/* Blank Index — shared stylesheet.
   No web fonts, no external requests. System stacks only. */

:root {
  --steel: #2f5068;
  --steel-deep: #1f3648;
  --charcoal: #22262a;
  --charcoal-soft: #3f464d;
  --oat: #f4efe4;
  --oat-deep: #e7dfcd;
  --paper: #fcfaf5;
  --rule: #cfc6b2;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --col: 660px;
}

* { 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: 18px;
  line-height: 1.72;
}

/* ---------- skip link ---------- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--charcoal);
  color: #fff;
  padding: 10px 16px;
  font-family: var(--sans);
  font-size: 15px;
  z-index: 50;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--oat);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--sans);
}

.wordmark {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--charcoal);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.wordmark .mark {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--steel);
  color: #fff;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.04em;
}

.menu-button {
  margin-left: auto;
  font-family: var(--sans);
  font-size: 15px;
  background: var(--paper);
  color: var(--charcoal);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 20px;
}
.site-nav a {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--charcoal-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--steel);
  border-bottom-color: var(--steel);
}

@media (max-width: 719px) {
  .menu-button { display: block; }
  .site-nav {
    display: none;
    width: 100%;
    order: 3;
  }
  .site-nav.open { display: block; }
  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 6px 0 10px;
  }
  .site-nav li { border-top: 1px solid var(--rule); }
  .site-nav a { display: block; padding: 11px 2px; }
  .header-inner { flex-wrap: wrap; }
}
@media (min-width: 720px) {
  .menu-button { display: none; }
  .site-nav { display: block !important; margin-left: auto; }
}

/* ---------- layout ---------- */

main { display: block; }

.wrap {
  max-width: var(--col);
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  background: var(--oat);
  border-bottom: 1px solid var(--rule);
  padding: 44px 0 38px;
}

h1 {
  font-family: var(--sans);
  font-size: 32px;
  line-height: 1.25;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

h2 {
  font-family: var(--sans);
  font-size: 23px;
  line-height: 1.3;
  margin: 42px 0 12px;
}

h3 {
  font-family: var(--sans);
  font-size: 18px;
  margin: 28px 0 8px;
}

p { margin: 0 0 18px; }

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

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

.lede { font-size: 19px; }

.meta {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--charcoal-soft);
  margin: 0 0 10px;
}

.step-indicator {
  display: inline-block;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: var(--steel);
  border-radius: 8px;
  padding: 4px 10px;
  margin-bottom: 14px;
}

/* step numbers in the margin on wide screens */
.marginal {
  position: relative;
}
@media (min-width: 1100px) {
  .marginal::before {
    content: attr(data-step);
    position: absolute;
    left: -108px;
    top: 2px;
    width: 86px;
    text-align: right;
    font-family: var(--sans);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--charcoal-soft);
  }
}

/* ---------- units ---------- */

.disclosure,
.callout,
.checklist,
.example,
.proscons,
.glossary,
.summary,
.timeline {
  border-left: 4px solid var(--steel);
  background: var(--oat);
  border-radius: 8px;
  padding: 18px 20px;
  margin: 26px 0;
}

.disclosure { background: #eef2f5; border-left-color: var(--charcoal); }
.callout { background: #eef2f5; }
.checklist { background: var(--paper); border: 1px solid var(--rule); border-left: 4px solid var(--steel); }
.example { border-left-color: var(--charcoal-soft); }
.summary { border-left-color: var(--charcoal-soft); background: var(--oat-deep); }

.unit-label {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--charcoal-soft);
  margin: 0 0 8px;
}

.disclosure p:last-child,
.callout p:last-child,
.example p:last-child,
.summary p:last-child { margin-bottom: 0; }

/* printed boxes — static, no state */
.boxes { list-style: none; margin: 0; padding: 0; }
.boxes li {
  position: relative;
  padding-left: 32px;
  margin: 0 0 12px;
}
.boxes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border: 1.5px solid var(--charcoal-soft);
  border-radius: 3px;
  background: #fff;
}

ol.procedure { padding-left: 22px; }
ol.procedure li { margin-bottom: 14px; }

ul.plain { padding-left: 22px; }
ul.plain li { margin-bottom: 10px; }

.contents {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 26px 0;
  background: var(--paper);
}
.contents ol { margin: 0; padding-left: 20px; }
.contents li { margin-bottom: 6px; }
.contents .unit-label { margin-bottom: 6px; }

.steplist { padding-left: 22px; }
.steplist li { margin-bottom: 14px; }

.aff-note {
  display: block;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--charcoal-soft);
  margin-top: 4px;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 24px 0;
  font-size: 16px;
}
caption {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--charcoal-soft);
  text-align: left;
  padding-bottom: 8px;
}
th, td {
  border: 1px solid var(--rule);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--oat); font-family: var(--sans); font-size: 15px; }

dl.checked { margin: 0; }
dl.checked dt {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 16px;
  margin-top: 16px;
}
dl.checked dd { margin: 4px 0 0; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--rule);
  margin-top: 46px;
  padding-top: 18px;
  font-family: var(--sans);
  font-size: 15px;
}

.print-button {
  font-family: var(--sans);
  font-size: 15px;
  background: var(--steel);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
}

figure.diagram { margin: 26px 0; }
figure.diagram svg { max-width: 100%; height: auto; display: block; }
figcaption {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--charcoal-soft);
  margin-top: 8px;
}

main > .wrap { padding-bottom: 50px; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  background: var(--oat);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.65;
  color: var(--charcoal);
}
.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 26px 20px 34px;
}
.footer-inner address {
  font-style: normal;
  margin: 0 0 12px;
}
.footer-links { margin: 0 0 12px; }
.footer-links a { margin-right: 4px; }
.footer-notice { margin: 0 0 10px; max-width: 70ch; }
.footer-reviewed { margin: 0; color: var(--charcoal-soft); }
.footer-name { font-weight: 700; }

/* ---------- print ---------- */

@media print {
  .site-header, .pager, .print-button, .skip { display: none !important; }
  body { background: #fff; font-size: 12pt; line-height: 1.5; }
  .wrap { max-width: none; padding: 0; }
  .checklist {
    break-inside: avoid;
    page-break-inside: avoid;
    border: 1px solid #000;
    border-left: 3px solid #000;
    background: #fff;
    margin: 14pt 0;
  }
  .boxes li::before { border-color: #000; }
  .disclosure, .callout, .summary { background: #fff; border-left-color: #000; }
  a { color: #000; text-decoration: underline; }
  .site-footer { background: #fff; font-size: 9pt; }
  h1 { font-size: 20pt; }
  h2 { font-size: 14pt; page-break-after: avoid; }
}