.reading-tools{position:fixed;z-index:7000;right:20px;bottom:20px;display:flex;align-items:center;gap:8px}
.reader-tools{display:flex;padding:3px;background:rgba(255,255,255,.94);box-shadow:0 5px 24px rgba(52,56,61,.14);backdrop-filter:blur(8px)}
.reader-tools button{width:32px;height:32px;padding:0;border:0;background:transparent;color:#6a6d71;cursor:pointer;font:600 12px/1 var(--font-sans)}
.reader-tools button.active{background:var(--ink);color:#fff}.reader-tools button:hover,.reader-tools button:focus-visible{color:var(--red)}
.reading-tools .back-to-top{position:static;display:none;width:38px;height:38px;padding:0;border:0;background:rgba(52,56,61,.92);color:#fff;box-shadow:0 5px 24px rgba(52,56,61,.18);opacity:1;pointer-events:auto;cursor:pointer}
.reading-tools .back-to-top.visible{display:block;opacity:1;pointer-events:auto;animation:reading-tool-in .18s ease-out}.reading-tools .back-to-top:hover{background:var(--red)}.reading-tools .back-to-top span{display:block;font:400 23px/1 var(--font-sans);transform:translateY(-1px)}
@keyframes reading-tool-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media(max-width:700px){.reading-tools{right:12px;bottom:12px}.reader-tools button{width:30px;height:30px}.reading-tools .back-to-top{width:36px;height:36px}}
@media(prefers-reduced-motion:reduce){.reading-tools .back-to-top.visible{animation:none}}