/* Labs share one persistent navigation and heading layout. */
body[data-lab] {
  --pad: clamp(20px, 4vw, 56px);
  --lab-site-header-height: 76px;
  --lab-navigation-height: 52px;
}

html:has(body[data-lab]) {
  scroll-padding-top: 148px;
  scrollbar-gutter: stable;
}

body[data-lab] .site-header {
  position: sticky;
  top: 0;
  z-index: 30;
}

.lab-navigation-bar {
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.lab-navigation {
  display: flex;
  justify-content: flex-start;
  align-items: stretch;
  gap: 24px;
  width: 100%;
  max-width: 1640px;
  height: var(--lab-navigation-height);
  margin: 0 auto;
  padding: 0 var(--pad);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  font: 400 13px/1.4 var(--f-mono);
}

.lab-navigation::-webkit-scrollbar {
  display: none;
}

/* Auto margin aligns the group right when it fits, without hiding the start on overflow. */
.lab-navigation > a:first-child {
  margin-left: auto;
}

.lab-navigation a {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: var(--lab-navigation-height);
  padding: 12px 0;
  border-bottom: 1px solid transparent;
  color: #999;
  text-decoration: none;
  white-space: nowrap;
}

.lab-navigation a:hover,
.lab-navigation a:focus-visible,
.lab-navigation a[aria-current="page"] {
  color: #fff;
}

.lab-navigation a[aria-current="page"] {
  border-bottom-color: #ccc;
}

.lab-navigation a:focus-visible {
  outline: 2px solid #eee;
  outline-offset: -4px;
}

body[data-lab] .shell,
body[data-lab] .study-shell {
  width: 100%;
  max-width: 1640px;
  margin-inline: auto;
  padding-inline: var(--pad);
}

body[data-lab] .lab-heading {
  display: block;
  padding: 26px 0 23px;
}

.lab-heading .study-kicker {
  margin: 0 0 12px;
  color: #999;
  font: 400 12px/1.7 var(--f-mono);
  letter-spacing: .12em;
}

.lab-heading .study-kicker a {
  color: inherit;
  text-decoration: none;
}

.lab-heading .study-kicker span {
  margin: 0 9px;
  color: #555;
}

.lab-heading h1 {
  margin: 0;
  font: 300 clamp(31px, 3.4vw, 47px)/1.15 var(--f-lat);
  letter-spacing: -.018em;
}

.lab-heading h1 b {
  font-weight: 600;
}

.lab-heading p {
  max-width: none;
  margin: 10px 0 0;
  color: #aaa;
  font: 300 14px/1.7 var(--f-ko);
}

@media (max-width: 999px) {
  body[data-lab] {
    --lab-site-header-height: 66px;
  }

  html:has(body[data-lab]) {
    scroll-padding-top: 138px;
  }

  body[data-lab] .site-links {
    max-height: calc(100dvh - var(--lab-site-header-height) - var(--lab-navigation-height) - 2px);
  }

  .lab-heading h1 {
    font-size: 36px;
  }
}

@media (max-width: 640px) {
  .lab-navigation {
    gap: 20px;
    font-size: 12px;
  }

  .lab-heading h1 {
    font-size: 32px;
  }
}

@media (max-width: 380px) {
  .lab-navigation {
    gap: 16px;
    font-size: 11px;
  }
}