:root {
  --paper: #f7f4ee; --card: #fffdf8; --ink: #1f2a44; --ink2: #4a5368; --line: #e3dccd;
  --gold: #b07d1e; --pen: #b3402c; --ok: #2f6b45; --focus: #2457c5;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Charter, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --r: 12px; --max: 1080px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); }
img, svg { max-width: 100%; height: auto; }
a { color: var(--ink); text-decoration-color: var(--gold); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.3rem); margin: 0 0 .5em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); margin: 0 0 .6em; }
h3 { font-size: 1.2rem; margin: 1.4em 0 .4em; }
p { margin: 0 0 1em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.cta-box :focus-visible { outline-color: #fff; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 720px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--ink2); }
.small { font-size: .9rem; }
.k { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink2); margin: 0 0 .3em; font-weight: 600; }

/* top bar */
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; max-width: var(--max); margin: 0 auto; padding: 14px 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--serif); font-size: 1.3rem; font-weight: 600; }
.nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.nav a { text-decoration: none; font-size: .95rem; }

/* buttons */
.primary, .ghost { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 18px;
  border-radius: 999px; font: 600 1rem/1.2 var(--sans); cursor: pointer; text-decoration: none; border: 2px solid var(--ink); }
.primary { background: var(--ink); color: #fff; }
.primary:hover { background: #2c3b60; }
.primary[disabled] { opacity: .55; cursor: not-allowed; }
.ghost { background: transparent; color: var(--ink); }
.ghost:hover { background: #ece6d8; }

/* footer */
.foot { border-top: 1px solid var(--line); margin-top: 64px; padding: 28px 20px 40px; text-align: center; color: var(--ink2); font-size: .9rem; }
.foot p { max-width: 760px; margin: 0 auto .4em; }

/* article pages */
.doc-page { padding: 24px 0 8px; }
.doc-page h2 { margin-top: 1.6em; }
.doc-page table { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: .95rem; background: var(--card); }
.doc-page th, .doc-page td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc-page th { background: #efe9dc; }
.table-wrap { overflow-x: auto; }
.callout { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--gold); border-radius: 8px; padding: 14px 16px; margin: 0 0 1.2em; }
.cta-box { background: var(--ink); color: #fff; border-radius: var(--r); padding: 24px; margin: 2em 0; }
.cta-box h2 { color: #fff; margin-top: 0; }
.cta-box .primary { background: #fff; color: var(--ink); border-color: #fff; }
.crumbs { font-size: .88rem; color: var(--ink2); margin: 8px 0 18px; }
.sample { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; margin: 0 0 1em; font-family: var(--serif); font-size: 1.05rem; }
del { color: var(--pen); text-decoration-thickness: 2px; }
ins { color: var(--ok); text-decoration: none; font-weight: 600; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .nav { gap: 12px; }
  .nav .hide-s { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }