:root {
  --bg: #eef2f7;
  --ink: #121826;
  --ink-soft: #5a6578;
  --ink-faint: #8a93a3;
  --surface: #ffffff;
  --line: rgba(18, 24, 38, 0.1);
  --accent: #0b5fff;
  --accent-soft: rgba(11, 95, 255, 0.1);
  --font: "Public Sans", "Segoe UI", sans-serif;
  --display: "Newsreader", "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 60% 40% at 10% 0%, rgba(11, 95, 255, 0.1), transparent),
    var(--bg);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration: none;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 8px;
}

.brand-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
}

.topnav {
  display: flex;
  gap: 1.1rem;
  margin-left: 0.5rem;
}

.topnav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
}

.topnav a[aria-current="page"],
.topnav a:hover {
  color: var(--ink);
}

.layout {
  display: grid;
  gap: 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 4rem;
}

@media (min-width: 880px) {
  .layout {
    grid-template-columns: 180px 1fr;
    align-items: start;
  }

  .toc {
    position: sticky;
    top: 1.25rem;
  }
}

.toc {
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.toc-label {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.toc a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

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

.doc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.6rem 1.5rem 2rem;
  box-shadow: 0 14px 40px rgba(20, 40, 80, 0.06);
}

.kicker {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.doc h1 {
  margin: 0 0 0.65rem;
  font-family: var(--display);
  font-size: clamp(1.85rem, 3.8vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.doc .lede {
  margin: 0 0 1.75rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
  max-width: 40rem;
}

.doc section {
  padding-top: 0.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.doc h2 {
  margin: 0 0 0.7rem;
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.doc p,
.doc li {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.doc p {
  margin: 0 0 0.85rem;
}

.doc ul,
.doc ol {
  margin: 0 0 0.85rem;
  padding-left: 1.2rem;
}

.doc li {
  margin-bottom: 0.45rem;
}

.doc h3 {
  margin: 1rem 0 0.55rem;
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 600;
}

.doc strong {
  color: var(--ink);
  font-weight: 600;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  font-weight: 500;
  background: var(--accent-soft);
  color: #0747c7;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  margin: 0 0 1rem;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background: #121826;
  color: #e8eef8;
  overflow-x: auto;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1rem;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.7rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-weight: 600;
  color: var(--ink);
  background: #f6f8fb;
}

td {
  color: var(--ink-soft);
}

@media (max-width: 560px) {
  .doc {
    padding: 1.25rem 1rem 1.6rem;
  }

  .topnav {
    margin-left: auto;
  }
}