:root {
  --ink: #172c40;
  --muted: #536578;
  --paper: #f7f5ef;
  --white: #fffefa;
  --line: #d7ddd9;
  --accent: #c24c2d;
  --teal: #087e83;
  --night: #102538;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font:
    16px/1.7 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans",
    sans-serif;
}
a {
  color: var(--teal);
  text-underline-offset: 4px;
}
a:hover {
  color: var(--accent);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #d88434;
  outline-offset: 4px;
}
header {
  background: var(--night);
  color: white;
  border-bottom: 4px solid var(--accent);
}
.top {
  max-width: 1260px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 28px;
  flex-wrap: wrap;
}
.brand {
  color: white;
  text-decoration: none;
  font-size: 17px;
  font-weight: 760;
  letter-spacing: 0.02em;
}
.brand small {
  font:
    11px ui-monospace,
    monospace;
  display: block;
  color: #a7c3d0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
nav {
  display: flex;
  gap: 21px;
  flex-wrap: wrap;
  font-size: 14px;
}
nav a {
  color: #d7e9ed;
  text-decoration: none;
}
nav a[aria-current="page"] {
  color: #ffbd8d;
  text-decoration: underline;
}
.skip {
  position: absolute;
  left: -1000px;
}
.skip:focus {
  left: 20px;
  top: 10px;
  background: white;
  padding: 10px;
  z-index: 99;
}
.wrap {
  max-width: 1260px;
  margin: auto;
  padding: 40px 28px 72px;
}
.eyebrow {
  font:
    12px/1.5 ui-monospace,
    monospace;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-weight: 700;
}
.hero {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 50px;
  padding: 26px 0 42px;
  border-bottom: 1px solid var(--line);
}
h1,
h2,
h3 {
  line-height: 1.2;
}
h1 {
  overflow-wrap: anywhere;
  font:
    clamp(35px, 4.5vw, 62px) / 1.06 Georgia,
    "Times New Roman",
    serif;
  letter-spacing: -0.035em;
  margin: 18px 0 24px;
  max-width: 850px;
}
h2 {
  font:
    31px/1.2 Georgia,
    serif;
  margin: 48px 0 20px;
}
h3 {
  font-size: 19px;
}
.lede {
  font-size: 19px;
  color: var(--muted);
  max-width: 780px;
}
.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 26px 0;
}
.button,
button {
  display: inline-block;
  background: var(--teal);
  color: white;
  border: 1px solid var(--teal);
  border-radius: 4px;
  padding: 10px 18px;
  text-decoration: none;
  font: 600 14px/1.5 inherit;
  cursor: pointer;
}
.button.secondary {
  background: transparent;
  color: var(--ink);
  border-color: #9ba8b0;
}
button:hover,
.button:hover {
  background: #07595e;
  color: white;
}
.architecture {
  background: var(--night);
  color: #e9f1ef;
  padding: 26px;
  border-radius: 6px;
  align-self: center;
}
.architecture h3 {
  color: #f5bd92;
  margin: 0 0 18px;
  font:
    12px ui-monospace,
    monospace;
  letter-spacing: 0.13em;
}
.route {
  border-left: 2px solid #4d8b95;
  padding-left: 20px;
  margin: 20px 0;
}
.route strong {
  display: block;
}
.route small {
  color: #a8c6cd;
}
.layer {
  display: inline-block;
  border: 1px solid #57727c;
  padding: 7px 10px;
  margin: 4px 4px 4px 0;
  font:
    13px ui-monospace,
    monospace;
}
.architecture p {
  font-size: 13px;
  color: #bdd3d8;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 24px;
}
.card h3 {
  margin: 12px 0;
}
.card a {
  text-decoration: none;
  color: var(--ink);
}
.card a:hover {
  color: var(--accent);
}
.card p {
  font-size: 15px;
  color: var(--muted);
}
.badge {
  display: inline-block;
  font:
    11px/1.4 ui-monospace,
    monospace;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--teal);
  background: #e6f1ed;
  padding: 5px 7px;
  border-radius: 2px;
}
.badge.read {
  background: #f2eade;
  color: #87502c;
}
.note {
  background: #eaf0ee;
  border-left: 3px solid var(--teal);
  padding: 18px 22px;
  font-size: 14px;
  margin: 26px 0;
}
.note.warning {
  background: #f4ebdf;
  border-color: var(--accent);
}
.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 30px 0;
}
.stat {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}
.stat strong {
  display: block;
  font:
    36px Georgia,
    serif;
}
.stat span {
  font-size: 13px;
  color: var(--muted);
}
.chapter-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 46px;
}
.sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
  font-size: 14px;
}
.sidebar a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid var(--line);
  padding: 9px 13px;
}
.sidebar a[aria-current="page"] {
  border-color: var(--accent);
  color: var(--ink);
  background: #eee9df;
}
.prose {
  max-width: 850px;
}
.prose h1 {
  font-size: 43px;
}
.prose h2 {
  font:
    27px Georgia,
    serif;
}
.prose p,
.prose li {
  max-width: 78ch;
}
.prose pre,
pre {
  background: #132c3d;
  color: #deedee;
  padding: 20px;
  border-radius: 4px;
  overflow: auto;
  font:
    13px/1.7 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  white-space: pre;
  max-width: 100%;
}
code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.87em;
  overflow-wrap: anywhere;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  text-align: left;
}
th {
  font-weight: 650;
  border-bottom: 2px solid #a4b3ba;
}
th,
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.table-wrap {
  overflow: auto;
  max-width: 100%;
}
.table-wrap table {
  min-width: 650px;
}
.prose table {
  display: block;
  overflow: auto;
}
.prose blockquote {
  border-left: 3px solid #8ea5ad;
  margin-left: 0;
  padding-left: 20px;
  color: var(--muted);
}
details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 15px 18px;
  margin: 14px 0;
}
summary {
  cursor: pointer;
  font-weight: 650;
}
footer {
  border-top: 1px solid var(--line);
  max-width: 1204px;
  margin: auto;
  padding: 25px 0 40px;
  color: var(--muted);
  font-size: 12px;
}
.controls {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: end;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 22px;
  border-radius: 4px;
}
.controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
}
.controls input,
.controls select {
  padding: 9px;
  border: 1px solid #9caeb5;
  border-radius: 3px;
  font: 15px inherit;
  color: var(--ink);
  background: white;
  max-width: 100%;
}
.controls input[type="file"] {
  max-width: 300px;
}
.groups {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(65px, 1fr));
  gap: 7px;
  margin: 22px 0;
}
.group {
  border: 1px solid #84b8b5;
  background: #dceee8;
  padding: 9px 5px;
  border-radius: 3px;
  text-align: center;
  font:
    12px ui-monospace,
    monospace;
}
.group.pruned {
  background: #edece6;
  border-color: #c3c7bf;
  color: #63736e;
}
.group span {
  display: block;
  font-size: 10px;
  margin-top: 4px;
}
.status {
  font-weight: 650;
  color: var(--teal);
  margin: 20px 0;
  overflow-wrap: anywhere;
}
.status.error {
  color: #a02f1c;
}
.tabs {
  display: flex;
  gap: 10px;
  margin: 20px 0;
  flex-wrap: wrap;
}
.tabs button[aria-pressed="false"] {
  background: transparent;
  color: var(--ink);
}
.barrow {
  display: grid;
  grid-template-columns: 200px 1fr 110px;
  gap: 14px;
  align-items: center;
  margin: 12px 0;
  font:
    13px ui-monospace,
    monospace;
}
.bar {
  height: 17px;
  background: #e0e5e0;
}
.bar i {
  display: block;
  height: 100%;
  background: var(--teal);
}
.pager {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 25px;
  margin-top: 45px;
}
.source {
  font-size: 13px;
  margin-top: 14px;
}
.muted {
  color: var(--muted);
}
[hidden] {
  display: none !important;
}
@media (max-width: 900px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero {
    gap: 25px;
  }
  .chapter-layout {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 25px;
  }
}
@media (max-width: 650px) {
  .top {
    padding: 15px 20px;
    gap: 14px;
  }
  nav {
    gap: 14px;
    font-size: 12px;
  }
  .wrap {
    padding: 25px 20px 50px;
  }
  .hero,
  .grid2,
  .chapter-layout {
    display: block;
  }
  .architecture {
    margin-top: 30px;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    margin-bottom: 30px;
    display: flex;
    overflow: auto;
    gap: 8px;
  }
  .sidebar a {
    flex: 0 0 135px;
    border-left: 0;
    border-bottom: 2px solid var(--line);
    padding: 8px;
  }
  .stats {
    gap: 12px;
  }
  .stat strong {
    font-size: 28px;
  }
  .prose h1 {
    font-size: 34px;
  }
  .controls {
    display: block;
  }
  .controls > * {
    margin: 12px 0;
  }
  .controls label {
    max-width: 100%;
  }
  .barrow {
    grid-template-columns: 1fr 75px;
  }
  .barrow .bar {
    grid-column: 1/-1;
    grid-row: 2;
  }
  .barrow {
    margin: 20px 0;
  }
  footer {
    padding: 24px 20px;
  }
  .prose pre {
    padding: 14px;
    font-size: 12px;
  }
  .table-wrap table {
    min-width: 570px;
  }
}