@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-Light.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-LightItalic.woff2") format("woff2");
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/JetBrainsMono-BoldItalic.woff2") format("woff2");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

:root {
  --font-size: clamp(10px, 1.25vw, 16px);
  --font-size-small: 80%;
  --font-size-medium: 125%;
  --manual-font-size: clamp(13px, 1.25vw, 16px);
  --line-height: 1.4;
  font-family: "JetBrains Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--body-background);
  color: var(--text);
  font-size: var(--font-size);
  font-weight: 300;
  line-height: var(--line-height);
}

a {
  color: var(--accent);
  font-weight: 700;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--text-strong);
}

b,
strong {
  font-weight: 700;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 20;
  padding: 0.5rem 0.75rem;
  transform: translateY(-200%);
  border-radius: 0.3rem;
  background: var(--accent);
  color: var(--background);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  padding: 0.85rem max(1.25rem, calc((100vw - 76rem) / 2));
  background: var(--header-background);
  backdrop-filter: blur(14px);
}

.site-title {
  color: var(--text-strong);
  font-size: var(--font-size-medium);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-title::before {
  margin-right: 0.65rem;
  color: var(--marker);
  content: "//";
}

.manual-search {
  position: relative;
  width: 100%;
}

.manual-search.search-pending {
  visibility: hidden;
}

.manual-search label,
.search-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.search-field {
  display: flex;
  align-items: center;
  position: relative;
}

.manual-sidebar .search-field {
  font-size: 77.5%;
}

.manual-search input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  padding: 0.3rem 1.5rem 0.5rem 0;
  background: transparent;
  color: var(--text-strong);
  font: inherit;
}

.manual-search input::placeholder {
  color: var(--text-muted);
}

.manual-search input::-webkit-search-cancel-button {
  display: none;
}

.manual-search input:focus-visible {
  border-bottom-color: var(--accent);
  outline: none;
  box-shadow: 0 2px 0 var(--accent);
}

.search-shortcut {
  position: absolute;
  right: 0;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  pointer-events: none;
}

.manual-search input:focus + .search-shortcut,
.manual-search input:not(:placeholder-shown) + .search-shortcut {
  opacity: 0;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.45rem);
  left: 0;
  width: min(32rem, calc(100vw - 2.5rem));
  max-height: 70vh;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 0.45rem;
  background: var(--surface-raised);
  box-shadow: var(--search-shadow);
  z-index: 20;
}

.search-results ul {
  margin: 0;
  padding: 0.4rem;
  list-style: none;
}

.search-results a {
  display: block;
  border-radius: 0.3rem;
  padding: 0.65rem 0.75rem;
  font-weight: 300;
  text-decoration: none;
}

.search-results a:hover,
.search-results a.active {
  background: var(--accent-soft);
}

.search-results .search-result-heading {
  display: flex;
  align-items: baseline;
  gap: 1.5ch;
  justify-content: space-between;
}

.search-result-title {
  color: var(--text-strong);
  font-weight: 700;
}

.search-result-context {
  flex: none;
  color: var(--marker);
}

.search-result-preview {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 0.2rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

.search-result-preview,
.search-empty {
  color: var(--text-muted);
}

.search-result-context,
.search-result-preview,
.search-empty {
  font-size: var(--font-size-small);
}

.search-result mark {
  background: none;
  color: var(--accent);
  font-weight: 700;
}

.search-empty {
  margin: 0;
  padding: 0.8rem 1rem;
}

.manual-layout {
  display: grid;
  width: min(76rem, 100%);
  margin: clamp(3rem, 5vw, 4rem) auto 0;
  align-items: start;
  font-size: var(--manual-font-size);
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.manual-sidebar {
  display: grid;
  align-self: start;
  position: sticky;
  top: 2rem;
  max-height: calc(100vh - 4rem);
  padding: 0 2rem 2rem 1.25rem;
  gap: 2rem;
  grid-template-rows: auto minmax(0, 1fr);
}

.manual-sidebar > .manual-nav {
  min-height: 0;
  overflow-y: auto;
  padding-right: 0.25rem;
  scrollbar-width: thin;
}

.manual-nav section + section {
  margin-top: 2rem;
}

.manual-nav h2 {
  margin: 0 0 0.55rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.75;
  text-transform: uppercase;
}

.manual-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.manual-nav li + li {
  margin-top: 0.2rem;
}

.manual-nav a {
  display: block;
  border-inline-start: 2px solid transparent;
  padding: 0.32rem 0.65rem;
  color: var(--text-muted);
  font-size: 77.5%;
  font-weight: 300;
  text-decoration: none;
}

.manual-nav a:focus-visible {
  outline-offset: -2px;
}

.manual-nav a:hover {
  color: var(--text-strong);
}

.manual-nav a.active {
  border-inline-start-color: var(--accent);
  background: linear-gradient(90deg, var(--accent-soft), transparent);
  color: var(--text-strong);
  font-weight: 700;
}

:dir(rtl) .manual-nav a.active {
  background: linear-gradient(270deg, var(--accent-soft), transparent);
}

.manual-content {
  min-width: 0;
  padding: 0 clamp(1.4rem, 6vw, 5rem) 5rem;
}

.manual-article {
  width: min(var(--content-width), 100%);
  margin: 0 auto;
}

.manual-article h1,
.manual-article h2,
.manual-article h3,
.manual-article h4 {
  color: var(--text-strong);
  font-weight: 700;
}

.manual-article h5,
.manual-article h6 {
  color: var(--text-strong);
  font-size: 100%;
  font-weight: 300;
}

.manual-article h1 {
  margin: 0 0 2rem;
  font-size: 175%;
  line-height: 1.2;
}

.manual-article h2 {
  margin: 3.8rem 0 1.1rem;
  font-size: 130%;
  line-height: 1.3;
}

.manual-article h3 {
  margin: 2.7rem 0 0.9rem;
  font-size: 110%;
  line-height: 1.3;
}

.manual-article h4 {
  font-size: 100%;
  line-height: 1.3;
}

.manual-article p,
.manual-article ul,
.manual-article ol,
.manual-article blockquote {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.manual-article li + li {
  margin-top: 0.35rem;
}

.manual-article li::marker {
  color: var(--marker);
}

.lede {
  max-width: 38rem;
  color: var(--text-muted);
  font-size: 100%;
}

.manual-article code {
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.08em 0.32em;
  background: var(--surface);
  color: var(--code);
  font: inherit;
  font-size: 92.5%;
}

.manual-article pre {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.1rem 1.2rem;
  background: var(--surface);
  font-size: 92.5%;
  line-height: 1.5;
}

.manual-article pre code {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  font-size: 100%;
  line-height: inherit;
}

.manual-article blockquote {
  margin-inline: 0;
  border-inline-start: 3px solid var(--marker);
  padding: 0.2rem 1.2rem;
  background: var(--quote-background);
  color: var(--text);
}

.manual-article blockquote code {
  color: var(--text);
}

.manual-article img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 2rem 0;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
}

.heading-link {
  margin-left: 0.55rem;
  color: var(--border);
  font-size: 0.75em;
  font-weight: 700;
  text-decoration: none;
}

h2:hover .heading-link,
h3:hover .heading-link,
.heading-link:focus {
  color: var(--accent);
}

.contents-grid {
  display: grid;
  margin-top: 3rem;
  gap: 2.5rem 3rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contents-section h2 {
  margin-top: 0;
}

.contents-section ol {
  padding-left: 1.5rem;
}

.pagination {
  display: grid;
  align-items: end;
  margin-top: 5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  gap: 1rem;
  grid-template-columns: 1fr auto 1fr;
}

.pagination a {
  text-decoration: none;
}

.pagination a > span {
  display: block;
  color: var(--text-muted);
  font-size: var(--font-size-small);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pager-next {
  text-align: right;
}

.pager-contents {
  color: var(--text-muted);
  font-size: var(--font-size-small);
  font-weight: 300;
}

.mobile-contents {
  display: none;
}

@media (max-width: 64rem) {
  .manual-layout {
    display: block;
    margin-top: 2.5rem;
  }

  .manual-sidebar {
    display: block;
    position: static;
    max-height: none;
    padding: 0 clamp(1.4rem, 6vw, 5rem);
  }

  .manual-sidebar > .manual-nav {
    display: none;
  }

  .manual-sidebar .manual-search {
    width: min(var(--content-width), 100%);
    margin: 0 auto 2rem;
  }

  .manual-sidebar .search-field,
  .mobile-contents .manual-nav a {
    font-size: 100%;
  }

  .search-shortcut {
    display: none;
  }

  .mobile-contents {
    display: block;
    width: min(var(--content-width), 100%);
    margin: 0 auto 3rem;
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    padding: 0.65rem 0.85rem;
    background: var(--surface);
  }

  .mobile-contents summary {
    color: var(--text-strong);
    cursor: pointer;
    font-weight: 700;
  }

  .mobile-contents .manual-nav {
    margin-top: 1.2rem;
  }
}

@media (max-width: 42rem) {
  .site-header {
    align-items: stretch;
    flex-direction: column;
    gap: 0.7rem;
    padding: 1rem 1.25rem;
  }

  .manual-search {
    width: 100%;
  }

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

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

  .pager-contents {
    display: none;
  }
}

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