/* =====================================================================
   lab - werkzeuge/klanglabor/app.css
   Oberflaeche des Klang-Labors: Tonerzeugung und Wellenbild.
   Farben nur ueber Variablen aus css/colors.css (AGENTS.md §5).
   ===================================================================== */

.lab_kl_karte {
  background: var(--ct-color);
  border: var(--lab-border);
  border-radius: 12px;
  padding: 1.1rem 1.2rem 1.25rem;
  box-shadow: var(--lab-shadow-1);
  margin-bottom: 0;
}

.lab_kl_layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: start;
  margin-bottom: 1.25rem;
}

@media (max-width: 60rem) {
  .lab_kl_layout { grid-template-columns: 1fr; }
}

/* ---------- Tonerzeugung ---------- */

.lab_kl_modus,
.lab_kl_ansicht {
  border: 0;
  padding: 0;
  margin: 0 0 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
}

.lab_kl_modus legend:not(.lab_sr_only),
.lab_kl_ansicht legend:not(.lab_sr_only) {
  position: static;
  padding: 0;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.3rem;
  width: 100%;
}

.lab_kl_ansicht { margin: 0; }

.lab_kl_wahl {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.92rem;
}

.lab_kl_frequenz { margin-bottom: 0.8rem; }

.lab_kl_frequenz label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.lab_kl_frequenz input[type="range"] { width: calc(100% - 5.5rem); vertical-align: middle; }

.lab_kl_zahl {
  width: 5rem;
  margin-left: 0.5rem;
  text-align: right;
  font-family: var(--lab-mono);
  font-size: 0.9rem;
}

.lab_kl_gruppe {
  display: block;
  font-size: 0.85rem;
  color: var(--grey600-color);
  margin-bottom: 0.25rem;
}

.lab_kl_intervalle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.8rem;
}

.lab_kl_intervalle .lab_btn { font-size: 0.85rem; padding: 0.4rem 0.65rem; }

.lab_kl_klang {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.7rem 1rem;
  margin-bottom: 1rem;
  align-items: end;
}

.lab_kl_feld {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
}
.lab_kl_feld select { margin-top: 0.25rem; font-weight: 400; }

.lab_kl_knopfzeile {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lab_kl_meldung { margin-top: 0.5rem; }

/* ---------- Wellenbild ---------- */

.lab_kl_kopfzeile {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  margin-bottom: 0.7rem;
}
.lab_kl_kopfzeile h2 { margin-bottom: 0; }

.lab_kl_buehne {
  position: relative;
  border: var(--lab-border);
  border-radius: 8px;
  background: var(--div-color);
  padding: 0.5rem;
  margin-bottom: 0.8rem;
}

.lab_kl_buehne canvas {
  display: block;
  width: 100%;
  height: 220px;
}

.lab_kl_leerhinweis {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--grey600-color);
  margin: 0;
  padding: 1rem;
  pointer-events: none;
}

.lab_kl_werte {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1rem;
  margin: 0;
  font-size: 0.92rem;
}

.lab_kl_werte dt {
  color: var(--grey600-color);
  font-size: 0.82rem;
}

.lab_kl_werte dd {
  margin: 0;
  font-family: var(--lab-mono);
  font-weight: 600;
}

/* ---------- Aufklappbare Hilfe ---------- */

details.lab_kl_hilfe {
  border: var(--lab-border);
  border-radius: 12px;
  background: var(--ct-color);
  padding: 0.7rem 1rem;
}

details.lab_kl_hilfe summary { cursor: pointer; font-weight: 600; }

details.lab_kl_hilfe ul {
  margin: 0.6rem 0 0.2rem;
  padding-left: 1.2rem;
}

details.lab_kl_hilfe li { margin-bottom: 0.35rem; }

/* ---------- Leiste: lab-Marke, Impressum, Dunkelmodus ----------
   Schmale Zeile im Karten-Look über dem Raster (Plattform-Kopf
   ausgeblendet). */
.lab_kl_leiste {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.5rem;
  margin-bottom: 1.25rem;
  background: var(--ct-color);
  border: var(--lab-border);
  border-radius: 12px;
  box-shadow: var(--lab-shadow-1);
}
.lab_kl_leiste_abstand { flex: 1 1 auto; }