/* ============================================================
 * Utilities Bunker — SNR Calculator (v2.1)
 * File: /assets/css/modules/electronics/snr.v2.1.css
 * Purpose:
 * - Tool-only layout + SNR lab visuals + work formatting
 * - No changes to ub-toolkit.v2.1.css
 * - Mobile-first, 44x44 touch targets, clamp typography
 * ============================================================ */

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

/* ============================== Tool hero layout ============================== */
.snr-hero{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--snr-gap);
}

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

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

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

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

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

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

.snr-kpi{
  min-width: 122px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
}

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

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

/* ============================== Quality pill ============================== */
.snr-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;
}

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

/* ============================== Mode row chips ============================== */
.snr-mode{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin: 8px 0 10px;
}

.snr-mode .ub-chip{
  min-height: 44px;
  padding: 10px 14px;
}

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

.snr-quick .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
}

/* ============================== Lab note ============================== */
.snr-note{
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-3);
  color: var(--ub-text);
  font-size: 12px;
  line-height: 1.45;
}

.snr-note code{
  font-family: var(--ub-mono);
  font-size: 12px;
}

/* ============================== Thermal output block ============================== */
.snr-thermal-out{
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--snr-radius);
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-2);
}

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

/* Details styling enhancement (safe) */
.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 helper (tool-only) ============================== */
.ub-btn--block{ width:100%; }

/* ============================== Small screens polish ============================== */
@media (max-width: 520px){
  .snr-kpi{ min-width: 108px; }
}