/* =========================================================================
   glossary.css — Glossary index + term-page styles
   ========================================================================= */

/* ===== INDEX HEAD ===== */
.gloss-head {
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
  position: relative;
  border-bottom: 1px solid var(--border);
}
.gloss-head::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gradient-frame);
}
.gloss-head__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
@media (max-width: 980px) { .gloss-head__grid { grid-template-columns: 1fr; } }
.gloss-head__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 380;
  line-height: 1.02;
  letter-spacing: -0.022em;
  color: var(--text-heading);
  margin: 1.5rem 0;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.gloss-head__lede {
  font-family: var(--font-reading);
  font-size: clamp(1.15rem, 1.5vw, 1.4rem);
  line-height: 1.5;
  color: var(--text-heading);
  margin: 0;
  max-width: 38rem;
  text-wrap: pretty;
  padding-block: 1.5rem;
  border-block: 1px solid var(--border);
  position: relative;
}
.gloss-head__lede::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px;
  width: 48px; height: 2px;
  background: var(--gradient-frame);
}
.gloss-head__meta {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  display: grid;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--size-tiny);
}
.gloss-head__meta dt {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.gloss-head__meta dd {
  font-family: var(--font-reading);
  margin: 0 0 0.5rem;
  font-size: var(--size-small);
}

/* ===== A–Z JUMP ===== */
.gloss-az {
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 56px;
  background: var(--surface);
  z-index: 5;
}
.gloss-az__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  align-items: center;
}
.gloss-az__label {
  font-family: var(--font-mono);
  font-size: var(--size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-right: 0.75rem;
}
.gloss-az a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-body);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: all var(--dur-fast) var(--ease-out);
}
.gloss-az a:hover {
  border-color: var(--brand-blue-deep);
  color: var(--brand-blue-deep);
}
.gloss-az a.is-disabled {
  color: var(--neutral-400);
  pointer-events: none;
  border-color: var(--border);
}

/* ===== TERM LIST ===== */
.gloss-list {
  padding-block: clamp(2rem, 4vw, 3rem);
}
.gloss-letter {
  scroll-margin-top: 7rem;
  padding-block: 2rem 1rem;
  border-top: 2px solid var(--neutral-900);
}
.gloss-letter:first-of-type { border-top: 1px solid var(--border-strong); }
.gloss-letter__head {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 1rem;
}
.gloss-letter__letter {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 380;
  line-height: 1;
  color: var(--brand-blue-mark);
  font-variation-settings: "opsz" 144;
}
.gloss-letter__count {
  font-family: var(--font-mono);
  font-size: var(--size-tiny);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.gloss-terms {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border-block: 1px solid var(--border-strong);
}
@media (max-width: 760px) { .gloss-terms { grid-template-columns: 1fr; } }

.gloss-term-card {
  background: var(--surface);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--text-body);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  transition: background var(--dur-fast) var(--ease-out);
  align-items: baseline;
}
.gloss-term-card:hover { background: var(--surface-raised); }
.gloss-term-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  margin: 0;
  color: var(--text-heading);
  letter-spacing: -0.005em;
}
.gloss-term-card .gloss-term-card__abbr {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--brand-blue-deep);
}
.gloss-term-card p {
  grid-column: 1 / -1;
  font-size: var(--size-small);
  line-height: 1.5;
  margin: 0;
  max-width: 32rem;
  color: var(--text-body);
}
.gloss-term-card__cat {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== TERM PAGE ===== */
.term-head {
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
  position: relative;
  border-bottom: 1px solid var(--border);
}
.term-head::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--gradient-frame);
}
.term-classifiers {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.term-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text-heading);
  margin: 0 0 0.5rem;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.term-title small {
  display: block;
  font-size: 0.4em;
  font-weight: 400;
  font-style: italic;
  color: var(--text-muted);
  font-variation-settings: "opsz" 14;
  margin-top: 0.5rem;
  letter-spacing: 0;
}

/* ===== DUAL-LAYER DEFINITION ===== */
.term-body {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}
.term-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
  gap: clamp(2rem, 5vw, 4rem);
}
@media (max-width: 980px) {
  .term-body__grid { grid-template-columns: 1fr; }
  .term-body__rail { order: 2; }
}

.term-main { max-width: 44rem; }

.defn {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}
.defn:first-child { padding-top: 0; }
.defn:last-child { border-bottom: none; }
.defn__label {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
}
.defn__label::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
}
.defn--plain .defn__label::before { background: var(--green-500); }
.defn--plain .defn__label { color: var(--green-700); }
.defn--tech .defn__label::before { background: var(--brand-blue-mark); }
.defn--tech .defn__label { color: var(--brand-blue-deep); }

.defn--plain p {
  font-family: var(--font-reading);
  font-size: clamp(1.15rem, 1.5vw, 1.35rem);
  line-height: 1.55;
  font-weight: 400;
  color: var(--text-heading);
  margin: 0 0 1em;
  max-width: 38rem;
  text-wrap: pretty;
}

.defn--tech p {
  font-family: var(--font-reading);
  font-size: var(--size-body);
  line-height: 1.7;
  color: var(--text-body);
  margin: 0 0 1em;
  max-width: 38rem;
}
.defn--tech .tnum { font-family: var(--font-mono); }

/* ===== RELATED TERM CHIPS ===== */
.term-related {
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.term-related__label {
  font-family: var(--font-mono);
  font-size: var(--size-tiny);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}
.term-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.term-chips a {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  font-family: var(--font-reading);
  font-size: var(--size-small);
  color: var(--text-body);
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--dur-fast) var(--ease-out);
}
.term-chips a:hover {
  border-color: var(--brand-blue-deep);
  color: var(--brand-blue-deep);
  background: var(--surface-raised);
}

/* ===== TERM QUESTIONS ===== */
.term-questions {
  padding-block: 2rem 0;
}
.term-questions h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 400;
  margin: 0 0 1rem;
  letter-spacing: -0.005em;
}
.term-questions .term-questions__sub {
  font-size: var(--size-small);
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

/* ===== TERM RAIL ===== */
.term-body__rail {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 6rem;
  align-self: start;
}
@media (max-width: 980px) {
  .term-body__rail { position: static; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .term-body__rail { grid-template-columns: 1fr; }
}