/* Lab-only current-work index. Shared navigation and footer remain untouched. */
.lab-page .lab-breadcrumb { width: min(100% - (2 * var(--gutter)), var(--page-max)); margin: var(--space-lg) auto; }
.lab-page .lab-breadcrumb .breadcrumb { margin: 0; }
.lab-page .lab-work { --branch-step: clamp(1rem, 3vw, 2.5rem); padding-block: 0 var(--space-xl); }
.lab-page .lab-root-heading { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 1.5rem 4rem; padding-bottom: 2rem; }
.lab-page .lab-root-heading h1 { margin: 0; font-size: clamp(3rem, 7vw, 7rem); font-weight: 400; letter-spacing: -.065em; line-height: .95; }
.lab-page .lab-introduction .section-kicker { margin-bottom: .4rem; font-size: .9rem; }
.lab-page .lab-intro { margin: 0; font-size: clamp(1.5rem, 2.5vw, 2.5rem); letter-spacing: -.035em; line-height: 1.15; }
.lab-page .lab-branches, .lab-page .lab-records { margin: 0; padding: 0; list-style: none; }
.lab-page .lab-branches { margin-left: .4rem; }
.lab-page .lab-branch { position: relative; padding: 2rem 0 2rem var(--branch-step); border-top: 1px solid var(--line); scroll-margin-top: 1.5rem; }
.lab-page .lab-branch::before { position: absolute; inset: 0 auto 0 0; border-left: 1px solid var(--line-strong); content: ""; }
.lab-page .lab-branch:last-child::before { bottom: auto; height: 2.8rem; }
.lab-page .lab-branch::after { position: absolute; top: 2.8rem; left: 0; width: calc(var(--branch-step) - .4rem); border-top: 1px solid var(--line-strong); content: ""; }
.lab-page .lab-branch:target::after, .lab-page .lab-branch:focus-within::after { border-color: var(--signal); }
.lab-page .lab-branch-heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem 1.5rem; }
.lab-page .lab-branch-heading .status { display: flex; gap: .75rem; margin: 0; font-size: .9rem; }
.lab-page .lab-number { font-variant-numeric: tabular-nums; }
.lab-page .lab-branch-heading h2 { margin: 0; font-size: clamp(1.8rem, 3vw, 2.8rem); font-weight: 400; letter-spacing: -.045em; line-height: 1.1; }
.lab-page .lab-branch-body { margin-top: 1rem; }
.lab-page .lab-description { max-width: 85ch; margin: 0; color: var(--muted); }
.lab-page .branch-links { display: flex; flex-wrap: wrap; gap: 0 1.5rem; }
.lab-page .lab-work a.text-link, .lab-page .lab-work a.external-link { min-height: 2.75rem; margin-top: .5rem; gap: .4rem; font-size: .95rem; letter-spacing: .015em; text-transform: none; }
.lab-page .lab-work a.text-link::after, .lab-page .lab-work a.external-link::after { display: none; }
.lab-page .lab-work a:hover, .lab-page .lab-work a:focus-visible { text-decoration: underline; text-underline-offset: .25em; }
.lab-page .lab-subbranch { position: relative; margin-top: 1.5rem; padding-left: var(--branch-step); border-left: 1px solid var(--line); }
.lab-page .lab-subbranch::before { position: absolute; top: .85rem; left: 0; width: calc(var(--branch-step) - .4rem); border-top: 1px solid var(--line); content: ""; }
.lab-page .lab-subbranch-heading { padding-bottom: 1rem; }
.lab-page .lab-subbranch-heading h3 { margin: 0; font-size: clamp(1.3rem, 2vw, 1.8rem); font-weight: 400; letter-spacing: -.025em; line-height: 1.25; }
.lab-page .lab-detail { scroll-margin-top: 1.5rem; }
.lab-page .lab-project { padding-block: 1.15rem; border-top: 1px solid var(--line); }
.lab-page .lab-project .lab-record { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; gap: .4rem 1rem; max-width: none; }
.lab-page .lab-project-number { grid-column: 1; grid-row: 1 / 3; color: var(--signal); font-size: .95rem; font-variant-numeric: tabular-nums; }
.lab-page .lab-project-heading { grid-column: 2; display: flex; flex-wrap: wrap; align-items: baseline; gap: .3rem 1rem; }
.lab-page .lab-version { color: var(--muted); font-size: .95rem; white-space: nowrap; }
.lab-page .lab-record h3, .lab-page .lab-record h4 { margin: 0; font-size: clamp(1.2rem, 1.7vw, 1.6rem); font-weight: 400; letter-spacing: -.025em; line-height: 1.3; }
.lab-page .lab-record > p { max-width: 85ch; margin: .65rem 0 0; color: var(--muted); }
.lab-page .lab-project .lab-record > p { grid-column: 2; margin: 0; font-size: 1rem; }
.lab-page .lab-project .branch-links { grid-column: 3; grid-row: 1 / 3; align-self: center; gap: 0 1rem; }
.lab-page .lab-project .branch-links a { margin-top: 0; }
.lab-page .lab-record .lab-record-meta { font-size: .95rem; }
.lab-page .lab-record .status { margin: 0 0 .5rem; font-size: .9rem; }
@media (max-width: 1100px) {
  .lab-page .lab-project .lab-record { grid-template-columns: 1.6rem minmax(0, 1fr); gap: .4rem .7rem; }
  .lab-page .lab-project .branch-links { grid-column: 2; grid-row: 3; }
}
@media (max-width: 680px) {
  .lab-page .lab-root-heading { gap: 1.25rem; }
  .lab-page .lab-introduction { width: 100%; }
  .lab-page .lab-branch { padding-block: 1.5rem; }
  .lab-page .lab-branch::after { top: 2.3rem; }
  .lab-page .lab-branch:last-child::before { height: 2.3rem; }
  .lab-page .lab-branch-heading { gap: .45rem; }
  .lab-page .lab-branch-heading .status { width: 100%; }
  .lab-page .lab-project .branch-links { grid-column: 1 / -1; }
  .lab-page .lab-project .lab-record { grid-template-columns: 1.3rem minmax(0, 1fr); gap: .5rem .5rem; }
  .lab-page .lab-project .branch-links { gap: 0 1rem; }
}