:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --code-bg: #f5f5f7;
  --accent: #2f6fdb;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --fg: #e8e8ea;
    --muted: #8e8e93;
    --line: #2a2a2e;
    --code-bg: #1b1b1f;
    --accent: #7aa7ff;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  /* lines the brand up with the sidebar inside the centred layout */
  padding: 0 max(24px, calc((100% - 1080px) / 2 + 24px));
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }

.menu-toggle {
  display: none;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
}

/* layout */

.layout {
  display: flex;
  max-width: 1080px;
  margin: 0 auto;
}

.sidebar {
  flex: 0 0 220px;
  position: sticky;
  top: 0;
  align-self: flex-start;
  max-height: 100vh;
  overflow-y: auto;
  padding: 32px 24px;
  font-size: 14px;
}

.sidebar .group {
  margin: 24px 0 6px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.sidebar .group:first-child { margin-top: 0; }

.sidebar ul { list-style: none; margin: 0; padding: 0; }

.sidebar a {
  display: block;
  padding: 3px 0;
  color: var(--muted);
}
.sidebar a:hover { color: var(--fg); text-decoration: none; }
.sidebar a.active { color: var(--fg); font-weight: 500; }

.content {
  flex: 1;
  min-width: 0;
  max-width: 760px;
  padding: 32px 24px 96px;
}

/* typography */

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.015em; }
h1 { font-size: 2rem; margin: 0 0 24px; }
h2 { font-size: 1.35rem; margin: 48px 0 12px; padding-top: 8px; }
h3 { font-size: 1.05rem; margin: 32px 0 8px; }

p, ul, ol { margin: 0 0 16px; }
li { margin: 4px 0; }

hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  margin: 0 0 20px;
  padding: 14px 16px;
  background: var(--code-bg);
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
}
pre code { background: none; padding: 0; font-size: inherit; }

/* kramdown wraps code blocks in .highlight divs */
div.highlight, figure.highlight { margin: 0; }

table {
  display: block;
  overflow-x: auto;
  width: 100%;
  margin: 0 0 20px;
  border-collapse: collapse;
  font-size: 14.5px;
}
th, td {
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th { font-weight: 600; }
td code { white-space: nowrap; }

/* mobile */

@media (max-width: 760px) {
  .top { padding: 0 16px; }
  .menu-toggle { display: block; }
  .layout { display: block; }
  .sidebar {
    display: none;
    position: static;
    max-height: none;
    padding: 16px;
    border-bottom: 1px solid var(--line);
  }
  #menu:checked + .layout .sidebar { display: block; }
  .content { padding: 24px 16px 64px; }
  h1 { font-size: 1.6rem; }
}