[data-route="Lab"] { max-width: 76rem; }

mm-lab { display: block; }

.lab { color: var(--ink); }

.lab h1 { margin-bottom: 0.4rem; }

.lab-cite,
.lab-fine { color: var(--muted); font-size: 0.92rem; }

.lab-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.8rem 0 1rem;
}

.lab button,
.lab select,
.lab-tab,
.lab-key,
.lab-box,
.lab-el {
  min-height: 44px;
  min-width: 44px;
  touch-action: manipulation;
}

.lab-tab,
.lab button,
.lab select {
  font: inherit;
  border: 1px solid var(--teal);
  background: white;
  color: var(--teal-deep);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
}

.lab-tab[aria-selected="true"],
.lab button[aria-pressed="true"] {
  background: var(--teal);
  color: white;
}

.lab select { border-radius: 0.7rem; background: white; }

.lab-tool h2 {
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  margin: 0 0 0.4rem;
}

.lab-desc {
  margin: 0 0 0.8rem;
  padding: 0.75rem 0.9rem;
  background: #e7f3f1;
  border-radius: 0.8rem;
}

.lab-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  align-items: end;
  margin-bottom: 0.8rem;
}

.lab-controls label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: min(100%, 16rem);
  font-weight: 600;
}

.lab input[type="range"] {
  width: 100%;
  min-height: 44px;
  accent-color: var(--teal);
  touch-action: manipulation;
}

.lab-check {
  flex-direction: row !important;
  align-items: center;
  gap: 0.45rem !important;
  min-height: 44px;
}

.lab input[type="checkbox"] {
  width: 44px;
  height: 44px;
  margin: 0;
}

.lab-stage,
.lab-split {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
}

.lab-lewis,
.lab-svg,
.lab-spectrum,
.lab-rotate,
.lab-orbital {
  width: min(100%, 640px);
  height: auto;
  background: var(--card);
  border-radius: 1rem;
  touch-action: manipulation;
}

.lab-rotate,
.lab-spectrum { touch-action: none; cursor: grab; }

.lab-rotate:active { cursor: grabbing; }

.lab-side { flex: 1; min-width: min(100%, 16rem); }

.lab-palette,
.lab-aufbau { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.lab-key { padding: 0.2rem 0.7rem; }

.lab-msg {
  margin-top: 0.6rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0.7rem;
  background: #f3efe4;
}

.lab-msg[data-tone="ok"] { background: #e5f6ee; }
.lab-msg[data-tone="bad"] { background: #fee2e2; }
.lab-msg[data-tone="hint"] { background: #fff7e0; }

.lab-readout { font-weight: 700; }

.lab-sub { display: flex; flex-direction: column; align-items: center; gap: 0.2rem; }

.lab-boxes { display: flex; }

.lab-box {
  width: 44px;
  border: 2px solid var(--teal);
  background: white;
  color: var(--teal-deep);
  font: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  margin-right: -2px;
}

.lab-box[aria-pressed="true"] { outline: 3px solid var(--focus); }

.lab-formula {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  margin: 0.4rem 0;
}

.lab-ion {
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: white;
}

.lab-chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin: 0.15rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #e7f3f1;
  font-weight: 700;
}

.lab-chip[data-tone="neg"] { background: #fee2e2; }

.lab-plus { font-size: 1.4rem; font-weight: 700; }

.lab-formula-out {
  margin: 0;
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  font-size: 2rem;
  font-weight: 700;
}

.lab-scroll { overflow-x: auto; padding-bottom: 0.4rem; touch-action: pan-x; }

.lab-frame { position: relative; width: max-content; }

.lab-ptable {
  display: grid;
  grid-template-columns: repeat(18, 2.7rem);
  grid-auto-rows: 2.7rem;
  gap: 3px;
  width: max-content;
}

.lab-fblock { grid-template-columns: repeat(15, 2.7rem); margin-top: 0.35rem; }

.lab-el {
  border: 0;
  border-radius: 5px;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.05;
  cursor: pointer;
}

.lab-el span { font-size: 0.58rem; }
.lab-el b { font-size: 0.86rem; }

.lab-el.is-empty { background: var(--empty); color: var(--ink); }
.lab-el[aria-pressed="true"] { box-shadow: inset 0 0 0 2px var(--ink); }

.lab-marker {
  display: grid;
  place-items: center;
  font-size: 0.62rem;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 5px;
}

.lab-arrows {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.lab :focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.lab-help {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: white;
  padding: 0.15rem 0.9rem 0.7rem;
}

.lab-help summary {
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
  font-weight: 700;
  touch-action: manipulation;
}

.lab-help h3 {
  margin: 0.8rem 0 0.3rem;
  font-size: 1rem;
}

.lab-help ol { margin: 0.2rem 0 0.6rem; padding-left: 1.2rem; }

.lab-practice li { margin-bottom: 0.9rem; }

.lab-help label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-weight: 600;
  margin: 0.35rem 0;
}

.lab-help input[type="text"] {
  min-height: 44px;
  font: inherit;
  width: min(100%, 18rem);
  border: 1px solid var(--teal);
  border-radius: 0.6rem;
  padding: 0.3rem 0.6rem;
}

.lab-msg[data-tone="solution"] { background: #e7f3f1; }

.lab-h-spectrum { background: var(--card); }

@media (max-width: 720px) {
  .lab-lewis,
  .lab-svg,
  .lab-rotate,
  .lab-orbital,
  .lab-spectrum { width: 100%; }
  .lab-controls label { min-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .lab *,
  .lab *::before,
  .lab *::after {
    animation: none !important;
    transition: none !important;
  }
}