:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --ink: #202225;
  --muted: #5f6773;
  --line: #d8ddd5;
  --accent: #176c7a;
  --accent-strong: #0f5662;
  --nav: #263238;
  --code-bg: #f1f3ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.62;
}

.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  padding: 0 28px;
  background: var(--nav);
  color: #f8fbfb;
  border-bottom: 4px solid var(--accent);
}

.brand {
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}

.site-header span {
  color: #d6e0e2;
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 32px;
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 28px;
}

.sidebar {
  align-self: start;
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.sidebar a {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
}

.sidebar a:hover,
.sidebar a[aria-current="page"] {
  color: var(--accent-strong);
  background: #e9f2f1;
}

.content {
  min-width: 0;
  max-width: 920px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

h1,
h2,
h3,
h4 {
  line-height: 1.24;
  margin: 1.6em 0 0.6em;
}

h1 {
  margin-top: 0;
  font-size: 34px;
}

h2 {
  font-size: 24px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

h3 {
  font-size: 19px;
}

p,
ul,
ol,
blockquote,
.table-wrap,
figure,
pre {
  margin: 0 0 18px;
}

ul,
ol {
  padding-left: 24px;
}

li + li {
  margin-top: 5px;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 3px;
}

strong {
  font-weight: 700;
}

code {
  padding: 2px 5px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

pre {
  overflow: auto;
  padding: 14px 16px;
  background: #202225;
  color: #f6f7f8;
  border-radius: 8px;
}

pre code {
  padding: 0;
  background: transparent;
  border: 0;
  color: inherit;
}

blockquote {
  padding: 12px 16px;
  border-left: 4px solid var(--accent);
  background: #eef5f4;
  color: #243036;
}

blockquote p:last-child {
  margin-bottom: 0;
}

figure {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fbfcfb;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
}

figcaption {
  padding: 8px 12px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--line);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef2ee;
  font-weight: 700;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
    padding: 14px 18px;
  }

  .layout {
    display: block;
    padding: 16px;
  }

  .sidebar {
    position: static;
    margin-bottom: 16px;
  }

  .content {
    padding: 22px 18px;
  }

  h1 {
    font-size: 28px;
  }
}

@media print {
  body {
    background: #ffffff;
  }

  .site-header,
  .sidebar {
    display: none;
  }

  .layout,
  .content {
    display: block;
    width: auto;
    max-width: none;
    margin: 0;
    padding: 0;
    border: 0;
  }

  a {
    color: #000000;
  }
}