:root {
  --lab-lime: #a3e635;
  --lab-teal: #7dd3fc;
  --lab-blue: #60a5fa;
  --lab-amber: #fbbf24;
  --lab-violet: #c4b5fd;
  --lab-paper: #f3f0e8;
  --lab-ink: #0b1117;
  --lab-shelf: #65452f;
  --lab-shelf-edge: #9a6d46;
}

.kb-page .page-kicker,
.lab-page .page-kicker {
  color: #aeb9c5;
}

.kb-page,
.lab-page {
  width: min(1320px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6.5rem) 0 clamp(5rem, 9vw, 8rem);
}

.kb-hero,
.lab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.38fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  padding-bottom: clamp(2rem, 5vw, 4rem);
  border-bottom: 1px solid rgba(226, 232, 240, 0.18);
}

.kb-hero .page-title,
.lab-hero .page-title {
  max-width: 920px;
  margin: 0.35rem 0 1.25rem;
  font-size: clamp(3.4rem, 7vw, 7rem);
  line-height: 0.92;
  letter-spacing: -0.055em;
}

.kb-intro,
.lab-intro {
  max-width: 780px;
  margin: 0;
  color: #d9e0e8;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.55;
}

.kb-hero-note,
.lab-hero-note {
  margin: 0;
  padding: 1.2rem 0 0 1.25rem;
  border-top: 2px solid rgba(226, 232, 240, 0.32);
  color: #aeb9c5;
  font-size: 0.95rem;
  line-height: 1.6;
}

.kb-jump,
.lab-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.7rem 0 0;
}

.kb-jump a,
.lab-jump a,
.software-chooser a {
  display: inline-flex;
  min-height: 2.55rem;
  align-items: center;
  padding: 0.52rem 0.82rem;
  border: 1px solid rgba(226, 232, 240, 0.2);
  border-radius: 2px;
  background: rgba(11, 17, 23, 0.72);
  color: #e8edf2;
  font-size: 0.83rem;
  font-weight: 780;
  text-decoration: none;
}

.kb-jump a:hover,
.kb-jump a:focus-visible,
.lab-jump a:hover,
.lab-jump a:focus-visible,
.software-chooser a:hover,
.software-chooser a:focus-visible {
  border-color: var(--lab-lime);
  color: var(--lab-lime);
}

.kb-shelves {
  display: grid;
  gap: clamp(4rem, 8vw, 7rem);
  margin-top: clamp(4rem, 8vw, 7rem);
}

.kb-shelf {
  position: relative;
  padding-bottom: 1.4rem;
  border-bottom: 10px solid var(--lab-shelf);
}

.kb-shelf::after {
  position: absolute;
  right: 0;
  bottom: -15px;
  left: 0;
  height: 5px;
  background: var(--lab-shelf-edge);
  content: "";
}

.shelf-head {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(18rem, 1fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 1.5rem;
}

.shelf-head h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(2rem, 4.5vw, 4.2rem);
  letter-spacing: -0.04em;
}

.shelf-head p {
  max-width: 700px;
  margin: 0;
  color: #9aa6b2;
  line-height: 1.55;
}

.book-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  align-items: stretch;
}

.book {
  position: relative;
  display: flex;
  min-height: 15rem;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.35rem 1.35rem 1.2rem 1.65rem;
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.16);
  border-left: 7px solid var(--book-accent, var(--lab-lime));
  background: #0b1117;
  color: inherit;
  text-decoration: none;
  transition: transform 170ms ease, border-color 170ms ease, background 170ms ease;
}

.book::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--book-accent, var(--lab-lime));
  content: "";
}

.book:hover,
.book:focus-visible {
  border-color: var(--book-accent, var(--lab-lime));
  background: #111c23;
  transform: translateY(-4px);
}

.book--lime {
  --book-accent: var(--lab-lime);
}

.book--teal {
  --book-accent: var(--lab-teal);
}

.book--blue {
  --book-accent: var(--lab-blue);
}

.book--amber {
  --book-accent: var(--lab-amber);
}

.book--violet {
  --book-accent: var(--lab-violet);
}

.book-label {
  margin: 0 0 2.2rem;
  color: var(--book-accent, var(--lab-lime));
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.book h3 {
  margin: 0 0 0.75rem;
  color: #fff;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: -0.025em;
}

.book p {
  margin: 0;
  color: #aab5c1;
  font-size: 0.92rem;
  line-height: 1.55;
}

.book small {
  display: block;
  margin-top: 1.25rem;
  color: #dfe6ed;
  font-size: 0.75rem;
  font-weight: 750;
}

.lab-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0 0 1.35rem;
  color: #8795a3;
  font-size: 0.8rem;
}

.lab-crumbs a {
  color: #cbd5e1;
}

.lab-hero--module {
  grid-template-columns: minmax(0, 0.78fr) minmax(18rem, 0.42fr);
}

.lab-hero--module .page-title {
  font-size: clamp(3rem, 6.2vw, 6rem);
}

.step-badge {
  display: inline-flex;
  width: 4.6rem;
  height: 4.6rem;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(163, 230, 53, 0.4);
  border-radius: 50%;
  background: rgba(163, 230, 53, 0.08);
  color: var(--lab-lime);
  font-size: 1.45rem;
  font-weight: 900;
}

.route-map {
  display: grid;
  grid-template-columns: repeat(7, minmax(8.5rem, 1fr));
  overflow-x: auto;
  border-top: 1px solid rgba(226, 232, 240, 0.17);
  border-bottom: 1px solid rgba(226, 232, 240, 0.17);
  scroll-snap-type: x proximity;
}

.route-shell {
  margin-top: 2rem;
}

.route-status {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  margin: 0;
  padding: 0 0 0.75rem;
  color: #aeb9c5;
  font-size: 0.78rem;
}

.route-status span {
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-status strong {
  color: #f8fafc;
}

.route-map a {
  display: grid;
  min-height: 8.4rem;
  align-content: space-between;
  padding: 1rem;
  border-left: 1px solid rgba(226, 232, 240, 0.17);
  color: #b9c4ce;
  scroll-snap-align: start;
  text-decoration: none;
}

.route-map a:first-child {
  border-left: 0;
}

.route-map a:hover,
.route-map a:focus-visible {
  background: #111c23;
  color: #fff;
}

.route-map a[aria-current="step"] {
  box-shadow: inset 0 4px 0 var(--lab-lime);
  background: #162117;
  color: #fff;
}

.route-map span {
  color: var(--lab-lime);
  font-size: 0.72rem;
  font-weight: 900;
}

.route-map strong {
  font-size: 0.86rem;
  line-height: 1.3;
}

.module-quick-nav {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1px;
  border: 1px solid rgba(226, 232, 240, 0.17);
  border-top: 0;
  background: rgba(226, 232, 240, 0.17);
}

.module-quick-nav a {
  padding: 0.8rem 1rem;
  background: #0b1117;
  color: #dce4eb;
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}

.module-quick-nav a:nth-child(2) {
  text-align: right;
}

.module-quick-nav a:hover,
.module-quick-nav a:focus-visible {
  background: #111c23;
  color: var(--lab-lime);
}

.problem-brief {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  margin-top: 2rem;
  padding: clamp(1.4rem, 3vw, 2.25rem);
  border: 1px solid rgba(226, 232, 240, 0.2);
  border-left: 6px solid var(--lab-blue);
  background: #0b1117;
}

.problem-brief h2 {
  margin: 0.35rem 0 0.85rem;
  color: #fff;
  font-size: clamp(1.7rem, 3vw, 2.65rem);
  letter-spacing: -0.035em;
}

.problem-brief > div > p:last-child {
  margin-bottom: 0;
  color: #b8c4ce;
  line-height: 1.65;
}

.brief-questions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(226, 232, 240, 0.16);
  background: rgba(226, 232, 240, 0.16);
}

.brief-questions article {
  padding: 1rem;
  background: #10171e;
}

.brief-questions span,
.route-choice span {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--lab-blue);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.brief-questions strong {
  color: #fff;
  font-size: 0.95rem;
}

.brief-questions p {
  margin: 0.55rem 0 0;
  color: #9facb8;
  font-size: 0.8rem;
  line-height: 1.5;
}

.route-choice {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.route-choice article {
  padding: 1.2rem;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: #0b1117;
}

.route-choice h3 {
  margin: 0 0 0.55rem;
  color: #fff;
}

.route-choice p {
  margin: 0;
  color: #aeb9c5;
  font-size: 0.88rem;
  line-height: 1.55;
}

.route-choice a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--lab-lime);
  font-weight: 850;
}

.route-books {
  display: grid;
  grid-template-columns: repeat(7, minmax(8.8rem, 1fr));
  gap: 0.45rem;
  align-items: end;
  padding: 0.8rem 0 1.15rem;
  overflow-x: auto;
  border-bottom: 10px solid var(--lab-shelf);
  scroll-snap-type: x proximity;
}

.route-book {
  display: flex;
  min-height: 17rem;
  flex-direction: column;
  padding: 1.05rem;
  border: 1px solid rgba(226, 232, 240, 0.16);
  border-left: 6px solid var(--lab-lime);
  background: #0b1117;
  color: inherit;
  scroll-snap-align: start;
  text-decoration: none;
}

.route-book:nth-child(2),
.route-book:nth-child(6) {
  min-height: 18.2rem;
  border-left-color: var(--lab-blue);
}

.route-book:nth-child(3),
.route-book:nth-child(7) {
  min-height: 16.4rem;
  border-left-color: var(--lab-violet);
}

.route-book:nth-child(4) {
  min-height: 17.6rem;
  border-left-color: var(--lab-amber);
}

.route-book:nth-child(5) {
  min-height: 18.6rem;
  border-left-color: var(--lab-teal);
}

.route-book:hover,
.route-book:focus-visible {
  border-color: var(--lab-lime);
  background: #111c23;
  transform: translateY(-3px);
}

.route-book .card-number {
  margin-bottom: 2.2rem;
}

.route-book h3 {
  margin: 0 0 0.65rem;
  color: #fff;
  font-size: 1.05rem;
  line-height: 1.2;
}

.route-book p {
  margin: 0;
  color: #98a6b3;
  font-size: 0.78rem;
  line-height: 1.5;
}

.route-book strong {
  margin-top: auto;
  padding-top: 1.2rem;
  color: #eef3f7;
  font-size: 0.76rem;
}

.beginner-scaffold {
  margin-top: 2rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid rgba(226, 232, 240, 0.18);
  background: #0b1117;
}

.beginner-scaffold-head {
  display: grid;
  grid-template-columns: minmax(12rem, 0.35fr) minmax(0, 1fr);
  gap: 0.35rem clamp(2rem, 6vw, 6rem);
  align-items: end;
  margin-bottom: 1.25rem;
}

.beginner-scaffold-head .page-kicker {
  grid-column: 1;
}

.beginner-scaffold-head h2 {
  grid-column: 1;
  margin: 0.35rem 0 0;
  color: #fff;
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  letter-spacing: -0.035em;
}

.beginner-scaffold-head > p:last-child {
  grid-column: 2;
  grid-row: 1 / span 2;
  max-width: 680px;
  margin: 0;
  color: #aeb9c5;
  line-height: 1.6;
}

.beginner-scaffold-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid rgba(226, 232, 240, 0.16);
  background: rgba(226, 232, 240, 0.16);
}

.scaffold-card {
  min-width: 0;
  padding: 1.1rem;
  background: #10171e;
}

.scaffold-card--before,
.scaffold-card--why,
.scaffold-card--action {
  grid-column: 1 / -1;
}

.scaffold-card > span,
.scaffold-next > span {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--lab-lime);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.scaffold-card p,
.scaffold-card li,
.scaffold-card dd {
  color: #b7c2cc;
  font-size: 0.86rem;
  line-height: 1.6;
}

.scaffold-card > p {
  margin: 0;
}

.scaffold-card h3 {
  margin: 1rem 0 0.6rem;
  color: #fff;
  font-size: 0.84rem;
}

.scaffold-card ol {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding-left: 1.2rem;
}

.scaffold-terms {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin: 0;
  border: 1px solid rgba(226, 232, 240, 0.14);
  background: rgba(226, 232, 240, 0.14);
}

.scaffold-terms > div {
  min-width: 12rem;
  flex: 1 1 30%;
  padding: 0.8rem;
  background: #0b1117;
}

.scaffold-terms dt,
.scaffold-terms dd {
  margin: 0;
}

.scaffold-terms dfn {
  color: #fff;
  font-style: normal;
  font-weight: 850;
}

.scaffold-terms dd {
  margin-top: 0.3rem;
  color: #98a6b3;
  font-size: 0.78rem;
  line-height: 1.5;
}

.scaffold-software {
  margin-top: 1rem;
  padding: 0.9rem;
  border-left: 3px solid var(--lab-teal);
  background: rgba(125, 211, 252, 0.06);
}

.scaffold-software strong {
  color: #fff;
  font-size: 0.84rem;
}

.scaffold-software p {
  margin: 0.35rem 0 0;
}

.scaffold-software-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.scaffold-software-links a {
  padding: 0.45rem 0.65rem;
  border: 1px solid rgba(226, 232, 240, 0.2);
  color: #dce4eb;
  font-size: 0.74rem;
  font-weight: 800;
  text-decoration: none;
}

.scaffold-software-links a:hover,
.scaffold-software-links a:focus-visible {
  border-color: var(--lab-teal);
  color: var(--lab-teal);
}

.scaffold-card--ready {
  border-left: 3px solid var(--lab-lime);
  background: rgba(163, 230, 53, 0.06);
}

.scaffold-next {
  display: grid;
  grid-template-columns: minmax(8rem, 0.25fr) minmax(13rem, 0.35fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  margin-top: 1px;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(163, 230, 53, 0.45);
  border-left: 6px solid var(--lab-lime);
  background: #111c17;
  color: inherit;
  text-decoration: none;
}

.scaffold-next > span {
  margin: 0;
}

.scaffold-next strong {
  color: #fff;
  font-size: 1rem;
}

.scaffold-next small {
  color: #aeb9c5;
  font-size: 0.8rem;
  line-height: 1.5;
}

.scaffold-next:hover,
.scaffold-next:focus-visible {
  background: #162419;
  border-color: var(--lab-lime);
}

.lab-section {
  display: grid;
  grid-template-columns: minmax(12rem, 0.3fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding: clamp(2.75rem, 4vw, 3.5rem) 0;
  border-bottom: 1px solid rgba(226, 232, 240, 0.17);
}

.lab-section:last-of-type {
  border-bottom: 0;
}

.lab-section-head {
  align-self: start;
}

.lab-section-head h2 {
  margin: 0.35rem 0 0;
  color: #fff;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  letter-spacing: -0.035em;
}

.lab-section-body {
  min-width: 0;
}

.lab-section-body > :first-child {
  margin-top: 0;
}

.lab-section-body > p,
.lab-section-body > ul,
.lab-section-body > ol {
  max-width: 800px;
  color: #bdc7d1;
  font-size: 1rem;
  line-height: 1.7;
}

.lab-section-body strong {
  color: #f8fafc;
}

.learning-grid,
.decision-grid,
.download-grid,
.resource-grid,
.software-grid,
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.learning-card,
.decision-card,
.download-card,
.resource-card,
.result-card {
  padding: 1.25rem;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: #0b1117;
}

.learning-card h3,
.decision-card h3,
.download-card h3,
.resource-card h3,
.result-card h3 {
  margin: 0 0 0.55rem;
  color: #fff;
  font-size: 1.15rem;
}

.learning-card p,
.decision-card p,
.download-card p,
.resource-card p,
.result-card p {
  margin: 0;
  color: #9eabb7;
  font-size: 0.9rem;
  line-height: 1.55;
}

.learning-card .card-number,
.decision-card .card-number {
  display: block;
  margin-bottom: 1.6rem;
  color: var(--lab-lime);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.learning-card a,
.download-card a,
.resource-card a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--lab-lime);
  font-weight: 800;
}

.decision-card--continuous {
  border-top: 3px solid var(--lab-lime);
}

.decision-card--binary {
  border-top: 3px solid var(--lab-teal);
}

.decision-card--binary .card-number {
  color: var(--lab-teal);
}

.decision-card--ordered {
  border-top: 3px solid var(--lab-violet);
}

.decision-card--ordered .card-number {
  color: var(--lab-violet);
}

.decision-card--count {
  border-top: 3px solid var(--lab-amber);
}

.decision-card--count .card-number {
  color: var(--lab-amber);
}

.decision-card--time {
  border-top: 3px solid var(--lab-blue);
}

.decision-card--time .card-number {
  color: var(--lab-blue);
}

.decision-grid--models {
  grid-template-columns: repeat(5, minmax(10rem, 1fr));
  overflow-x: auto;
}

.download-card--common {
  grid-column: 1 / -1;
  border-color: rgba(163, 230, 53, 0.45);
  background: rgba(163, 230, 53, 0.06);
}

.download-list {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.9rem;
}

.download-list a {
  margin: 0;
}

.software-chooser {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.2rem 0 1.8rem;
}

.software-grid {
  grid-template-columns: 1fr;
  min-width: 0;
}

.software-block {
  min-width: 0;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: #080d12;
}

.software-block > summary {
  display: flex;
  min-height: 3.6rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  color: #fff;
  cursor: pointer;
  font-weight: 850;
  list-style: none;
}

.software-block > summary::-webkit-details-marker {
  display: none;
}

.software-block > summary::after {
  color: var(--lab-lime);
  content: "Open";
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.software-block[open] > summary::after {
  content: "Close";
}

.software-block[open] > summary {
  border-bottom: 1px solid rgba(226, 232, 240, 0.17);
}

.software-block .software-copy {
  padding: 1rem 1rem 0;
  color: #aeb9c5;
  font-size: 0.9rem;
  line-height: 1.55;
}

.software-block .code-block {
  margin: 0;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.software-block .software-download {
  display: block;
  padding: 0.9rem 1rem;
  border-top: 1px solid rgba(226, 232, 240, 0.14);
  color: var(--lab-lime);
  font-size: 0.84rem;
  font-weight: 800;
}

.test-table {
  width: 100%;
  border-collapse: collapse;
  color: #bdc7d1;
  font-size: 0.9rem;
}

.test-table th,
.test-table td {
  padding: 0.85rem;
  border-bottom: 1px solid rgba(226, 232, 240, 0.16);
  text-align: left;
  vertical-align: top;
}

.test-table th {
  color: #fff;
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lab-note,
.lab-warning {
  max-width: 820px;
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--lab-lime);
  background: rgba(163, 230, 53, 0.06);
  color: #cbd5e1;
  line-height: 1.62;
}

.lab-warning {
  border-left-color: var(--lab-amber);
  background: rgba(251, 191, 36, 0.06);
}

.lab-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: clamp(3rem, 7vw, 6rem);
  border: 1px solid rgba(226, 232, 240, 0.18);
  background: rgba(226, 232, 240, 0.18);
}

.lab-nav a {
  min-height: 7rem;
  padding: 1.2rem;
  background: #0b1117;
  color: #aeb9c5;
  text-decoration: none;
}

.lab-nav a:last-child {
  text-align: right;
}

.lab-nav a:hover,
.lab-nav a:focus-visible {
  background: #111c23;
}

.lab-nav span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--lab-lime);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lab-nav strong {
  color: #fff;
}

.first-contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.38fr);
  gap: clamp(2rem, 5vw, 5rem);
}

.pane-list {
  counter-reset: panes;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.pane-card {
  padding: 1.2rem;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: #0b1117;
}

.pane-card::before {
  counter-increment: panes;
  display: block;
  margin-bottom: 1.5rem;
  color: var(--lab-lime);
  content: "0" counter(panes);
  font-size: 0.72rem;
  font-weight: 900;
}

.pane-card h3 {
  margin: 0 0 0.5rem;
  color: #fff;
}

.pane-card p {
  margin: 0;
  color: #9eabb7;
  font-size: 0.9rem;
  line-height: 1.55;
}

.manual-path {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  border: 1px solid rgba(226, 232, 240, 0.18);
  background: rgba(226, 232, 240, 0.18);
}

.manual-path--compact {
  margin: 2rem 0 3rem;
}

.manual-path a {
  display: grid;
  min-height: 9rem;
  align-content: start;
  padding: 1.1rem;
  background: #0b1117;
  color: inherit;
  text-decoration: none;
}

.manual-path a:hover,
.manual-path a:focus-visible,
.manual-path a[aria-current="step"] {
  background: #111c23;
}

.manual-path span {
  margin-bottom: 1.1rem;
  color: var(--lab-lime);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.manual-path strong {
  color: #fff;
  font-size: 1.03rem;
}

.manual-path small {
  margin-top: 0.55rem;
  color: #98a6b3;
  font-size: 0.78rem;
  line-height: 1.5;
}

.clinical-vignette {
  display: grid;
  grid-template-columns: minmax(17rem, 0.36fr) minmax(0, 1fr);
  margin-top: 2rem;
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.2);
  background: #0b1117;
}

.case-portrait {
  position: relative;
  min-height: 100%;
  margin: 0;
  background: #111820;
}

.case-portrait img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 30rem;
  object-fit: cover;
  object-position: 43% center;
}

.case-portrait figcaption {
  position: absolute;
  right: 0.8rem;
  bottom: 0.8rem;
  left: 0.8rem;
  padding: 0.55rem 0.7rem;
  background: rgba(5, 8, 11, 0.82);
  color: #eef3f7;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.case-investigation {
  align-self: center;
  padding: clamp(1.5rem, 4vw, 3rem);
}

.case-investigation .page-kicker {
  color: var(--lab-teal);
}

.clinical-vignette h2 {
  max-width: 760px;
  margin: 0.35rem 0 0.8rem;
  color: #fff;
  font-size: clamp(1.45rem, 2.8vw, 2.25rem);
  letter-spacing: -0.03em;
}

.case-summary {
  max-width: 800px;
  margin: 0;
  color: #c6d2dc;
  line-height: 1.7;
}

.case-prompts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid rgba(226, 232, 240, 0.16);
  background: rgba(226, 232, 240, 0.16);
}

.case-prompts > div {
  padding: 1rem;
  background: #10171e;
}

.case-prompts span {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--lab-teal);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.case-prompts p {
  margin: 0;
  color: #dce4eb;
  font-size: 0.88rem;
  line-height: 1.55;
}

.output-panel {
  margin: 1.5rem 0;
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.2);
  background: #080d12;
}

.output-panel > header {
  padding: 1rem 1.15rem;
  border-bottom: 1px solid rgba(226, 232, 240, 0.16);
  background: #10171e;
}

.output-panel > header span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--lab-blue);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.output-panel > header h3 {
  margin: 0;
  color: #fff;
  font-size: 1.2rem;
}

.output-panel > pre,
.outcome-workflow > pre {
  margin: 0;
  overflow-x: auto;
  padding: 1.15rem;
  border: 0;
  background: #05080b;
  color: #dce7ef;
  font-size: 0.78rem;
  line-height: 1.65;
}

.output-reading {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid rgba(226, 232, 240, 0.16);
  background: rgba(226, 232, 240, 0.16);
}

.output-reading > div {
  padding: 1.15rem;
  background: #10171e;
}

.output-reading h4 {
  margin: 0 0 0.55rem;
  color: #fff;
  font-size: 0.85rem;
}

.output-reading p,
.output-reading blockquote {
  margin: 0;
  color: #aeb9c5;
  font-size: 0.86rem;
  line-height: 1.6;
}

.output-reading blockquote {
  padding-left: 0.85rem;
  border-left: 3px solid var(--lab-lime);
  color: #e1e8ee;
}

.outcome-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.outcome-jump a {
  padding: 0.55rem 0.75rem;
  border: 1px solid rgba(226, 232, 240, 0.2);
  background: #0b1117;
  color: #dce4eb;
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}

.outcome-jump a:hover,
.outcome-jump a:focus-visible {
  border-color: var(--lab-lime);
  color: var(--lab-lime);
}

.outcome-workflows {
  display: grid;
  min-width: 0;
  gap: 0.8rem;
}

.outcome-workflow {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid rgba(226, 232, 240, 0.18);
  border-top: 4px solid var(--lab-lime);
  background: #0b1117;
  scroll-margin-top: 6rem;
}

.outcome-workflow--binary {
  border-top-color: var(--lab-teal);
}

.outcome-workflow--ordered {
  border-top-color: var(--lab-violet);
}

.outcome-workflow--count {
  border-top-color: var(--lab-amber);
}

.outcome-workflow--time {
  border-top-color: var(--lab-blue);
}

.outcome-workflow > header span {
  display: block;
  margin-bottom: 0.4rem;
  color: #91a0ad;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.outcome-workflow > header h3 {
  margin: 0;
  color: #fff;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
}

.outcome-question {
  margin: 1rem 0;
  padding: 0.9rem;
  border-left: 3px solid rgba(226, 232, 240, 0.35);
  background: #10171e;
}

.outcome-question strong {
  color: #fff;
}

.outcome-question p {
  margin: 0.3rem 0 0;
  color: #b8c4ce;
  line-height: 1.55;
}

.outcome-workflow ol {
  margin: 1rem 0;
  padding-left: 1.25rem;
  color: #aeb9c5;
  font-size: 0.88rem;
  line-height: 1.6;
}

.outcome-workflow li + li {
  margin-top: 0.45rem;
}

.outcome-workflow > pre {
  margin: 1rem 0;
  border: 1px solid rgba(226, 232, 240, 0.14);
}

.exact-interpretation {
  padding: 1rem;
  background: rgba(96, 165, 250, 0.07);
}

.exact-interpretation span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--lab-blue);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.exact-interpretation p {
  margin: 0;
  color: #e0e7ed;
  line-height: 1.65;
}

.measure-basics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: rgba(226, 232, 240, 0.17);
}

.measure-card {
  padding: 1.2rem;
  background: #0b1117;
}

.measure-number {
  display: block;
  margin-bottom: 1.5rem;
  color: var(--lab-lime);
  font-size: 0.7rem;
  font-weight: 900;
}

.measure-card h3 {
  margin: 0 0 0.55rem;
  color: #fff;
  font-size: 1.1rem;
}

.measure-card p {
  margin: 0;
  color: #aeb9c5;
  font-size: 0.86rem;
  line-height: 1.55;
}

.plain-formula {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin: 1rem 0;
  padding: 1rem;
  border-left: 4px solid var(--lab-blue);
  background: rgba(96, 165, 250, 0.08);
  color: #cbd5e1;
}

.plain-formula > span:first-child {
  color: #fff;
  font-weight: 900;
}

.plain-formula strong {
  padding: 0.35rem 0.55rem;
  background: #111c23;
}

.measure-explanations {
  display: grid;
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid rgba(226, 232, 240, 0.17);
  background: rgba(226, 232, 240, 0.17);
}

.measure-explanation {
  display: grid;
  grid-template-columns: minmax(10rem, 0.28fr) minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.3rem;
  background: #0b1117;
}

.measure-name span {
  display: block;
  margin-bottom: 0.45rem;
  color: #91a0ad;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.measure-name h3 {
  margin: 0;
  color: #fff;
  font-size: 1.2rem;
}

.measure-explanation p {
  max-width: 760px;
  margin: 0;
  color: #aeb9c5;
  font-size: 0.9rem;
  line-height: 1.6;
}

.measure-explanation .measure-calculation {
  margin-bottom: 0.55rem;
  color: #eef3f7;
  font-size: 1rem;
}

.ratio-key {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 1rem;
  border-top: 2px solid #718096;
  color: #9faeba;
  font-size: 0.7rem;
  text-align: center;
}

.ratio-key > * {
  position: relative;
  padding-top: 0.65rem;
}

.ratio-key > *::before {
  position: absolute;
  top: -0.32rem;
  left: 50%;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #718096;
  content: "";
  transform: translateX(-50%);
}

.ratio-key strong {
  color: #fff;
}

.ratio-key strong::before {
  background: var(--lab-lime);
}

.manual-bridge {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.34fr);
  gap: 2rem;
  align-items: end;
  margin-top: clamp(3rem, 7vw, 6rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid rgba(196, 181, 253, 0.38);
  border-left: 6px solid var(--lab-violet);
  background: rgba(196, 181, 253, 0.07);
}

.manual-bridge h2 {
  margin: 0.35rem 0 0.7rem;
  color: #fff;
  font-size: clamp(1.7rem, 3.3vw, 2.8rem);
  letter-spacing: -0.035em;
}

.manual-bridge p {
  max-width: 760px;
  margin-bottom: 0;
  color: #b9c4ce;
  line-height: 1.65;
}

.manual-bridge > a {
  display: block;
  padding: 1.1rem;
  border: 1px solid rgba(196, 181, 253, 0.4);
  background: #0b1117;
  color: inherit;
  text-decoration: none;
}

.manual-bridge > a:hover,
.manual-bridge > a:focus-visible {
  border-color: var(--lab-violet);
  background: #111c23;
}

.manual-bridge > a span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--lab-violet);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.manual-bridge > a strong {
  color: #fff;
}

.software-shot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.software-shot {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.18);
  background: #0b1117;
}

.software-shot img {
  display: block;
  width: 100%;
  height: auto;
  background: #05080b;
}

.software-shot figcaption {
  padding: 1rem;
  color: #aeb9c5;
  font-size: 0.82rem;
  line-height: 1.55;
}

.software-shot figcaption a {
  display: inline-block;
  margin-top: 0.55rem;
  color: var(--lab-lime);
  font-weight: 800;
}

.import-steps {
  counter-reset: none;
  display: grid;
  gap: 0;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.import-steps li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(226, 232, 240, 0.16);
}

.import-steps li > span {
  color: var(--lab-lime);
  font-size: 0.78rem;
  font-weight: 900;
}

.import-steps h3 {
  margin: 0 0 0.35rem;
  color: #fff;
  font-size: 1rem;
}

.import-steps p {
  margin: 0;
  color: #aeb9c5;
  font-size: 0.9rem;
  line-height: 1.6;
}

.clinical-check {
  max-width: 820px;
  margin: 1.5rem 0;
  padding: 1.15rem;
  border-left: 3px solid var(--lab-teal);
  background: rgba(125, 211, 252, 0.07);
}

.clinical-check p {
  margin: 0.25rem 0 0;
  color: #c9d5df;
  line-height: 1.65;
}

@media (max-width: 980px) {
  .kb-hero,
  .lab-hero,
  .lab-hero--module,
  .lab-section,
  .shelf-head,
  .first-contact-layout,
  .problem-brief,
  .beginner-scaffold-head,
  .clinical-vignette,
  .manual-bridge {
    grid-template-columns: 1fr;
  }

  .beginner-scaffold-head .page-kicker,
  .beginner-scaffold-head h2,
  .beginner-scaffold-head > p:last-child {
    grid-column: 1;
    grid-row: auto;
  }

  .case-portrait img {
    height: 23rem;
    min-height: 0;
    object-position: center 39%;
  }

  .book-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .decision-grid--models {
    grid-template-columns: repeat(5, minmax(12rem, 1fr));
  }
}

@media (max-width: 680px) {
  .kb-page,
  .lab-page {
    width: min(100% - 1.25rem, 1320px);
  }

  .book-row,
  .learning-grid,
  .decision-grid,
  .download-grid,
  .resource-grid,
  .result-grid,
  .pane-list,
  .lab-nav,
  .manual-path,
  .measure-basics,
  .brief-questions,
  .route-choice,
  .output-reading,
  .beginner-scaffold-grid,
  .scaffold-next,
  .software-shot-grid {
    grid-template-columns: 1fr;
  }

  .scaffold-card--before,
  .scaffold-card--why,
  .scaffold-card--action {
    grid-column: auto;
  }

  .module-quick-nav {
    grid-template-columns: 1fr;
  }

  .module-quick-nav a:nth-child(2),
  .module-quick-nav a:last-child {
    text-align: left;
  }

  .route-status {
    display: grid;
  }

  .case-portrait img {
    height: 17rem;
  }

  .case-prompts,
  .measure-explanation {
    grid-template-columns: 1fr;
  }

  .case-investigation {
    padding: 1.25rem;
  }

  .ratio-key {
    font-size: 0.62rem;
  }

  .route-books {
    grid-template-columns: repeat(7, 9.2rem);
  }

  .output-panel > pre,
  .outcome-workflow > pre {
    font-size: 0.7rem;
  }

  .lab-nav a:last-child {
    text-align: left;
  }

  .kb-hero .page-title,
  .lab-hero .page-title,
  .lab-hero--module .page-title {
    font-size: clamp(2.8rem, 15vw, 4.6rem);
  }

  .route-map {
    grid-template-columns: repeat(7, 8.6rem);
  }

  .lab-section {
    padding: 3rem 0;
  }

  .test-table {
    display: block;
    overflow-x: auto;
  }
}