:root {
  color-scheme: light;
  --ink: #17191f;
  --muted: #606778;
  --line: #dfe3eb;
  --surface: #ffffff;
  --canvas: #f3f5f8;
  --header: #17191f;
  --blue: #355bd6;
  --blue-dark: #2547b5;
  --green: #087b5b;
  --warning: #9a5b00;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--blue-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px clamp(18px, 4vw, 56px);
  color: #fff;
  background: var(--header);
  border-bottom: 1px solid #2c3039;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: #fff;
  text-decoration: none;
}

.brand:hover {
  color: #fff;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: #fff;
  border-radius: 6px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand small {
  margin-top: 3px;
  color: #b9bfca;
  font-size: 11px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-header nav a {
  color: #d9dde6;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a:hover {
  color: #fff;
}

.site-shell {
  width: min(1440px, 100%);
  min-height: calc(100vh - 130px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 245px minmax(0, 1fr);
}

.sidebar {
  padding: 38px 22px 48px;
  border-right: 1px solid var(--line);
  background: #f8f9fb;
}

.sidebar-label {
  margin: 0 10px 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.sidebar a {
  display: block;
  padding: 8px 10px;
  color: #343946;
  border-left: 3px solid transparent;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.sidebar a:hover {
  color: var(--blue-dark);
  border-left-color: var(--blue);
  background: #edf1fd;
}

.sidebar hr {
  margin: 22px 10px;
  border: 0;
  border-top: 1px solid var(--line);
}

.content {
  width: min(940px, calc(100% - 48px));
  margin: 0 auto;
  padding: 48px 0 80px;
}

.content h1,
.content h2,
.content h3 {
  line-height: 1.25;
  scroll-margin-top: 88px;
}

.content h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 5vw, 52px);
}

.content h2 {
  margin: 48px 0 14px;
  padding-top: 4px;
  font-size: 27px;
  border-top: 1px solid var(--line);
}

.content h2:first-of-type {
  border-top: 0;
}

.content h3 {
  margin: 30px 0 10px;
  font-size: 20px;
}

.content p,
.content li {
  max-width: 78ch;
}

.content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 28px 0;
  border: 1px solid #cad0da;
  border-radius: 6px;
  box-shadow: 0 16px 38px rgba(25, 31, 43, 0.12);
}

.content table {
  width: 100%;
  margin: 20px 0 30px;
  border-collapse: collapse;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(25, 31, 43, 0.06);
}

.content th,
.content td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border: 1px solid var(--line);
}

.content th {
  background: #eceff5;
  font-size: 13px;
}

.content code {
  padding: 2px 5px;
  color: #263250;
  background: #e9edf5;
  border-radius: 3px;
  font-size: 0.9em;
}

.content pre {
  overflow-x: auto;
  margin: 18px 0 28px;
  padding: 18px;
  color: #e8ebf2;
  background: #1d2129;
  border: 1px solid #303641;
  border-radius: 6px;
}

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

.content blockquote {
  margin: 24px 0;
  padding: 14px 18px;
  color: #39404d;
  background: #edf1fd;
  border-left: 4px solid var(--blue);
}

.content blockquote p {
  margin: 0;
}

.content input[type="checkbox"] {
  accent-color: var(--blue);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 20px clamp(18px, 4vw, 56px);
  color: #bcc2cc;
  background: var(--header);
  font-size: 13px;
}

footer a {
  color: #fff;
}

@media (max-width: 860px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header nav {
    width: 100%;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

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

  .site-shell {
    display: block;
  }

  .sidebar {
    display: flex;
    gap: 5px;
    overflow-x: auto;
    padding: 12px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    scrollbar-width: none;
  }

  .sidebar-label,
  .sidebar hr {
    display: none;
  }

  .sidebar a {
    flex: 0 0 auto;
    border-left: 0;
    border-bottom: 3px solid transparent;
  }

  .sidebar a:hover {
    border-left-color: transparent;
    border-bottom-color: var(--blue);
  }

  .content {
    width: min(100% - 32px, 940px);
    padding-top: 34px;
  }

  .content h1 {
    font-size: 36px;
  }

  .content h2 {
    font-size: 24px;
  }

  .content table {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .site-header nav a:last-child {
    display: none;
  }

  .content {
    width: min(100% - 24px, 940px);
  }

  .content h1 {
    font-size: 32px;
  }

  footer {
    flex-direction: column;
  }
}