:root {
  color-scheme: dark;
  --paper: #0e0e0d;
  --surface: #0e0e0d;
  --ink: #f2f2ed;
  --muted: #9b9b94;
  --line: rgb(242 242 237 / 17%);
  --accent: #f2f2ed;
  font-family: "Instrument Sans", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--paper); scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
}

a { color: inherit; text-decoration-color: rgb(244 241 232 / 32%); text-underline-offset: 4px; }
a:hover { text-decoration-color: var(--accent); }


.guide {
  display: grid;
  width: min(1120px, calc(100% - 40px));
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: clamp(48px, 8vw, 110px);
  margin: 0 auto;
  padding: 90px 0 120px;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1, h2 { font-family: "Instrument Sans", sans-serif; letter-spacing: -0.045em; }
h1 { max-width: 850px; margin: 0; font-size: clamp(48px, 7vw, 82px); font-weight: 650; line-height: 0.94; }
h1 em { font-weight: 450; font-style: normal; }
h2 { margin: 82px 0 18px; font-size: clamp(30px, 4vw, 44px); font-weight: 550; line-height: 1.05; }
h3 { margin: 38px 0 10px; font-size: 18px; letter-spacing: -0.02em; }

.lede { max-width: 720px; margin: 32px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 22px); line-height: 1.55; }
.prose { min-width: 0; max-width: 760px; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--ink); font-weight: 600; }

pre {
  width: 100%;
  max-width: 100%;
  margin: 24px 0;
  padding: 24px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  font: 14px/1.7 "Courier New", monospace;
}

code { font-family: "Courier New", monospace; }
p code, li code { color: var(--ink); font-size: 0.92em; }

.callout {
  margin: 32px 0;
  padding: 22px 24px;
  border-left: 1px solid var(--accent);
  background: transparent;
  color: var(--muted);
}

.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 28px 0; }
.card { min-height: 150px; padding: 22px; border: 1px solid var(--line); border-radius: 0; background: transparent; }
.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; font-size: 14px; }

.toc { position: sticky; top: 30px; align-self: start; padding-top: 8px; }
.toc b { display: block; margin-bottom: 14px; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.toc a { display: block; padding: 6px 0; color: var(--muted); font-size: 13px; text-decoration: none; }
.toc a:hover { color: var(--ink); }

.next-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 78px; }
.next-links a { padding: 20px; border: 1px solid var(--line); border-radius: 0; text-decoration: none; }
.next-links small { display: block; margin-bottom: 6px; color: var(--muted); }

footer {
  display: flex;
  width: min(1120px, calc(100% - 40px));
  min-height: 110px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-links { display: flex; gap: 18px; }

@media (max-width: 760px) {
  .guide { grid-template-columns: 1fr; padding-top: 60px; }
  .toc { display: none; }
  .card-grid, .next-links { grid-template-columns: 1fr; }
  h1 { font-size: clamp(42px, 12.5vw, 58px); }
  h2 { margin-top: 62px; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; }
}

.site-header { width: min(1160px, calc(100% - 96px)); margin: 0 auto; }
:root.light { --paper: #f2f1ec; --surface: #fafaf6; --ink: #181815; --muted: #626359; --line: rgb(24 24 21 / 18%); --accent: #181815; color-scheme: light; }
@media (max-width: 760px) { .site-header { width: calc(100% - 40px); } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }