/* Lab journeys share the established premium portal palette and type system. */
html { scroll-behavior: auto; }
.lab-index,
.lab-journey {
  --lab-ink: var(--portal-ink, #10283f);
  --lab-muted: var(--portal-muted, #506276);
  --lab-line: var(--portal-line, #d8d1c5);
  --lab-paper: var(--portal-paper, #f5f1e8);
  --lab-white: var(--portal-white, #fffefa);
  --lab-blue: var(--portal-blue, #1a62c6);
  --lab-rust: var(--portal-rust, #ad5b3b);
  --lab-green: var(--portal-green, #216047);
  color: var(--lab-ink);
}

.lab-index *, .lab-journey * { box-sizing: border-box; }
.lab-index a, .lab-journey a { color: var(--lab-blue); text-underline-offset: 3px; }
.lab-index :focus-visible, .lab-journey :focus-visible { outline: 3px solid var(--lab-blue); outline-offset: 3px; }
.lab-index img, .lab-journey img, .lab-index svg, .lab-journey svg { max-width: 100%; height: auto; }
.lab-index [hidden], .lab-journey [hidden] { display: none !important; }
.lab-eyebrow {
  margin: 0 0 13px;
  color: var(--lab-rust);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}

/* Portal index: each stage reveals the same evolving system. */
.lab-index-world, .lab-world { margin: 20px 0 0; }
.lab-index-hero {
  position: relative;
  overflow: hidden;
  min-height: 330px;
  padding: clamp(30px, 5vw, 74px) clamp(24px, 5vw, 72px);
  margin: 22px 0 35px;
  border: 1px solid var(--lab-line);
  border-radius: 22px;
  background: radial-gradient(circle at 91% 22%, #dceaf6 0, transparent 28%),
              linear-gradient(126deg, var(--lab-white) 0%, #f1ede3 100%);
}
.lab-index-hero::after {
  content: "01  /  06";
  position: absolute;
  right: 6%;
  bottom: 18%;
  color: #c5d7e5;
  font: italic clamp(70px, 13vw, 190px)/1 Georgia, serif;
  pointer-events: none;
}
.lab-index-hero > * { position: relative; z-index: 1; }
.lab-index-hero h1 {
  margin: 0;
  font: 400 clamp(43px, 6vw, 82px)/1.02 Georgia, serif;
  letter-spacing: -.045em;
}
.lab-index-hero h1 em { color: var(--lab-blue); font-style: normal; }
.lab-index-hero p:not(.lab-eyebrow) { max-width: 620px; color: var(--lab-muted); font-size: clamp(16px, 1.7vw, 20px); }
.lab-index-start,
.lab-start-link,
.lab-project-link,
.lab-step-next {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 12px 20px;
  border: 1px solid var(--lab-blue);
  border-radius: 8px;
  background: var(--lab-blue);
  color: white !important;
  font-weight: 700;
  text-decoration: none;
}
.lab-index-start span, .lab-start-link span, .lab-project-link span { font-size: 20px; }
.lab-index-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 0 0 16px;
  border-bottom: 1px solid var(--lab-line);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.lab-index-heading span:last-child { color: var(--lab-muted); }
.lab-index-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; margin: 20px 0 36px; }
.lab-index-card { min-width: 0; border: 1px solid var(--lab-line); border-radius: 14px; background: var(--lab-white); overflow: hidden; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.lab-index-card:hover { transform: translateY(-4px); border-color: var(--lab-blue); box-shadow: 0 14px 34px #10283f13; }
.lab-index-card { display: flex; flex-direction: column; }
.lab-index-card-copy { display: flex; flex: 1; flex-direction: column; }
.lab-index-card-visual { display: grid; place-items: center; height: 190px; padding: 12px; overflow: hidden; background: #e7eef7; border-bottom: 1px solid var(--lab-line); }
.lab-index-card-visual figure { width: 100%; height: 100%; margin: 0; }
.lab-index-card-visual img, .lab-index-card-visual svg { display: block; width: 100%; height: 100%; object-fit: contain; }
.lab-index-card-visual figcaption { display: none; }
.lab-index-card-meta { display: flex; justify-content: space-between; gap: 10px; padding: 18px 20px 0; color: var(--lab-rust); font-size: 11px; font-weight: 800; letter-spacing: .06em; }
.lab-index-card-meta span { color: var(--lab-muted); font-weight: 500; letter-spacing: 0; text-align: right; }
.lab-index-card h2 { margin: 9px 20px 0; font: 700 clamp(19px, 1.8vw, 24px)/1.2 Georgia, serif; }
.lab-index-card h2 a { color: var(--lab-ink); text-decoration: none; }
.lab-index-card h2 a:hover { color: var(--lab-blue); }
.lab-index-card-addition { display: block; flex: 1; margin: 0; padding: 10px 20px 22px; color: var(--lab-muted); font-size: 14px; }
.lab-index-card-action { display: flex; justify-content: space-between; padding: 12px 20px; border-top: 1px solid var(--lab-line); color: var(--lab-blue); font-size: 13px; font-weight: 800; text-decoration: none; }
.lab-index-footer { padding: 26px 30px; border-radius: 14px; background: var(--lab-ink); color: white; }
.lab-index-footer strong { font: 700 25px/1.2 Georgia, serif; }
.lab-index-footer p { margin: 8px 0 12px; color: #d2deec; }
.lab-index-footer a { color: #a8d8ff; font-weight: 700; }

/* The course rail and cover orient a learner before any terminal work. */
.lab-course-rail { display: flex; flex-wrap: wrap; gap: 5px; margin: 20px 0 28px; padding-bottom: 12px; border-bottom: 1px solid var(--lab-line); }
.lab-course-rail a { padding: 7px 13px; border-radius: 6px; color: var(--lab-muted); font-size: 12px; font-weight: 700; text-decoration: none; }
.lab-course-rail a:hover, .lab-course-rail a[aria-current] { background: var(--lab-ink); color: white; }
.lab-cover { display: grid; grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr); gap: clamp(24px, 3vw, 48px); align-items: start; padding: 12px 0 40px; border-bottom: 1px solid var(--lab-line); }
.lab-cover-copy h1 { margin: 0 0 16px; font: 400 clamp(37px, 4.3vw, 64px)/1.04 Georgia, serif; letter-spacing: -.035em; }
.lab-cover-copy > .lab-eyebrow { margin-top: 8px; }
.lab-cover-copy > p:not(.lab-eyebrow), .lab-source-where p { max-width: 640px; color: var(--lab-muted); }
.lab-source-where { margin: 22px 0; padding: 16px 20px; border-left: 3px solid var(--lab-rust); background: #f5e5d9; }
.lab-source-where .lab-eyebrow { margin-bottom: 7px; }
.lab-source-where h2 { margin: 0 0 6px; font: 700 20px/1.2 Georgia, serif; }
.lab-source-where p { margin: 0; font-size: 15px; }
.lab-mission { margin: 26px 0; }
.lab-mission h2 { margin: 0 0 8px; font: 700 25px/1.2 Georgia, serif; }
.lab-mission p:not(.lab-eyebrow) { margin: 0; font-size: 17px; line-height: 1.55; }
.lab-cover-architecture { min-width: 0; padding: 16px; border: 1px solid var(--lab-line); border-radius: 16px; background: var(--lab-white); }
.lab-cover-architecture > figure, .lab-cover-architecture > .hero { margin: 0; }
.lab-cover-architecture img, .lab-cover-architecture svg { display: block; width: 100%; max-height: 440px; object-fit: contain; }
.lab-cover-architecture figcaption { margin-top: 8px; color: var(--lab-muted); font-size: 12px; }
.lab-source-image { margin-top: 13px; border-top: 1px solid var(--lab-line); padding-top: 10px; }
.lab-source-image summary { color: var(--lab-blue); font-size: 12px; font-weight: 700; cursor: pointer; }
.lab-source-image h2 { margin: 13px 0 5px; font-size: 19px; }
.lab-source-image img { max-height: 330px; }
.lab-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: clamp(22px, 3vw, 48px); }
.lab-section-nav { align-self: start; position: sticky; top: 20px; display: flex; flex-direction: column; margin-top: 25px; padding: 10px 0; border-left: 1px solid var(--lab-line); }
.lab-section-nav a { display: flex; gap: 10px; align-items: center; padding: 8px 12px; border-left: 2px solid transparent; color: var(--lab-muted); font-size: 12px; line-height: 1.3; text-decoration: none; }
.lab-section-nav a:hover, .lab-section-nav a[aria-current] { border-left-color: var(--lab-blue); color: var(--lab-blue); background: #e7eef7; }
.lab-section-nav span { color: var(--lab-rust); font: italic 18px/1 Georgia, serif; }
.lab-content-column { min-width: 0; }
.lab-section { padding: 44px 0; border-bottom: 1px solid var(--lab-line); scroll-margin-top: 20px; }
.lab-section h2 { font: 700 clamp(24px, 2.8vw, 35px)/1.15 Georgia, serif; letter-spacing: -.02em; }
.lab-section h3 { font: 700 21px/1.25 Georgia, serif; }
.lab-section p, .lab-section li { line-height: 1.6; }
.lab-section p { margin: 11px 0; }
.lab-section li { margin: 7px 0; }
.lab-section pre, .lab-engineer-reference pre { position: relative; max-width: 100%; margin: 14px 0 20px; padding: 19px; overflow-x: auto; border: 1px solid #d0dce6; border-radius: 10px; background: #edf3f7; color: #10314d; font: 13px/1.58 "SFMono-Regular", Consolas, monospace; tab-size: 2; }
.lab-section pre code, .lab-engineer-reference pre code { white-space: pre; overflow-wrap: normal; }
.lab-section code:not(pre code), .lab-engineer-reference code:not(pre code) { overflow-wrap: anywhere; }
.lab-section table, .lab-engineer-reference table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; }
.lab-section th, .lab-section td, .lab-engineer-reference th, .lab-engineer-reference td { padding: 9px 11px; border-bottom: 1px solid var(--lab-line); text-align: left; vertical-align: top; }
.lab-section details summary { cursor: pointer; }

/* Context shows one execution location while retaining the source prerequisites. */
.lab-environment-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr); gap: 20px; }
.lab-prereqs, .lab-execution { min-width: 0; padding: 18px 22px; border: 1px solid var(--lab-line); border-radius: 12px; background: var(--lab-white); }
.lab-prereqs summary { font: 700 19px/1.3 Georgia, serif; }
.lab-prereq-source h2 { margin: 18px 0 10px; font-size: 22px; }
.lab-prereq-source ul { padding-left: 22px; }
.lab-context-card { display: flex; gap: 14px; }
.lab-context-card + .lab-context-card { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--lab-line); }
.lab-context-icon { display: grid; flex: none; place-items: center; width: 33px; height: 33px; border-radius: 8px; background: #e7eef7; color: var(--lab-blue); font-size: 20px; }
.lab-context-card strong { font: 700 19px/1.2 Georgia, serif; }
.lab-context-card p { margin: 6px 0 0; color: var(--lab-muted); font-size: 14px; }
.lab-engineer-context { margin-top: 15px !important; padding: 12px; border-left: 3px solid var(--lab-rust); background: #f5e5d9; font-size: 13px; }
.lab-setup-link { display: inline-block; margin-top: 19px; font-size: 13px; font-weight: 700; }

/* Work stepper. JavaScript hides inactive panels; the source is fully visible without it. */
.lab-work-intro { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 25px; align-items: end; margin-bottom: 20px; }
.lab-work-intro h2 { margin: 0 0 7px; font: 400 clamp(28px, 3.5vw, 44px)/1.08 Georgia, serif; }
.lab-work-intro p:last-child { max-width: 660px; margin: 0; color: var(--lab-muted); font-size: 15px; }
.lab-progress-card { padding: 14px; border: 1px solid var(--lab-line); border-radius: 9px; background: var(--lab-white); }
.lab-progress-card strong { display: block; color: var(--lab-blue); font: 700 27px/1 Georgia, serif; }
.lab-progress-card > span { color: var(--lab-muted); font-size: 12px; }
.lab-progress-card small { display: block; margin-top: 8px; color: var(--lab-muted); font-size: 10px; line-height: 1.3; }
.lab-progress-card button { margin-top: 9px; padding: 0; border: 0; background: none; color: var(--lab-blue); font: 700 11px/1.3 Arial, sans-serif; text-decoration: underline; cursor: pointer; }
.lab-progress-track { height: 5px; margin-top: 10px; border-radius: 9px; background: #d6e0e8; overflow: hidden; }
.lab-progress-track span { display: block; width: 0; height: 100%; background: var(--lab-green); transition: width .2s ease; }
.lab-stepper { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; margin: 18px 0; border: 1px solid var(--lab-line); border-radius: 10px; overflow: hidden; background: var(--lab-white); }
.lab-step-tab { position: relative; display: flex; flex-direction: column; align-items: flex-start; min-width: 0; min-height: 95px; gap: 5px; padding: 13px; border: 0; border-right: 1px solid var(--lab-line); background: none; color: var(--lab-ink); text-align: left; cursor: pointer; }
.lab-step-tab:last-child { border-right: 0; }
.lab-step-tab:hover, .lab-step-tab[aria-current="step"] { background: #e7eef7; }
.lab-step-tab[aria-current="step"] { box-shadow: inset 0 -3px var(--lab-blue); }
.lab-step-number { color: var(--lab-rust); font: italic 21px/1 Georgia, serif; }
.lab-step-tab-title { max-width: 100%; font-size: 12px; font-weight: 700; line-height: 1.25; }
.lab-step-dot { position: absolute; top: 12px; right: 12px; width: 7px; height: 7px; border: 1px solid #b6c3cc; border-radius: 50%; }
.lab-step-tab[data-reviewed="true"] .lab-step-dot { background: var(--lab-green); border-color: var(--lab-green); }
.lab-step-panel { min-width: 0; padding: clamp(20px, 3vw, 34px); border: 1px solid var(--lab-line); border-radius: 13px; background: var(--lab-white); scroll-margin-top: 20px; }
.lab-step-panel + .lab-step-panel { margin-top: 15px; }
.lab-step-panel-head { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding-bottom: 13px; border-bottom: 1px solid var(--lab-line); }
.lab-step-panel-index { color: var(--lab-rust); font-size: 11px; font-weight: 800; letter-spacing: .13em; }
.lab-self-mark { display: inline-flex; gap: 7px; align-items: center; color: var(--lab-muted); font-size: 12px; cursor: pointer; }
.lab-self-mark input { width: 17px; height: 17px; accent-color: var(--lab-green); }
.lab-step-source h2 { margin: 18px 0 20px; }
.lab-step-source p:has(> strong:first-child) { margin-top: 18px; }
.lab-step-source p.lab-observation { padding: 13px 16px; border-left: 3px solid var(--lab-green); background: #e4f0e8; }
.lab-step-source p.lab-rescue { padding: 13px 16px; border-left: 3px solid var(--lab-rust); background: #f5e5d9; }
.lab-step-source p.lab-question { padding: 13px 16px; border: 1px dashed #b6c8d5; border-radius: 7px; background: #f4f8fa; }
.lab-step-actions { display: flex; justify-content: space-between; gap: 14px; margin-top: 27px; padding-top: 18px; border-top: 1px solid var(--lab-line); }
.lab-step-control { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 9px 16px; border: 1px solid var(--lab-line); border-radius: 7px; background: var(--lab-white); color: var(--lab-ink) !important; font: 700 13px/1.2 Arial, sans-serif; text-decoration: none; cursor: pointer; }
/* Match the shared .v5-page button specificity so background and label stay paired. */
.v5-page .lab-step-control { background: var(--lab-white); color: var(--lab-ink) !important; }
.v5-page .lab-step-control.lab-step-next { border-color: var(--portal-blue-deep, #0d3c70); background: var(--portal-blue-deep, #0d3c70); color: #fff !important; }
.v5-page .lab-step-control:hover:not(:disabled):not([aria-disabled="true"]) { background: #e7eef7; border-color: var(--lab-blue); color: var(--lab-ink) !important; }
.v5-page .lab-step-control.lab-step-next:hover:not(:disabled):not([aria-disabled="true"]) { background: #10283f; border-color: #10283f; color: #fff !important; }
.v5-page .lab-step-control:is(:disabled, [aria-disabled="true"]) { background: #e4e7eb; border-color: #c4cbd3; color: #505c69 !important; opacity: 1; cursor: not-allowed; }
.v5-page .lab-step-control:focus-visible { outline: 3px solid var(--lab-blue); outline-offset: 4px; }
.lab-copy { position: absolute; top: 7px; right: 7px; padding: 5px 9px; border: 1px solid #a8bdcb; border-radius: 5px; background: white; color: var(--lab-blue); font: 700 10px/1 Arial, sans-serif; cursor: pointer; }

/* A checkpoint is a terminal task, never a simulated pass result. */
.lab-checkpoint { padding: 35px; margin-top: 40px; border: 1px solid #97bcaa; border-radius: 15px; background: #f4faf6; }
.lab-checkpoint h2 { margin-top: 0; }
.lab-checkpoint-intro { color: var(--lab-muted); font-size: 14px; }
.lab-checkpoint-source ol { padding-left: 26px; }
.lab-checkpoint-source li { padding-left: 4px; }
.lab-checkpoint-source li label { display: inline-flex; gap: 8px; align-items: start; cursor: pointer; }
.lab-checkpoint-source li input { flex: none; width: 16px; height: 16px; margin-top: 4px; accent-color: var(--lab-green); }
.lab-check-status { min-height: 1.5em; color: var(--lab-green); font-size: 12px; font-weight: 700; }
.lab-project-addition { padding: 35px; margin-top: 24px; border: 1px solid #c8d9e7; border-radius: 15px; background: #eef4f8; }
.lab-project-addition h2 { margin-top: 0; }
.lab-project-link { margin-top: 12px; font-size: 13px; }
.lab-handoff { padding: 34px; border: 2px solid var(--lab-rust); border-radius: 12px; background: #fff9f3; }
.lab-handoff h2 { margin-top: 0; }
.lab-engineer { padding: 35px; margin-top: 26px; border: 1px solid var(--lab-line); border-radius: 15px; background: var(--lab-white); }
.lab-engineer h2 { margin-top: 0; }
.lab-engineer-drawer { margin-top: 18px; border-top: 1px solid var(--lab-line); padding-top: 14px; }
.lab-engineer-drawer summary { color: var(--lab-blue); font-weight: 800; }
.lab-engineer-reference { max-height: 65vh; margin-top: 17px; padding: 20px; overflow-y: auto; border: 1px solid var(--lab-line); border-radius: 9px; background: #f7f7f4; }
.lab-engineer-reference h1 { font: 700 27px/1.2 Georgia, serif; }
.lab-engineer-reference h2 { margin-top: 26px; font-size: 21px; }
.lab-help { padding: 33px; margin-top: 26px; border: 1px solid var(--lab-line); border-radius: 15px; background: var(--lab-white); }
.lab-help h2 { margin-top: 0; }
.lab-help details { margin-top: 18px; padding: 14px 0; border-top: 1px solid var(--lab-line); }
.lab-help details summary { font-weight: 700; }
.lab-continue { display: flex; justify-content: flex-end; padding: 30px 0; }
.lab-continue a { padding: 12px 18px; border-radius: 8px; background: var(--lab-ink); color: white; font-weight: 700; text-decoration: none; }

@media (max-width: 1120px) {
  .lab-index-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-cover { grid-template-columns: 1fr; }
  .lab-cover-architecture img, .lab-cover-architecture svg { max-height: 450px; }
  .lab-layout { grid-template-columns: 1fr; }
  .lab-section-nav { position: static; flex-direction: row; flex-wrap: wrap; margin-top: 13px; border-left: 0; border-bottom: 1px solid var(--lab-line); }
  .lab-section-nav a { border-left: 0; border-bottom: 2px solid transparent; }
  .lab-section-nav a:hover, .lab-section-nav a[aria-current] { border-left: 0; border-bottom-color: var(--lab-blue); }
}
@media (max-width: 760px) {
  .lab-index-grid, .lab-environment-grid { grid-template-columns: 1fr; }
  .lab-index-hero::after { opacity: .35; }
  .lab-index-card-visual { height: 180px; }
  .lab-course-rail { overflow-x: auto; flex-wrap: nowrap; }
  .lab-course-rail a { flex: none; }
  .lab-section-nav { flex-wrap: nowrap; overflow-x: auto; }
  .lab-section-nav a { flex: none; white-space: nowrap; }
  .lab-stepper { display: flex; overflow-x: auto; }
  .lab-step-tab { flex: 0 0 150px; }
  .lab-work-intro { grid-template-columns: 1fr; }
  .lab-progress-card { max-width: 260px; }
  .lab-checkpoint, .lab-project-addition, .lab-engineer, .lab-help, .lab-handoff { padding: 22px; }
}
@media (max-width: 440px) {
  .lab-index-hero { padding: 30px 20px; }
  .lab-index-hero h1 { font-size: 41px; }
  .lab-cover-copy h1 { font-size: 39px; }
  .lab-cover-architecture { padding: 10px; }
  .lab-step-panel { padding: 17px; }
  .lab-step-panel-head { align-items: flex-start; flex-direction: column; }
  .lab-step-source h2 { font-size: 25px; }
  .lab-section pre, .lab-engineer-reference pre { font-size: 11px; }
  .lab-step-actions { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  .lab-index-card, .lab-progress-track span { transition: none; }
  .lab-index-card:hover { transform: none; }
}
html:not(.lab-journey-js) .lab-stepper,
html:not(.lab-journey-js) .lab-progress-card,
html:not(.lab-journey-js) .lab-self-mark,
html:not(.lab-journey-js) .lab-step-actions { display: none !important; }
html:not(.lab-journey-js) .lab-work-intro { display: block; }
@media print {
  .lab-index-world, .lab-world, .lab-course-rail, .lab-section-nav, .lab-stepper,
  .lab-step-actions, .lab-copy, .lab-self-mark, .lab-continue { display: none !important; }
  .lab-journey [hidden], .lab-journey .lab-step-panel[hidden] { display: block !important; }
  .lab-cover, .lab-layout, .lab-environment-grid { display: block; }
  .lab-section, .lab-step-panel { break-inside: avoid; }
  .lab-step-panel { margin: 14px 0; }
  .lab-engineer-reference { max-height: none; overflow: visible; }
  .lab-section pre { white-space: pre-wrap; overflow-wrap: anywhere; }
}

/* Copy controls have their own row; never obscure commands on narrow screens. */
.lab-step-source pre,.lab-checkpoint-source pre{padding-top:62px}
@media(max-width:680px){.lab-section pre,.lab-engineer-reference pre{font-size:13px}}
@media print{.lab-step-source pre,.lab-checkpoint-source pre{padding-top:19px}}

/* V5.1: the existing rail selects one primary panel; work steps stay nested. */
.lab-primary-navigation{position:sticky;top:20px;align-self:start}
.lab-primary-navigation .lab-section-nav{position:static;margin-top:0}
.lab-navigation-note{font-size:11px;line-height:1.5;color:var(--lab-muted);padding:8px 12px}
.lab-section-nav [data-section-status]{font:normal 13px/1 Arial,sans-serif;min-width:12px;color:var(--lab-green)}
.lab-section-picker{display:none}
.lab-journey [data-primary-panel]{margin-top:0;padding-top:24px;scroll-margin-top:20px}
.lab-primary-heading{margin-bottom:24px}
.lab-primary-heading h2{margin:5px 0 0;font-size:clamp(22px,2.3vw,31px)}
.lab-primary-heading .lab-eyebrow{font-size:11px}
.lab-primary-actions{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:28px;padding-top:18px;border-top:1px solid var(--lab-line)}
.lab-target-architecture .architecture{max-width:1000px;margin:0}
.lab-architecture-labels{display:flex;flex-wrap:wrap;gap:12px 28px;padding-left:20px;font-size:14px}
.lab-reference-boundary{border-left:3px solid var(--lab-rust);background:#f5e5d9;padding:14px}
.lab-layout{scroll-margin-top:16px}
@media(max-width:1120px) and (min-width:761px){
 .lab-journey-page .lab-layout{grid-template-columns:170px minmax(0,1fr);gap:20px}
 .lab-primary-navigation .lab-section-nav{flex-direction:column;border-left:1px solid var(--lab-line);border-bottom:0}
 .lab-primary-navigation .lab-section-nav a{border-bottom:0;border-left:2px solid transparent;font-size:11px;padding:8px}
 .lab-primary-navigation .lab-section-nav a[aria-current]{border-left-color:var(--lab-blue)}
 .lab-environment-grid{grid-template-columns:1fr}
 .lab-work-intro{grid-template-columns:1fr}
 .lab-stepper{display:flex;overflow-x:auto}.lab-step-tab{flex:0 0 150px}
}
@media(max-width:760px){
 .lab-primary-navigation{position:static}
 .lab-journey-js .lab-primary-navigation .lab-section-nav{display:none}
 .lab-journey-js .lab-section-picker{display:block;font-size:12px;color:var(--lab-muted)}
 .lab-section-picker select{display:block;width:100%;min-height:44px;margin-top:6px;background:var(--lab-white);color:var(--lab-ink);border:1px solid var(--lab-line);border-radius:8px;padding:9px;font:inherit}
 .lab-navigation-note{font-size:10px;margin:4px 0;padding:0}
 .lab-navigation-note br{display:none}
 .lab-layout{gap:8px}
 .lab-primary-actions .lab-step-control{font-size:12px}
}
html:not(.lab-journey-js) .lab-primary-actions{display:none}
@media print{
 .lab-primary-navigation,.lab-primary-actions{display:none!important}
 .v5-page .lab-journey [data-primary-panel][hidden],.v5-page .lab-journey [data-step-panel][hidden]{display:block!important}
 .lab-journey [data-primary-panel]{break-before:auto}
}

.lab-section-nav a:hover:not([aria-current]){background:transparent;border-color:transparent;color:var(--lab-ink);text-decoration:underline}