/* ============================================================
   Tool Styles — 555 Timer (Astable Mode) v2.1
   File: /assets/css/modules/electronics/555-astable.v2.1.css
   Purpose:
   - Tool-only layout + lab visuals + waveform + work formatting
   - Mobile-first, 44x44 touch targets, clamp typography
   - NO changes to ub-toolkit.v2.1.css
   ============================================================ */

/* ==============================
   Local tokens (tool-scoped)
   ============================== */
:root{
  --t555-radius: 16px;
  --t555-gap: 14px;
  --t555-soft: rgba(0,0,0,.06);
  --t555-soft-2: rgba(0,0,0,.10);
}

/* ==============================
   Header row
   ============================== */
.ub-555-head{
  display:flex;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
}

.ub-555-title{
  font-size: var(--ub-fs-5);
  letter-spacing: -0.02em;
}

/* ==============================
   How-to list
   ============================== */
.ub-555-ol{
  margin:0;
  padding-left: 18px;
}
.ub-555-ol li{ margin: 6px 0; }

/* ==============================
   Hero layout (Lab + Inputs)
   ============================== */
.ub-555-hero{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--t555-gap);
}

/* Stack on tablet/mobile */
@media (max-width: 980px){
  .ub-555-hero{ grid-template-columns: 1fr; }
}

/* ==============================
   Lab panel
   ============================== */
.ub-555-lab{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--t555-radius);
  padding: 12px;
}

.ub-555-labtop{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 10px;
}

.ub-555-labtitle{
  font-size: clamp(13px, 1.2vw, 14px);
  font-weight: 950;
  letter-spacing: .01em;
}

.ub-555-labsub{
  font-size: 12px;
  color: var(--ub-muted);
  margin-top: 2px;
}

/* ==============================
   KPI tiles (lab)
   ============================== */
.ub-555-kpis{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  justify-content:flex-end;
}

.ub-555-kpi{
  min-width: 120px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
}

.ub-555-kpi .k{
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--ub-muted);
}

.ub-555-kpi .v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 14px;
  margin-top: 2px;
}

/* ==============================
   Waveform visualization
   ============================== */
.ub-555-wave{
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
  border-radius: 14px;
  padding: 12px;
}

.ub-555-wavebar{
  width: 100%;
  height: 44px; /* touch-friendly height */
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-3);
  display:flex;
}

.ub-555-wavebar .hi{
  height: 100%;
  background: linear-gradient(92deg, var(--ub-btn-grad-a), var(--ub-btn-grad-b));
}

.ub-555-wavebar .lo{
  height: 100%;
  background: rgba(0,0,0,.08);
}

html.ub-theme-dark .ub-555-wavebar .lo{
  background: rgba(255,255,255,.10);
}

.ub-555-wavelabels{
  margin-top: 10px;
  display:flex;
  justify-content:space-between;
  gap: 10px;
  flex-wrap:wrap;
  font-size: 13px;
}

.ub-555-wavelabels .tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-2);
  font-weight: 950;
  font-family: var(--ub-mono);
  margin-right: 8px;
}

/* ==============================
   Timing mini output (lab)
   ============================== */
.ub-555-miniout{
  margin-top: 12px;
  border: 1px solid var(--ub-border);
  border-radius: 14px;
  overflow:hidden;
  background: var(--ub-card-bg);
}

.ub-555-miniout .row{
  display:flex;
  justify-content:space-between;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--ub-border);
}

.ub-555-miniout .row:last-child{ border-bottom: 0; }

.ub-555-miniout .k{
  font-size: 12px;
  color: var(--ub-muted);
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.ub-555-miniout .v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 13px;
}

/* ==============================
   Inputs card tweaks (tool-only)
   ============================== */
.ub-555-form{
  margin-bottom: 0; /* nested inside main card; avoid extra spacing */
}

/* Keep inputs stacked (input then select) regardless of toolkit changes */
.ub-555-form .ub-inputrow{
  display: block !important;
}
.ub-555-form .ub-inputrow > input,
.ub-555-form .ub-inputrow > select{
  display: block !important;
  width: 100% !important;
}
.ub-555-form .ub-inputrow > select{
  margin-top: 6px;
}

/* Options row */
.ub-555-hr{
  border: none;
  border-top: 1px solid var(--ub-border);
  margin: 14px 0;
}

.ub-555-toggles{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  align-items:center;
}

/* ==============================
   Work area
   ============================== */
.ub-555-work{
  font-family: var(--ub-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap:anywhere;
}

/* ==============================
   Reference grid
   ============================== */
.ub-555-refgrid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 768px){
  .ub-555-refgrid{ grid-template-columns: 1fr; }
}

.ub-555-ref{
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-2);
  border-radius: 14px;
  padding: 12px;
}

.ub-555-ref .t{
  font-size: 12px;
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ub-muted);
  margin-bottom: 6px;
}

.ub-555-ref .f{
  font-size: 14px;
  font-weight: 900;
}

/* Make code blocks readable in both themes */
.ub-555-ref code{
  font-family: var(--ub-mono);
  font-weight: 950;
}

/* ==============================
   FAQ spacing
   ============================== */
.ub-555-q{
  margin: 12px 0 6px;
  font-size: 15px;
  font-weight: 950;
}
.ub-555-a{
  margin: 0 0 10px;
}

/* ==============================
   Small screen polish
   ============================== */
@media (max-width: 520px){
  .ub-555-kpi{ min-width: 110px; }
  .ub-555-wavebar{ height: 40px; }
  .ub-555-wavelabels{ font-size: 12px; }
}