:root {
  --ink: #10202a;
  --muted: #5c6c72;
  --paper: #fffdf7;
  --white: #ffffff;
  --soft: #eef6f2;
  --mist: #dceeee;
  --deep: #06242d;
  --bay: #0d5968;
  --teal: #008b91;
  --eucalypt: #4e856d;
  --sand: #c48821;
  --silica: #f4d78d;
  --ochre: #805a08;
  --coral: #d66a50;
  --line: rgba(16, 32, 42, .16);
  --shadow: 0 24px 60px rgba(6, 36, 45, .16);
  --radius: 8px;
  --max: 1180px;
  --heading: "Nunito Sans", "Avenir Next", Arial, sans-serif;
  --body: "Atkinson Hyperlegible", "Segoe UI", Arial, sans-serif;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 18px;
  line-height: 1.62;
  margin: 0;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  background: var(--sand);
  border-radius: var(--radius);
  color: var(--deep);
  left: 1rem;
  padding: .7rem 1rem;
  position: absolute;
  text-decoration: none;
  top: -5rem;
  z-index: 60;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  background: rgba(255, 253, 247, .93);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.nav {
  align-items: center;
  display: flex;
  gap: .7rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  min-height: 76px;
  padding: 0 .9rem;
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: .8rem;
  min-width: 205px;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--deep), var(--bay));
  border-radius: 50%;
  box-shadow: 0 12px 28px rgba(6, 36, 45, .22);
  color: var(--silica);
  display: inline-flex;
  font-family: var(--heading);
  font-size: .75rem;
  font-weight: 900;
  height: 44px;
  justify-content: center;
  letter-spacing: 0;
  width: 44px;
}

.brand-text {
  display: grid;
  gap: .02rem;
}

.brand-text strong,
h1,
h2,
h3,
.nav-link,
.nav-group summary,
.button,
.section-label,
.mini-label,
.builder-index a strong,
.sequence-nav strong {
  font-family: var(--heading);
  letter-spacing: 0;
}

.brand-text strong {
  color: var(--deep);
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
}

.brand-text span {
  color: var(--muted);
  font-size: .78rem;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: nowrap;
  gap: .28rem;
  justify-content: flex-end;
}

.nav-link,
.nav-group summary {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  font-size: .62rem;
  font-weight: 900;
  min-height: 40px;
  padding: .46rem .38rem;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-link:hover,
.nav-link:focus,
.nav-link[aria-current="page"],
.nav-group summary:hover,
.nav-group summary:focus,
.nav-group.is-current summary,
.nav-group[open] summary {
  background: var(--soft);
  border-color: var(--line);
  color: var(--bay);
}

.nav-group {
  position: relative;
}

.nav-group summary {
  list-style: none;
}

.nav-group summary::-webkit-details-marker {
  display: none;
}

.nav-group summary::after {
  border: solid currentColor;
  border-width: 0 2px 2px 0;
  content: "";
  height: .34rem;
  margin-left: .45rem;
  transform: translateY(-.12rem) rotate(45deg);
  width: .34rem;
}

.nav-menu {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: grid;
  gap: .12rem;
  min-width: 240px;
  padding: .45rem;
  position: absolute;
  right: 0;
  top: calc(100% + .55rem);
  z-index: 45;
}

.nav-menu .nav-link {
  justify-content: flex-start;
  padding: .66rem .75rem;
  white-space: nowrap;
}

.nav-toggle {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  display: none;
  font-family: var(--heading);
  font-size: .8rem;
  font-weight: 900;
  min-height: 42px;
  padding: .6rem .8rem;
  text-transform: uppercase;
}

.hero {
  align-items: center;
  background-image: linear-gradient(90deg, rgba(6, 36, 45, .96) 0%, rgba(6, 36, 45, .78) 37%, rgba(6, 36, 45, .30) 62%, rgba(6, 36, 45, 0) 100%), var(--page-hero-image);
  background-position: center;
  background-size: cover;
  border-bottom: 1px solid var(--line);
  color: var(--white);
  display: flex;
  min-height: min(680px, calc(100vh - 154px));
  padding: clamp(2.7rem, 4.8vw, 4.5rem) 1.25rem;
  position: relative;
}

.hero-body {
  margin: 0 auto;
  max-width: var(--max);
  width: 100%;
}

.hero-copy {
  max-width: 730px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(3rem, 6.2vw, 6.8rem);
  font-weight: 900;
  line-height: .9;
  max-width: 12ch;
  overflow-wrap: normal;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.45rem);
  font-weight: 900;
  line-height: 1.02;
}

h3 {
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1.14;
}

.hero-lede,
.lede {
  font-size: clamp(1.08rem, 1.8vw, 1.35rem);
  line-height: 1.5;
}

.hero-lede {
  color: rgba(255, 255, 255, .94);
  margin-top: 1.25rem;
  max-width: 690px;
}

.micro-note {
  color: rgba(255, 255, 255, .78);
  font-size: .95rem;
  margin-top: 1rem;
}

.button-row,
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.7rem;
}

.button {
  align-items: center;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  cursor: pointer;
  display: inline-flex;
  font-size: .8rem;
  font-weight: 900;
  justify-content: center;
  min-height: 48px;
  padding: .78rem 1rem;
  text-decoration: none;
  text-transform: uppercase;
}

.button.primary {
  background: linear-gradient(135deg, #dba43a, var(--silica));
  border-color: #ffe5a1;
  color: #142321;
}

.button.secondary {
  background: rgba(255, 255, 255, .08);
  color: var(--white);
}

.button.ghost {
  background: var(--white);
  color: var(--bay);
}

.section,
.page-hero {
  padding: clamp(3.5rem, 8vw, 6rem) 1.25rem;
}

.hero + .section {
  padding-top: clamp(1.4rem, 3.2vw, 2.4rem);
}

.page-hero {
  background-image: linear-gradient(90deg, rgba(6, 36, 45, .96), rgba(6, 36, 45, .72) 42%, rgba(6, 36, 45, .22) 68%, rgba(6, 36, 45, 0)), var(--page-hero-image);
  background-position: center;
  background-size: cover;
  color: var(--white);
  min-height: min(560px, 62vh);
  display: flex;
  align-items: center;
}

.section-inner,
.page-hero-inner {
  margin: 0 auto;
  max-width: var(--max);
}

.page-hero-inner {
  text-align: left;
  width: 100%;
}

.page-hero h1 {
  font-size: clamp(2.8rem, 6.5vw, 6rem);
  max-width: 11ch;
}

.page-hero .lede {
  color: rgba(255, 255, 255, .9);
  margin-top: 1.2rem;
  max-width: 790px;
}

.section-heading {
  display: grid;
  gap: .75rem;
  margin-bottom: 1.5rem;
  max-width: 860px;
}

.section-heading.centred {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-label,
.mini-label {
  color: var(--bay);
  font-size: .78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.hero-label {
  color: var(--silica);
  margin-bottom: 1rem;
}

.muted {
  color: var(--muted);
}

.soft-band {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.deep-band {
  background: var(--deep);
  color: var(--white);
}

.deep-band .section-heading .section-label {
  color: var(--silica);
}

.deep-band .card .mini-label,
.deep-band .repo-card .mini-label {
  color: var(--ochre);
}

.deep-band .muted,
.deep-band .lede {
  color: rgba(255, 255, 255, .78);
}

.card-grid,
.trail-grid,
.repo-grid,
.builder-index,
.source-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.trail-card,
.repo-card,
.question-card,
.source-card,
.builder-index a,
.builder-panel,
.quote-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(6, 36, 45, .07);
}

.card,
.trail-card,
.repo-card,
.question-card,
.source-card,
.builder-index a {
  color: var(--ink);
  display: grid;
  gap: .75rem;
  padding: 1.25rem;
  text-decoration: none;
}

.trail-card {
  border-left: 6px solid var(--teal);
}

.trail-card:nth-child(2n) {
  border-left-color: var(--eucalypt);
}

.trail-card:nth-child(3n) {
  border-left-color: var(--sand);
}

.card p,
.trail-card p,
.repo-card p,
.question-card p,
.source-card p,
.builder-index p {
  color: var(--muted);
}

.card .mini-label,
.trail-card .mini-label,
.repo-card .mini-label,
.question-card .mini-label,
.source-card .mini-label,
.builder-index .mini-label {
  color: var(--ochre);
}

.text-link {
  color: var(--bay);
  font-family: var(--heading);
  font-size: .85rem;
  font-weight: 900;
  text-transform: uppercase;
}

.split {
  align-items: center;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  grid-template-columns: minmax(0, 1fr) minmax(300px, .8fr);
}

.visual-panel {
  background: linear-gradient(135deg, var(--mist), var(--paper));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.visual-panel img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
}

.quote-panel {
  background: linear-gradient(135deg, #fff, var(--soft));
  color: var(--deep);
  font-size: clamp(1.12rem, 2vw, 1.55rem);
  font-weight: 700;
  line-height: 1.42;
  padding: 1.4rem;
}

.question-list {
  display: grid;
  gap: .85rem;
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.question-list li {
  background: rgba(255, 255, 255, .74);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .95rem 1rem;
}

.pathway {
  counter-reset: path;
  display: grid;
  gap: .85rem;
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.pathway li {
  align-items: start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  gap: .75rem;
  grid-template-columns: auto 1fr;
  padding: 1rem;
}

.pathway li::before {
  background: var(--deep);
  border-radius: 50%;
  color: var(--silica);
  content: counter(path, decimal-leading-zero);
  counter-increment: path;
  display: grid;
  font-family: var(--heading);
  font-size: .72rem;
  font-weight: 900;
  height: 2rem;
  place-items: center;
  width: 2rem;
}

.callout {
  background: linear-gradient(135deg, var(--deep), #0d5968);
  border-radius: var(--radius);
  color: var(--white);
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr auto;
  margin-top: 2rem;
  padding: 1.4rem;
}

.callout p {
  color: rgba(255, 255, 255, .82);
}

.sequence-nav {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 auto;
  max-width: var(--max);
  padding: 0 1.25rem clamp(3rem, 7vw, 5rem);
}

.sequence-nav a {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  gap: .25rem;
  min-height: 96px;
  padding: 1.1rem;
  text-decoration: none;
}

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

.sequence-nav span {
  color: var(--muted);
  font-size: .8rem;
}

.sequence-nav strong {
  color: var(--bay);
  font-size: 1.18rem;
}

.site-footer {
  background: var(--deep);
  color: var(--white);
  padding: 2.5rem 1.25rem;
}

.site-footer-inner {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1fr) auto;
  margin: 0 auto;
  max-width: var(--max);
}

.site-footer p {
  color: rgba(255, 255, 255, .75);
  margin-top: .35rem;
  max-width: 640px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  justify-content: flex-end;
  max-width: 520px;
}

.footer-links a {
  color: var(--silica);
  font-family: var(--heading);
  font-size: .86rem;
  font-weight: 900;
}

.back-to-top {
  align-items: center;
  background: var(--deep);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 50%;
  bottom: 1rem;
  box-shadow: var(--shadow);
  color: var(--white);
  cursor: pointer;
  display: flex;
  font-family: var(--heading);
  font-size: 1.1rem;
  font-weight: 900;
  height: 48px;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  right: 1rem;
  transform: translateY(12px);
  transition: opacity .2s ease, transform .2s ease;
  width: 48px;
  z-index: 50;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.builder-layout {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, .95fr) minmax(320px, 1.05fr);
}

.builder-panel {
  padding: 1.25rem;
}

.builder-form {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: .45rem;
}

.field label {
  font-family: var(--heading);
  font-weight: 900;
}

.field span {
  color: var(--muted);
  font-size: .92rem;
}

input,
textarea,
select {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font: inherit;
  min-height: 46px;
  padding: .7rem .8rem;
  width: 100%;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.markdown-output {
  font-family: Consolas, "Courier New", monospace;
  min-height: 560px;
  overflow-wrap: break-word;
  white-space: pre-wrap;
}

.status-line {
  color: var(--muted);
  font-size: .92rem;
}

.source-card code {
  color: var(--bay);
  font-size: .88rem;
  overflow-wrap: anywhere;
}

@media (max-width: 940px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    align-items: stretch;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: none;
    gap: .35rem;
    grid-template-columns: 1fr;
    inset: 76px 0 auto 0;
    justify-content: stretch;
    max-height: calc(100vh - 76px);
    overflow: auto;
    padding: 1rem;
    position: fixed;
  }

  body.nav-open .nav-links {
    display: grid;
  }

  .nav-link,
  .nav-group summary {
    justify-content: space-between;
    padding: .85rem;
    width: 100%;
  }

  .nav-group {
    width: 100%;
  }

  .nav-menu {
    background: transparent;
    border: 0;
    border-left: 3px solid var(--mist);
    border-radius: 0;
    box-shadow: none;
    margin: .15rem 0 .45rem .75rem;
    min-width: 0;
    padding: .2rem 0 .2rem .55rem;
    position: static;
  }

  .nav-menu .nav-link {
    white-space: normal;
  }

  .card-grid,
  .trail-grid,
  .repo-grid,
  .builder-index,
  .source-grid,
  .split,
  .builder-layout,
  .site-footer-inner {
    grid-template-columns: 1fr;
  }

  .site-footer-inner,
  .footer-links {
    justify-content: start;
  }

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

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand-text span {
    display: none;
  }

  .hero {
    min-height: 78vh;
    padding-top: 4.5rem;
  }

  h1 {
    font-size: clamp(2.1rem, 10vw, 2.5rem);
    max-width: 100%;
    overflow-wrap: normal;
  }

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

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

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}