.labs-page .lab-shell-header { padding-block: 32px 40px; }
.labs-page .lab-back { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent); font-size: 0.875rem; }
.labs-page .lab-shell-header h1 { margin: 20px 0; font-size: clamp(2.25rem, 5vw, 4rem); line-height: 1.1; letter-spacing: -0.05em; }
.labs-page .lab-shell-header > p { max-width: 70ch; color: var(--text-muted); }
.labs-page .lab-context { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 24px; font-family: "IBM Plex Mono", monospace; font-size: 0.875rem; }
.labs-page .lab-context strong { color: var(--accent); font-weight: 500; }
.labs-page .lab-shell { display: grid; grid-template-columns: minmax(200px, 0.8fr) minmax(0, 3fr); gap: 24px; align-items: start; padding-bottom: 64px; }
.labs-page .lab-shell h2 { margin: 0 0 16px; font-size: 1.25rem; line-height: 1.35; letter-spacing: -0.025em; }
.labs-page .lab-shell h3 { margin: 0 0 8px; font-size: 1rem; }
.labs-page .lab-shell p { color: var(--text-muted); }
.labs-page .lab-shell p:last-child { margin-bottom: 0; }
.labs-page .lab-shell [id] { scroll-margin-top: 110px; }
.labs-page .lab-sidebar { border-top: 2px solid var(--accent); padding-top: 24px; }
.labs-page .lab-sidebar p { font-size: 0.875rem; }
.labs-page .lab-section-nav { display: grid; margin-block: 20px; }
.labs-page .lab-section-nav a { min-height: 44px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 0.875rem; }
.labs-page .lab-section-nav a:hover { color: var(--accent); }
.labs-page .lab-content { display: grid; gap: 24px; min-width: 0; }
.labs-page .lab-panel { min-width: 0; padding: 28px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface); }
.labs-page .lab-panel .lab-label { margin: 0 0 16px; color: var(--accent); font-family: "IBM Plex Mono", monospace; font-size: 0.875rem; }
.labs-page .lab-workspace { background: var(--bg-deep); border-top: 2px solid var(--accent); }
.labs-page .lab-workspace h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.labs-page .lab-workspace-note { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.labs-page .lab-detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.labs-page .lab-path { margin: 24px 0 0; padding-left: 24px; }
.labs-page .lab-path li { padding: 16px 0 16px 12px; border-top: 1px solid var(--line); }
.labs-page .lab-path li::marker { color: var(--accent); font-family: "IBM Plex Mono", monospace; }
.labs-page .lab-path p { margin: 0; }
.labs-page .lab-requirements { padding-left: 20px; color: var(--text-muted); }
.labs-page .lab-requirements li { margin-block: 8px; }
@media (max-width: 980px) {
  .labs-page .lab-shell { grid-template-columns: 1fr; }
  .labs-page .lab-section-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; }
}
@media (max-width: 720px) {
  .labs-page .lab-detail-grid { grid-template-columns: 1fr; }
  .labs-page .lab-panel { padding: 24px; }
  .labs-page .lab-shell [id] { scroll-margin-top: 180px; }
}