/* Argument-only continuation affordance: visible at the bottom of the
   viewport on every chapter except the last. */
.next-argument-section {
  position: fixed;
  right: clamp(18px, 3vw, 46px);
  bottom: max(20px, env(safe-area-inset-bottom, 0px) + 16px);
  z-index: 25;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  min-height: 54px;
  padding: 0;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 7px 24px rgba(13, 36, 26, .22);
  transition: background .16s ease, box-shadow .16s ease, transform .16s ease;
}
.next-argument-section[hidden] { display: none !important; }
.next-argument-section:hover {
  background: var(--accent-hover);
  box-shadow: 0 10px 28px rgba(13, 36, 26, .28);
  transform: translateY(-2px);
}
.next-argument-section:focus-visible {
  outline: 3px solid var(--deep-accent);
  outline-offset: 3px;
}
.next-argument-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
}
.next-argument-icon svg { width: 21px; height: 21px; display: block; }
@media (max-width: 620px) {
  .next-argument-section {
    right: 16px;
    bottom: max(16px, env(safe-area-inset-bottom, 0px) + 12px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .next-argument-section { transition: none; }
  .next-argument-section:hover { transform: none; }
}
@media print {
  .next-argument-section { display: none !important; }
}