body .back-to-top{position:fixed;right:max(18px,env(safe-area-inset-right));bottom:max(24px,env(safe-area-inset-bottom));z-index:45;width:46px;height:46px;min-height:46px;padding:0;display:grid;place-items:center;border:1px solid var(--line,#d8c7bb);border-radius:50%;background:var(--card,#f8f4e9);color:var(--text,#775c55);box-shadow:0 4px 16px #775c551a;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);pointer-events:none;transition:opacity .18s ease,transform .18s ease,visibility .18s;touch-action:manipulation}body .back-to-top.is-visible{opacity:.94;visibility:visible;transform:none;pointer-events:auto}body .back-to-top:hover,body .back-to-top:focus-visible{opacity:1;background:var(--accent-soft,#d5eae3)}body .back-to-top:focus-visible,.story-font-controls button:focus-visible{outline:2px solid var(--muted,#775c55);outline-offset:3px}.stories-page .book-prose p{font-size:var(--story-prose-size,18px)}.story-font-controls{position:sticky;top:8px;z-index:6;display:flex;align-items:center;gap:4px;width:fit-content;max-width:100%;padding:4px 6px;margin:0 0 16px auto;background:var(--card,#f8f4e9);border:1px solid var(--line);border-radius:12px;box-shadow:0 3px 10px #775c550a;font-family:system-ui,sans-serif;font-size:12px;color:var(--muted)}.story-font-controls>span{padding:0 7px}.stories-page .story-font-controls button{height:38px;min-height:38px;min-width:38px;padding:4px 8px;font:inherit;font-size:14px;border:0;background:transparent;border-radius:8px}.stories-page .story-font-controls button:hover:not(:disabled){background:var(--accent-soft)}.story-font-controls output{min-width:34px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums}.stories-page .story-font-controls button:disabled{opacity:.35;cursor:default}@media(max-width:850px){body:not(.diary-page):not(.stories-page)>.back-to-top{bottom:calc(88px + env(safe-area-inset-bottom))}.back-to-top{right:16px}.story-font-controls{top:6px}}@media(prefers-reduced-motion:reduce){body .back-to-top{transition:none;transform:none}}