:root {
  --ink: #1a1f2b;
  --ink-soft: #3a4255;
  --paper: #f8f6f1;
  --paper-warm: #efece3;
  --line: #d8d2c2;
  --accent: #2e5d86;
  --accent-soft: #e3ecf4;
  --glass: #cfe3ec;
  --max: 68rem;
  --max-prose: 42rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Iowan Old Style", "Charter", "Georgia", serif;
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: .5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- header + nav ---------- */

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 0;
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  letter-spacing: .04em;
  padding: .35rem .55rem;
  border-radius: 2px;
  font-size: .85rem;
}
.brand-name {
  font-family: "Iowan Old Style", "Charter", Georgia, serif;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.brand-sub {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .8rem;
  color: var(--ink-soft);
  letter-spacing: .08em;
}

.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .95rem;
}
.primary-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: .2rem 0;
  border-bottom: 2px solid transparent;
}
.primary-nav a:hover { color: var(--accent); }
.primary-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* ---------- main ---------- */

main {
  padding: 3rem 0 4rem;
}

main > .wrap > * { max-width: var(--max-prose); }
main > .wrap > .full { max-width: none; }

h1, h2, h3, h4 {
  font-family: "Iowan Old Style", "Charter", Georgia, serif;
  line-height: 1.2;
  color: var(--ink);
}

h1 {
  font-size: 2.4rem;
  margin: 0 0 .5rem;
  letter-spacing: -.01em;
}
.page-kicker {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .85rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .4rem;
}
.page-lead {
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: 0 0 2rem;
}

h2 { font-size: 1.5rem; margin: 2.2rem 0 .6rem; }
h3 { font-size: 1.15rem; margin: 1.6rem 0 .4rem; font-weight: 700; }

p, ul, ol { margin: 0 0 1.1rem; }

ul, ol { padding-left: 1.3rem; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.5rem 0;
  padding: .2rem 0 .2rem 1.2rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* ---------- callouts ---------- */

.callout {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.8rem 0;
  font-size: .97rem;
}
.callout p:last-child { margin-bottom: 0; }
.callout h3 {
  margin-top: 0;
  font-size: .85rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.archive-banner {
  background: var(--paper-warm);
  border: 1px solid var(--line);
  padding: .85rem 1.1rem;
  margin: 0 0 2.2rem;
  font-size: .95rem;
  color: var(--ink-soft);
  border-radius: 3px;
}
.archive-banner strong { color: var(--ink); }

/* ---------- factbox / article meta ---------- */

.factbox {
  background: #fff;
  border: 1px solid var(--line);
  padding: 1.1rem 1.3rem;
  margin: 1.8rem 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .93rem;
}
.factbox h3 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 .6rem;
}
.factbox dl { margin: 0; }
.factbox dt { font-weight: 700; color: var(--ink); display: inline; }
.factbox dt::after { content: ": "; }
.factbox dd { display: inline; margin: 0; }
.factbox dd::after { content: "\A"; white-space: pre; }

.article-meta {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .88rem;
  color: var(--ink-soft);
  margin: 0 0 1.8rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--line);
}

/* ---------- grids ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 1.2rem 1.3rem;
  border-radius: 3px;
}
.card h3 { margin-top: 0; font-size: 1.05rem; }
.card p { font-size: .95rem; color: var(--ink-soft); margin-bottom: .6rem; }
.card a.more {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .85rem;
  letter-spacing: .02em;
  text-decoration: none;
}
.card a.more:hover { text-decoration: underline; }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  font-size: .96rem;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: .5rem .6rem;
  border-bottom: 1px solid var(--line);
}
.spec-table th {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper-warm);
}

/* ---------- hero (homepage) ---------- */

.hero {
  background: linear-gradient(135deg, var(--glass) 0%, var(--accent-soft) 100%);
  border-bottom: 1px solid var(--line);
  padding: 3.5rem 0 3rem;
  margin-bottom: 2rem;
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.hero .page-kicker { color: var(--accent); }
.hero h1 { font-size: 2.7rem; margin-top: .2rem; }
.hero .page-lead { font-size: 1.25rem; margin-bottom: 0; max-width: 38rem; }

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

.site-footer {
  background: var(--ink);
  color: #cfd3dc;
  margin-top: 4rem;
  font-size: .93rem;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 2rem;
  padding-top: 3rem;
  padding-bottom: 2rem;
}
.site-footer h2 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #fff;
  margin: 0 0 .8rem;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: .2rem 0; }
.site-footer a { color: #cfd3dc; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid #2c3345;
  padding: 1.2rem 0;
  font-size: .85rem;
  color: #8e94a4;
}
.footer-bottom a { color: #b9c0cf; }

/* ---------- 404 ---------- */
.error-page {
  text-align: center;
  padding: 3rem 1rem;
}
.error-page h1 { font-size: 3.5rem; margin-bottom: .5rem; }
.error-page .page-lead { max-width: 34rem; margin-left: auto; margin-right: auto; }

/* ---------- responsive ---------- */

@media (max-width: 36rem) {
  body { font-size: 17px; }
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.1rem; }
  .hero { padding: 2.5rem 0 2rem; }
  .site-header .wrap { gap: .8rem; }
  .primary-nav ul { gap: .2rem .9rem; font-size: .9rem; }
}