/* Canonical page-52 answer controls: reused unchanged by riverside puzzles. */
.ebook-fold-clue-input {
  min-width: 0;
  padding: .18em .28em .3em;
  color: #fff;
  border: 0;
  border-bottom: 2px solid rgba(255, 255, 255, .88);
  border-radius: 0;
  outline: 0;
  background: rgba(255, 255, 255, .06);
  box-shadow: none;
  font: inherit;
  letter-spacing: .06em;
  text-align: center;
}
.ebook-fold-clue-input:focus {
  border-bottom-color: #fff;
  background: rgba(255, 255, 255, .14);
}
.ebook-fold-clue-submit {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: #284b43;
  border: 1px solid rgba(255, 255, 255, .74);
  border-radius: 50%;
  background: rgba(249, 250, 241, .92);
  box-shadow: 0 3px 10px rgba(26, 38, 40, .24);
  font: 800 24px/1 Arial, sans-serif;
  cursor: pointer;
}
.ebook-fold-clue-submit:disabled {
  opacity: .42;
  cursor: default;
}
.ebook-fold-clue-submit:not(:disabled):hover,
.ebook-fold-clue-submit:not(:disabled):focus-visible {
  background: #fff;
  transform: scale(1.05);
}
.ebook-fold-clue-submit:focus-visible { outline: 2px solid #fff; outline-offset: 4px; }

.riverside-answer { font-family: "I.MingCP", "Noto Serif TC", "Songti TC", "PMingLiU", serif; font-size: clamp(18px, 2vw, 25px); font-weight: 600; line-height: normal; letter-spacing: .08em; }
.riverside-answer .ebook-fold-clue-input { width: 6em; max-width: 38vw; }
.riverside-answer .ebook-fold-clue-submit { flex: 0 0 auto; }
.riverside-answer, .riverside-answer * { text-shadow: 0 0 1px rgba(255,255,255,.62), 0 0 4px rgba(255,255,255,.28) !important; }
@media(max-width:760px) {
 .riverside-answer { font-size:clamp(15px,4.35vw,19px); letter-spacing:.03em; }
 .ebook-fold-clue-submit { width:40px; height:40px; font-size:21px; }
}