/* ============================================================
 * Utilities Bunker — Quantization Noise Power (v2.1)
 * File: /assets/css/modules/electronics/quant-noise.v2.1.css
 * Purpose:
 * - Tool-only layout + readout + lightweight visualization + work formatting
 * - NO changes to ub-toolkit.v2.1.css
 * - Mobile-first, 44x44 touch targets, clamp typography
 * ============================================================ */

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

/* ==============================
   Hero layout (lab + controls)
============================== */
.ub-hero{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--qn-gap);
}

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

/* ==============================
   Readout / Lab panel
============================== */
.ub-lab{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--qn-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 (same vibe as Ohm’s)
============================== */
.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;
}

/* ==============================
   Informational indicator 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 grid (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);
}

/* ==============================
   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 viz (conceptual)
============================== */
.ub-quant-viz{
  margin-top: 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
  padding: 10px;
}

.ub-quant-grid{
  position: relative;
  height: 130px;
  border-radius: 12px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(0,0,0,.04), rgba(0,0,0,.01));
}

html.ub-theme-dark .ub-quant-grid{
  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
}

/* faint grid lines */
.ub-quant-grid::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(to right, rgba(0,0,0,.06) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(to bottom, rgba(0,0,0,.06) 1px, transparent 1px) 0 0 / 24px 24px;
  opacity:.55;
  pointer-events:none;
}

html.ub-theme-dark .ub-quant-grid::before{
  background:
    linear-gradient(to right, rgba(255,255,255,.10) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(to bottom, rgba(255,255,255,.10) 1px, transparent 1px) 0 0 / 24px 24px;
  opacity:.35;
}

/* Stylized sine (static) */
.ub-quant-sine{
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 12% 60%, rgba(249,58,19,.15), transparent 40%),
    radial-gradient(circle at 52% 42%, rgba(249,58,19,.12), transparent 45%),
    radial-gradient(circle at 86% 54%, rgba(249,58,19,.14), transparent 42%);
  filter: saturate(1.05);
}

/* Stylized steps overlay (density changes via JS custom property) */
.ub-quant-step{
  position:absolute;
  inset:0;
  --q-steps: 64;
  background:
    repeating-linear-gradient(
      to right,
      rgba(249,58,19,.10) 0,
      rgba(249,58,19,.10) 1px,
      transparent 1px,
      transparent calc(100% / var(--q-steps))
    );
  mix-blend-mode: multiply;
  opacity: .85;
}

html.ub-theme-dark .ub-quant-step{
  mix-blend-mode: screen;
  opacity: .55;
}

/* ==============================
   Help hint + inline error
============================== */
.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 */
}

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

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