.guide-index,
.guide-article {
  padding-block: 55px 40px;
}
.guide-intro {
  margin-bottom: 64px;
}
.guide-intro h1,
.article-heading h1 {
  font-size: clamp(2.5rem, 4.8vw, 4.5rem);
  line-height: 1.08;
  max-width: 19ch;
  margin-bottom: 24px;
}
.guide-intro > p:first-of-type,
.article-lead {
  font-size: 1.3rem;
}
.guide-intro > p:last-child {
  color: var(--muted);
}
.guide-feature {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 70px;
  border-block: 1px solid var(--line);
  padding-block: 48px;
}
.guide-feature h2 {
  font-size: clamp(2rem, 3.2vw, 3rem);
  margin-bottom: 24px;
}
.guide-feature h2 a {
  text-decoration: none;
}
.guide-feature h2 a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}
.guide-meta {
  color: var(--muted);
  font-size: 0.875rem;
}
.ten-frame-example {
  background: var(--mint);
  padding: 40px 28px;
  margin: 0;
  border-radius: var(--radius);
}
.ten-frame {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
  max-width: 460px;
  margin-inline: auto;
}
.ten-frame > span {
  aspect-ratio: 1;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  display: grid;
  place-items: center;
}
.ten-frame .filled::after {
  content: "";
  width: 65%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--primary);
}
.ten-frame-example figcaption {
  margin-top: 24px;
  text-align: center;
  font-size: 0.875rem;
}
.ten-frame-example strong {
  display: block;
  font-family: Bricolage, system-ui, sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.guide-note {
  padding-top: 40px;
  color: var(--muted);
}
.guide-article {
  max-width: 900px;
}
.guide-breadcrumb {
  font-size: 0.875rem;
  margin-bottom: 36px;
}
.guide-breadcrumb a {
  display: inline-block;
  padding-block: 12px;
}
.article-heading {
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line);
}
.article-body {
  max-width: 680px;
  margin-inline: auto;
}
.article-body h2 {
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  margin: 48px 0 20px;
  line-height: 1.2;
}
.article-body p,
.article-body li {
  line-height: 1.8;
}
.activity-steps {
  padding-left: 26px;
}
.activity-steps li {
  padding-left: 8px;
  margin-bottom: 24px;
}
.article-body .ten-frame-example {
  margin-block: 32px;
}
.print-invitation {
  background: var(--mint);
  border-radius: var(--radius);
  padding: 30px;
  margin-block: 48px;
}
.print-invitation h2 {
  margin-top: 0;
}
.article-sources,
.article-close {
  border-top: 1px solid var(--line);
}
.article-sources {
  font-size: 0.9375rem;
  color: var(--muted);
  padding-bottom: 24px;
}
.article-sources h2 {
  color: var(--ink);
}
.article-sources li {
  margin-bottom: 16px;
}
.guides .footer {
  border-top: 1px solid var(--line);
}
.worksheet {
  color-scheme: light;
  --bg: #fff;
  --ink: #23493f;
  --muted: #52665d;
  --primary: #255b4a;
  --on-primary: #fffdf6;
  --focus: #aa5c23;
}
.print-controls,
.print-sheet {
  max-width: 740px;
  padding-block: 24px;
}
.print-controls p {
  font-size: 0.875rem;
  margin-top: 16px;
}
.print-sheet h1 {
  font-size: 2.5rem;
  margin-block: 28px 16px;
}
.print-sheet h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.blank-frame {
  max-width: none;
  margin-block: 30px;
}
.number-pair {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  text-align: center;
  margin-block: 28px;
}
.print-sheet footer {
  font-size: 0.75rem;
  margin-top: 30px;
}
@media (max-width: 760px) {
  .guide-index,
  .guide-article {
    padding-top: 32px;
  }
  .guide-intro {
    margin-bottom: 40px;
  }
  .guide-feature {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-block: 32px;
  }
  .ten-frame-example {
    padding: 28px 20px;
  }
  .article-lead,
  .guide-intro > p:first-of-type {
    font-size: 1.125rem;
  }
  .print-invitation {
    padding: 24px;
  }
}
@media print {
  @page {
    margin: 16mm;
  }
  .worksheet {
    --ink: #000;
    color: #000;
    font-size: 12pt;
  }
  .print-controls,
  .worksheet > .skip-link {
    display: none;
  }
  .print-sheet {
    width: 100%;
    max-width: none;
    padding: 0;
  }
  .print-sheet .brand-period {
    color: inherit;
  }
  .print-sheet h1 {
    margin-top: 20px;
  }
  .blank-frame {
    max-width: 160mm;
  }
  .print-sheet footer {
    font-size: 9pt;
  }
}