:root {
  --fn-ink: #17150f;
  --fn-accent: #e8551f;
  --fn-paper: #fffdf8;
  --fn-hair: rgba(23, 21, 15, 0.14);
  --fn-muted: rgba(23, 21, 15, 0.62);
  --fn-font: "Space Grotesk", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --fn-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--fn-paper);
  color: var(--fn-ink);
  font-family: var(--fn-font);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.5;
}

a {
  color: var(--fn-ink);
}

a:focus-visible {
  outline: 3px solid var(--fn-accent);
  outline-offset: 3px;
}

code {
  font-family: var(--fn-mono);
  font-size: 0.86em;
  font-weight: 500;
}

.skip {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  z-index: 2;
  padding: 0.4rem 0.7rem;
  background: var(--fn-ink);
  color: var(--fn-paper);
  text-decoration: none;
  transform: translateY(-160%);
}

.skip:focus {
  transform: none;
}

.masthead {
  width: min(68rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.35rem 0 0;
}

.mast {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.mast-icon {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
}

.mast-wordmark {
  display: block;
  width: min(13.75rem, 58vw);
  height: auto;
}

.hero,
.stations,
.close,
.sources {
  width: min(44rem, calc(100% - 2.5rem));
  margin-left: auto;
  margin-right: auto;
}

.hero {
  padding: 2.4rem 0 0.4rem;
}

.kicker {
  margin: 0 0 0.7rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.standfirst {
  margin: 1.1rem 0 0;
}

.sub {
  margin: 0.85rem 0 0;
  color: var(--fn-muted);
  font-weight: 500;
}

.pull {
  margin: 1.35rem 0 0;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--fn-accent);
  font-weight: 500;
}

.factory {
  width: min(68rem, calc(100% - 2.5rem));
  margin: 2rem auto 0;
  padding: 0.25rem 0 0.5rem;
}

.conveyor {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

.node {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-height: 6.5rem;
  padding: 0.95rem 1rem 1rem;
  border: 1px solid var(--fn-hair);
  border-radius: 0.55rem;
  background: var(--fn-paper);
  color: inherit;
  text-decoration: none;
}

.node:hover,
.node:focus-visible {
  border-color: var(--fn-accent);
}

.node-num {
  color: var(--fn-accent);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.node-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.node-analogy {
  color: var(--fn-muted);
  font-size: 0.92rem;
}

.join {
  display: none;
}

.fail-loop {
  position: relative;
  margin: 0.1rem 0 0;
  padding: 0.15rem 0 0;
  text-align: center;
}

.fail-svg {
  display: none;
  width: 100%;
  height: 3.4rem;
}

.fail-path {
  stroke-dashoffset: 0;
  animation: crawl 1.4s linear infinite;
}

.fail-label {
  display: inline-block;
  margin-top: 0.15rem;
  padding: 0.15rem 0.4rem;
  color: var(--fn-muted);
  font-size: 0.86rem;
  font-weight: 500;
}

@keyframes crawl {
  to {
    stroke-dashoffset: -22;
  }
}

.stations {
  display: grid;
  gap: 1.15rem;
  padding: 2.1rem 0 0.4rem;
}

.card {
  display: grid;
  scroll-margin-top: 1.1rem;
  border: 1px solid var(--fn-hair);
  border-radius: 0.7rem;
  overflow: hidden;
}

.card:target,
.card.is-lit {
  border-color: var(--fn-accent);
}

.panel {
  display: grid;
  place-items: center;
  min-height: 9.5rem;
  background: var(--fn-ink);
}

.panel svg {
  width: 7.5rem;
  height: auto;
}

.howto {
  padding: 1.15rem 1.15rem 1.25rem;
}

.card-num {
  margin: 0;
  color: var(--fn-accent);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.card h2 {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.analogy {
  margin: 0.35rem 0 0;
  color: var(--fn-muted);
  font-weight: 500;
}

.skill {
  margin: 0.7rem 0 0;
}

.skill-note,
.plus {
  color: var(--fn-muted);
}

.howto p {
  margin: 0.7rem 0 0;
}

.howto blockquote {
  margin: 0.85rem 0 0;
  padding: 0 0 0 0.85rem;
  border-left: 3px solid var(--fn-accent);
  font-weight: 500;
}

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

.start {
  width: min(68rem, calc(100% - 2.5rem));
  margin: 2.1rem auto 0;
  padding: 1.4rem 1.25rem 1.5rem;
  border-radius: 0.7rem;
  background: var(--fn-ink);
  color: var(--fn-paper);
}

.start h2 {
  margin: 0 0 0.9rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.checks label {
  display: grid;
  grid-template-columns: 1.15rem 1fr;
  gap: 0.7rem;
  align-items: start;
  cursor: pointer;
}

.checks input {
  appearance: none;
  width: 1.1rem;
  height: 1.1rem;
  margin: 0.18rem 0 0;
  border: 1.5px solid rgba(255, 253, 248, 0.35);
  border-radius: 0.2rem;
  background: transparent;
}

.checks input:checked {
  border-color: var(--fn-accent);
  background: var(--fn-accent);
  box-shadow: inset 0 0 0 2px var(--fn-ink);
}

.checks input:focus-visible {
  outline: 3px solid var(--fn-accent);
  outline-offset: 2px;
}

.start code {
  color: var(--fn-paper);
}

.close {
  padding: 2.4rem 0 0.4rem;
}

.close p {
  margin: 0;
}

.close blockquote {
  margin: 1rem 0 0;
  padding: 0 0 0 1rem;
  border-left: 3px solid var(--fn-accent);
  font-weight: 500;
}

.cta {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.7rem 1.05rem;
  border-radius: 0.4rem;
  background: var(--fn-accent);
  color: var(--fn-paper);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.sources {
  padding: 2rem 0 0.2rem;
  border-top: 1px solid var(--fn-hair);
  margin-top: 2.2rem;
}

.sources h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.attr {
  margin: 0.55rem 0 0;
  color: var(--fn-muted);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.15rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.links a {
  font-weight: 500;
  text-underline-offset: 0.18em;
}

.links a:hover {
  color: var(--fn-accent);
}

.foot {
  width: min(44rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.4rem 0 2.6rem;
}

.foot a {
  color: var(--fn-muted);
  text-decoration: none;
}

.foot a:hover {
  color: var(--fn-accent);
}

@media (min-width: 48rem) {
  .conveyor {
    grid-template-columns: 1fr 1.4rem 1fr 1.4rem 1fr 1.4rem 1fr;
    grid-template-rows: auto auto;
    gap: 0 0;
    align-items: stretch;
  }

  .node {
    min-height: 8.1rem;
  }

  .join {
    display: block;
    align-self: center;
    height: 1.5px;
    background: var(--fn-hair);
    position: relative;
  }

  .join::after {
    content: "";
    position: absolute;
    right: -2px;
    top: 50%;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 7px solid var(--fn-ink);
    opacity: 0.45;
    transform: translateY(-50%);
  }

  .fail-loop {
    grid-column: 3 / -1;
    margin-top: 0.15rem;
  }

  .fail-svg {
    display: block;
  }

  .card {
    grid-template-columns: 13.5rem 1fr;
  }

  .panel {
    min-height: 100%;
  }

  .start {
    padding: 1.6rem 1.6rem 1.7rem;
  }

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

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

  .fail-path {
    animation: none;
  }
}