:root {
  --bg: #f6f8fa;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --panel: #ffffff;
  --code-bg: #eef2f6;
  --accent: #0969da;
  --ok: #1a7f37;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}

header, main, footer {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
}

header {
  padding: 34px 0 18px;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h1 a { color: inherit; text-decoration: none; }

header p, footer p {
  margin: 0;
  color: var(--muted);
}

main { padding: 18px 0 36px; }

section {
  margin: 24px 0;
}

.node {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.node + .node { margin-top: 18px; }

.node.muted { background: #fbfcfd; }

h2 {
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 1.35rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

p { margin: 0 0 12px; }

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

code {
  padding: 0.12em 0.28em;
  border-radius: 4px;
  background: var(--code-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.93em;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0d1117;
  color: #e6edf3;
}

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

ul {
  margin: 0;
  padding-left: 1.25rem;
}

li + li { margin-top: 6px; }

.dot-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
}

.dot-table td {
  padding: 9px 10px;
  border-top: 1px dotted #b9c2cc;
  vertical-align: top;
}

.dot-table tr:first-child td { border-top: 0; }

.dot-table td:first-child {
  width: 220px;
  color: var(--muted);
  font-weight: 650;
}

.ok { color: var(--ok); }

.copy-row {
  display: flex;
  justify-content: flex-end;
  margin: -4px 0 8px;
}

button {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--fg);
  cursor: pointer;
  font: inherit;
  font-weight: 650;
  padding: 6px 12px;
}

button:hover, button:focus-visible {
  border-color: var(--accent);
  outline: none;
}

footer {
  padding: 18px 0 30px;
  border-top: 1px solid var(--line);
}

@media (max-width: 680px) {
  header, main, footer { width: min(100% - 20px, 980px); }
  .node { padding: 14px; }
  .dot-table td { display: block; width: 100%; padding-left: 0; padding-right: 0; }
  .dot-table td:first-child { width: 100%; padding-bottom: 0; }
  .dot-table td + td { border-top: 0; padding-top: 2px; }
}