@import url("https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700&family=Barlow+Condensed:ital,wght@0,600;1,600;1,700&family=JetBrains+Mono:wght@400;600&display=swap");

:root {
  --bg: #17181a;
  --bg-soft: #1f2125;
  --panel: #111214;
  --panel-soft: #1d1f23;
  --ink: #1d1f23;
  --ink-soft: #4d5158;
  --text: #f3f4f6;
  --text-soft: #c5c9cf;
  --line: #3b3f46;
  --brand-yellow: #ffc835;
  --brand-yellow-soft: #ffdb77;
  --brand-blue: #007bff;
  --brand-blue-soft: #6db2ff;
  --code-bg: #111317;
  --code-text: #e7edf5;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Barlow", Arial, sans-serif;
  color: var(--text);
  line-height: 1.72;
  background:
    radial-gradient(1200px 380px at 10% -8%, rgba(255, 200, 53, 0.11), transparent 65%),
    radial-gradient(980px 360px at 92% -8%, rgba(0, 123, 255, 0.12), transparent 65%),
    linear-gradient(180deg, #17181a 0%, #1b1c1f 100%);
}

#header,
#content,
#footer {
  max-width: 1220px;
  margin: 0 auto;
  padding-left: 1.2rem;
  padding-right: 1.2rem;
}

#header {
  padding-top: 2.2rem;
}

#header > h1 {
  margin: 0;
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3.3rem);
  font-style: italic;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: #ffffff;
}

#header .details {
  margin-top: 0.75rem;
  color: var(--text-soft);
  font-size: 0.98rem;
}

#content {
  margin-top: 1.35rem;
  margin-bottom: 3rem;
}

#toc.toc,
#toc.toc2 {
  margin-top: 1.1rem;
  background: linear-gradient(180deg, rgba(17, 18, 20, 0.96), rgba(24, 26, 30, 0.94));
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand-yellow);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

#toc {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 200, 53, 0.7) rgba(17, 18, 20, 0.95);
}

#toc::-webkit-scrollbar {
  width: 11px;
}

#toc::-webkit-scrollbar-track {
  background: rgba(17, 18, 20, 0.95);
  border-radius: 999px;
}

#toc::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(255, 200, 53, 0.9), rgba(0, 123, 255, 0.82));
  border: 2px solid rgba(17, 18, 20, 0.95);
  border-radius: 999px;
}

#toc::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(255, 219, 119, 0.95), rgba(109, 178, 255, 0.95));
}

#toctitle {
  margin: 0;
  padding: 0.95rem 1.05rem;
  border-bottom: 1px solid var(--line);
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: 1.02rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--brand-yellow-soft);
}

#toc ul {
  margin: 0;
  padding: 0.45rem 0.55rem 0.95rem;
  list-style: none;
}

#toc a {
  display: block;
  padding: 0.36rem 0.55rem;
  margin: 0.1rem 0;
  color: #e6e9ee;
  text-decoration: none;
  border-radius: 8px;
  transition: background-color 140ms ease, color 140ms ease;
}

#toc a:hover,
#toc a:focus-visible {
  background: linear-gradient(90deg, rgba(255, 200, 53, 0.2), rgba(0, 123, 255, 0.2));
  color: #ffffff;
}

#toc .sectlevel2 a {
  font-size: 0.93rem;
  color: #c2c8d1;
}

.sect1,
.sect2,
.sect3 {
  scroll-margin-top: 2.4rem;
}

#content > .sect1 {
  margin-top: 1.2rem;
  padding: 1.4rem;
  border-radius: var(--radius);
  background: #f5f6f8;
  color: var(--ink);
  border: 1px solid #e1e4e8;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
}

#content > .sect1 + .sect1 {
  margin-top: 1rem;
}

#content .sectionbody {
  margin-top: 0.7rem;
}

#content .sect2 {
  margin-top: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 11px;
  background: #ffffff;
  border: 1px solid #d9dde2;
}

h2,
h3,
h4 {
  margin-top: 0;
  line-height: 1.25;
}

h2 {
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: clamp(1.45rem, 2.2vw, 1.95rem);
  font-style: italic;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.015em;
  color: #191b1f;
  margin-bottom: 0.95rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid rgba(255, 200, 53, 0.65);
}

#content > .sect1 > h2.chapter-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
}

#content > .sect1 > h2.chapter-toggle::after {
  content: "-";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 999px;
  font-family: "Barlow", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #111214;
  background: linear-gradient(180deg, rgba(255, 200, 53, 0.95), rgba(255, 219, 119, 0.95));
  border: 1px solid rgba(0, 0, 0, 0.2);
}

#content > .sect1.is-collapsed > h2.chapter-toggle::after {
  content: "+";
}

#content > .sect1 > h2.chapter-toggle:focus-visible {
  outline: 2px solid rgba(0, 123, 255, 0.75);
  outline-offset: 0.2rem;
  border-radius: 0.35rem;
}

#content > .sect1.is-collapsed {
  padding-bottom: 0.95rem;
}

#content > .sect1.is-collapsed .sectionbody {
  display: none;
}

h3 {
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: clamp(1.12rem, 1.5vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #23262c;
  margin-bottom: 0.56rem;
}

p,
li,
td,
th {
  color: inherit;
}

#content .paragraph p,
#content li,
#content td,
#content th {
  max-width: 80ch;
  color: #23262c;
}

#content .paragraph p {
  line-height: 1.8;
}

a {
  color: var(--brand-blue);
}

a:hover {
  color: #005bcc;
}

ul,
ol {
  padding-left: 1.3rem;
}

li + li {
  margin-top: 0.35rem;
}

code,
kbd {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
  background: #eceff3;
  border: 1px solid #d2d8df;
  border-radius: 7px;
  padding: 0.08rem 0.35rem;
  color: #2b3340;
}

pre,
.listingblock .content {
  border-radius: var(--radius-sm);
}

.listingblock .content {
  border: 1px solid #2e3440;
  overflow-x: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 8px 18px rgba(0, 0, 0, 0.28);
}

.listingblock pre,
.listingblock pre code {
  margin: 0;
  background: var(--code-bg) !important;
  color: var(--code-text) !important;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  padding: 1rem 1.1rem;
}

.admonitionblock,
.exampleblock,
.sidebarblock,
.quoteblock,
.literalblock {
  margin: 1rem 0;
}

.tableblock,
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid #cfd4da;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #ffffff;
}

thead {
  background: linear-gradient(90deg, #f0f3f6, #e9edf2);
}

th,
td {
  padding: 0.66rem 0.76rem;
  border-bottom: 1px solid #d5dae0;
  color: #20242a;
}

tr:last-child td {
  border-bottom: none;
}

#footer {
  margin: 2rem auto 2.6rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

@media (min-width: 1080px) {
  body.toc2 #header,
  body.toc2 #content,
  body.toc2 #footer {
    margin-left: 21rem;
    max-width: 1160px;
  }

  body.toc2 #toc.toc2,
  body #toc.toc {
    position: fixed;
    left: 1.15rem;
    top: 1rem;
    width: 18.6rem;
    max-height: calc(100vh - 2rem);
    overflow: auto;
    margin-top: 0;
  }
}

@media (max-width: 1079px) {
  #header,
  #content,
  #footer {
    max-width: 940px;
  }

  #toc {
    max-height: 45vh;
    overflow: auto;
  }
}

@media (max-width: 760px) {
  #header {
    padding-top: 1.1rem;
  }

  #header,
  #content,
  #footer {
    padding-left: 0.86rem;
    padding-right: 0.86rem;
  }

  #content > .sect1 {
    padding: 1rem;
    border-radius: 13px;
  }

  .listingblock pre,
  .listingblock pre code {
    font-size: 0.84rem;
    padding: 0.84rem;
  }
}