/* GeoGeek Lab entry-layer optimization.
   Keep the existing instrument runtimes intact; make the collection read as an instrument lab first. */

.lab-page .nav-links a[aria-current="page"] {
  color: var(--ink);
  box-shadow: inset 0 -1px 0 var(--signal);
}

/* Keep the Lab entry header on the shared secondary-page grid.
   Field Notes, Atlas, Elsewhere, and Lab now use the same page-title geometry. */

.lab-method-note {
  max-width: 52ch;
  margin: 18px 0 0;
  color: var(--muted);
  font: 650 10px/1.45 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
}

/* Information scale is semantic, not a cartographic map denominator. */
.lab-page .scale-mode {
  color: var(--signal);
  font-weight: 750;
}

.lab-page .scale-explainer {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(290px, calc(100vw - 28px));
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  background: rgba(246,244,238,.97);
  color: var(--soft);
  box-shadow: 0 12px 28px rgba(31,35,31,.08);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity .16s ease, transform .16s ease;
  font: 600 10px/1.45 var(--mono);
  letter-spacing: .025em;
  z-index: 8;
}

.lab-page .scale-ui:hover .scale-explainer,
.lab-page .scale-ui:focus-within .scale-explainer {
  opacity: 1;
  transform: translateY(0);
}

/* Instruments are the primary Lab content. Match the shared post-title rhythm. */
.lab-instruments {
  margin-top: 38px;
}

.lab-instruments-head {
  display: grid;
  grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
  gap: clamp(30px, 4vw, 64px);
  align-items: end;
  padding: 26px 0 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-soft);
}

.lab-instruments-head > span,
.lab-builds-head > span {
  color: var(--muted);
  font: 700 11px/1.2 var(--mono);
  letter-spacing: .1em;
}

.lab-instruments-heading-copy {
  display: grid;
  gap: 10px;
}

.lab-instruments-head h2 {
  max-width: 920px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(34px, 3.2vw, 52px);
  line-height: 1;
  font-weight: 400;
  letter-spacing: -.045em;
  text-wrap: balance;
}

.lab-instruments-head p {
  max-width: 720px;
  margin: 0;
  color: var(--soft);
  font-size: 14.5px;
  line-height: 1.55;
}

.lab-instruments .lab-list {
  margin-top: clamp(34px, 4vw, 56px);
}

.lab-list .lab-group-block {
  scroll-margin-top: 92px;
}

.lab-group-purpose {
  max-width: 760px;
  margin: 11px 0 0;
  color: var(--soft);
  font-size: 13.5px;
  line-height: 1.52;
}

/* The card should announce observation conditions before the user opens it. */
.lab-card-conditions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 1px 0 2px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.lab-card-conditions > div {
  min-width: 0;
  display: grid;
  gap: 4px;
  padding: 9px 10px 9px 0;
}

.lab-card-conditions > div + div {
  padding-left: 10px;
  border-left: 1px solid var(--line-soft);
}

.lab-card-conditions dt {
  color: var(--muted);
  font: 700 8px/1.15 var(--mono);
  letter-spacing: .09em;
}

.lab-card-conditions dd {
  min-width: 0;
  margin: 0;
  color: var(--soft);
  font: 600 9.5px/1.35 var(--mono);
  letter-spacing: .02em;
  overflow-wrap: anywhere;
}

/* Make actions explicit. Record is supporting context; the instrument is primary. */
.lab-list .project-actions {
  align-items: center;
  gap: 8px;
}

.lab-list .project-link {
  border-color: transparent;
  padding-inline: 2px 7px;
  color: var(--muted);
}

.lab-list .project-link:hover,
.lab-list .project-link:focus-visible {
  color: var(--ink);
  border-color: transparent;
  text-decoration: underline;
  text-decoration-color: rgba(166,70,36,.45);
  text-underline-offset: 4px;
}

.lab-list .lab-enter {
  min-height: 38px;
  padding-inline: 12px;
  border-color: rgba(166,70,36,.34);
  color: var(--ink);
  background: rgba(166,70,36,.055);
}

.lab-list .lab-enter:hover,
.lab-list .lab-enter:focus-visible {
  border-color: var(--signal);
  background: rgba(166,70,36,.09);
}

/* Shared links such as #l10 must reveal a real location in the collection. */
.lab-list .project-card:target {
  border-color: rgba(166,70,36,.58);
  box-shadow: inset 4px 0 0 var(--signal);
}

.lab-list .project-card.is-target-reveal {
  animation: lab-target-reveal 1.4s ease both;
}

@keyframes lab-target-reveal {
  0%, 100% { background: rgba(246,244,238,.38); }
  32% { background: rgba(166,70,36,.085); }
}

/* Principle now closes the instrument collection before engineering projects begin. */
.lab-instruments .lab-principle {
  margin-top: clamp(70px, 7vw, 104px);
}

.lab-instruments .lab-principle p {
  max-width: 760px;
}

/* Open-source builds are important, but secondary to the Lab's instruments. */
.lab-page .lab-builds {
  margin-top: clamp(88px, 8vw, 128px);
}

.lab-page .lab-builds-head h2 {
  max-width: 900px;
}

.lab-page .lab-build-mark {
  width: 54px;
  height: 54px;
  background: rgba(246,244,238,.64);
}

.lab-page .lab-build-mark img {
  filter: saturate(.48) contrast(.94);
  opacity: .86;
  transition: filter .18s ease, opacity .18s ease, transform .18s ease;
}

.lab-page .lab-build-row:hover .lab-build-mark img,
.lab-page .lab-build-row:focus-visible .lab-build-mark img {
  filter: saturate(1) contrast(1);
  opacity: 1;
  transform: scale(1.025);
}

/* Workspace identity. */
.instrument-breadcrumb {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 7px;
  color: var(--lab-workspace-faint, #727f76);
  font: 700 8px/1 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.instrument-breadcrumb span + span::before {
  content: "/";
  margin-right: 7px;
  color: rgba(220,228,222,.3);
}

.instrument-workspace-modes button[data-mode-help] {
  position: relative;
}

/* Existing native title tooltips carry the explanation without adding persistent chrome. */
.instrument-dialog[data-lab-workspace="true"] .instrument-close[aria-keyshortcuts="Escape"] {
  cursor: pointer;
}

@media (max-width: 980px) {
  .lab-instruments-head,
  .lab-builds-head {
    grid-template-columns: 1fr;
    gap: 12px;
    align-items: start;
  }

  .lab-group-observatory .project-grid,
  .lab-group-studies .project-grid,
  .lab-group-play .project-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

  .lab-page .lab-build-row {
    grid-template-columns: 64px minmax(160px, .62fr) minmax(0, 1fr);
  }

  .lab-page .lab-build-open {
    grid-column: 2 / -1;
    justify-self: start;
  }
}

@media (max-width: 680px) {
  .lab-method-note {
    margin-top: 14px;
  }

  .lab-instruments {
    margin-top: 32px;
  }

  .lab-instruments-head,
  .lab-builds-head {
    padding-block: 18px 20px;
  }

  .lab-group-observatory .project-grid,
  .lab-group-studies .project-grid,
  .lab-group-play .project-grid {
    grid-template-columns: 1fr;
  }

  .lab-list .project-visual {
    aspect-ratio: 16 / 9.5;
  }

  .lab-list .project-copy {
    padding: 18px;
  }

  .lab-list .project-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
  }

  .lab-list .project-cta {
    min-height: 44px;
    justify-content: space-between;
  }

  .lab-list .project-link {
    padding-inline: 0;
  }

  .lab-card-conditions {
    grid-template-columns: 1fr;
  }

  .lab-card-conditions > div + div {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-soft);
  }

  .lab-page .lab-build-row {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 12px 14px;
    padding-block: 16px;
  }

  .lab-page .lab-build-row p,
  .lab-page .lab-build-open {
    grid-column: 2;
  }

  .lab-page .lab-build-mark {
    width: 46px;
    height: 46px;
    align-self: start;
  }

  .lab-page .scale-explainer {
    right: -2px;
    width: min(270px, calc(100vw - 20px));
  }

  .instrument-breadcrumb {
    margin-bottom: 5px;
    font-size: 7.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-list .project-card.is-target-reveal,
  .lab-page .lab-build-mark img,
  .lab-page .scale-explainer {
    animation: none !important;
    transition: none !important;
  }
}