/* ─── Frequently Used Arguments ────────────────────────────────────────────────
   A per-section footer of the common objections to that section's argument, each
   with a sourced rebuttal. Collapsible via native <details>/<summary> — no JS,
   keyboard-accessible, and cheap on mobile. Styled off the shared theme tokens. */

.fua {
  margin: 2.4rem 0 0.4rem;
  border-top: 1px solid var(--border);
  padding-top: 1.4rem;
}

.fua-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.fua-item {
  border-bottom: 1px solid var(--border);
}
.fua-item:first-of-type { border-top: 1px solid var(--border); }

.fua-q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.85rem 0.2rem;
  font-size: 0.97rem;
  line-height: 1.5;
  color: var(--text-bright);
  transition: color 0.12s;
}
.fua-q::-webkit-details-marker { display: none; }
.fua-q:hover { color: var(--accent); }

/* The +/– toggle glyph. */
.fua-q::before {
  content: "+";
  font-family: var(--mono);
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--accent);
  flex: 0 0 auto;
}
.fua-item[open] > .fua-q::before { content: "–"; }

.fua-a {
  padding: 0 0.2rem 1.05rem 1.6rem;
  font-size: 0.92rem;
  line-height: 1.68;
  color: var(--text);
}
.fua-a a { color: var(--accent); }
.fua-a strong { color: var(--text-bright); }

.fua-a .fua-src {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

@media (max-width: 600px) {
  .fua-q { font-size: 0.92rem; }
  .fua-a { font-size: 0.88rem; padding-left: 1.4rem; }
}