:root {
  --ink: #3a2418;
  --paper: #f6efe4;
  --cream: #fff8f0;
  --gold: #c4a574;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Verdana, Geneva, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 50% -10%, #fff 0%, transparent 60%),
    var(--paper);
}
.top { text-align: center; padding: 28px 16px 8px; }
.brand {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  color: #8a6a52;
}
h1 { font-weight: 700; font-size: 28px; margin: 8px 0 0; }
.shelf {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 260px));
  gap: 28px;
  justify-content: center;
  padding: 28px 20px 64px;
}
.card {
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
}
.card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px 14px 14px 6px;
  box-shadow: 8px 10px 24px rgba(58, 36, 24, 0.22);
}
.card strong { display: block; margin-top: 12px; font-size: 16px; }
.card span { display: block; margin-top: 4px; font-size: 13px; color: #7a5b48; }
.reader { padding: 8px 12px 32px; }
.reader-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  max-width: 1100px;
  margin: 0 auto 8px;
}
.reader-bar h2 { margin: 0; font-size: 18px; text-align: center; }
.pager { justify-self: end; display: flex; align-items: center; gap: 8px; }
button {
  font: inherit;
  border: 1px solid #e4d3c0;
  background: var(--cream);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
}
button.text { justify-self: start; }
.pager button { width: 42px; height: 42px; padding: 0; font-size: 26px; line-height: 1; }
#page-label { min-width: 72px; text-align: center; font-size: 13px; }
.stage {
  max-width: 1100px;
  margin: 0 auto;
  background: #efe4d4;
  border-radius: 16px;
  padding: 18px 8px 8px;
  box-shadow: inset 0 0 0 1px rgba(58, 36, 24, 0.06);
}
#flip { width: 100%; height: min(78vh, 820px); }
.hint {
  text-align: center;
  color: #7a5b48;
  font-size: 13px;
}
@media (max-width: 720px) {
  .reader-bar { grid-template-columns: 1fr; justify-items: center; }
  button.text, .pager { justify-self: center; }
  h1 { font-size: 22px; }
}