/* Learner's guide. Definition lists, not cards — this is a reference surface
   and it should read like one. */

.guide-head { margin: 18px 0 10px; }
.guide-head h1 { font-size: var(--fs-title); }
.guide-head .sub { max-width: 62ch; margin: 10px 0 18px; font-size: var(--fs-md); line-height: 1.6; color: var(--muted-foreground); }
/* Wraps: the search box asks for 260px and the counter beside it does not
   wrap, so on a 320px screen the row ran off the side in every theme. */
.guide-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.guide-tools input {
  flex: 1 1 260px;
  max-width: 340px;
  padding: 8px 12px;
  border: var(--hairline) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--foreground);
  font: inherit;
  font-size: var(--fs-md);
}
.guide-tools input::placeholder { color: var(--muted-foreground); }

.gmod { margin-top: 36px; }
.gmod > .head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: var(--hairline) solid var(--border);
}
.gmod .n {
  font-family: var(--label);
  font-size: var(--fs-2xs);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--mod, var(--brand-ink));
}
.gmod h2 { flex: 1 1 auto; font-size: var(--fs-2xl); }
.gmod .frac { font-family: var(--label); font-size: var(--fs-2xs); }

.glossary dt {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 16px;
  font-size: var(--fs-md);
  font-weight: 600;
}
.glossary dt:first-child { margin-top: 0; }
/* A unit number is a real destination, not a footnote mark — at 18px square
   it was under a thumb's reach on a phone. The inline-block plus padding
   takes it past 24px without changing where the number sits. */
.glossary dt .u {
  display: inline-block;
  padding: 4px 6px;
  margin: -4px -6px;
  font-family: var(--label);
  font-size: var(--fs-2xs);
  font-weight: 400;
  color: var(--brand-ink);
  text-decoration: none;
}
.glossary dt .u:hover { text-decoration: underline; }
.glossary dd { max-width: 74ch; margin-top: 4px; font-size: var(--fs-md); line-height: 1.6; color: var(--muted-foreground); }

.review {
  margin-top: 24px;
  padding: 14px 18px;
  border: var(--hairline) solid var(--border);
  border-radius: var(--radius);
  background: var(--muted);
}
.review .label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--label);
  font-size: var(--fs-2xs);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}
.review ol { margin-left: 20px; font-size: var(--fs-md); line-height: 1.6; }
.review li { margin-bottom: 8px; }
.review li::marker { font-family: var(--label); font-size: var(--fs-xs); color: var(--muted-foreground); }

.no-hits { margin-top: 26px; font-size: var(--fs-md); color: var(--muted-foreground); }

/* The unit tag beside a term is a jump link, not part of the definition. The
   definition itself stays selectable — it is the reference copy. */
.glossary dt .u {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}