.lab-shell {
  --lab-ink: #132f2c;
  --lab-green: #195e4f;
  --lab-soft: #eef4ee;
  --lab-line: #d4dfd8;
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr);
  max-width: 1800px;
  margin: auto;
  color: var(--lab-ink);
  font-size: 18px;
  line-height: 1.55;
}
.lab-shell h1,
.lab-shell h2,
.lab-shell h3 {
  color: var(--lab-ink);
  letter-spacing: -0.025em;
}
.lab-shell h1 {
  font-size: clamp(30px, 3vw, 44px);
  margin: 0 0 12px;
}
.lab-shell h2 {
  font-size: 27px;
  margin: 0 0 14px;
}
.lab-shell h3 {
  font-size: 21px;
  margin: 0 0 8px;
}
.lab-shell p {
  margin: 0 0 14px;
}
.lab-sidebar {
  background: #f4f6f2;
  border-right: 1px solid var(--lab-line);
  padding: 26px 18px;
}
.lab-brand {
  font-size: 26px;
  font-weight: 750;
  text-decoration: none;
  display: block;
  margin: 0 12px 24px;
  color: var(--lab-green);
}
.lab-brand span {
  display: block;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.09em;
  margin-top: 6px;
}
.lab-sidebar nav {
  display: grid;
  gap: 4px;
}
.lab-sidebar nav a {
  display: flex;
  gap: 13px;
  padding: 10px 12px;
  text-decoration: none;
  border-radius: 6px;
  color: #344d45;
  font-size: 16px;
  font-weight: 600;
}
.lab-sidebar nav a span {
  font-size: 12px;
  align-self: center;
  color: #62776d;
}
.lab-sidebar nav a:hover,
.lab-sidebar nav a[aria-current] {
  background: #dfe9dd;
  color: #123f33;
}
.sidebar-foot {
  border-top: 1px solid var(--lab-line);
  margin-top: 24px;
  padding: 20px 12px;
  font-size: 14px;
}
.sidebar-foot a {
  display: block;
  margin-bottom: 14px;
  color: var(--lab-green);
}
.lab-workspace {
  padding: 25px clamp(20px, 3vw, 48px);
  min-width: 0;
}
.lab-breadcrumb {
  font-size: 14px;
  border-bottom: 1px solid var(--lab-line);
  padding-bottom: 15px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.lab-breadcrumb span {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.12em;
}
.lab-breadcrumb a {
  color: var(--lab-green);
}
.workspace-heading {
  padding: 24px 0 12px;
}
.lab-kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--lab-green);
}
.workspace-heading > p:last-child {
  max-width: 850px;
  font-size: 19px;
}
.lab-panel {
  padding: 22px;
  border: 1px solid var(--lab-line);
  border-radius: 10px;
  background: white;
  margin: 18px 0;
  min-width: 0;
}
.lab-panel.soft {
  background: #f3f6ef;
}
.lab-panel.dark {
  background: #143c32;
  color: #eff6e8;
  border: none;
}
.lab-panel.dark h2,
.lab-panel.dark h3,
.lab-panel.dark a {
  color: #eff6e8;
}
.lab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.lab-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.lab-grid > .lab-panel {
  margin: 0;
}
.lab-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 16px 0;
}
.lab-shell button,
.lab-button {
  font-weight: 600;
  line-height: 1.3;
  font-family: inherit;
  font-size: 16px;
  border: 1px solid #b4c7ba;
  border-radius: 6px;
  padding: 11px 16px;
  background: #f3f6ef;
  color: #173b2e;
  cursor: pointer;
  min-height: 44px;
  text-decoration: none;
  display: inline-block;
}
.lab-shell button.primary,
.lab-button.primary {
  background: #195e4f;
  color: #fff;
  border-color: #195e4f;
}
.lab-shell button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.lab-shell a {
  color: #195e4f;
}
.lab-shell input,
.lab-shell select,
.lab-shell textarea {
  font: inherit;
  color: #19352d;
  border: 1px solid #a8bdb2;
  border-radius: 5px;
  padding: 10px;
  background: white;
  max-width: 100%;
  width: 100%;
  min-height: 44px;
}
.lab-shell textarea {
  min-height: 130px;
}
.lab-shell label {
  display: block;
  font-size: 15px;
  font-weight: 650;
  margin: 10px 0 6px;
}
.lab-shell input[type="checkbox"] {
  width: 20px;
  min-height: 20px;
  vertical-align: middle;
  margin-right: 8px;
}
.lab-shell input[type="range"] {
  padding: 0;
}
.lab-controls {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  align-items: end;
}
.lab-controls > div {
  flex: 1;
  min-width: 150px;
}
.lab-muted,
.lab-caption {
  color: #5b6e64;
  font-size: 15px;
}
.lab-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 5px 8px;
  background: #e9f0e2;
  border-radius: 4px;
  display: inline-block;
  margin: 0 5px 6px 0;
  color: #365141;
}
.lab-shell details {
  border-top: 1px solid var(--lab-line);
  padding: 14px 0;
}
.lab-shell summary {
  font-weight: 650;
  cursor: pointer;
  min-height: 30px;
}
.lab-shell details > div,
.lab-shell details > p {
  margin-top: 12px;
}
.lab-shell pre {
  background: #102c27;
  color: #f1f7ed;
  padding: 18px;
  border-radius: 7px;
  overflow: auto;
  font:
    14px/1.6 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.lab-shell code {
  font-size: 0.87em;
  overflow-wrap: anywhere;
}
.lab-shell textarea.code-editor {
  font:
    15px/1.6 ui-monospace,
    SFMono-Regular,
    monospace;
  min-height: 250px;
  tab-size: 4;
}
.lab-table {
  overflow: auto;
  max-width: 100%;
  border: 1px solid var(--lab-line);
  border-radius: 7px;
  margin: 15px 0;
}
.lab-shell table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.lab-shell th,
.lab-shell td {
  text-align: left;
  border-bottom: 1px solid var(--lab-line);
  padding: 12px;
  vertical-align: top;
  min-width: 90px;
  max-width: 360px;
  overflow-wrap: anywhere;
}
.lab-shell th {
  background: #edf2e8;
  white-space: nowrap;
}
.lab-shell td details {
  border: 0;
  padding: 0;
}
.lab-shell td summary {
  font-weight: 400;
}
.lab-list {
  display: grid;
  gap: 8px;
}
.lab-list a,
.lesson-row {
  padding: 15px 18px;
  border: 1px solid var(--lab-line);
  border-radius: 7px;
  text-decoration: none;
  display: flex;
  gap: 16px;
  align-items: center;
  color: #1b3d31;
  background: #fff;
}
.lab-list a:hover {
  background: #f2f6ed;
}
.lesson-row .number {
  font-size: 14px;
  color: #66816d;
}
.lesson-row b {
  display: block;
}
.lesson-row small {
  color: #65756a;
  display: block;
  font-size: 14px;
}
.lesson-row .arrow {
  margin-left: auto;
}
.lab-notice {
  background: #edf4e4;
  border-left: 4px solid #719453;
  padding: 15px 18px;
  margin: 15px 0;
  font-size: 16px;
}
.lab-error {
  background: #fff0e8;
  border-color: #b66533;
}
.lab-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.lab-steps span {
  background: #edf2e8;
  padding: 9px 12px;
  border-radius: 5px;
  font-size: 14px;
}
.lab-stat {
  font-size: 34px;
  font-weight: 700;
  display: block;
}
.lab-bottom {
  border-top: 1px solid var(--lab-line);
  margin-top: 30px;
  padding-top: 20px;
  display: flex;
  gap: 15px;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: 14px;
}
.lab-meter {
  width: 100%;
  height: 16px;
  accent-color: #286f52;
}
.lab-chart {
  display: block;
  width: 100%;
  height: auto;
  max-height: 250px;
  background: #f3f6ef;
  border-radius: 8px;
}
.lab-chart text {
  font-size: 12px;
  fill: #344c40;
}
.lab-chart path,
.lab-chart polyline {
  fill: none;
  stroke: #237357;
  stroke-width: 3;
}
.lab-chart circle {
  fill: #237357;
}
.lab-chart .second {
  stroke: #b76a35;
}
.lab-answer {
  padding: 15px;
  border: 1px solid #b3c7b6;
  border-radius: 7px;
}
.lab-checks {
  display: grid;
  gap: 5px;
}
.lab-checks label {
  font-weight: 400;
  font-size: 17px;
}
#lab-toast {
  position: fixed;
  bottom: 16px;
  right: 16px;
  max-width: 90vw;
  background: #143c32;
  color: #fff;
  padding: 0;
  border-radius: 6px;
  z-index: 20;
}
#lab-toast:not(:empty) {
  padding: 12px 20px;
}
.lab-shell :focus-visible {
  outline: 3px solid #ba762d;
  outline-offset: 3px;
}
.lab-shell .tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--lab-line);
  padding-bottom: 12px;
  margin: 12px 0;
}
.lab-shell .tabs button[aria-pressed="true"] {
  background: #195e4f;
  color: #fff;
}
.lab-source {
  font-size: 14px;
  overflow-wrap: anywhere;
}
.lab-shell ol,
.lab-shell ul {
  padding-left: 23px;
}
.lab-shell li {
  margin-bottom: 7px;
}
.lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 20px;
}
.lab-shell svg {
  max-width: 100%;
}
.lab-node {
  padding: 16px;
  background: #edf4e8;
  border: 1px solid #b9cdb9;
  border-radius: 8px;
  text-align: center;
  margin: 8px 0;
}
.lab-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.lab-flow .lab-node {
  font-size: 16px;
}
.site-header .container {
  max-width: 1760px;
}
.site-header #navigation > a {
  font-size: 14px;
}
@media (min-width: 1500px) {
  .lab-grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 1100px) {
  .lab-shell {
    grid-template-columns: 220px minmax(0, 1fr);
  }
  .lab-grid.three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .lab-layout {
    grid-template-columns: 1fr;
  }
  .lab-sidebar {
    padding: 22px 10px;
  }
}
@media (max-width: 760px) {
  .lab-shell {
    display: block;
  }
  .lab-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--lab-line);
    padding: 12px 16px;
  }
  .lab-brand {
    font-size: 21px;
    margin: 0 0 10px;
  }
  .lab-brand span {
    display: inline;
    font-size: 10px;
    margin-left: 8px;
  }
  .lab-sidebar nav {
    display: flex;
    overflow: auto;
    padding-bottom: 7px;
  }
  .lab-sidebar nav a {
    white-space: nowrap;
    font-size: 14px;
    padding: 9px 12px;
  }
  .lab-sidebar nav a span {
    display: none;
  }
  .sidebar-foot {
    display: none;
  }
  .lab-workspace {
    padding: 18px 16px;
  }
  .lab-grid,
  .lab-grid.three,
  .lab-flow {
    grid-template-columns: 1fr;
  }
  .lab-panel {
    padding: 17px;
  }
  .workspace-heading {
    padding-top: 18px;
  }
  .lab-shell h1 {
    font-size: 32px;
  }
  .lab-shell h2 {
    font-size: 25px;
  }
  .lab-shell pre {
    font-size: 13px;
  }
  .lab-breadcrumb span {
    display: none;
  }
}
.lab-panel.dark .lab-kicker {
  color: #cadbb4;
}
.lab-panel.dark .lab-button {
  color: #173b2e;
}
.lab-panel.dark .lab-button.primary {
  color: #fff;
}
@media (max-width: 760px) {
  .lab-sidebar nav {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 6px;
  }
  .lab-sidebar nav a {
    flex: 0 0 auto;
  }
  .lab-sidebar {
    max-width: 100%;
    overflow: hidden;
  }
}