.reader { margin: 0; min-height: 100vh; background: #f2f2f2; }
.reader-head { padding: 12px 24px; border-bottom: 1px solid var(--rule); background: #fff; display: flex; align-items: center; justify-content: space-between; gap: 12px 32px; }
.reader-head a { display: inline-flex; align-items: center; min-height: 44px; font: .85rem/1.5 var(--sans); }
.reader-head h1 { margin: 0; font-size: 1.1rem; font-weight: 500; line-height: 1.6; }
.reader-head h1 span { margin-left: 20px; font: .75rem/1.5 var(--sans); }
.reader-main { padding: 20px 16px; }
.paper { display: flex; justify-content: center; margin: 0; }
.paper img { display: block; width: auto; height: auto; max-width: 100%; max-height: calc(100svh - 210px); object-fit: contain; border: 1px solid #aaa; background: #fff; }
.reader-controls { display: grid; grid-template-columns: 1fr 100px 1fr; align-items: center; gap: 20px; max-width: 640px; padding: 0 16px; margin-inline: auto; font-family: var(--sans); }
.reader-controls button { min-height: 48px; padding: 10px 12px; border: 1px solid var(--ink); background: #fff; font: .9rem/1.5 var(--sans); cursor: pointer; }
.reader-controls button:hover:not(:disabled) { background: var(--ink); color: #fff; }
.reader-controls button:disabled { color: #666; border-color: #aaa; cursor: default; }
#page-status { margin: 0; text-align: center; font-size: .95rem; font-variant-numeric: tabular-nums; line-height: 1.5; }
#page-status span { display: block; font-size: .75rem; }
.reader-help { text-align: center; margin: 12px 16px; font: .75rem/1.7 var(--sans); color: var(--sub); }
.reader-help span { margin-left: 20px; }
#load-error { text-align: center; margin: 16px 0; }
.reader noscript { display: block; max-width: 640px; margin: auto; padding: 16px; }
.reader noscript img { display: block; width: 100%; height: auto; margin-block: 24px; }
@media (max-width: 760px) {
  .reader-head { padding: 8px 16px 12px; display: block; }
  .reader-head h1 { font-size: 1.05rem; }
  .reader-head h1 span { margin-left: 12px; }
  .reader-main { padding: 16px 12px; }
  .paper img { max-height: none; width: 100%; }
  .reader-controls { position: sticky; bottom: 0; max-width: none; padding: 10px 12px; gap: 8px; grid-template-columns: 1fr 72px 1fr; background: #f2f2f2; border-top: 1px solid var(--rule); }
  .reader-controls button { font-size: .78rem; padding-inline: 6px; }
  .reader-help { font-size: .72rem; }
  .reader-help span { display: block; margin: 0; }
}