.lab-banner {
  padding: 38px;
  border: 1px solid var(--line);
  background: var(--surface);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.lab-banner:after {
  content: "⊕";
  position: absolute;
  right: 6%;
  top: -45px;
  font-size: 260px;
  color: var(--green);
  opacity: 0.08;
  pointer-events: none;
}
.lab-banner h2 {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.2;
  margin: 18px 0;
}
.lab-banner em {
  font-style: normal;
  color: var(--green);
}
.lab-banner p {
  max-width: 640px;
  color: var(--muted);
  line-height: 1.9;
}
.lab-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.lab-card {
  background: var(--surface);
  border: 1px solid var(--line);
  transition:
    transform 0.2s,
    border-color 0.2s;
  overflow: hidden;
}
.lab-card:hover {
  transform: translateY(-4px);
  border-color: var(--green);
}
.lab-card > div:last-child {
  padding: 24px;
}
.lab-card h2 {
  font-size: 23px;
  margin: 15px 0;
}
.lab-card p,
.lab-part-card p {
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 22px;
}
.lab-art {
  height: 160px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: radial-gradient(
    ellipse at center,
    var(--green-soft),
    var(--surface-solid)
  );
}
.lab-art > span {
  font-size: 100px;
  line-height: 1;
  color: var(--green);
  text-shadow: 0 0 24px color-mix(in srgb, var(--green) 35%, transparent);
}
.lab-art small {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
}
.lab-art i {
  position: absolute;
  width: 110px;
  height: 110px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: rotate(35deg) scaleX(1.7);
}
.lab-art i:nth-of-type(2) {
  transform: rotate(-35deg) scaleX(1.7);
}
.lab-art i:nth-of-type(3) {
  transform: rotate(90deg) scaleX(1.7);
}
.art-network {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 30px 30px;
}
.art-wave i {
  border-radius: 40%;
  width: 160px;
  animation: lab-spin 12s linear infinite;
}
.art-particle i {
  border-style: dashed;
}
.lab-parts {
  display: grid;
  gap: 18px;
}
.lab-part-card {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color 0.2s;
}
.lab-part-card:hover {
  border-color: var(--green);
}
.lab-part-number {
  font-size: 44px;
  color: var(--green);
  opacity: 0.55;
}
.lab-part-card > div {
  flex: 1;
}
.lab-part-card h2 {
  margin: 14px 0;
  font-size: 23px;
}
.lab-part-card p {
  margin-bottom: 0;
}
.lab-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 20px;
}
.lab-workbench {
  background: var(--surface-solid);
  border: 1px solid var(--line);
  min-width: 0;
}
.lab-window-head {
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.lab-modes {
  display: flex;
  gap: 8px;
}
.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
}
.lab-visual {
  padding: 18px;
  min-width: 0;
}
.lab-controls {
  border-left: 1px solid var(--line);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}
.lab-control {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 12px;
  color: var(--text);
}
.lab-range {
  display: flex;
  gap: 12px;
  align-items: center;
}
.lab-range input {
  width: 100%;
  min-width: 0;
  accent-color: var(--green);
  cursor: pointer;
}
.lab-range output {
  font-size: 11px;
  min-width: 40px;
  text-align: right;
  color: var(--green);
}
.lab-control select,
.lab-control input[type="search"],
.lab-share input {
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 10px;
  font: inherit;
  width: 100%;
  min-width: 0;
}
.lab-control-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.lab-tip {
  font-size: 11px;
  line-height: 1.8;
  color: var(--muted);
}
.lab-canvas-wrap {
  min-width: 0;
  overflow: hidden;
}
.lab-canvas-wrap canvas {
  width: 100%;
  aspect-ratio: 8/5;
  display: block;
  touch-action: none;
  border: 1px solid var(--line);
}
.lab-canvas-wrap canvas[hidden] {
  display: none;
}
.lab-readouts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 15px 0;
  font-size: 10px;
  color: var(--muted);
}
.lab-readouts span {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 85px;
}
.lab-readouts strong {
  color: var(--text);
  font-size: 16px;
}
.lab-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.lab-toolbar .btn {
  font-size: 11px;
  padding: 10px 15px;
}
.lab-status {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.7;
  min-height: 19px;
  margin-top: 14px;
}
.lab-share {
  margin-top: 15px;
}
.lab-share label {
  font-size: 11px;
  display: grid;
  gap: 10px;
}
.lab-challenge {
  padding: 22px;
  border-bottom: 1px solid var(--line);
  background: var(--green-soft);
}
.lab-challenge[hidden] {
  display: none;
}
.lab-challenge h2 {
  font-size: 20px;
  margin: 12px 0;
}
.lab-challenge p {
  font-size: 12px;
  line-height: 1.8;
  max-width: 850px;
}
.lab-challenge progress {
  width: 100%;
  height: 9px;
  accent-color: var(--green);
  margin: 15px 0;
}
.lab-challenge-result {
  display: block;
  min-height: 18px;
  font-size: 12px;
  color: var(--green);
}
.lab-challenge.complete {
  box-shadow: inset 3px 0 var(--green);
}
.lab-explanation,
.lab-related {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  margin: 14px 0;
}
.lab-explanation h2,
.lab-related h2 {
  font-size: 20px;
  margin: 16px 0;
}
.lab-explanation p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
  max-width: 900px;
}
.lab-explanation .btn-text {
  margin: 12px 24px 0 0;
  display: inline-flex;
}
.lab-related > a {
  display: block;
  font-size: 11px;
  margin-top: 14px;
  color: var(--muted);
}
.element-detail {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.element-detail h3 {
  margin: 15px 0;
  font-size: 20px;
}
.element-detail h3 span {
  color: var(--green);
}
.element-detail p {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}
.atom-config {
  overflow-wrap: anywhere;
}
.periodic-scroll {
  overflow-x: auto;
  max-width: 100%;
  padding-bottom: 12px;
}
.periodic-table {
  display: grid;
  grid-template-columns: repeat(18, minmax(34px, 1fr));
  grid-template-rows: repeat(7, 53px) 16px repeat(2, 53px);
  gap: 3px;
  min-width: 670px;
}
.element-cell {
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--green-soft);
  padding: 4px 2px;
  text-align: center;
  cursor: pointer;
}
.element-cell small {
  display: block;
  font-size: 8px;
  color: var(--muted);
}
.element-cell strong {
  font-size: 15px;
}
.element-cell:hover,
.element-cell[aria-pressed="true"] {
  border-color: var(--green);
  box-shadow: inset 0 0 0 1px var(--green);
  background: var(--bg);
}
.element-dim {
  opacity: 0.2;
}
.element-series {
  font-size: 7px;
  display: grid;
  place-items: center;
  color: var(--muted);
}
@keyframes lab-spin {
  to {
    transform: rotate(395deg) scaleX(1.7);
  }
}
@media (max-width: 1100px) {
  .lab-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .lab-grid {
    grid-template-columns: minmax(0, 1fr) 245px;
  }
  .lab-controls {
    padding: 18px;
  }
  .nav a {
    font-size: 9px;
    padding-inline: 6px;
  }
}
@media (max-width: 760px) {
  .lab-grid {
    grid-template-columns: 1fr;
  }
  .lab-controls {
    border-left: 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .lab-controls .lab-tip,
  .lab-control-actions,
  .element-detail {
    grid-column: 1/-1;
  }
  .lab-banner {
    padding: 26px;
  }
  .lab-card > div:last-child {
    padding: 20px;
  }
  .lab-part-card {
    padding: 22px;
    gap: 18px;
  }
  .lab-part-number {
    font-size: 30px;
  }
  .lab-window-head {
    padding: 12px;
    flex-wrap: wrap;
  }
  .lab-window-head > .eyebrow {
    font-size: 9px;
  }
  .lab-visual {
    padding: 12px;
  }
}
@media (max-width: 500px) {
  .lab-cards {
    grid-template-columns: 1fr;
  }
  .lab-part-card h2 {
    font-size: 18px;
  }
  .lab-part-card .eyebrow {
    font-size: 8px;
  }
  .lab-controls {
    grid-template-columns: 1fr;
  }
  .lab-banner h2 {
    font-size: 28px;
  }
  .lab-part-card {
    align-items: flex-start;
  }
  .lab-part-card > svg {
    display: none;
  }
  .lab-modes .filter {
    font-size: 10px;
  }
  .lab-tabs .filter {
    font-size: 10px;
    padding: 9px;
  }
  .lab-toolbar .btn {
    padding: 9px 12px;
    font-size: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .lab-art i {
    animation: none;
  }
  .lab-card {
    transition: none;
  }
}