:root {
  --ink-50: #f6f6f4;
  --ink-100: #ececea;
  --ink-200: #dededa;
  --ink-400: #969590;
  --ink-500: #6f6e69;
  --ink-600: #565550;
  --ink-700: #3d3c38;
  --ink-900: #1c1b1f;
  --ink-950: #111014;
  --brand-50: #f3f1ff;
  --brand-100: #e5e0ff;
  --brand-600: #6758da;
  --brand-700: #5749bf;
  --canvas: #f7f7f5;
  --edge: 1px solid var(--ink-200);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink-700);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand-700); text-underline-offset: 3px; }
a:hover { color: var(--brand-600); }
img { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--brand-600); outline-offset: 3px; border-radius: 4px; }
.skip {
  position: absolute;
  left: 16px;
  top: -64px;
  z-index: 20;
  padding: 9px 14px;
  border-radius: 8px;
  background: var(--ink-950);
  color: #fff;
}
.skip:focus { top: 12px; }
.wrap { width: min(100% - 40px, 1120px); margin-inline: auto; }
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: var(--edge);
  background: rgb(247 247 245 / 0.92);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 20px; }
.logo { margin-right: auto; }
.logo img { width: auto; height: 36px; max-width: none; }
.header-nav { display: flex; align-items: center; gap: 8px; }
.header-nav a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--ink-700);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}
.header-nav a:hover { background: var(--ink-100); color: var(--ink-950); }
.header-nav .primary { background: var(--ink-900); color: #fff; }
.header-nav .primary:hover { background: var(--ink-700); color: #fff; }
.hero { padding: clamp(64px, 10vw, 112px) 0 clamp(40px, 6vw, 64px); }
.eyebrow {
  margin: 0 0 14px;
  color: var(--brand-700);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1 {
  max-width: 820px;
  margin: 0;
  color: var(--ink-950);
  font-size: clamp(2.35rem, 6vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}
.intro { max-width: 750px; margin: 24px 0 0; color: var(--ink-600); font-size: 1.08rem; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; color: var(--ink-500); font-size: 0.82rem; }
.layout { display: grid; grid-template-columns: 230px minmax(0, 760px); gap: clamp(36px, 7vw, 88px); align-items: start; padding-bottom: 96px; }
.layout > * { min-width: 0; }
.toc {
  position: sticky;
  top: 96px;
  padding: 20px;
  border: var(--edge);
  border-radius: 14px;
  background: #fff;
}
.toc h2 { margin: 0 0 10px; color: var(--ink-950); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }
.toc ol { margin: 0; padding: 0; list-style: none; }
.toc li + li { margin-top: 5px; }
.toc a { color: var(--ink-600); font-size: 0.82rem; text-decoration: none; }
.toc a:hover { color: var(--ink-950); text-decoration: underline; }
.prose section { scroll-margin-top: 92px; }
.prose section + section { margin-top: 52px; padding-top: 52px; border-top: var(--edge); }
.prose h2 { margin: 0 0 16px; color: var(--ink-950); font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.2; letter-spacing: -0.025em; }
.prose h3 { margin: 28px 0 10px; color: var(--ink-900); font-size: 1.05rem; }
.prose p { margin: 0; }
.prose p + p { margin-top: 16px; }
.prose ul, .prose ol { margin: 16px 0 0; padding-left: 22px; }
.prose li + li { margin-top: 8px; }
.callout {
  margin: 24px 0;
  padding: 18px 20px;
  border: 1px solid var(--brand-100);
  border-radius: 12px;
  background: var(--brand-50);
  color: var(--ink-700);
}
.table-wrap { margin-top: 22px; overflow-x: auto; border: var(--edge); border-radius: 14px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 620px; font-size: 0.9rem; }
th, td { padding: 15px 16px; border-bottom: var(--edge); text-align: left; vertical-align: top; }
th { color: var(--ink-950); background: var(--ink-50); font-size: 0.78rem; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: 0; }
.footer { padding: 44px 0; background: var(--ink-950); color: var(--ink-400); }
.footer-inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; }
.footer-logo { width: auto; height: 38px; }
.footer p { max-width: 620px; margin: 14px 0 0; font-size: 0.78rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 20px; }
.footer a { color: var(--ink-200); font-size: 0.82rem; }

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .footer-inner { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .logo img { height: 34px; }
  .header-nav a:not(.primary) { display: none; }
  .hero { padding-top: 52px; }
  .toc { padding: 16px; }
}

@media print {
  .header, .toc, .footer, .skip { display: none; }
  body { background: #fff; color: #222; font-size: 11pt; }
  .hero { padding: 0 0 30px; }
  .layout { display: block; padding: 0; }
  .prose section + section { break-before: auto; }
}