:root {
  color-scheme: dark;
  --bg: #07121e;
  --panel: #101f30;
  --line: #31475c;
  --ink: #f3f6fa;
  --muted: #b7cadc;
  --accent: #8ecaff;
  font:
    100%/1.65 system-ui,
    sans-serif;
  scroll-behavior: smooth;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}
a {
  color: var(--accent);
  text-underline-offset: 0.22em;
}
a:hover {
  text-decoration-thickness: 3px;
}
button,
input {
  font: inherit;
}
button,
a,
input {
  touch-action: manipulation;
}
button {
  cursor: pointer;
  padding: 0.65em 1em;
  border: 1px solid var(--accent);
  border-radius: 0.7rem;
  background: #17374e;
  color: var(--ink);
  min-height: 48px;
}
input {
  max-width: 100%;
  width: 100%;
  padding: 0.8em;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--bg);
  color: var(--ink);
}
:focus-visible {
  outline: 3px solid #ffdc86;
  outline-offset: 4px;
}
header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem clamp(1rem, 5vw, 5rem);
  border-bottom: 1px solid var(--line);
}
.brand {
  text-decoration: none;
  font-size: 0.75em;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.brand span {
  display: block;
  font-size: 1.35em;
  letter-spacing: 0.16em;
  color: var(--ink);
  font-weight: 850;
}
main {
  max-width: 1440px;
  margin: auto;
  padding: 0 clamp(1rem, 5vw, 5rem);
}
.hero {
  padding: 3rem 0;
  max-width: 55rem;
}
.eyebrow {
  color: var(--accent);
  font-size: 0.75em;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1 {
  font-size: clamp(2rem, 4.6vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin: 0.3em 0;
}
h2 {
  font-size: 1.75em;
  line-height: 1.2;
  margin: 0.25em 0 0.7em;
  overflow-wrap: anywhere;
}
h3 {
  line-height: 1.35;
  font-size: 1.15em;
}
.lead {
  font-size: 1.3em;
  color: var(--muted);
}
.caption,
figcaption {
  font-size: 0.85em;
  color: var(--muted);
}
.layout {
  display: grid;
  grid-template-columns: minmax(15rem, 19rem) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}
#contents {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 1.3rem;
  border-radius: 1rem;
  scroll-margin-top: 1rem;
}
#contents h2 {
  font-size: 1.3em;
}
#contents ol {
  padding-left: 1.6em;
}
#contents li {
  padding: 0.4em 0 0.4em 0.25em;
}
#contents a {
  display: inline-block;
  min-height: 36px;
}
#search-count {
  font-size: 0.85em;
  color: var(--muted);
}
label {
  display: block;
  margin-bottom: 0.5em;
}
article {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  scroll-margin-top: 1rem;
  overflow-wrap: break-word;
}
article:target h2 {
  color: #ffdc86;
}
.summary {
  font-size: 1.1em;
  color: var(--muted);
}
.steps {
  padding-left: 1.7em;
  counter-reset: steps;
}
.steps > li {
  padding-left: 0.5em;
  margin: 2rem 0;
}
.steps > li::marker {
  font-size: 1.15em;
  font-weight: 850;
  color: var(--accent);
}
figure {
  margin: 1.5rem 0;
  max-width: 430px;
}
img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 1rem;
}
figcaption {
  margin-top: 0.8em;
}
.notes {
  border-left: 3px solid var(--accent);
  background: var(--panel);
  padding: 1.2rem 1.4rem;
  border-radius: 0 0.7rem 0.7rem 0;
}
.notes h3 {
  margin-top: 0;
}
.notes ul {
  padding-left: 1.2em;
}
.notes li + li {
  margin-top: 1em;
}
dt {
  font-weight: 750;
  color: var(--accent);
  margin-top: 1.3em;
}
dd {
  margin: 0.3em 0 1em;
}
.related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8em 1.2em;
  margin-top: 1.5rem;
}
.related strong {
  flex-basis: 100%;
}
footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  color: var(--muted);
  margin-top: 2rem;
}
.skip {
  position: absolute;
  left: 1rem;
  top: -20rem;
  background: var(--bg);
  padding: 1rem;
  z-index: 5;
}
.skip:focus {
  top: 1rem;
}
html.large-text {
  font-size: 200%;
}
.large-text .layout {
  display: block;
}
.large-text .chapters {
  margin-top: 2rem;
}
.large-text h1 {
  font-size: 2em;
}
[hidden] {
  display: none !important;
}
@media (max-width: 850px) {
  .layout {
    display: block;
  }
  .hero {
    padding: 2rem 0;
  }
  article {
    padding-top: 2rem;
  }
  .chapters {
    margin-top: 2rem;
  }
  .steps {
    padding-left: 1.25em;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }
}
@media print {
  :root {
    color-scheme: light;
    color: #111;
    background: #fff;
    font-size: 12pt;
  }
  body {
    color: #111;
    background: #fff;
  }
  header,
  button,
  #search-box,
  .related {
    display: none;
  }
  a {
    color: #111;
  }
  .layout {
    display: block;
  }
  .notes,
  #contents {
    background: #fff;
    color: #111;
  }
  img {
    max-height: 17cm;
    object-fit: contain;
  }
  article {
    break-before: page;
  }
  .eyebrow,
  .summary,
  .caption,
  figcaption,
  footer,
  dt {
    color: #333;
  }
  figure {
    break-inside: avoid;
  }
}