:root {
  --bg: #fbf8f2;
  --surface: #ffffff;
  --ink: #1b1813;
  --muted: #6e665b;
  --line: rgba(27, 24, 19, 0.12);
  --primary: #f1543b;
  --primary-deep: #c8402a;
  --blush: #fdf0ea;
  --ink-soft: #2c271f;
  --font-disp: "Bricolage Grotesque", system-ui, sans-serif;
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.68;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); font-weight: 600; text-underline-offset: 3px; }
a:hover { color: var(--primary-deep); }
.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(251, 248, 242, 0.94);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 20;
}
.topbar-in {
  max-width: 1100px; margin: 0 auto; padding: 12px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topbar-in img { height: 36px; width: auto; display: block; }
.topbar-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 0.88rem; }
.topbar-nav a { color: var(--ink); text-decoration: none; font-weight: 600; }
.topbar-nav a:hover, .topbar-nav a[aria-current="page"] { color: var(--primary); }
.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 22px 100px;
  display: grid;
  gap: 36px;
}
@media (min-width: 920px) {
  .layout { grid-template-columns: 220px minmax(0, 1fr); align-items: start; }
}
.toc {
  font-size: 0.84rem;
}
@media (min-width: 920px) {
  .toc { position: sticky; top: 78px; }
}
.toc h2 {
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}
.toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
.toc a { color: var(--muted); text-decoration: none; font-weight: 550; font-weight: 600; }
.toc a:hover { color: var(--ink); }
.doc header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
  margin-bottom: 28px;
}
h1 {
  font-family: var(--font-disp);
  font-size: clamp(2rem, 5vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
  line-height: 1.08;
}
.sub { margin: 0; color: var(--muted); font-size: 0.92rem; }
h2 {
  font-family: var(--font-disp);
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 42px 0 12px;
  scroll-margin-top: 84px;
}
h3 { font-size: 1.02rem; margin: 22px 0 8px; font-weight: 700; color: var(--ink); }
p, li { color: var(--muted); }
p { margin: 0 0 14px; }
strong { color: var(--ink); font-weight: 700; }
ul, ol { padding-left: 1.25rem; margin: 0 0 14px; }
li { margin: 7px 0; }
.callout {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  margin: 20px 0 22px;
  box-shadow: 0 10px 28px -20px rgba(27, 24, 19, 0.35);
}
.callout--alert {
  background: var(--blush);
  border-color: color-mix(in srgb, var(--primary) 28%, var(--line));
}
.callout--ink {
  background: var(--ink-soft);
  color: #fbf8f1;
}
.callout--ink p, .callout--ink li, .callout--ink strong { color: #fbf8f1; }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
footer.doc {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}
footer.doc nav { display: flex; flex-wrap: wrap; gap: 10px 20px; }
@media print {
  .topbar, .toc { display: none; }
  .layout { display: block; padding: 0; }
  a { color: inherit; }
}