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
}

/* ============================== Band window visualization ============================== */
.ub-bpf-window{
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--ub-border);
  border-radius: 14px;
  background: var(--ub-card-bg);
}

.ub-bpf-window .axis{
  display:flex;
  justify-content:space-between;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 10px;
}

.ub-bpf-window .axis .lbl{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 12px;
  color: var(--ub-muted);
}

.ub-bpf-window .bar{
  position: relative;
  height: 16px;
  border-radius: 999px;
  background: var(--ub-surface-3);
  border: 1px solid var(--ub-border);
  overflow:hidden;
}

.ub-bpf-window .band{
  position:absolute;
  top:0;
  bottom:0;
  left:0%;
  width:0%;
  border-radius: 999px;
  background: linear-gradient(92deg, var(--ub-btn-grad-a), var(--ub-btn-grad-b));
  opacity: .35;
}

html.ub-theme-dark .ub-bpf-window .band{
  opacity: .40;
}

.ub-bpf-window .center{
  position:absolute;
  top:-6px;
  width: 2px;
  height: 28px;
  left: 0%;
  background: rgba(0,0,0,.55);
}

html.ub-theme-dark .ub-bpf-window .center{
  background: rgba(255,255,255,.65);
}

.ub-bpf-window .note{
  margin-top: 10px;
  font-size: 12px;
  color: var(--ub-muted);
}

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

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

/* ============================== Panels / Mini outputs ============================== */
.ub-bpf-panel{
  margin: 0;
  padding: 0;
  border: none;
}

.ub-bpf-mini{
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-2);
}

.ub-bpf-mini-row{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(0,0,0,.06);
}

html.ub-theme-dark .ub-bpf-mini-row{
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.ub-bpf-mini-row:last-child{
  border-bottom: 0;
}

.ub-bpf-mini .mini-k{
  font-size: 12px;
  font-weight: 950;
  color: var(--ub-muted);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.ub-bpf-mini .mini-v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 13px;
  text-align:right;
  min-width: 140px;
}

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

/* ============================== Suggest box formatting ============================== */
#suggestBox{
  white-space: pre-wrap;
  overflow-wrap:anywhere;
}

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

/* ============================== Small screens polish ============================== */
@media (max-width: 520px){
  .ub-bpf-kpi{ min-width: 98px; }
  .ub-bpf-mini .mini-v{ min-width: 120px; }
}

/* ============================== Focus polish for chips (tool layer) ============================== */
.ub-bpf-modechips .ub-chip:focus,
.ub-bpf-preset-row .ub-chip:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--ub-focus);
}