:root{--bg: #111318;--bg-raised: #191c22;--border: #2a2e37;--text: #eef0f4;--text-dim: #9aa1ad;--accent: #e8c384;--danger: #e8746b;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent;overscroll-behavior:none}#app{height:100%;display:flex;flex-direction:column}button{font-family:inherit;font-size:1rem;color:var(--text);background:var(--bg-raised);border:1px solid var(--border);border-radius:10px;padding:.6rem 1rem;cursor:pointer}button:active{opacity:.7}button.primary{background:var(--accent);color:#14151a;border-color:var(--accent);font-weight:600}button.danger{color:var(--danger)}a{color:var(--accent)}.topbar{padding:calc(var(--safe-top) + .75rem) 1rem .75rem;display:flex;align-items:center;justify-content:space-between;gap:.75rem;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:10}.topbar h1{font-size:1.25rem;margin:0;flex:1}.topbar .actions{display:flex;gap:.5rem}.library{flex:1;overflow-y:auto;padding:1rem;padding-bottom:calc(var(--safe-bottom) + 1rem)}.storage-warning{background:#3a2a1a;border:1px solid #6b4a1e;color:#ffd9a0;padding:.6rem .9rem;border-radius:10px;font-size:.85rem;margin-bottom:1rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-dim);padding:4rem 1rem;gap:.5rem}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1rem}.book-card{display:flex;flex-direction:column;gap:.4rem;text-align:left;padding:0;background:none;border:none;cursor:pointer;position:relative}.book-cover{aspect-ratio:2 / 3;border-radius:8px;background:var(--bg-raised);border:1px solid var(--border);overflow:hidden;display:flex;align-items:center;justify-content:center;color:var(--text-dim);font-size:.7rem;padding:.5rem;text-align:center;position:relative}.book-cover img{width:100%;height:100%;object-fit:cover}.book-progress{position:absolute;bottom:0;left:0;right:0;height:4px;background:#0006}.book-progress-fill{height:100%;background:var(--accent)}.book-title{font-size:.8rem;font-weight:600;line-height:1.2;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.book-author{font-size:.72rem;color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.book-delete{position:absolute;top:6px;right:6px;width:26px;height:26px;padding:0;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#111318d9;font-size:.9rem;line-height:1}.reader{flex:1;display:flex;flex-direction:column;overflow:hidden}.reader-topbar{padding:calc(var(--safe-top) + .5rem) .75rem .5rem;display:flex;align-items:center;gap:.5rem;border-bottom:1px solid var(--border);background:var(--bg)}.reader-topbar .reader-title{flex:1;font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader-viewport{flex:1;position:relative;overflow:hidden}#epub-view,#pdf-view{position:absolute;inset:0}#pdf-view{overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;align-items:center;padding:.5rem 0 calc(var(--safe-bottom) + .5rem)}#pdf-view canvas{max-width:100%;margin-bottom:.5rem;box-shadow:0 2px 12px #0006}.reader-tap-zone{position:absolute;top:0;bottom:0;width:20%;z-index:5}.reader-tap-zone.prev{left:0}.reader-tap-zone.next{right:0}.reader-bottombar{padding:.5rem 1rem calc(var(--safe-bottom) + .5rem);border-top:1px solid var(--border);display:flex;align-items:center;gap:.75rem;font-size:.75rem;color:var(--text-dim);background:var(--bg)}.reader-progress-bar{flex:1;height:4px;background:var(--bg-raised);border-radius:2px;overflow:hidden}.reader-progress-fill{height:100%;background:var(--accent)}.import-status{position:fixed;bottom:calc(var(--safe-bottom) + 1rem);left:1rem;right:1rem;background:var(--bg-raised);border:1px solid var(--border);border-radius:12px;padding:.75rem 1rem;font-size:.85rem;z-index:100;box-shadow:0 4px 20px #0006}.import-status.error{border-color:var(--danger);color:var(--danger)}.toc-overlay{position:absolute;inset:0;background:#0a0b0ed9;z-index:20;display:flex;flex-direction:column}.toc-header{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;border-bottom:1px solid var(--border)}.toc-list{overflow-y:auto;padding:.5rem 0}.toc-item{display:block;width:100%;text-align:left;background:none;border:none;border-radius:0;padding:.75rem 1.25rem;color:var(--text);font-size:.95rem}.toc-item:active{background:var(--bg-raised)}.hidden{display:none!important}.spinner{display:inline-block;width:1em;height:1em;border:2px solid var(--text-dim);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}