:root {
  color-scheme: light;
  --ground: #F5F4FA; --surface: #FFFFFF; --raised: #EDEAF8; --line: #DDD8EE;
  --ink: #17142B; --muted: #5A5575; --primary: #5B3DF5; --danger: #C0273D;
  --radius: 24px 24px 24px 6px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 500 16px/1.65 "Figtree", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); }
.wrap { max-width: 800px; margin: 0 auto; padding: 0 24px; }
header { padding: 20px 0; border-bottom: 1px solid var(--line); background: var(--surface); }
header .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 800 1.25rem "Bricolage Grotesque", "Figtree", sans-serif; }
.logo svg { width: 32px; height: 32px; }
header a.back { font-weight: 700; font-size: .9375rem; text-decoration: none; }
main { padding: 48px 0 72px; }
h1 { margin: 0 0 8px; font: 800 clamp(2rem, 5vw, 2.75rem)/1.1 "Bricolage Grotesque", "Figtree", sans-serif; letter-spacing: -.02em; }
h2 { margin: 40px 0 10px; font: 700 1.5rem/1.25 "Bricolage Grotesque", "Figtree", sans-serif; letter-spacing: -.01em; }
h3 { margin: 24px 0 6px; font: 800 1.0625rem/1.3 "Figtree", sans-serif; }
p, ul, ol { margin: 0 0 14px; }
ul, ol { padding-left: 1.4em; }
li { margin-bottom: 6px; }
.meta { color: var(--muted); font-weight: 600; margin-bottom: 28px; }
.summary { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px; margin: 24px 0; }
.summary p:last-child, .summary ul:last-child { margin-bottom: 0; }
.callout { border-left: 4px solid var(--danger); background: var(--surface); border-radius: 4px 14px 14px 4px; padding: 16px 20px; margin: 16px 0; }
.toc { background: var(--raised); border-radius: var(--radius); padding: 16px 24px; margin: 24px 0; }
.toc ol { margin: 0; columns: 2; column-gap: 32px; }
.toc a { text-decoration: none; font-weight: 600; }
table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); margin: 12px 0 20px; font-size: .9375rem; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { background: var(--raised); font-weight: 800; }
footer { padding: 32px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9375rem; font-weight: 600; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--primary); text-decoration: underline; }
:focus-visible { outline: 3px solid rgba(91,61,245,.4); outline-offset: 2px; }
@media (max-width: 600px) { .toc ol { columns: 1; } th, td { padding: 8px; } table { font-size: .875rem; } }