:root {
  color-scheme: dark;
  --bg: #0c1018;
  --panel: #111925;
  --line: #293546;
  --text: #f4f6fa;
  --muted: #aebbd0;
  --accent: #ffa48c;
  --accent-panel: #231a24;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font: 16px/1.65 system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
body.orbit { --accent: #9fe8ff; --accent-panel: #112535; }
a { color: inherit; }
a:focus-visible, pre:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip { position: fixed; left: 1rem; top: -8rem; padding: .5rem 1rem; background: var(--panel); z-index: 2; }
.skip:focus { top: 1rem; }
.masthead { min-height: 68px; padding: .7rem clamp(1rem, 4vw, 3.5rem); border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.brand, .switch { display: flex; align-items: center; gap: .55rem; text-decoration: none; }
.brand { color: var(--accent); font: 700 .82rem/1.4 var(--mono); letter-spacing: .1em; }
.brand svg { flex-shrink: 0; }
.switch { color: var(--muted); font-size: .875rem; }
.switch:hover, nav a:hover { color: var(--accent); }
.layout { display: grid; grid-template-columns: 235px minmax(0, 1fr); max-width: 1440px; margin: 0 auto; }
aside { padding: 2.5rem 1.5rem; border-right: 1px solid var(--line); }
nav { position: sticky; top: 2rem; }
.eyebrow, .section-label { color: var(--accent); font: 600 .74rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .09em; }
nav p { margin: 0 0 1rem; }
nav a { display: flex; gap: .6rem; text-decoration: none; color: var(--muted); font-size: .875rem; padding: .42rem 0; }
nav a span { font: .72rem/2 var(--mono); color: var(--accent); }
main { min-width: 0; padding: clamp(1.25rem, 4vw, 3.5rem); }
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1rem, 3vw, 2.5rem); align-items: center; padding: clamp(1.25rem, 3vw, 2.75rem); background: var(--panel); border: 1px solid var(--line); border-top-color: var(--accent); }
.eyebrow i { display: inline-block; width: .45rem; height: .45rem; margin: 0 .35rem .06rem 0; background: var(--accent); border-radius: 50%; }
.divider { opacity: .75; margin: 0 .2rem; }
h1, h2 { line-height: 1.12; letter-spacing: -.045em; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 5vw, 4.7rem); margin: .65rem 0 1rem; }
h2 { font-size: clamp(1.55rem, 3vw, 2.35rem); margin: .35rem 0 .8rem; }
p { color: var(--muted); max-width: 69ch; }
.hero p { margin: 0 0 1.3rem; }
.action { display: inline-flex; gap: .8rem; align-items: center; padding: .45rem .75rem; border: 1px solid var(--accent); color: var(--accent); font-size: .875rem; font-weight: 650; text-decoration: none; }
.action:hover { background: var(--accent); color: var(--bg); }
.diagram { min-width: 0; margin: 0; color: var(--accent); border: 1px solid var(--line); background-color: var(--accent-panel); background-image: linear-gradient(#8292a51f 1px, transparent 1px), linear-gradient(90deg, #8292a51f 1px, transparent 1px); background-size: 22px 22px; }
.diagram svg { width: 100%; height: auto; display: block; }
.points { fill: currentColor; }
figcaption, .example-label { display: flex; justify-content: space-between; padding: .5rem .75rem; font: .68rem/1.5 var(--mono); letter-spacing: .06em; border-top: 1px solid var(--line); }
section { padding: clamp(1.5rem, 4vw, 2.75rem) 0; border-bottom: 1px solid var(--line); scroll-margin-top: 1rem; }
section p { margin: .5rem 0 1rem; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 1.25rem 0 0; background: var(--line); border: 1px solid var(--line); }
.facts div { background: var(--panel); padding: .75rem 1rem; }
dt { color: var(--muted); font-size: .8rem; }
dd { margin: .2rem 0 0; font-weight: 600; }
code { font-family: var(--mono); font-size: .9em; color: var(--accent); overflow-wrap: anywhere; }
.steps { max-width: 70ch; padding-left: 1.5rem; color: var(--muted); }
.steps li { padding-left: .35rem; margin-bottom: .6rem; }
.steps li::marker { color: var(--accent); font-family: var(--mono); }
.example, .card { background: var(--panel); border: 1px solid var(--line); }
.example-label { border-top: 0; border-bottom: 1px solid var(--line); color: var(--muted); }
pre { margin: 0; padding: .85rem 1rem; overflow-x: auto; }
.card { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem; text-decoration: none; }
.card strong, .summary { display: block; }
.summary { color: var(--muted); font-size: .9rem; }
.arrow { color: var(--accent); font-size: 1.25rem; }
.card:hover { border-color: var(--accent); }
footer { color: var(--muted); padding: 1.25rem 0 0; font-size: .85rem; }
@media (max-width: 1050px) {
  .layout { grid-template-columns: 190px minmax(0, 1fr); }
  .hero { grid-template-columns: 1fr; }
  .diagram { max-width: 420px; }
}
@media (max-width: 720px) {
  .layout { display: block; }
  aside { border-right: 0; border-bottom: 1px solid var(--line); padding: .75rem 1.25rem; }
  nav { display: flex; flex-wrap: wrap; gap: .2rem 1rem; }
  nav p { flex-basis: 100%; margin: 0; }
  nav a { padding: .15rem 0; }
}
@media (max-width: 420px) {
  .brand { letter-spacing: .04em; }
  .switch { font-size: .78rem; }
  .facts { grid-template-columns: 1fr; }
}