/* ============================================================
 * Utilities Bunker — Frequency ↔ Wavelength (v2.1)
 * File: /assets/css/modules/electronics/freq-wavelength.v2.1.css
 * Purpose:
 * - Tool-only layout + readout panel + wave diagram styling
 * - No changes to ub-toolkit.v2.1.css
 * - Mobile-first, 44x44 touch targets, clamp typography
 * ============================================================ */

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

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

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

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

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

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

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

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

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

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

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

/* Slightly tighter KPI tiles on very small screens */
@media (max-width: 520px){
  .ub-fw-kpi{ min-width: 98px; }
}

/* ============================== Diagram wrapper ============================== */
.ub-fw-diagram{
  margin-top: 10px;
  border-radius: 14px;
  overflow: hidden;
  background: var(--ub-card-bg);
  border: 1px solid var(--ub-border);
}

.ub-fw-svg{
  width: 100%;
  height: auto;
  display: block;
}

/* Boost contrast for dark mode wave stroke */
html.ub-theme-dark .ub-fw-svg path{
  stroke: rgba(255,255,255,.35) !important;
}

/* Keep λ bracket vivid in both themes */
html.ub-theme-dark .ub-fw-svg line{
  stroke: rgba(249,58,19,.75) !important;
}

/* ============================== Status pill ============================== */
.ub-fw-pill{
  margin-top: 10px;
  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; /* touch target */
}

/* dot is shared class from toolkit in Ohm page; safe here too */
.ub-fw-pill .ub-dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ub-muted);
}

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

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

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

/* ============================== Collapsible summary polish (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;
}

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