:root {
  --ink: #1f2a37;
  --muted: #5a6a7e;
  --line: #e3e8ef;
  --bg: #f7f9fc;
  --card: #fff;
  --accent: #1e2f4a;
  --callout: #eef4fb;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
header.doc-head { margin-bottom: 24px; }
.practice { font-size: 14px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); margin: 0 0 4px; }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 8px; color: var(--accent); }
.updated { color: var(--muted); font-size: 14px; margin: 0; }
nav.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; }
nav.toc a {
  font-size: 14px; font-weight: 500; text-decoration: none; color: var(--accent);
  border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 6px 14px;
}
nav.toc a:hover { border-color: var(--accent); }
section.doc {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 32px; margin-top: 24px;
}
section.doc > h2:first-child { margin-top: 0; font-size: 24px; color: var(--accent); }
h2 { font-size: 19px; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 4px; }
code { font: 600 14px/1 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--callout); padding: 2px 6px; border-radius: 4px; }
.callout { background: var(--callout); border-radius: 8px; padding: 16px 18px; margin: 12px 0 16px; }
.callout p:last-child { margin-bottom: 0; }
a { color: #1f5fa8; }
address { font-style: normal; }
footer { color: var(--muted); font-size: 13px; margin-top: 32px; text-align: center; }
@media (max-width: 560px) {
  h1 { font-size: 25px; }
  section.doc { padding: 22px 18px; }
}