:root {
  color-scheme: light;
  --bg: #edf1f4;
  --paper: #fbfcfd;
  --paper-2: #f3f6f8;
  --ink: #182229;
  --muted: #62727d;
  --faint: #87949d;
  --line: #d6dee3;
  --strong: #b7c3cb;
  --purple: #7042c2;
  --purple-strong: #5d31aa;
  --purple-soft: #eee7fb;
  --blue: #087cac;
  --blue-soft: #e1f2f8;
  --green: #117957;
  --green-soft: #def3e9;
  --amber: #98630b;
  --amber-soft: #fbefd8;
  --red: #b23a4b;
  --red-soft: #fae7ea;
  --shadow: 0 1px 2px rgba(24, 34, 41, .05), 0 12px 36px rgba(24, 34, 41, .07);
  --shadow-lg: 0 24px 70px rgba(24, 34, 41, .12);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0f13;
  --paper: #12181e;
  --paper-2: #0e1419;
  --ink: #e8eef2;
  --muted: #9cabb5;
  --faint: #71818c;
  --line: #27323a;
  --strong: #40505b;
  --purple: #b79aff;
  --purple-strong: #c8b3ff;
  --purple-soft: #271c3e;
  --blue: #64cef5;
  --blue-soft: #102b36;
  --green: #65daa9;
  --green-soft: #102d22;
  --amber: #f1bb59;
  --amber-soft: #302310;
  --red: #ff8795;
  --red-soft: #35181d;
  --shadow: 0 1px 2px rgba(0, 0, 0, .36), 0 14px 40px rgba(0, 0, 0, .28);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, .42);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0b0f13;
    --paper: #12181e;
    --paper-2: #0e1419;
    --ink: #e8eef2;
    --muted: #9cabb5;
    --faint: #71818c;
    --line: #27323a;
    --strong: #40505b;
    --purple: #b79aff;
    --purple-strong: #c8b3ff;
    --purple-soft: #271c3e;
    --blue: #64cef5;
    --blue-soft: #102b36;
    --green: #65daa9;
    --green-soft: #102d22;
    --amber: #f1bb59;
    --amber-soft: #302310;
    --red: #ff8795;
    --red-soft: #35181d;
    --shadow: 0 1px 2px rgba(0, 0, 0, .36), 0 14px 40px rgba(0, 0, 0, .28);
    --shadow-lg: 0 28px 80px rgba(0, 0, 0, .42);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body.learning-site {
  min-height: 100vh;
  margin: 0 !important;
  padding: 0 !important;
  color: var(--ink) !important;
  background: var(--bg) !important;
  font: 15px/1.66 var(--sans) !important;
  -webkit-font-smoothing: antialiased;
}

body.learning-site::before,
body.learning-site::after {
  display: none !important;
}

.learning-site a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.learning-site button,
.learning-site input {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 9px 12px;
  border-radius: 7px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.learning-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(18px) saturate(1.2);
}

.learning-header__inner {
  display: flex;
  width: min(1240px, calc(100% - 40px));
  min-height: 64px;
  margin: 0 auto;
  align-items: center;
  gap: 24px;
}

.learning-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: var(--ink) !important;
  font-weight: 780;
  letter-spacing: -.02em;
  text-decoration: none;
}

.learning-brand__mark {
  position: relative;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--purple) 48%, var(--line));
  border-radius: 9px;
  color: var(--purple);
  background: var(--purple-soft);
  font: 800 14px/1 var(--mono);
}

.learning-brand__mark::after {
  position: absolute;
  width: 18px;
  height: 18px;
  right: -9px;
  bottom: -9px;
  border-radius: 50%;
  background: var(--purple);
  content: "";
  opacity: .55;
}

.learning-brand small {
  color: var(--faint);
  font: 650 10px/1 var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.learning-nav {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 6px;
}

.learning-nav a {
  padding: 7px 9px;
  border-radius: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.learning-nav a:hover,
.learning-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--paper-2);
}

.learning-actions {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 7px;
}

.learning-button {
  display: inline-flex;
  min-height: 34px;
  padding: 7px 10px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: var(--paper);
  font: 680 11px/1.2 var(--mono);
  cursor: pointer;
}

.learning-button:hover {
  color: var(--ink);
  border-color: var(--strong);
}

.learning-button:focus-visible,
.filter-chip:focus-visible,
.catalog-search:focus-visible,
.catalog-card:focus-visible,
.toc input:focus-visible + span {
  outline: 3px solid color-mix(in srgb, var(--purple) 32%, transparent);
  outline-offset: 2px;
}

.learning-button--primary {
  color: #fff;
  border-color: var(--purple-strong);
  background: var(--purple-strong);
}

.learning-button--primary:hover {
  color: #fff;
  filter: brightness(1.08);
}

.home-hero,
.lesson-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.home-hero::before,
.lesson-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  content: "";
  mask-image: linear-gradient(90deg, #000, transparent 82%);
  opacity: .54;
}

.home-hero::after,
.lesson-hero::after {
  position: absolute;
  width: 620px;
  height: 620px;
  top: -390px;
  right: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--purple) 23%, transparent), transparent 68%);
  content: "";
}

.home-hero__inner,
.lesson-hero__inner,
.learning-main,
.lesson-shell,
.learning-footer__inner {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.home-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 470px;
  padding: 76px 0 64px;
  align-items: end;
  grid-template-columns: minmax(0, 1.35fr) minmax(270px, .65fr);
  gap: 56px;
}

.eyebrow,
.lesson-kicker {
  color: var(--purple) !important;
  font: 760 11px/1.3 var(--mono) !important;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow::before,
.lesson-kicker::before {
  display: inline-block;
  width: 26px;
  height: 2px;
  margin: 0 10px 3px 0;
  background: var(--purple);
  content: "";
}

.home-hero h1,
.lesson-hero h1 {
  max-width: 900px;
  margin: 14px 0 14px;
  color: var(--ink) !important;
  font-size: clamp(40px, 6.2vw, 76px) !important;
  font-weight: 790 !important;
  line-height: 1.02 !important;
  letter-spacing: -.052em !important;
  text-wrap: balance;
}

.home-hero h1 span,
.lesson-hero h1 span {
  color: var(--purple);
}

.home-hero__lede,
.lesson-hero__lede {
  max-width: 790px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.55;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.hero-cta .learning-button {
  min-height: 42px;
  padding: 10px 14px;
  font-size: 12px;
  text-decoration: none;
}

.hero-stats {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  box-shadow: var(--shadow);
  grid-template-columns: repeat(2, 1fr);
}

.hero-stat {
  padding: 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-stat:nth-child(2n) {
  border-right: 0;
}

.hero-stat:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.hero-stat strong {
  display: block;
  margin-bottom: 5px;
  color: var(--purple);
  font: 780 26px/1 var(--mono);
}

.hero-stat span {
  color: var(--muted);
  font-size: 12px;
}

.learning-main {
  padding: 58px 0 110px;
}

.section-heading {
  display: flex;
  margin-bottom: 22px;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -.035em;
}

.section-heading p {
  max-width: 550px;
  margin: 0;
  color: var(--muted);
}

.resume-card {
  display: none;
  margin: 0 0 46px;
  padding: 20px 22px;
  align-items: center;
  gap: 18px;
  border: 1px solid color-mix(in srgb, var(--purple) 42%, var(--line));
  border-radius: 13px;
  background: var(--purple-soft);
}

.resume-card.is-visible {
  display: flex;
}

.resume-card__icon {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  background: var(--purple);
  font: 800 14px/1 var(--mono);
}

.resume-card__copy {
  min-width: 0;
  flex: 1;
}

.resume-card__copy small {
  display: block;
  margin-bottom: 3px;
  color: var(--purple);
  font: 740 10px/1.2 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.resume-card__copy strong {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: 16px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pathway {
  margin-bottom: 66px;
}

.pathway-grid {
  display: grid;
  grid-template-columns: 1fr 60px 1fr 60px 1fr;
  align-items: stretch;
}

.pathway-card {
  position: relative;
  display: flex;
  min-height: 210px;
  padding: 22px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--ink) !important;
  background: var(--paper);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.pathway-card:hover {
  border-color: color-mix(in srgb, var(--purple) 52%, var(--line));
  transform: translateY(-2px);
}

.pathway-card--choice::before {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 7px;
  border-radius: 99px;
  color: var(--purple);
  background: var(--purple-soft);
  font: 700 9px/1 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  content: "Choose one";
}

.pathway-card__number {
  margin-bottom: 30px;
  color: var(--purple);
  font: 780 12px/1 var(--mono);
}

.pathway-card h3 {
  margin: auto 0 7px;
  font-size: 20px;
  line-height: 1.18;
}

.pathway-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.pathway-arrow {
  display: grid;
  place-items: center;
  color: var(--faint);
  font: 600 22px/1 var(--mono);
}

.catalog-toolbar {
  display: flex;
  margin: 0 0 22px;
  align-items: center;
  gap: 12px;
}

.search-wrap {
  position: relative;
  min-width: 230px;
  flex: 1;
}

.search-wrap::before {
  position: absolute;
  top: 50%;
  left: 14px;
  color: var(--faint);
  font: 700 13px/1 var(--mono);
  content: "/";
  transform: translateY(-50%);
}

.catalog-search {
  width: 100%;
  height: 42px;
  padding: 0 14px 0 38px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  background: var(--paper);
  outline: none;
}

.catalog-search::placeholder {
  color: var(--faint);
}

.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.filter-chip {
  height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--muted);
  background: var(--paper);
  font: 680 10.5px/1 var(--mono);
  cursor: pointer;
}

.filter-chip:hover,
.filter-chip.is-active {
  color: var(--purple);
  border-color: color-mix(in srgb, var(--purple) 45%, var(--line));
  background: var(--purple-soft);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.catalog-card {
  position: relative;
  display: flex;
  min-height: 276px;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--ink) !important;
  background: var(--paper);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.catalog-card:hover {
  border-color: color-mix(in srgb, var(--purple) 50%, var(--line));
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.catalog-card[hidden] {
  display: none;
}

.catalog-card__top {
  display: flex;
  padding: 17px 18px 0;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.catalog-card__category {
  color: var(--purple);
  font: 740 10px/1.2 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.catalog-card__index {
  color: var(--faint);
  font: 680 10px/1 var(--mono);
}

.catalog-card__body {
  padding: 27px 18px 20px;
  flex: 1;
}

.catalog-card h3 {
  margin: 0 0 9px;
  font-size: 21px;
  line-height: 1.16;
  letter-spacing: -.02em;
}

.catalog-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

.catalog-card__skills {
  display: flex;
  padding: 0 18px 17px;
  flex-wrap: wrap;
  gap: 6px;
}

.catalog-card__skills span,
.lesson-pill {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--muted);
  background: var(--paper-2);
  font: 650 9.5px/1.2 var(--mono);
}

.catalog-card__footer {
  display: flex;
  padding: 12px 18px;
  align-items: center;
  gap: 11px;
  border-top: 1px solid var(--line);
  background: var(--paper-2);
}

.catalog-progress {
  height: 4px;
  overflow: hidden;
  flex: 1;
  border-radius: 99px;
  background: var(--line);
}

.catalog-progress span {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: var(--purple);
}

.catalog-card__footer small {
  color: var(--faint);
  font: 650 9.5px/1 var(--mono);
}

.catalog-empty {
  display: none;
  padding: 34px;
  border: 1px dashed var(--strong);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
  grid-column: 1 / -1;
}

.catalog-empty.is-visible {
  display: block;
}

.resource-strip {
  display: grid;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.resource-link {
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink) !important;
  background: var(--paper);
  text-decoration: none;
}

.resource-link:hover {
  border-color: var(--strong);
}

.resource-link small {
  display: block;
  margin-bottom: 5px;
  color: var(--purple);
  font: 700 9.5px/1 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.resource-link strong {
  display: block;
  margin-bottom: 3px;
}

.resource-link span {
  color: var(--muted);
  font-size: 12px;
}

.lesson-hero__inner {
  position: relative;
  z-index: 1;
  padding: 44px 0 42px;
}

.lesson-crumbs {
  margin-bottom: 36px;
  color: var(--muted);
  font: 650 11px/1.4 var(--mono);
}

.lesson-crumbs a {
  color: inherit;
}

.lesson-hero h1 {
  max-width: 880px;
  font-size: clamp(36px, 5.8vw, 66px) !important;
}

.lesson-meta {
  display: flex;
  margin-top: 24px;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.lesson-progress {
  display: flex;
  min-width: 190px;
  margin-left: 8px;
  align-items: center;
  gap: 9px;
}

.lesson-progress__track {
  width: 112px;
  height: 5px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--line);
}

.lesson-progress__track span {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: var(--purple);
  transition: width .2s ease;
}

.lesson-progress small {
  color: var(--faint);
  font: 650 9.5px/1 var(--mono);
  white-space: nowrap;
}

.lesson-shell {
  display: grid;
  padding: 34px 0 100px;
  grid-template-columns: 238px minmax(0, 1fr);
  gap: 48px;
}

.lesson-rail {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 112px);
  overflow: auto;
  scrollbar-width: thin;
}

.rail-card {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.rail-card + .rail-card {
  margin-top: 12px;
}

.rail-title {
  display: flex;
  margin-bottom: 9px;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--faint);
  font: 750 9.5px/1.3 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.rail-title button {
  padding: 0;
  border: 0;
  color: var(--faint);
  background: transparent;
  font: 650 9px/1 var(--mono);
  cursor: pointer;
  text-transform: none;
}

.rail-title button:hover {
  color: var(--ink);
}

.toc {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc li + li {
  margin-top: 2px;
}

.toc label,
.toc-item {
  display: grid;
  padding: 5px 4px;
  align-items: start;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 6px;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
}

.toc label:hover,
.toc-item:hover {
  color: var(--ink);
  background: var(--paper-2);
}

.toc input {
  width: 13px;
  height: 13px;
  margin: 3px 0 0;
  accent-color: var(--purple);
}

.toc a {
  color: inherit !important;
  font-size: 11.5px;
  line-height: 1.4;
  text-decoration: none;
}

.toc label:has(input:checked) a,
.toc-item:has(input:checked) a {
  color: var(--faint) !important;
  text-decoration: line-through;
}

.toc a[aria-current="location"] {
  color: var(--purple) !important;
  font-weight: 720;
}

.rail-path a {
  display: block;
  padding: 6px 7px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 11.5px;
  text-decoration: none;
}

.rail-path a:hover {
  color: var(--ink);
  background: var(--paper-2);
}

.rail-complete {
  width: 100%;
  margin-top: 10px;
}

.mobile-outline {
  display: none;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.mobile-outline summary {
  padding: 12px 14px;
  color: var(--ink);
  font: 700 11px/1.3 var(--mono);
  cursor: pointer;
}

.mobile-outline .toc {
  padding: 0 10px 12px;
}

.lesson-main {
  min-width: 0;
}

.lesson-article {
  max-width: 880px;
  color: var(--ink);
}

.lesson-article > :first-child {
  margin-top: 0 !important;
}

.lesson-article h1,
.lesson-article .mark,
.lesson-article > .subtitle,
.lesson-article > .brandline,
.lesson-article > .hero,
.lesson-article > header,
.lesson-article > nav,
.lesson-article > footer {
  display: none !important;
}

.lesson-article h2,
.lesson-article .sec-head h2 {
  margin: 54px 0 13px !important;
  padding: 0 !important;
  border: 0 !important;
  color: var(--ink) !important;
  font-size: clamp(27px, 4vw, 40px) !important;
  font-weight: 760 !important;
  line-height: 1.16 !important;
  letter-spacing: -.027em !important;
  text-wrap: balance;
}

.lesson-article h2:first-of-type,
.lesson-article section:first-child h2 {
  margin-top: 8px !important;
}

.lesson-article h2 .tick,
.lesson-article .sec-num {
  display: inline-grid;
  width: 29px;
  height: 29px;
  margin-right: 9px;
  place-items: center;
  border-radius: 8px;
  color: #fff !important;
  background: var(--purple);
  font: 760 10px/1 var(--mono) !important;
  vertical-align: 5px;
}

.lesson-article h3 {
  margin: 31px 0 9px !important;
  color: var(--ink) !important;
  font-size: 20px !important;
  font-weight: 730 !important;
  line-height: 1.25 !important;
}

.lesson-article h4 {
  margin: 23px 0 7px !important;
  color: var(--ink) !important;
  font-size: 15px !important;
}

.lesson-article p {
  margin: 10px 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.68;
}

.lesson-article .muted,
.lesson-article .subtitle,
.lesson-article .goal,
.lesson-article .where {
  color: var(--muted) !important;
}

.lesson-article .where {
  margin-bottom: 5px;
  font: 680 10.5px/1.4 var(--mono);
  letter-spacing: .05em;
}

.lesson-article ul,
.lesson-article ol {
  margin: 13px 0 18px !important;
  padding-left: 25px !important;
  color: var(--ink);
  font-size: 15px !important;
  line-height: 1.66 !important;
}

.lesson-article li + li {
  margin-top: 7px;
}

.lesson-article li::marker {
  color: var(--purple);
  font-family: var(--mono);
  font-weight: 750;
}

.lesson-article .steps {
  padding-left: 28px !important;
}

.lesson-article .step {
  color: var(--purple) !important;
  font-family: var(--mono) !important;
  font-weight: 750 !important;
}

.lesson-article div.step {
  display: flex !important;
  margin-bottom: -2px;
  align-items: center;
  gap: 9px;
  font-size: 11px !important;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.lesson-article div.step b {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--purple);
}

.lesson-article code,
.lesson-article pre,
.lesson-article kbd {
  font-family: var(--mono) !important;
}

.lesson-article :not(pre) > code {
  padding: 1px 5px !important;
  border: 1px solid var(--line) !important;
  border-radius: 5px !important;
  color: var(--purple) !important;
  background: var(--paper-2) !important;
  font-size: .88em !important;
}

.code-shell {
  position: relative;
  overflow: hidden;
  margin: 18px 0 22px !important;
  border: 1px solid var(--line) !important;
  border-radius: 9px !important;
  background: #111820 !important;
  box-shadow: var(--shadow);
}

.code-head {
  display: flex;
  min-height: 35px;
  padding: 7px 8px 7px 13px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #26313b;
  color: #8797a3;
  background: #0d1319;
  font: 650 10px/1.2 var(--mono);
}

.code-head .file {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.copy {
  padding: 5px 8px !important;
  border: 1px solid #34414c !important;
  border-radius: 5px !important;
  color: #aab6bf !important;
  background: #151e26 !important;
  font: 650 9.5px/1 var(--mono) !important;
  cursor: pointer;
}

.copy:hover {
  color: #fff !important;
  border-color: #566675 !important;
}

.code-shell pre,
.lesson-article pre {
  margin: 0 !important;
  padding: 16px 18px !important;
  overflow: auto !important;
  border: 0 !important;
  border-radius: 0 !important;
  color: #d8e2e9 !important;
  background: #111820 !important;
  font-size: 12.5px !important;
  line-height: 1.58 !important;
  tab-size: 2;
}

.lesson-article pre code {
  padding: 0 !important;
  border: 0 !important;
  color: inherit !important;
  background: transparent !important;
  font-size: inherit !important;
}

.lesson-article kbd {
  padding: 2px 6px;
  border: 1px solid var(--strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--ink);
  background: var(--paper);
  font-size: 11px;
}

.lesson-article table {
  width: 100% !important;
  margin: 18px 0 24px !important;
  overflow: hidden;
  border: 1px solid var(--line) !important;
  border-collapse: separate !important;
  border-spacing: 0 !important;
  border-radius: 9px;
  color: var(--ink);
  background: var(--paper) !important;
  font-size: 12.5px !important;
}

.lesson-article th,
.lesson-article td {
  padding: 10px 12px !important;
  border: 0 !important;
  border-right: 1px solid var(--line) !important;
  border-bottom: 1px solid var(--line) !important;
  color: var(--ink) !important;
  background: transparent !important;
  text-align: left;
  vertical-align: top;
}

.lesson-article th {
  color: var(--muted) !important;
  background: var(--paper-2) !important;
  font: 720 10px/1.35 var(--mono) !important;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.lesson-article tr:last-child td {
  border-bottom: 0 !important;
}

.lesson-article th:last-child,
.lesson-article td:last-child {
  border-right: 0 !important;
}

.lesson-article .grid,
.lesson-article .tutorial-grid,
.lesson-article .api {
  display: grid !important;
  margin: 20px 0 !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  gap: 12px !important;
}

.lesson-article .tutorial-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
}

.lesson-article .card,
.lesson-article .tutorial-card,
.lesson-article .panel {
  padding: 17px !important;
  border: 1px solid var(--line) !important;
  border-radius: 10px !important;
  color: var(--ink) !important;
  background: var(--paper) !important;
  box-shadow: var(--shadow) !important;
}

.lesson-article .tutorial-card {
  text-decoration: none;
}

.lesson-article .tutorial-card:hover {
  border-color: var(--purple) !important;
}

.lesson-article .card p,
.lesson-article .tutorial-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.lesson-article .tutorial-card .num,
.lesson-article .tutorial-card .time,
.lesson-article .card .big {
  color: var(--purple) !important;
  font-family: var(--mono) !important;
  font-weight: 750 !important;
}

.lesson-article .callout,
.lesson-article .note,
.lesson-article .tip,
.lesson-article .chk,
.lesson-article .result,
.lesson-article blockquote {
  margin: 20px 0 !important;
  padding: 15px 17px !important;
  border: 1px solid var(--line) !important;
  border-left: 4px solid var(--blue) !important;
  border-radius: 8px !important;
  color: var(--ink) !important;
  background: var(--blue-soft) !important;
  font-size: 13.5px !important;
}

.lesson-article .note,
.lesson-article .callout.warn {
  border-left-color: var(--amber) !important;
  background: var(--amber-soft) !important;
}

.lesson-article .chk,
.lesson-article .callout.ok,
.lesson-article .result {
  border-left-color: var(--green) !important;
  background: var(--green-soft) !important;
}

.lesson-article blockquote > :first-child,
.lesson-article .callout > :first-child,
.lesson-article .note > :first-child,
.lesson-article .tip > :first-child,
.lesson-article .chk > :first-child {
  margin-top: 0;
}

.lesson-article blockquote > :last-child,
.lesson-article .callout > :last-child,
.lesson-article .note > :last-child,
.lesson-article .tip > :last-child,
.lesson-article .chk > :last-child {
  margin-bottom: 0;
}

.lesson-article .imgph {
  position: relative;
  margin: 19px 0 !important;
  padding: 20px 20px 20px 58px !important;
  border: 1px dashed var(--strong) !important;
  border-radius: 9px !important;
  color: var(--muted) !important;
  background: var(--paper-2) !important;
  font: 650 11px/1.5 var(--mono) !important;
  text-align: left !important;
}

.lesson-article .imgph::before {
  position: absolute;
  top: 16px;
  left: 17px;
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border-radius: 7px;
  color: var(--purple);
  background: var(--purple-soft);
  content: "◎";
  font: 800 15px/1 var(--mono);
}

.lesson-article .tree,
.lesson-article pre.diagram {
  border-left: 3px solid var(--purple) !important;
}

.lesson-article section {
  padding: 0 0 26px !important;
  border: 0 !important;
}

.lesson-article .sec-head {
  display: flex !important;
  margin-top: 48px !important;
  align-items: center !important;
  gap: 0 !important;
}

.lesson-article .sec-head h2 {
  flex: 0 1 auto;
}

.lesson-article .sec-head .rule {
  height: 1px;
  margin: 42px 0 0 18px;
  flex: 1;
  background: var(--line);
}

.lesson-article .next {
  display: flex;
  margin: 32px 0 10px;
  justify-content: space-between;
  gap: 14px;
}

.lesson-article .next a {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: var(--paper);
  font: 650 10.5px/1.3 var(--mono);
  text-decoration: none;
}

.lesson-article .next a:hover {
  color: var(--ink);
  border-color: var(--strong);
}

.lesson-pager {
  display: grid;
  max-width: 880px;
  margin-top: 64px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.lesson-pager a {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink) !important;
  background: var(--paper);
  text-decoration: none;
}

.lesson-pager a:last-child {
  text-align: right;
}

.lesson-pager a:hover {
  border-color: color-mix(in srgb, var(--purple) 45%, var(--line));
}

.lesson-pager small {
  display: block;
  margin-bottom: 5px;
  color: var(--faint);
  font: 680 9px/1 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}

.lesson-pager strong {
  font-size: 13px;
}

.learning-footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.learning-footer__inner {
  display: flex;
  min-height: 110px;
  padding: 25px 0;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 12px;
}

.learning-footer a {
  color: var(--muted);
}

.learning-footer__meta {
  font: 650 10px/1.4 var(--mono);
}

@media (max-width: 980px) {
  .home-hero__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-stats {
    max-width: 560px;
  }

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

  .pathway-grid {
    grid-template-columns: 1fr 44px 1fr;
  }

  .pathway-card:last-child {
    margin-top: 14px;
    grid-column: 1 / -1;
  }

  .pathway-arrow:nth-of-type(2) {
    display: none;
  }

  .lesson-shell {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 30px;
  }

  .learning-nav {
    display: none;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 78px;
  }

  .learning-header__inner,
  .home-hero__inner,
  .lesson-hero__inner,
  .learning-main,
  .lesson-shell,
  .learning-footer__inner {
    width: min(100% - 28px, 1200px);
  }

  .learning-brand small,
  .learning-button--print {
    display: none;
  }

  .home-hero__inner {
    min-height: auto;
    padding: 56px 0 46px;
  }

  .home-hero h1,
  .lesson-hero h1 {
    font-size: clamp(36px, 12vw, 54px) !important;
  }

  .hero-stats {
    width: 100%;
  }

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 9px;
  }

  .resume-card {
    align-items: flex-start;
  }

  .resume-card .learning-button {
    align-self: center;
  }

  .pathway-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .pathway-card:last-child {
    margin-top: 0;
    grid-column: auto;
  }

  .pathway-arrow {
    height: 28px;
    transform: rotate(90deg);
  }

  .pathway-arrow:nth-of-type(2) {
    display: grid;
  }

  .catalog-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .catalog-card {
    min-height: 250px;
  }

  .resource-strip {
    grid-template-columns: 1fr;
  }

  .lesson-crumbs {
    margin-bottom: 28px;
  }

  .lesson-progress {
    width: 100%;
    margin: 6px 0 0;
  }

  .lesson-progress__track {
    flex: 1;
  }

  .lesson-shell {
    display: block;
    padding-top: 22px;
  }

  .lesson-rail {
    display: none;
  }

  .mobile-outline {
    display: block;
  }

  .lesson-article h2,
  .lesson-article .sec-head h2 {
    font-size: 28px !important;
  }

  .lesson-article .grid,
  .lesson-article .tutorial-grid,
  .lesson-article .api {
    grid-template-columns: 1fr !important;
  }

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

  .lesson-article .sec-head .rule {
    display: none;
  }

  .lesson-pager {
    grid-template-columns: 1fr;
  }

  .lesson-pager a:last-child {
    text-align: left;
  }

  .learning-footer__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

@media (max-width: 440px) {
  .learning-actions .learning-button span {
    display: none;
  }

  .hero-stat {
    padding: 14px;
  }

  .resume-card__icon {
    display: none;
  }

  .resume-card {
    flex-wrap: wrap;
  }

  .resume-card .learning-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }

  .catalog-card:hover,
  .pathway-card:hover {
    transform: none;
  }
}

@media print {
  :root,
  :root[data-theme="dark"] {
    color-scheme: light;
    --bg: #fff;
    --paper: #fff;
    --paper-2: #f5f5f5;
    --ink: #111;
    --muted: #555;
    --faint: #777;
    --line: #ccc;
    --purple: #5d31aa;
    --purple-soft: #f2edfb;
    --blue-soft: #edf7fa;
    --green-soft: #eaf8f1;
    --amber-soft: #fff7e6;
    --shadow: none;
  }

  .learning-header,
  .lesson-rail,
  .mobile-outline,
  .lesson-pager,
  .learning-footer,
  .copy,
  .home-hero::before,
  .home-hero::after,
  .lesson-hero::before,
  .lesson-hero::after {
    display: none !important;
  }

  .lesson-hero {
    border: 0;
  }

  .lesson-hero__inner {
    width: 100%;
    padding: 0 0 22px;
  }

  .lesson-shell {
    display: block;
    width: 100%;
    padding: 0;
  }

  .lesson-article {
    max-width: none;
  }

  .lesson-article h2,
  .lesson-article h3 {
    break-after: avoid;
  }

  .code-shell,
  .lesson-article table,
  .lesson-article .callout,
  .lesson-article .note,
  .lesson-article .tip,
  .lesson-article .chk {
    break-inside: avoid;
  }

  a {
    color: inherit !important;
    text-decoration: none !important;
  }
}