:root {
  --bg: #fff;
  --panel: #f5f5f7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --link: #06c;
  --link-hover: #004b9b;
  --code: #f2f2f4;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.47059;
}

a {
  color: inherit;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--code);
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.92em;
}

.globalbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 0 max(22px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(0, 0, 0, 0.14);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
}

.globalbar__brand {
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.globalbar__nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

.globalbar__nav a {
  text-decoration: none;
}

.globalbar__nav a:hover,
.link:hover,
.article-nav a:hover {
  color: var(--link-hover);
}

.guide-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  width: min(1180px, 100%);
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 49px;
  align-self: start;
  height: calc(100vh - 49px);
  padding: 32px 24px 40px;
  border-right: 1px solid var(--line);
  overflow: auto;
}

.sidebar__title {
  margin-bottom: 18px;
  font-size: 18px;
  font-weight: 600;
}

.toc {
  display: grid;
  gap: 2px;
}

.toc__link {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.toc__link:hover,
.toc__link--active {
  color: var(--text);
  font-weight: 600;
}

.content {
  min-width: 0;
  padding: 44px 42px 72px;
}

.breadcrumb {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.article {
  max-width: 760px;
}

.book-content {
  max-width: 920px;
}

.article h1 {
  margin: 0 0 18px;
  font-size: 48px;
  line-height: 1.08349;
  letter-spacing: 0;
}

.article h2 {
  margin: 42px 0 12px;
  padding-top: 2px;
  font-size: 28px;
  line-height: 1.14286;
  letter-spacing: 0;
}

.article h3 {
  margin: 28px 0 8px;
  font-size: 21px;
  line-height: 1.19048;
}

.article p,
.article li {
  color: var(--text);
  font-size: 17px;
}

.intro {
  margin: 0 0 34px;
  color: var(--muted);
  font-size: 21px;
}

.article section {
  border-top: 1px solid var(--line);
  margin-top: 3.15em;
  padding-top: 3.15em;
}

.article section:first-of-type {
  border-top: 0;
}

.topic-header {
  margin-bottom: 34px;
}

.callout {
  padding: 24px !important;
  border: 0 !important;
  border-radius: 8px;
  background: var(--panel);
}

.callout h2 {
  margin-top: 0;
}

.steps {
  margin: 14px 0 0;
  padding-left: 24px;
}

.steps li {
  margin-bottom: 18px;
  padding-left: 4px;
}

.steps li::marker {
  font-weight: 600;
}

.guide-figure {
  margin: 18px 0 6px;
}

.guide-figure img {
  display: block;
  width: min(100%, 390px);
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.topic-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 330px);
  align-items: flex-start;
  gap: 48px;
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.topic-block--reverse {
  grid-template-columns: minmax(240px, 330px) minmax(0, 1fr);
}

.topic-block--reverse .topic-block__copy {
  grid-column: 2;
}

.topic-block--reverse .topic-block__media {
  grid-column: 1;
  grid-row: 1;
}

.topic-block__copy h2,
.topic-note h2 {
  margin-top: 0;
}

.topic-block__copy p:last-child,
.topic-note p:last-child {
  margin-bottom: 0;
}

.step-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px !important;
  font-weight: 600;
}

.topic-block__media {
  margin: 0;
  width: 207px;
}

.topic-block__media_windows {
  margin: 0;
}

.topic-block__media img {
  display: block;
  width: 100%;
  height: auto;
}

.topic-block__media_windows img {
  display: block;
  width: 100%;
  height: auto;
}

.topic-note {
  margin-top: 18px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.topic-list {
  border-top: 1px solid var(--line);
}

.topic {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.topic strong,
.topic small {
  display: block;
}

.topic strong {
  font-size: 17px;
}

.topic small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 14px;
}

.chevron {
  color: var(--muted);
  font-size: 24px;
  line-height: 1;
}

.link,
.article-nav a {
  color: var(--link);
  text-decoration: none;
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 54px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 17px;
}

.article-nav__next {
  margin-left: auto;
  text-align: right;
}

@media (max-width: 860px) {
  .globalbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 12px 18px;
  }

  .globalbar__nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .guide-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    padding: 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }

  .content {
    padding: 34px 20px 54px;
  }

  .article h1 {
    font-size: 38px;
  }

  .intro {
    font-size: 19px;
  }

  .topic-block,
  .topic-block--reverse {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 38px 0;
  }

  .topic-block--reverse .topic-block__copy,
  .topic-block--reverse .topic-block__media {
    grid-column: auto;
    grid-row: auto;
  }

  .topic-block__media img {
    width: min(100%, 360px);
  }
}

@media (max-width: 520px) {
  .globalbar__nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

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

  .article h1 {
    font-size: 34px;
  }

  .article h2 {
    font-size: 25px;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav__next {
    margin-left: 0;
    text-align: left;
  }
}