.reader { padding: 48px 0 16px; }
.reader-back { display: inline-block; margin-bottom: 24px; }
.reader h1 { margin: 12px 0; font-size: clamp(30px, 5vw, 48px); }
.reader-controls { position: sticky; top: 0; z-index: 2; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: center; padding: 16px 8px; margin-top: 28px; background: var(--paper); border-block: 1px solid var(--rule); }
.reader-controls form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: center; margin: 0; }
.reader-controls button, .reader-controls input { font: 16px/1.2 system-ui, sans-serif; border: 1px solid var(--rule); border-radius: 5px; padding: 10px; background: #fffaf2; color: var(--ink); min-height: 44px; }
.reader-controls button { cursor: pointer; }
.reader-controls button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.reader-controls button:disabled { opacity: .4; cursor: default; }
.reader-controls :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.reader-controls input { width: 76px; }
.page-number-control { display: flex; align-items: stretch; }
.reader-controls .page-number-control input { width: 64px; border-radius: 5px 0 0 5px; appearance: textfield; -moz-appearance: textfield; }
.page-number-control input::-webkit-inner-spin-button, .page-number-control input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.page-number-arrows { display: flex; flex-direction: column; }
.reader-controls .page-number-arrows button { display: block; width: 32px; min-height: 24px; padding: 2px 6px; font-size: 12px; color: var(--ink); background: var(--sand); border-left: 0; border-radius: 0 5px 0 0; }
.reader-controls .page-number-arrows button + button { border-top: 0; border-radius: 0 0 5px 0; }
#reader-status { text-align: center; font: 14px/1.5 system-ui, sans-serif; color: var(--muted); padding: 14px 0; }
.reader-viewport { overflow: auto; max-height: 85vh; background: var(--sand); padding: 12px; border: 1px solid var(--rule); }
#book-page { display: block; width: 100%; max-width: 820px; height: auto; margin: auto; box-shadow: 0 6px 24px #0002; }
.reader-spreads #book-page { max-width: 1160px; }
.reader-viewport.zoomed #book-page { width: var(--book-zoom-width, 1400px); max-width: none; }
@media(max-width: 600px) { .reader { padding-top: 28px; } .reader-controls { gap: 8px; padding: 10px 0; } .reader-controls form { order: 1; width: 100%; } .reader-viewport { padding: 4px; } }