@font-face {
  font-family: Geist;
  src: url("fonts/geist.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("fonts/instrument-serif.woff2") format("woff2");
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("fonts/instrument-serif-italic.woff2") format("woff2");
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono.woff2") format("woff2");
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f7f6f0;
  --surface: #fcfbf7;
  --ink: #17241b;
  --muted: #526056;
  --quiet: #59665b;
  --green: #28583d;
  --green-dark: #173c29;
  --line: #dcded3;
  --light-green: #e8eee4;
  --display: "Instrument Serif", Georgia, serif;
  --body: Geist, Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --gutter: clamp(20px, 5.4vw, 92px);
  --radius: 8px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: 24px; }
body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background: var(--paper);
  font: 400 16px/1.5 var(--body);
}
main { flex: 1; }
img { display: block; max-width: 100%; }
button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
::selection { background: #d9e8d5; color: var(--ink); }
:focus-visible { outline: 2px solid #2c7750; outline-offset: 4px; }
.shell { width: min(1280px, calc(100% - 2 * var(--gutter))); margin-inline: auto; }
.sr-only, .skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus {
  position: fixed;
  z-index: 5;
  inset: 12px auto auto 12px;
  padding: 10px 16px;
  color: #fff;
  background: var(--green-dark);
}

.site-header { border-bottom: 1px solid var(--line); }
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 22px;
  align-items: center;
  min-height: 73px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  justify-self: start;
  text-decoration: none;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -.045em;
}
.brand-secondary { color: var(--quiet); font-weight: 500; }
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 7px;
  color: #e5efdf;
  background: var(--green-dark);
}
.brand-mark span {
  position: relative;
  width: 14px;
  height: 14px;
  border: 1px solid currentColor;
  border-radius: 3px;
  background: linear-gradient(currentColor, currentColor) center / 4px 4px no-repeat;
}
.brand-mark span::before, .brand-mark span::after {
  position: absolute;
  content: "";
  inset: -4px 3px;
  border-inline: 1px solid currentColor;
  clip-path: polygon(0 0, 100% 0, 100% 15%, 0 15%, 0 85%, 100% 85%, 100% 100%, 0 100%);
}
.brand-mark span::after { transform: rotate(90deg); }
.site-nav { display: flex; gap: 34px; align-self: stretch; }
.site-nav a {
  position: relative;
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.site-nav a:hover, .site-nav a[aria-current] { color: var(--green-dark); }
.site-nav a[aria-current]::after {
  position: absolute;
  inset: auto 0 -1px;
  height: 2px;
  content: "";
  background: var(--green);
}
.header-actions { display: flex; align-items: center; justify-self: end; gap: 10px; }
.search-trigger {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 9px;
  padding: 0 8px 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  font-size: 13px;
  color: var(--muted);
  background: var(--surface);
}
.search-trigger:hover { border-color: #9caa99; }
kbd { font: 12px/1 var(--mono); }
.search-trigger kbd {
  padding: 4px 6px;
  margin-left: 13px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper);
}
.menu-toggle, .plain-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: var(--surface);
}
.menu-toggle { display: none; }

.icon { position: relative; display: inline-block; width: 18px; height: 18px; flex: 0 0 auto; vertical-align: middle; }
.icon::before, .icon::after { position: absolute; content: ""; }
.icon-search::before { inset: 2px 5px 5px 2px; border: 1.5px solid; border-radius: 50%; }
.icon-search::after { width: 6px; height: 1.5px; right: 1px; bottom: 3px; background: currentColor; transform: rotate(45deg); }
.icon-menu::before { inset: 4px 1px auto; height: 1.5px; background: currentColor; box-shadow: 0 4px, 0 8px; }
.icon-close::before, .icon-close::after { inset: 8px 1px auto; height: 1.5px; background: currentColor; transform: rotate(45deg); }
.icon-close::after { transform: rotate(-45deg); }
.icon-book::before, .icon-book::after { inset: 3px 9px 3px 0; border: 1.4px solid; border-radius: 2px 2px 0 2px; transform: skewY(9deg); }
.icon-book::after { inset: 3px 0 3px 9px; border-radius: 2px 2px 2px 0; transform: skewY(-9deg); }
.icon-terminal { border: 1.4px solid; border-radius: 3px; height: 15px; }
.icon-terminal::before { inset: 4px auto auto 3px; width: 4.5px; height: 4.5px; border-top: 1.3px solid; border-right: 1.3px solid; transform: rotate(45deg); }
.icon-terminal::after { inset: auto 3px 4px auto; width: 5px; height: 1.3px; background: currentColor; }
.icon-layers::before, .icon-layers::after { left: 3.5px; width: 11px; height: 11px; border: 1.4px solid; border-radius: 2px; transform: rotate(45deg) skew(-8deg, -8deg); }
.icon-layers::before { top: 1px; }
.icon-layers::after { top: 5px; border-left-color: transparent; border-top-color: transparent; }
.icon-sliders {
  background: linear-gradient(currentColor, currentColor) 0 4px / 18px 1.4px no-repeat,
    linear-gradient(currentColor, currentColor) 0 12px / 18px 1.4px no-repeat;
}
.icon-sliders::before, .icon-sliders::after { width: 4px; height: 6px; top: 2px; left: 5px; border: 1px solid; border-radius: 1px; background: var(--icon-bg, var(--paper)); }
.icon-sliders::after { top: 10px; left: 10px; }
.icon-check::before { top: 3px; left: 5px; width: 6px; height: 10px; border: solid currentColor; border-width: 0 1.7px 1.7px 0; transform: rotate(42deg); }
.arrow { display: inline-block; font-family: Arial, sans-serif; font-size: 1.14em; line-height: 1; }

.home { padding-block: clamp(36px, 5.05vw, 78px) 76px; }
.home-hero {
  display: grid;
  grid-template-columns: minmax(0, .97fr) minmax(0, 1.03fr);
  align-items: center;
  gap: clamp(32px, 4.7vw, 76px);
}
.eyebrow {
  color: var(--green);
  font: 400 11px/1.35 var(--mono);
  letter-spacing: .095em;
  text-transform: uppercase;
}
.eyebrow-line { display: inline-block; vertical-align: middle; width: 22px; height: 1px; margin-right: 11px; background: currentColor; }
.hero-copy h1, .page-intro h1, .lesson-header h1 {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.hero-copy h1 {
  margin-block: 18px 21px;
  font-size: clamp(66px, 7.18vw, 112px);
  line-height: .9;
}
.hero-copy h1 em { color: var(--green); font-weight: 400; }
.hero-description {
  max-width: 425px;
  color: var(--muted);
  font-size: clamp(16px, 1.36vw, 19px);
  line-height: 1.63;
  text-wrap: pretty;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  width: fit-content;
  min-height: 45px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
  transition: background .16s, border-color .16s;
}
.button-primary { background: var(--green-dark); color: #f8fcf4; }
.button-primary:hover { background: #29583d; }
.button-secondary { border-color: #d2d8cc; background: var(--surface); }
.button-secondary:hover { border-color: #9caa99; background: var(--light-green); }
.hero-visual {
  min-width: 0;
  padding: 9px 9px 0;
  border: 1px solid #253b2a;
  border-radius: 11px;
  color: #e4eddd;
  background: #101f16;
}
.hero-image-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid #425743;
  border-radius: 4px;
  background: #14271a;
}
.hero-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 1.68;
  object-fit: cover;
  object-position: center 51%;
}
.hero-corner { position: absolute; width: 17px; height: 17px; border-color: #d1e5ba; border-style: solid; border-width: 0; opacity: .8; }
.corner-tl { top: 12px; left: 12px; border-top-width: 1px; border-left-width: 1px; }
.corner-tr { top: 12px; right: 12px; border-top-width: 1px; border-right-width: 1px; }
.corner-bl { bottom: 12px; left: 12px; border-bottom-width: 1px; border-left-width: 1px; }
.corner-br { bottom: 12px; right: 12px; border-bottom-width: 1px; border-right-width: 1px; }
.hero-visual figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px 14px;
  flex-wrap: wrap;
  min-height: 43px;
  padding: 7px 8px 7px 10px;
  color: #bfcebe;
  font-size: 11px;
}
.caption-title { color: #d3e5c9; font: 10px/1.4 var(--mono); letter-spacing: .095em; }
.guide-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  margin-top: clamp(37px, 4.2vw, 65px);
  padding-block: 17px;
  border-block: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.guide-facts > span { display: flex; align-items: center; gap: 9px; padding-inline: 23px; border-right: 1px solid var(--line); }
.guide-facts > span:first-child { padding-left: 0; }
.guide-facts > span:last-child { border: 0; }
.guide-facts .icon { color: var(--green); transform: scale(.86); }
.guide-facts strong { font-weight: 500; }

.paths-section { margin-top: 43px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 22px; }
.section-heading h2, .first-run h2, .lesson-group-heading h2, .roadmap-current h2, .roadmap-planned h2 {
  font: 400 clamp(38px, 4vw, 56px)/.98 var(--display);
  letter-spacing: -.022em;
}
.section-heading p { margin-top: 8px; font-size: 15px; color: var(--muted); }
.text-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  text-decoration: none;
}
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.section-heading > .text-link { flex-shrink: 0; margin-bottom: 1px; }
.path-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.path-card {
  display: flex;
  flex-direction: column;
  align-items: start;
  min-width: 0;
  padding: 18px 19px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--surface);
  text-decoration: none;
  transition: border-color .16s, background .16s, transform .16s;
}
.path-card:hover { transform: translateY(-3px); border-color: #a6b8a3; background: #fffef9; }
.path-icon {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 7px;
  background: var(--icon-bg);
}
.tone-moss { --icon-bg: #e0eadc; color: #355b3c; }
.tone-sand { --icon-bg: #eee5d0; color: #6a521d; }
.tone-sage { --icon-bg: #e2ebe7; color: #34594e; }
.tone-clay { --icon-bg: #f0e4db; color: #744a35; }
.path-card h3 { margin-top: 12px; font-size: 19px; font-weight: 650; letter-spacing: -.04em; line-height: 1.2; }
.path-card p { margin-block: 6px 15px; color: var(--muted); font-size: 14px; line-height: 1.48; }
.path-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--green);
  font: 11px/1.4 var(--mono);
}
.path-card-footer .arrow { font-size: 18px; }

.first-run {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 30px;
  margin-top: 51px;
  padding: clamp(22px, 3.5vw, 46px);
  border: 1px solid #d6e0d3;
  border-radius: var(--radius);
  background: var(--light-green);
}
.first-run h2 { margin-top: 9px; font-size: clamp(34px, 3.4vw, 48px); }
.first-run-copy > p:not(.eyebrow) { max-width: 400px; margin-block: 10px 16px; color: var(--muted); font-size: 15px; }
.quickstart-terminal, .code-sample {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #304337;
  border-radius: var(--radius);
  background: #18271e;
  color: #eff6e9;
}
.terminal-top, .code-top {
  display: flex;
  min-height: 43px;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 13px;
  border-bottom: 1px solid #405244;
  color: #c5d5c4;
  font: 11px/1.5 var(--mono);
}
.terminal-top .icon { margin-right: 4px; transform: scale(.8); }
.copy-button {
  padding: 3px 9px;
  border: 1px solid #647367;
  border-radius: 4px;
  background: transparent;
  color: #f5f9f2;
  font: 11px/1.5 var(--mono);
}
.copy-button:hover { background: #34493a; }
.copy-button:focus-visible, .code-sample pre:focus-visible { outline-color: #aad9a2; outline-offset: -1px; }
.quickstart-terminal pre { margin: 0; padding: 19px 15px 5px; overflow-x: auto; font: 13px/1.6 var(--mono); }
.quickstart-terminal > p { padding: 4px 15px 15px; color: #c5d5c4; font: 11px/1.6 var(--mono); }
.terminal-prompt { color: #a9ce8c; }

.site-footer { border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px 28px; min-height: 92px; padding-block: 18px; }
.footer-inner .brand-mark { width: 26px; height: 26px; }
.footer-inner .brand { font-size: 14px; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 12px 25px; color: var(--muted); font-size: 13px; }
.footer-inner nav a { text-decoration: none; }
.footer-inner nav a:hover { text-decoration: underline; }

.inner-page { padding-block: 25px 74px; }
.breadcrumbs { margin-bottom: 34px; color: var(--muted); font-size: 12px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; list-style: none; gap: 5px 9px; padding: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 9px; color: #778579; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; text-underline-offset: 3px; }
.breadcrumbs [aria-current] { color: var(--ink); }
.page-intro { max-width: 800px; margin-bottom: 35px; }
.page-intro h1 { font-size: clamp(53px, 7vw, 91px); line-height: .98; text-wrap: initial; }
.page-intro .eyebrow { margin-bottom: 12px; }
.page-description { max-width: 660px; margin-top: 12px; color: var(--muted); font-size: clamp(16px, 1.65vw, 20px); line-height: 1.55; }

.library { max-width: 1050px; }
.library-tools { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px 24px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.path-tabs { display: flex; flex-wrap: wrap; gap: 7px; }
.path-tabs a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--green-dark);
  background: var(--surface);
  text-decoration: none;
  font-size: 13px;
  font-weight: 550;
}
.path-tabs a:hover { background: var(--light-green); }
.path-tabs a[aria-current] { color: #fff; background: var(--green-dark); border-color: var(--green-dark); }
.library-progress { display: flex; align-items: center; gap: 8px; color: var(--muted); font: 11px/1.5 var(--mono); }
.library-progress progress { width: 66px; height: 8px; accent-color: var(--green); }
.library-next { display: flex; align-items: baseline; flex-wrap: wrap; gap: 6px 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.library-heading { font: 400 38px/1 var(--display); }
.library-paths {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}
.library-path {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-content: start;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.library-path h3 { font-size: 19px; line-height: 1.25; }
.library-path h3 a { text-underline-offset: 3px; }
.library-path p { margin-top: 4px; color: var(--muted); font-size: 14px; }
.library-path > .eyebrow { margin-top: 4px; }
.library-path ul { grid-column: 1 / -1; list-style: none; padding: 0; }
.library-path li { border-top: 1px solid var(--line); }
.library-path li a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 9px 4px;
  color: var(--green-dark);
  font-size: 14px;
  text-decoration: none;
}
.library-path li a:hover { background: var(--light-green); }
.topic-count { display: inline-flex; align-items: center; gap: 9px; font: 12px/1 var(--mono); }
.topic-jumps { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 18px; }
.topic-jumps a, .lesson-return a { color: var(--green-dark); text-underline-offset: 3px; }
.topic-jumps a { font-size: 13px; }
.lesson-group { margin-top: 32px; }
.lesson-group-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.lesson-group-heading h2 { font-size: clamp(32px, 3.5vw, 44px); }
.lesson-group-heading > span { flex: 0 0 auto; }
.project-sequences { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 8px; }
.project-sequences details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.project-sequences summary { padding: 11px 14px; color: var(--green-dark); cursor: pointer; font-weight: 650; }
.project-sequences ol { display: grid; gap: 6px; margin: 0; padding: 0 14px 14px 37px; font-size: 14px; }
.project-sequences a { color: var(--green-dark); text-underline-offset: 3px; }
.lesson-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
}
.lesson-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 8px;
  padding: 15px 16px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.lesson-card:hover { border-color: var(--green); }
.lesson-card h3 { font-size: 17px; letter-spacing: -.02em; line-height: 1.25; }
.lesson-card h3 a { text-decoration: none; }
.lesson-card h3 a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.lesson-card h3 a:focus-visible { outline: none; }
.lesson-card h3 a:focus-visible::after { outline: 2px solid var(--green); outline-offset: 3px; }
.lesson-card-meta { display: flex; gap: 7px; color: var(--muted); font: 11px/1.45 var(--mono); }
.lesson-card-description { color: var(--muted); font-size: 14px; line-height: 1.45; }
.lesson-card-footer { margin-top: auto; padding-top: 8px; color: var(--green-dark); font-size: 13px; font-weight: 600; }
.lesson-card-open, .lesson-card-complete { display: flex; align-items: center; gap: 7px; }
.lesson-card-complete, .is-completed > .lesson-card-open { display: none; }
.is-completed > .lesson-card-complete { display: flex; }

.reader-grid {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(138px, 210px);
  justify-content: center;
  align-items: start;
  gap: clamp(20px, 3vw, 55px);
}
.reader-grid:not(:has(.reader-toc)) { grid-template-columns: minmax(0, 760px); }
.lesson { min-width: 0; }
.reader-toc ol { list-style: none; padding: 0; }
.reader-toc a {
  display: flex;
  justify-content: space-between;
  gap: 4px;
  padding: 7px 8px;
  border-radius: 4px;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}
.reader-toc a:hover { color: var(--green-dark); background: var(--light-green); }
.reader-toc { position: sticky; top: 22px; padding-left: 12px; border-left: 1px solid var(--line); }
.reader-toc p { margin: 4px 8px 8px; }
.reader-toc a { padding-block: 5px; }
.reader-contents { display: none; margin-top: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.reader-contents summary { padding: 9px 12px; color: var(--green-dark); font-size: 13px; font-weight: 600; cursor: pointer; }
.reader-contents ol { padding: 0 12px 8px; list-style: none; }
.reader-contents a { display: block; padding-block: 6px; color: var(--green-dark); font-size: 13px; text-underline-offset: 3px; }
.lesson-header { padding-bottom: 21px; border-bottom: 1px solid var(--line); }
.lesson-meta { display: flex; gap: 9px; align-items: center; }
.lesson-meta span { width: 4px; height: 4px; border-radius: 50%; background: #798b79; }
.lesson-header h1 { margin-block: 10px 12px; font-size: clamp(49px, 5.2vw, 79px); line-height: .97; text-wrap: initial; }
.lesson-description { color: var(--muted); font-size: clamp(16px, 1.5vw, 20px); line-height: 1.55; }
.prerequisites { margin-top: 15px; }
.prerequisites ul { display: flex; flex-wrap: wrap; gap: 5px 14px; margin-top: 5px; padding: 0; list-style: none; }
.prerequisites a { color: var(--green-dark); font-size: 13px; text-underline-offset: 3px; }
.lesson-content { font-size: 16px; line-height: 1.72; overflow-wrap: anywhere; }
.lesson-content h2 { margin: 30px 0 8px; font: 400 clamp(29px, 3vw, 43px)/1.05 var(--display); letter-spacing: -.02em; }
.lesson-content p + p, .lesson-content ul, .lesson-content ol, .lesson-content dl { margin-top: 11px; }
.lesson-content a { color: var(--green-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.lesson-content li + li { margin-top: 5px; }
.lesson-content ul, .lesson-content ol { padding-left: 23px; }
.lesson-content code { font-family: var(--mono); font-size: .84em; }
.lesson-content :not(pre) > code { padding: .08em .27em; border-radius: 3px; color: var(--green-dark); background: #e8eee4; }
.lesson-content .definition-list { display: grid; gap: 0; margin-bottom: 12px; border-block: 1px solid var(--line); }
.definition-list div { display: grid; grid-template-columns: minmax(91px, 1fr) 4fr; gap: 10px 16px; padding: 9px 0; }
.definition-list div + div { border-top: 1px solid var(--line); }
.definition-list dt { font-weight: 650; }
.definition-list dd { color: var(--muted); }
.lesson-content .flow-diagram { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 13px; padding: 0; list-style: none; }
.flow-diagram li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  border: 1px solid #d0decf;
  border-radius: 5px;
  color: var(--green-dark);
  background: var(--light-green);
  font-size: 13px;
}
.flow-diagram li:not(:first-child)::before { content: "→"; }
.lesson-content .flow-diagram li + li { margin: 0; }
.lesson-content .code-sample, .lesson-content > pre { margin-block: 13px; }
.lesson-content pre {
  overflow-x: auto;
  padding: 12px 14px;
  margin: 0;
  background: #18271e;
  color: #eff6e9;
  font: 13px/1.65 var(--mono);
}
.lesson-content > pre { border-radius: var(--radius); }
.lesson-content pre code { font: inherit; }
.lesson-example, .lesson-figure { margin-block: 14px; }
.lesson-example details { margin-top: 7px; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.lesson-example summary { color: var(--green-dark); font: 12px/1.6 var(--mono); cursor: pointer; }
.lesson-example pre { margin-top: 8px; border-radius: 5px; }
.lesson-example .code-sample { margin-block: 8px 0; }
.lesson-example .code-sample pre { margin-top: 0; border-radius: 0; }
.lesson-figure img { width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.lesson-figure figcaption { margin-top: 5px; }
.callout, .knowledge-check { margin-top: 18px; padding: 12px 16px; border-radius: 5px; }
.callout { border-left: 3px solid #8da886; background: var(--light-green); }
.callout strong { display: block; margin-bottom: 3px; color: var(--green-dark); }
.callout p, .knowledge-check p { color: var(--muted); }
.callout + p { margin-top: 11px; }
.knowledge-check { border: 1px solid var(--line); background: var(--surface); }
.knowledge-check summary { cursor: pointer; color: var(--green-dark); font-weight: 650; }
.knowledge-check summary + p { margin-top: 7px; }
.lesson-table { width: 100%; margin-block: 14px; border-collapse: collapse; font-size: 14px; text-align: left; }
.lesson-table caption { padding-bottom: 5px; text-align: left; font-weight: 600; }
.lesson-table td, .lesson-table th { padding: 8px; border: 1px solid var(--line); vertical-align: top; }
.lesson-table th { background: var(--light-green); }
.weight-calculator { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 12px; align-items: stretch; margin-block: 14px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.weight-calculator > div { min-width: 0; }
.weight-calculator label, .weight-result span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 12px; font-weight: 550; }
.weight-calculator input, .weight-calculator select {
  width: 100%;
  min-height: 39px;
  border: 1px solid #a9b8aa;
  border-radius: 4px;
  padding: 4px 7px;
  background: var(--paper);
  color: var(--ink);
}
.weight-result { padding-left: 11px; border-left: 1px solid var(--line); }
.weight-result output { color: var(--green-dark); font: 400 clamp(23px, 2.6vw, 38px)/1 var(--display); }
.sources ul { font-size: 14px; }
.lesson-finish { display: flex; align-items: center; flex-wrap: wrap; gap: 9px 14px; margin-top: 24px; }
.lesson-finish p { color: var(--muted); font-size: 13px; }
.complete-button.is-completed { border-color: #b9cbbb; background: var(--light-green); color: var(--green-dark); }
.complete-button.is-completed:hover { background: #dae9d9; }
.lesson-return { margin-top: 22px; padding-top: 15px; border-top: 1px solid var(--line); }
.lesson-return details { margin-top: 12px; color: var(--green-dark); font-size: 14px; }
.lesson-return summary { cursor: pointer; }
.lesson-return ul { padding: 8px 0 0 23px; }
.lesson-return li + li { margin-top: 5px; }
.lesson-kit { margin-block: 13px; padding: 9px 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.lesson-kit > summary { cursor: pointer; color: var(--green-dark); font-weight: 600; }

.glossary-page, .roadmap-page { max-width: 1000px; }
.glossary-index { display: flex; flex-wrap: wrap; gap: 6px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.glossary-index a { display: grid; place-items: center; width: 34px; height: 36px; border: 1px solid var(--line); border-radius: 4px; color: var(--green-dark); background: var(--surface); font: 13px/1 var(--mono); text-decoration: none; }
.glossary-index a:hover { background: var(--light-green); }
.glossary-group { display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 12px; padding-block: 17px; border-bottom: 1px solid var(--line); }
.glossary-group h2 { font: 400 48px/1 var(--display); color: var(--green); }
.glossary-group dl > div { display: grid; grid-template-columns: minmax(110px, .9fr) minmax(0, 3fr); gap: 4px 17px; padding-block: 6px 10px; }
.glossary-group dl > div + div { margin-top: 5px; padding-top: 11px; border-top: 1px solid var(--line); }
.glossary-group dl > div:target { background: var(--light-green); border-radius: 5px; }
.glossary-group dt { font-weight: 650; }
.glossary-group dd { color: var(--muted); }
.glossary-group .text-link { margin-top: 5px; font-size: 12px; }
.roadmap-current { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 24px; border: 1px solid #d6e0d3; border-radius: var(--radius); background: var(--light-green); }
.roadmap-current h2 { margin-block: 8px; font-size: clamp(33px, 4.2vw, 47px); }
.roadmap-current p:not(.eyebrow), .roadmap-planned p { color: var(--muted); }
.roadmap-current a { flex-shrink: 0; }
.roadmap-updates, .roadmap-planned { margin-top: 34px; }
.roadmap-updates h2, .roadmap-planned h2 { margin-bottom: 12px; font: 400 42px/.98 var(--display); letter-spacing: -.022em; }
.roadmap-updates > ol { list-style: none; padding: 0; }
.roadmap-updates article { padding: 15px 0; border-block-end: 1px solid var(--line); }
.roadmap-updates article h3 { margin-block: 3px; font-size: 18px; }
.roadmap-updates article p { color: var(--muted); font-size: 14px; }
.roadmap-updates article ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 22px; margin-top: 9px; padding-inline-start: 18px; }
.roadmap-updates article a { color: var(--green-dark); font-size: 14px; text-underline-offset: 3px; }
.roadmap-planned ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; list-style: none; }
.roadmap-planned li { padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.roadmap-planned h3 { margin-bottom: 5px; font-size: 17px; font-weight: 650; }
.roadmap-planned p { font-size: 14px; }

.search-dialog {
  width: min(560px, calc(100% - 30px));
  max-height: min(75vh, 620px);
  margin: min(13vh, 105px) auto auto;
  padding: 0;
  border: 1px solid #c4d1c2;
  border-radius: 9px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 14px 55px #101f162e;
}
.search-dialog::backdrop { background: #13221bc0; }
.search-panel { padding: 16px; }
.search-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 11px; }
.search-heading h2 { font: 400 36px/1 var(--display); }
.search-field { display: flex; align-items: center; gap: 10px; padding: 0 10px; border: 1px solid #b3c2b2; border-radius: 5px; background: var(--surface); }
.search-field:focus-within { outline: 2px solid #2c7750; outline-offset: 2px; }
.search-field input { min-width: 0; width: 100%; min-height: 41px; padding: 0; border: 0; outline: 0; color: var(--ink); background: transparent; }
.search-status { margin-top: 9px; color: var(--muted); font-size: 12px; }
.search-results { list-style: none; padding: 0; }
.search-results li + li { border-top: 1px solid var(--line); }
.search-results a { display: block; padding: 9px 6px; border-radius: 4px; text-decoration: none; }
.search-results a:hover, .search-results a:focus-visible { background: var(--light-green); }
.search-results a strong { display: block; font-size: 15px; }
.search-results a > span:last-child { display: block; color: var(--muted); font-size: 13px; }

@media (max-width: 1100px) {
  .hero-copy h1 { font-size: clamp(59px, 8vw, 90px); }
  .reader-grid { grid-template-columns: minmax(0, 760px); }
  .reader-toc { display: none; }
  .reader-contents { display: block; }
}

@media (max-width: 850px) {
  .header-inner { gap: 15px; }
  .site-nav { gap: 20px; }
  .search-trigger kbd { display: none; }
  .home-hero { gap: 25px; }
  .hero-copy h1 { font-size: clamp(53px, 8.2vw, 73px); }
  .hero-visual img { aspect-ratio: 1.39; }
  .path-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lesson-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 650px) {
  .header-inner { grid-template-columns: minmax(0, 1fr) auto; gap: 0 8px; min-height: 62px; }
  .brand { min-height: 60px; font-size: 15px; }
  .header-actions { grid-area: 1 / 2; }
  .search-trigger { min-width: 39px; min-height: 40px; justify-content: center; padding: 0; }
  .search-trigger-label { display: none; }
  .has-js .menu-toggle { display: grid; }
  .site-nav { grid-column: 1 / -1; flex-wrap: wrap; gap: 0 22px; padding-block: 0 8px; }
  .site-nav a { min-height: 40px; }
  .has-js .site-nav:not(.is-open) { display: none; }
  .home { padding-block: 31px 47px; }
  .home-hero { grid-template-columns: minmax(0, 1fr); gap: 23px; }
  .hero-copy h1 { margin-block: 14px 15px; font-size: clamp(52px, 13.2vw, 83px); }
  .hero-description { max-width: 390px; line-height: 1.5; }
  .hero-actions { margin-top: 19px; }
  .hero-visual img { aspect-ratio: 1.65; }
  .guide-facts { margin-top: 25px; padding-block: 12px; }
  .guide-facts > span { gap: 6px; padding-inline: 9px; font-size: 11px; }
  .guide-facts .icon { width: 16px; transform: scale(.8); }
  .paths-section { margin-top: 27px; }
  .section-heading { display: grid; align-items: start; gap: 10px; margin-bottom: 14px; }
  .path-grid { gap: 8px; }
  .path-card { padding: 12px 11px 9px; }
  .path-card h3 { font-size: 17px; }
  .path-card p { font-size: 13px; }
  .path-icon { width: 35px; height: 35px; }
  .first-run { grid-template-columns: minmax(0, 1fr); gap: 15px; margin-top: 28px; }
  .footer-inner { gap: 8px 20px; padding-block: 13px; }
  .footer-inner .brand { min-height: 35px; }
  .inner-page { padding-block: 17px 48px; }
  .breadcrumbs { margin-bottom: 22px; }
  .page-intro { margin-bottom: 22px; }
  .project-sequences { grid-template-columns: minmax(0, 1fr); }
  .library-paths, .lesson-list { grid-template-columns: minmax(0, 1fr); }
  .library-path { padding: 12px; gap: 9px; }
  .lesson-header h1 { font-size: clamp(46px, 11.8vw, 68px); }
  .glossary-group { grid-template-columns: 40px minmax(0, 1fr); }
  .glossary-group dl > div { grid-template-columns: minmax(0, 1fr); }
  .roadmap-current { display: grid; align-items: start; gap: 14px; padding: 17px; }
  .roadmap-updates article ul, .roadmap-planned ul { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 360px) {
  .guide-facts > span { padding-inline: 6px; }
  .definition-list div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .weight-calculator { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .weight-result { grid-column: 1 / -1; padding: 7px 0 0; border: 0; border-top: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0s !important; }
}