/* Plain Method — shared stylesheet. No web fonts, no external requests. */

:root {
  --steel: #2a5673;
  --steel-dark: #1d3d53;
  --oat: #f3eee2;
  --paper: #fdfcf9;
  --charcoal: #22262a;
  --charcoal-soft: #474d53;
  --rule: #d8d2c4;
  --radius: 8px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--charcoal);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.72;
}

/* ---------- Skip link ---------- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--charcoal);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 50;
  font-family: var(--sans);
}
.skip:focus { left: 0; }

/* ---------- Header ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--oat);
  border-bottom: 1px solid var(--rule);
}
.bar {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.55rem 1.1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--charcoal);
  text-decoration: none;
  margin-right: auto;
}
.wordmark:hover { color: var(--steel-dark); }

.menu-toggle {
  font-family: var(--sans);
  font-size: 0.9rem;
  background: var(--paper);
  color: var(--charcoal);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.35rem 0.8rem;
  cursor: pointer;
}
.menu-toggle:hover { background: #fff; }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
}
.site-nav a {
  font-family: var(--sans);
  font-size: 0.93rem;
  color: var(--charcoal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover { border-bottom-color: var(--steel); color: var(--steel-dark); }

@media (max-width: 620px) {
  .menu-toggle { display: inline-block; }
  .site-nav { flex-basis: 100%; display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0.1rem; padding: 0.4rem 0 0.2rem; }
  .site-nav a { display: block; padding: 0.45rem 0; }
}
@media (min-width: 621px) {
  .menu-toggle { display: none; }
  .site-nav { display: block !important; }
}

/* ---------- Layout ---------- */
main { display: block; }

.column {
  max-width: 660px;
  margin: 0 auto;
  padding: 2.2rem 1.1rem 3rem;
}

.wide { max-width: 760px; }

h1, h2, h3, h4 {
  font-family: var(--sans);
  line-height: 1.25;
  color: var(--charcoal);
  margin: 2.1rem 0 0.7rem;
}
h1 { font-size: 1.85rem; margin-top: 0.4rem; letter-spacing: -0.01em; }
h2 { font-size: 1.3rem; margin-top: 2.5rem; }
h3 { font-size: 1.07rem; margin-top: 1.8rem; }
h4 { font-size: 0.98rem; margin-top: 1.4rem; }

p { margin: 0 0 1.05rem; }

a { color: var(--steel-dark); }
a:hover { color: var(--steel); }

:focus-visible {
  outline: 3px solid var(--steel);
  outline-offset: 2px;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.4rem 0;
}

/* ---------- Step indicator ---------- */
.step-mark {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--charcoal-soft);
  margin: 0 0 0.5rem;
}

@media (min-width: 1040px) {
  .step-mark {
    position: absolute;
    left: calc(50% - 480px);
    width: 140px;
    text-align: right;
    margin-top: 0.5rem;
  }
  .has-rail { position: relative; }
}

/* ---------- Disclosure box ---------- */
.disclosure {
  border: 1px solid var(--rule);
  border-left: 5px solid var(--steel);
  border-radius: var(--radius);
  background: var(--oat);
  padding: 1rem 1.1rem;
  margin: 1.6rem 0;
}
.disclosure p { margin-bottom: 0.6rem; }
.disclosure p:last-child { margin-bottom: 0; }

.link-note {
  font-size: 0.93rem;
  color: var(--charcoal-soft);
  margin-top: -0.6rem;
}

/* ---------- Callouts, checklists, examples ---------- */
.callout, .checklist, .example, .summary-box {
  border: 1px solid var(--rule);
  border-left: 5px solid var(--steel);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 1.7rem 0;
  background: #fff;
}
.example { border-left-color: var(--charcoal-soft); background: var(--oat); }
.summary-box { border-left-color: var(--charcoal-soft); }

.callout h3, .checklist h2, .checklist h3, .example h3, .summary-box h3 { margin-top: 0.2rem; }

.checklist ul { list-style: none; padding-left: 0; margin: 0.6rem 0 0; }
.checklist li {
  position: relative;
  padding-left: 2.1rem;
  margin-bottom: 0.75rem;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 1.05rem;
  height: 1.05rem;
  border: 1.5px solid var(--charcoal-soft);
  border-radius: 3px;
  background: var(--paper);
}

ol.procedure { padding-left: 1.3rem; }
ol.procedure li { margin-bottom: 0.8rem; }

ul.plain { padding-left: 1.2rem; }
ul.plain li { margin-bottom: 0.5rem; }

.timeline { list-style: none; padding-left: 0; margin: 1.4rem 0; }
.timeline li {
  border-left: 3px solid var(--rule);
  padding: 0 0 0.9rem 1.1rem;
  margin: 0;
}
.timeline li b { font-family: var(--sans); font-size: 0.92rem; display: block; }

.glossary {
  background: var(--oat);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 1.7rem 0;
}
.glossary dt { font-family: var(--sans); font-weight: 600; font-size: 0.95rem; margin-top: 0.7rem; }
.glossary dd { margin: 0.15rem 0 0; }

dl.checked dt { font-family: var(--sans); font-weight: 600; font-size: 0.95rem; margin-top: 0.9rem; }
dl.checked dd { margin: 0.15rem 0 0; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
  font-size: 0.97rem;
}
caption { text-align: left; font-family: var(--sans); font-size: 0.9rem; color: var(--charcoal-soft); margin-bottom: 0.4rem; }
th, td { border: 1px solid var(--rule); padding: 0.55rem 0.65rem; text-align: left; vertical-align: top; }
th { background: var(--oat); font-family: var(--sans); font-size: 0.92rem; }

.contents {
  background: var(--oat);
  border-radius: var(--radius);
  padding: 0.9rem 1.2rem;
  margin: 1.5rem 0 2rem;
}
.contents h2 { font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.09em; margin: 0 0 0.5rem; }
.contents ol { margin: 0; padding-left: 1.2rem; }
.contents li { margin-bottom: 0.3rem; }

.steps-list { padding-left: 1.3rem; }
.steps-list li { margin-bottom: 0.9rem; }
.steps-list a { font-family: var(--sans); font-weight: 600; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  margin-top: 2.6rem;
  padding-top: 1.1rem;
  font-family: var(--sans);
  font-size: 0.94rem;
}

.print-btn {
  font-family: var(--sans);
  font-size: 0.93rem;
  background: var(--steel);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  padding: 0.55rem 1.1rem;
  cursor: pointer;
}
.print-btn:hover { background: var(--steel-dark); }

figure.diagram { margin: 1.8rem 0; }
figure.diagram svg { max-width: 100%; height: auto; }
figure.diagram figcaption { font-family: var(--sans); font-size: 0.88rem; color: var(--charcoal-soft); }

/* ---------- Footer ---------- */
.site-foot {
  border-top: 1px solid var(--rule);
  background: var(--oat);
  margin-top: 3rem;
}
.foot-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.8rem 1.1rem 2.4rem;
  font-family: var(--sans);
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--charcoal);
}
.foot-inner p { margin: 0 0 0.9rem; }
.foot-inner .pub { line-height: 1.55; }
.foot-links a { margin-right: 0.15rem; }
.tm { color: var(--charcoal-soft); }
.rev { color: var(--charcoal-soft); margin-bottom: 0; }

/* ---------- Print ---------- */
@media print {
  .site-head, .site-foot, .pager, .print-btn, .skip, .contents { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .column { max-width: 100%; padding: 0; }
  .checklist, .callout, .example, .summary-box, .disclosure {
    border: 1px solid #999;
    border-left-width: 3px;
    break-inside: avoid;
    page-break-inside: avoid;
    background: #fff;
  }
  .checklist li::before { border-color: #000; }
  h2 { break-after: avoid; page-break-after: avoid; }
  a { color: #000; text-decoration: none; }
}