:root {
  --background: #ffffff;
  --surface: #f4f6f8;
  --text: #202833;
  --muted: #536170;
  --line: #dbe1e7;
  --accent: #174f86;
  --code: #edf2f7;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1rem; }
body { margin: 0; color: var(--text); background: var(--background); font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, main:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip { position: absolute; top: -6rem; left: 1rem; background: var(--background); padding: .5rem 1rem; z-index: 2; }
.skip:focus { top: .5rem; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding: 1.25rem max(1.25rem, calc((100vw - 1260px) / 2)); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; text-decoration: none; color: var(--text); line-height: 1.3; }
.brand span { display: block; font-size: .82rem; color: var(--muted); font-weight: 500; }
.topbar nav { display: flex; gap: 1.25rem; font-size: .9rem; }
.shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 3rem; max-width: 1260px; margin: auto; padding: 2.5rem 1.25rem 4rem; }
aside { font-size: .9rem; }
.eyebrow { font-size: .69rem; letter-spacing: .08em; font-weight: 650; color: var(--muted); }
.guide-nav { display: flex; flex-direction: column; gap: .15rem; }
.guide-nav a { padding: .35rem .65rem; text-decoration: none; border-left: 2px solid transparent; }
.guide-nav a[aria-current="page"] { background: var(--surface); border-color: var(--accent); font-weight: 650; }
.package-name { font: .74rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; overflow-wrap: anywhere; margin-top: 2rem; }
.side-note { color: var(--muted); font-size: .82rem; }
main { min-width: 0; max-width: 880px; }
article > p, article > ul, article > ol { max-width: 74ch; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.025em; }
h1 { font-size: clamp(2rem, 4vw, 3.3rem); margin: 0 0 1.3rem; max-width: 23ch; }
h2 { font-size: 1.7rem; margin: 2.75rem 0 1rem; }
h3 { font-size: 1.25rem; margin-top: 2rem; }
p { margin: 1rem 0; }
code { font: .87em/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--code); padding: .12em .3em; border-radius: 3px; overflow-wrap: anywhere; }
pre { padding: 1.2rem; border: 1px solid var(--line); background: var(--surface); border-radius: 8px; overflow-x: auto; }
pre code { background: transparent; padding: 0; overflow-wrap: normal; white-space: pre; }
table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; font-size: .9rem; margin: 1.5rem 0; }
th, td { border: 1px solid var(--line); padding: .7rem .85rem; text-align: left; vertical-align: top; min-width: 140px; }
th { background: var(--surface); }
blockquote { border-left: 3px solid var(--line); margin-left: 0; padding-left: 1rem; color: var(--muted); }
img { max-width: 100%; height: auto; }
.source-links { display: flex; flex-wrap: wrap; gap: 1.25rem; margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .85rem; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding: 1.5rem max(1.25rem, calc((100vw - 1260px) / 2)); border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
footer p { margin: 0; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; gap: 2rem; padding-top: 1.5rem; }
  .guide-nav { flex-direction: row; flex-wrap: wrap; }
  .guide-nav a { border-left: 0; border-bottom: 2px solid transparent; padding: .25rem .5rem; }
  .package-name, .side-note { display: none; }
}
@media (max-width: 420px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: .75rem; }
  .shell { padding-left: 1rem; padding-right: 1rem; }
}