:root {
  color-scheme: light;
  --page-bg: #ecebe7;
  --surface: #fff;
  --surface-soft: #f5f5f2;
  --text: #2d302f;
  --muted: #676c69;
  --line: #d7d8d3;
  --accent: #2f6fa9;
  --accent-dark: #17476f;
  --code-bg: #f1f2ef;
  --code-line: #d1d5d0;
  --focus: #f0a900;
  --max-width: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--page-bg);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.14em;
}

a:hover {
  color: var(--accent-dark);
}

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

img {
  max-width: 100%;
  height: auto;
}

.page-width {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -10rem;
  left: 1rem;
  z-index: 10;
  padding: 0.6rem 0.9rem;
  color: #fff;
  background: var(--accent-dark);
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  padding: 2rem 0 1.35rem;
  color: #fff;
  background: linear-gradient(180deg, #4f86b6 0%, #285f91 100%);
  border-top: 0.35rem solid #173d61;
}

.site-title,
.tagline {
  margin: 0;
}

.site-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

.tagline {
  margin-top: 0.3rem;
  color: #e9f4ff;
  font-size: 1.05rem;
}

.site-nav {
  color: #fff;
  background: linear-gradient(180deg, #78afe0 0%, #3e7fba 48%, #28649e 100%);
  box-shadow: inset 0 1px rgb(255 255 255 / 28%), inset 0 -1px rgb(0 0 0 / 18%);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: 0.75rem 1rem;
  color: #fff;
  border-right: 1px solid rgb(255 255 255 / 28%);
  text-decoration: none;
  text-shadow: 0 1px 1px rgb(0 0 0 / 28%);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgb(16 63 105 / 32%);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16.5rem;
  gap: 2.5rem;
  margin-block: 2rem;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 0.3rem 1.2rem rgb(0 0 0 / 7%);
}

main {
  min-width: 0;
}

h1,
h2,
h3,
h4 {
  color: #263f56;
  line-height: 1.25;
}

h1 {
  margin-top: 0;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

h2 {
  margin-top: 1.7em;
  font-size: 1.45rem;
}

h3 {
  margin-top: 1.5em;
  font-size: 1.2rem;
}

.sidebar {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
  font-size: 0.95rem;
}

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

.sidebar h2 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
}

.sidebar ul {
  margin: 0;
  padding-left: 1.1rem;
}

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

.article-body :first-child,
.section-intro :first-child {
  margin-top: 0;
}

.article-body p,
.article-body li {
  max-width: 75ch;
}

.article-body code,
.section-intro code {
  padding: 0.08em 0.3em;
  border: 1px solid var(--code-line);
  border-radius: 0.22rem;
  background: var(--code-bg);
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.article-body pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--code-line);
  border-radius: 0.35rem;
  background: var(--code-bg);
  line-height: 1.5;
}

.article-body pre code {
  padding: 0;
  border: 0;
  background: transparent;
  overflow-wrap: normal;
}

.article-body table {
  display: block;
  width: 100%;
  margin: 1.25rem 0;
  overflow-x: auto;
  border-collapse: collapse;
}

.article-body th,
.article-body td {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.article-body tr:nth-child(even) {
  background: var(--surface-soft);
}

.breadcrumb {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.article-back {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.all-articles {
  margin-top: 2.5rem;
}

.article-group {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.article-group h3 {
  margin-top: 0;
}

.article-list {
  padding-left: 1.25rem;
}

.article-list li + li {
  margin-top: 0.25rem;
}

.section-article-list {
  margin-top: 1.5rem;
  padding: 1.1rem 1.1rem 1.1rem 2.4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}

.section-article-list li + li {
  margin-top: 0.55rem;
}

.site-footer {
  padding: 1rem 0 2rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 48rem) {
  .layout {
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-block: 1rem;
  }

  .sidebar {
    padding-top: 1.5rem;
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 32rem) {
  .page-width {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .layout {
    padding: 1rem;
  }

  .site-nav a {
    padding-inline: 0.75rem;
  }
}

@media print {
  body {
    background: #fff;
    font-size: 11pt;
  }

  .site-nav,
  .sidebar,
  .article-back,
  .skip-link {
    display: none;
  }

  .site-header {
    padding: 0 0 1rem;
    color: #000;
    background: #fff;
    border: 0;
  }

  .tagline {
    color: #333;
  }

  .layout {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
  }
}