:root {
  --green: #0b1d3a;
  --gold: #62a8ff;
  --ink: #eaf3ff;
  --muted: #8fa8c7;
  --line: #203a5f;
  --bg: #071225;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    "Avenir Next",
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
}
.manual-header {
  height: 74px;
  background: linear-gradient(90deg,#06152b,#0c2850);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - 1220px) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 5px 24px #0c281e35;
}
.manual-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
}
.manual-brand > span {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: linear-gradient(135deg,#1e5c9f,#70b9ff);
  display: grid;
  place-items: center;
  font: 26px Georgia;
}
.manual-brand b {
  line-height: 1.05;
  letter-spacing: 0.08em;
}
.manual-brand small {
  display: block;
  color: #78b8fa;
  font-size: 9px;
  letter-spacing: 0.35em;
  margin-top: 5px;
}
.manual-header > div {
  display: flex;
  gap: 7px;
}
.manual-header button,
.manual-header > div a {
  border: 1px solid #ffffff45;
  background: #ffffff12;
  color: #fff;
  border-radius: 8px;
  padding: 8px 11px;
  text-decoration: none;
  cursor: pointer;
}
.manual-header button.active {
  background: #fff;
  color: var(--green);
}
.manual-hero {
  background: radial-gradient(circle at 80% 10%,#1a5795,transparent 35%),linear-gradient(130deg,#06152b,#0e315e);
  color: #fff;
  padding: 58px max(24px, calc((100vw - 1220px) / 2)) 64px;
}
.manual-hero h1 {
  font-size: 42px;
  letter-spacing: -0.035em;
  margin: 8px 0 12px;
}
.manual-hero p {
  max-width: 760px;
  margin: 0;
  color: #bad0e8;
  line-height: 1.7;
}
.manual-hero #eyebrow {
  color: #76baff;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  font-weight: 800;
}
.manual-layout {
  max-width: 1220px;
  margin: 28px auto 60px;
  display: grid;
  grid-template-columns: 235px 1fr;
  gap: 24px;
  padding: 0 20px;
}
.manual-layout aside {
  position: sticky;
  top: 98px;
  align-self: start;
  background: #0d203d;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}
.manual-layout aside strong {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.1em;
}
.manual-layout nav {
  display: grid;
  gap: 4px;
  margin-top: 12px;
}
.manual-layout nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 9px;
  border-radius: 7px;
  font-size: 13px;
}
.manual-layout nav a:hover {
  background: #15365d;
  color: #8bc8ff;
}
.guide {
  background: #0d203d;
  border: 1px solid var(--line);
  border-radius: 16px;
  margin-bottom: 20px;
  overflow: hidden;
  scroll-margin-top: 96px;
}
.guide-head {
  padding: 24px 26px 18px;
}
.guide-kicker {
  color: var(--gold);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.guide h2 {
  margin: 5px 0 7px;
  font-size: 25px;
}
.guide-summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}
.guide-visual {
  background: #091a32;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px;
}
.guide-visual svg {
  width: 100%;
  height: auto;
  display: block;
}
.guide-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 23px 26px 28px;
}
.guide-body h3 {
  font-size: 14px;
  margin: 0 0 10px;
  color: #8bc8ff;
}
.steps {
  margin: 0;
  padding-left: 20px;
  color: #bdd0e4;
  line-height: 1.75;
}
.example {
  margin: 0;
  background: #091a32;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 7px 12px;
  font-size: 13px;
}
.example dt {
  color: var(--muted);
}
.example dd {
  margin: 0;
  font-weight: 650;
  overflow-wrap: anywhere;
}
.topic-link {
  display: inline-block;
  margin-top: 16px;
  color: #8bc8ff;
  font-weight: 700;
  text-decoration: none;
}
footer {
  text-align: center;
  color: var(--muted);
  padding: 28px;
  border-top: 1px solid var(--line);
  background: #091a32;
}
@media (max-width: 800px) {
  .manual-layout {
    grid-template-columns: 1fr;
  }
  .manual-layout aside {
    position: static;
  }
  .manual-layout nav {
    grid-template-columns: 1fr 1fr;
  }
  .guide-body {
    grid-template-columns: 1fr;
  }
  .manual-hero h1 {
    font-size: 32px;
  }
}
@media (max-width: 480px) {
  .manual-brand b {
    display: none;
  }
  .manual-layout nav {
    grid-template-columns: 1fr;
  }
  .guide-head,
  .guide-body {
    padding-left: 18px;
    padding-right: 18px;
  }
}