@font-face {
  font-family: "Besley";
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url("fonts/besley-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/atkinson-hyperlegible-normal-400.woff2") format("woff2");
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/atkinson-hyperlegible-normal-700.woff2") format("woff2");
}

@font-face {
  font-family: "Azeret Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/azeret-mono-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Azeret Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/azeret-mono-latin.woff2") format("woff2");
}

:root {
  --zinc: #b7c4c1;
  --cut: #f4f7f6;
  --ink: #1c2422;
  --silt: #3e4f4c;
  --greenstone: #234640;
  --malachite: #1f6f66;
  --malachite-ink: #14564f;
  --hematite: #8e3f36;
  --publish: color-mix(in srgb, var(--ink) 68%, var(--malachite));
  --checkpoint: color-mix(in srgb, var(--greenstone) 80%, var(--zinc));
  --display: "Besley", "Iowan Old Style", Palatino, "Palatino Linotype", serif;
  --body: "Atkinson Hyperlegible", "Avenir Next", "Segoe UI", sans-serif;
  --mono: "Azeret Mono", "Source Code Pro", ui-monospace, monospace;
  --measure: 68ch;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--zinc);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-weight: 400;
}

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

img {
  max-width: 100%;
}

p,
h1,
h2,
h3 {
  overflow-wrap: break-word;
}

a {
  color: var(--malachite-ink);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

code,
.kicker,
.layer-hint,
.term-label,
.cmd pre,
.mast nav a,
.foot-links {
  font-family: var(--mono);
  font-variation-settings: "wght" 480;
}

code {
  font-size: 0.92em;
  font-weight: 500;
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--malachite-ink);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: 0;
  transform: translateY(-120%);
  background: var(--cut);
  color: var(--ink);
  padding: 0.55rem 0.8rem;
  z-index: 5;
}

.skip:focus {
  transform: none;
}

.wrap {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.mast {
  background: var(--ink);
  color: var(--cut);
}

.mast-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem 1.5rem;
  flex-wrap: wrap;
  min-height: 4.25rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
}

.brand svg {
  display: block;
  width: 0.7rem;
  height: 1.45rem;
}

.mast nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.mast nav a {
  color: inherit;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.mast nav a:hover {
  color: #d5ece8;
}

.mast :focus-visible,
.foot :focus-visible,
.stratum-origin :focus-visible,
.stratum-publish :focus-visible,
.stratum-checkpoint :focus-visible,
.stratum-base :focus-visible,
.cmd button:focus-visible {
  outline-color: var(--cut);
}

.hero {
  padding: 1.25rem 0 0.25rem;
}

.barrel {
  background: var(--ink);
  padding: 0.55rem;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.stratum {
  color: var(--cut);
}

.stratum summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
  padding: 0.75rem 1rem;
}

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

.layer-id,
.layer-label {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1.1rem;
  min-width: 0;
}

.layer-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.layer-hint {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 400;
  opacity: 0.86;
}

.stratum-mark {
  font-family: var(--mono);
  font-size: 1.15rem;
  line-height: 1;
  flex: none;
}

.stratum-mark::before {
  content: "+";
}

.stratum[open] .stratum-mark::before {
  content: "\2013";
}

.stratum-origin {
  background: color-mix(in srgb, var(--ink) 78%, var(--zinc));
}

.stratum-publish {
  background: var(--publish);
}

.stratum-checkpoint {
  background: var(--checkpoint);
}

.stratum-base {
  background: var(--greenstone);
}

.stratum-body {
  padding: 0 1rem 1rem;
  max-width: 70ch;
}

.stratum-body p {
  margin: 0;
}

.stratum-session {
  background: var(--cut);
  color: var(--ink);
  box-shadow: inset 8px 0 0 var(--malachite);
  padding: clamp(1.25rem, 2.5vw, 2.15rem) clamp(1.1rem, 2.5vw, 1.8rem) clamp(1.2rem, 2.4vw, 1.7rem);
}

.stratum-session .layer-label {
  margin-bottom: 1.15rem;
}

.stratum-session .layer-hint {
  color: var(--silt);
  opacity: 1;
}

.session-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(17rem, 0.75fr);
  grid-template-areas:
    "kicker install"
    "title install"
    "lede install";
  column-gap: 2rem;
  row-gap: 0.85rem;
  align-items: start;
}

.session-grid .kicker {
  grid-area: kicker;
  margin: 0;
}

.session-grid h1 {
  grid-area: title;
}

.session-grid .lede {
  grid-area: lede;
  margin: 0;
}

.install-col {
  grid-area: install;
}

.install-col .cmd {
  margin-top: 0;
  grid-template-columns: minmax(0, 1fr);
}

.install-col .cmd pre {
  font-size: 0.75rem;
  padding-inline: 0.75rem;
}

.install-col .cmd button {
  min-height: 2.6rem;
}

.kicker {
  margin: 0 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--silt);
}

h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 560;
  font-size: clamp(2.35rem, 5.2vw, 4.05rem);
  letter-spacing: -0.035em;
  line-height: 0.98;
  text-wrap: balance;
  max-width: 12em;
}

.lede {
  margin: 1rem 0 0;
  max-width: var(--measure);
  font-size: 1.05rem;
}

.fine {
  margin: 0.7rem 0 0;
  color: var(--silt);
  font-size: 0.92rem;
  max-width: 42ch;
}

.fine + .fine {
  margin-top: 0.35rem;
}

.cmd {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  background: var(--ink);
  color: var(--cut);
  margin-top: 0.85rem;
}

.cmd pre {
  margin: 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.6;
  white-space: pre;
}

.cmd button {
  margin: 0;
  border: 0;
  background: var(--malachite);
  color: var(--cut);
  font-family: var(--body);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0 1rem;
  min-width: 5.6rem;
  cursor: pointer;
}

.cmd button:hover {
  background: var(--malachite-ink);
}

.section {
  padding-top: 4.25rem;
}

h2 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  text-wrap: balance;
  max-width: 18ch;
}

h3 {
  margin: 0 0 0.4rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.prose p,
.split p,
.steps p,
.faq-item p {
  max-width: var(--measure);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 1.15rem 0 1.25rem;
}

.split article {
  background: var(--cut);
  padding: 1rem 1.05rem 0.85rem;
  margin: 0;
}

.split h3 {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0;
}

.notice {
  border-left: 6px solid var(--hematite);
  background: var(--cut);
  padding: 0.85rem 1rem 0.15rem;
  margin: 1.15rem 0;
}

.steps {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  counter-reset: step;
}

.steps > li {
  counter-increment: step;
  margin: 0 0 2rem;
}

.steps h3::before {
  content: counter(step) ". ";
  color: var(--malachite-ink);
}

.terminal {
  margin-top: 0.4rem;
}

.terminal .cmd {
  margin-top: 0.45rem;
}

.term-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--silt);
}

.gate {
  background: var(--cut);
  border-left: 6px solid var(--hematite);
  padding: 1.15rem 1.2rem 0.35rem;
}

.aside-block {
  margin-top: 0.5rem;
}

.faq {
  margin-top: 0.4rem;
}

.faq-item {
  padding: 1.05rem 0 1.1rem;
  border-top: 1px solid color-mix(in srgb, var(--ink) 22%, var(--zinc));
}

.faq-item p {
  margin: 0;
}

main {
  padding-bottom: 4.5rem;
}

.foot {
  background: var(--ink);
  color: var(--cut);
  padding: 2rem 0 2.4rem;
}

.foot-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
}

.foot p {
  margin: 0.3rem 0;
  max-width: 46ch;
}

.foot a {
  color: var(--cut);
}

.foot-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.foot-meta {
  color: color-mix(in srgb, var(--cut) 72%, var(--zinc));
  font-size: 0.92rem;
}

.stratum {
  interpolate-size: allow-keywords;
}

.stratum::details-content {
  overflow: hidden;
  height: 0;
  opacity: 0;
  transition: height 240ms ease, opacity 240ms ease;
}

.stratum[open]::details-content {
  height: auto;
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .barrel {
    animation: core-open 900ms cubic-bezier(0.16, 0.84, 0.24, 1);
  }
}

@keyframes core-open {
  from {
    clip-path: inset(42% 0 42% 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stratum::details-content,
  .stratum[open]::details-content {
    transition: none;
  }
}

@media (max-width: 800px) {
  .session-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "kicker"
      "title"
      "install"
      "lede";
  }

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

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

  .cmd button {
    min-height: 2.75rem;
  }

  h1 {
    font-size: clamp(2.15rem, 10vw, 3.1rem);
  }
}