.lab {
  background: #f5f7fb;
  color: #17243a;
  font-family: system-ui, sans-serif;
  line-height: 1.6;
}
.lab main {
  max-width: 1180px;
  margin: auto;
  padding: 30px 24px 60px;
}
.lab-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 32px;
  border-bottom: 1px solid #d5ddea;
  font-size: 12px;
  letter-spacing: 0.06em;
}
.lab a {
  color: #1748a0;
}
.wordmark {
  font-weight: 800;
  letter-spacing: 0.16em;
  text-decoration: none;
}
.lab-intro {
  max-width: 740px;
  margin-bottom: 26px;
}
.lab h1 {
  font-size: clamp(40px, 6vw, 64px);
  letter-spacing: -0.045em;
  line-height: 1.08;
  margin: 8px 0 18px;
}
.lab h2 {
  font-size: 23px;
  line-height: 1.3;
  margin: 8px 0 18px;
}
.lab h3 {
  font-size: 16px;
}
.lab .eyebrow {
  font-size: 11px;
  letter-spacing: 0.13em;
  font-weight: 750;
  color: #455b7b;
}
.lab .subtle {
  color: #52627b;
  font-size: 13px;
}
.lab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.lab button {
  border: 1px solid #c3cfdf;
  background: white;
  color: #193b6e;
  padding: 10px 15px;
  border-radius: 7px;
  font: inherit;
  font-size: 14px;
  min-height: 44px;
  cursor: pointer;
}
.lab button.primary,
.lab button[aria-current='page'] {
  background: #173f85;
  color: white;
  border-color: #173f85;
}
.lab button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.lab :focus-visible {
  outline: 3px solid #bf6507;
  outline-offset: 3px;
}
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.panel {
  background: white;
  border: 1px solid #d7dfeb;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  min-width: 0;
}
.lab label {
  display: block;
  font-size: 13px;
  font-weight: 650;
  margin: 16px 0 6px;
}
.lab select,
.lab textarea,
.lab input:not([type='checkbox']) {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  padding: 12px;
  border: 1px solid #adbdd4;
  border-radius: 6px;
  background: #fbfcff;
  color: #17243a;
  font: inherit;
  font-size: 16px;
}
.lab textarea {
  resize: vertical;
}
.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  margin: 15px 0;
}
#answer,
#historical-answer {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 16px;
}
#route {
  font-size: 12px;
  font-weight: 750;
  background: #eaf1fc;
  padding: 8px 12px;
  border-radius: 5px;
}
.lab details {
  border-top: 1px solid #e0e6ef;
  padding: 12px 0;
}
.lab summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 650;
}
.lab blockquote {
  margin: 12px 0;
  padding-left: 14px;
  border-left: 3px solid #6385be;
  font-size: 14px;
  white-space: pre-wrap;
}
.hash,
.lab pre {
  font-size: 14px;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  word-break: break-word;
}
.lab pre {
  padding: 16px;
  background: #eef2f8;
  border-radius: 6px;
}
.lab .review-label {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0;
  max-width: 260px;
}
.lab input[type='checkbox'] {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}
#replay-results {
  padding-left: 24px;
  font-size: 13px;
}
#replay-results li {
  margin: 8px 0;
}
.lab table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.lab td,
.lab th {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid #dee4ed;
}
.experiment-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.metric-card {
  background: #f5f7fb;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  padding: 16px;
}
.metric-card h3 {
  overflow-wrap: anywhere;
}
.metric-card dl {
  margin: 0;
  font-size: 14px;
}
.metric-card dl > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
}
.metric-card dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
}
.lab-footer {
  padding: 25px;
  text-align: center;
  border-top: 1px solid #d5ddea;
  color: #52627b;
  font-size: 13px;
}
.lab [hidden] {
  display: none !important;
}
.skip {
  position: absolute;
  top: -80px;
  left: 12px;
  background: white;
  padding: 10px;
}
.skip:focus {
  top: 10px;
}
@media (max-width: 760px) {
  .experiment-metrics {
    grid-template-columns: 1fr;
  }
  .two-columns {
    grid-template-columns: 1fr;
  }
  .lab main {
    padding: 24px 16px;
  }
  .panel {
    padding: 18px;
  }
  .lab-header {
    padding: 16px;
  }
  .lab-header span {
    display: none;
  }
  .lab-nav button {
    flex: 1 1 44%;
  }
}