/* ============================================================
 * Utilities Bunker — Ripple Voltage Calculator (v2.1)
 * File: /assets/css/modules/electronics/ripple.v2.1.css
 * Purpose:
 * - Tool-only layout + KPI panel + waveform visuals + work formatting
 * - No changes to ub-toolkit.v2.1.css
 * - Mobile-first, 44×44 touch targets, clamp typography
 * ============================================================ */

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

/* ============================== Header row ============================== */
.rv-head{
  display:flex;
  gap:10px;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
}
.rv-title{
  margin:0;
  font-size: var(--ub-fs-5);
}
.rv-sub{
  margin:6px 0 0;
}

/* ============================== Tool hero layout ============================== */
.rv-hero{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--rv-gap);
}
@media (max-width: 980px){
  .rv-hero{ grid-template-columns: 1fr; }
}

/* ============================== Left panel ============================== */
.rv-panel{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--rv-radius);
  padding: 12px;
}
.rv-panel-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 8px;
}
.rv-panel-title{
  font-size: clamp(13px, 1.2vw, 14px);
  font-weight: 950;
  letter-spacing: .01em;
}
.rv-panel-sub{
  font-size: 12px;
  color: var(--ub-muted);
  margin-top: 2px;
}

/* ============================== KPI tiles ============================== */
.rv-kpis{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  justify-content:flex-end;
}
.rv-kpi{
  min-width: 118px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
}
.rv-kpi .k{
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--ub-muted);
}
.rv-kpi .v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 14px;
  margin-top: 2px;
}

/* ============================== Waveform SVG ============================== */
.rv-wave{
  width: 100%;
  height: auto;
  margin-top: 10px;
  display:block;
  border-radius: 14px;
}
html.ub-theme-dark .rv-wave text{
  fill: rgba(255,255,255,.70);
}
html.ub-theme-dark .rv-wave rect{
  stroke: rgba(255,255,255,.14);
  fill: rgba(255,255,255,.03);
}
html.ub-theme-dark .rv-wave path{
  stroke: rgba(255,255,255,.20);
}

/* Keep the ripple line accent visible in dark */
html.ub-theme-dark #rvWavePath{
  stroke: rgba(249,58,19,.60);
}

/* ============================== Presets row ============================== */
.rv-preset-row{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-top: 10px;
}
.rv-preset-row .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
}

/* ============================== Mode chips row ============================== */
.rv-mode{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
}
.rv-mode .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
}
.rv-mode .ub-chip[aria-pressed="true"]{
  border-color: rgba(249,58,19,.55);
  box-shadow: 0 0 0 4px rgba(249,58,19,.12);
}

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

/* ============================== Advanced outputs ============================== */
.rv-adv{
  margin-top: 12px;
  border-top: 1px solid var(--ub-border);
  padding-top: 12px;
}
.rv-adv-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px 14px;
}
@media (max-width: 520px){
  .rv-adv-grid{ grid-template-columns: 1fr; }
}

/* Advanced "ub-v" inside grid is big by default; tone it down slightly */
.rv-adv-grid .ub-v{
  font-size: var(--ub-fs-2);
}

/* ============================== Small screens polish ============================== */
@media (max-width: 520px){
  .rv-kpi{ min-width: 102px; }
}

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