:root:not([data-theme]),[data-theme=sepia]{--color-bg: #faf7f0;--color-text: #3c3434;--color-surface: #f1ebdd;--color-surface-text: #3c3434;--color-border: #e3dbc8;--color-muted: #8a8072;--color-button-bg: #efe8d8;--color-button-bg-hover: #e6dcc5;--color-accent: #8b5e3c;--color-accent-text: #ffffff;--color-overlay: rgba(40, 34, 24, .45);--color-danger: #b3492f}[data-theme=light]{--color-bg: #ffffff;--color-text: #1a1a1a;--color-surface: #f5f5f5;--color-surface-text: #1a1a1a;--color-border: #e0e0e0;--color-muted: #767676;--color-button-bg: #f0f0f0;--color-button-bg-hover: #e4e4e4;--color-accent: #2d6cdf;--color-accent-text: #ffffff;--color-overlay: rgba(0, 0, 0, .45);--color-danger: #c4432b}[data-theme=gray]{--color-bg: #d6d2c8;--color-text: #2a2a2a;--color-surface: #c7c3b8;--color-surface-text: #2a2a2a;--color-border: #b4b0a4;--color-muted: #5e5a50;--color-button-bg: #bebaae;--color-button-bg-hover: #b2ae9f;--color-accent: #4a5d45;--color-accent-text: #ffffff;--color-overlay: rgba(20, 20, 16, .45);--color-danger: #8c3b26}[data-theme=dark]{--color-bg: #1e1e1e;--color-text: #d8d4cc;--color-surface: #2a2a2a;--color-surface-text: #d8d4cc;--color-border: #3d3d3d;--color-muted: #9a968d;--color-button-bg: #333333;--color-button-bg-hover: #3f3f3f;--color-accent: #d2a24c;--color-accent-text: #1e1e1e;--color-overlay: rgba(0, 0, 0, .6);--color-danger: #e06c4f}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Malgun Gothic,sans-serif}body{background:var(--color-bg);color:var(--color-text)}#app{height:100%}.library-view{--lib-seg-font-size: 13px;height:100%;overflow-y:auto;padding:16px clamp(16px,4vw,40px) 40px;position:relative}.lib-header{display:flex;align-items:center;gap:12px;padding:4px 0 16px;border-bottom:1px solid color-mix(in srgb,var(--color-text) 10%,transparent);margin-bottom:16px}.library-title{font-size:22px;font-weight:600;flex:1;margin:0}.lib-header button{font:inherit;color:var(--color-text);background:none;padding:8px 14px;border-radius:8px;font-size:14px;border:1px solid color-mix(in srgb,var(--color-text) 18%,transparent);cursor:pointer}.lib-header button:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent)}.icon-btn{padding:8px;width:38px;height:38px;display:grid;place-items:center}.lib-header .fav-filter-btn{padding:0}.fav-filter-btn svg{width:17.6px;height:17.6px;flex-shrink:0}.lib-header .fav-filter-btn.active{background:color-mix(in srgb,var(--color-text) 14%,transparent);color:var(--color-accent);border-color:var(--color-accent)}.fav-star{position:absolute;top:6px;left:6px;display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--color-bg);color:var(--color-accent);box-shadow:0 1px 3px color-mix(in srgb,var(--color-text) 35%,transparent);pointer-events:none}.fav-star svg{width:13px;height:13px}.fav-star~.corrupted-badge{top:32px}.fav-star.fav-star-row{position:static;flex-shrink:0;width:auto;height:auto;background:none;box-shadow:none;border-radius:0}.fav-star.fav-star-row svg{width:14px;height:14px}.seg-group{display:flex;border:1px solid color-mix(in srgb,var(--color-text) 16%,transparent);border-radius:8px;overflow:hidden}.seg-btn{border-right:1px solid color-mix(in srgb,var(--color-text) 16%,transparent);opacity:.55;display:flex;align-items:center;justify-content:center}.view-btn svg{width:17.6px;height:17.6px;flex-shrink:0}.seg-btn:last-child{border-right:none}.seg-btn:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent)}.seg-btn.active{opacity:1;background:color-mix(in srgb,var(--color-text) 14%,transparent)}.lib-header .seg-btn{border:none;border-radius:0}.lib-header .settings-btn{border:1px solid color-mix(in srgb,var(--color-text) 18%,transparent);border-radius:8px;background:none;color:inherit;padding:0}.lib-header .settings-btn:hover{background:color-mix(in srgb,var(--color-text) 10%,transparent)}.lib-header .settings-btn[aria-expanded=true]{background:color-mix(in srgb,var(--color-text) 14%,transparent)}.settings-btn svg{width:17.6px;height:17.6px;flex-shrink:0}.settings-divider{border:none;border-top:1px solid var(--color-border);margin:4px 0}.settings-menu-row{display:flex;align-items:center;gap:12px;width:100%;padding:12px 4px;border:none;background:none;color:inherit;font:inherit;text-align:left;cursor:default}button.settings-menu-row{cursor:pointer}button.settings-menu-row:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent);border-radius:8px}.settings-menu-row+.settings-menu-row{border-top:1px solid color-mix(in srgb,var(--color-text) 8%,transparent)}.settings-menu-icon{display:flex;flex-shrink:0;width:22px;height:22px;font-size:20px;color:var(--color-muted)}.settings-menu-text{display:flex;flex-direction:column;flex:1;min-width:0;gap:2px}.settings-menu-title{font-size:14px}.settings-menu-subtitle{font-size:12px;color:var(--color-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.settings-menu-chevron{flex-shrink:0;font-size:16px;color:var(--color-muted)}.menu-toggle{position:relative;flex-shrink:0;display:inline-block;width:42px;height:24px}.menu-toggle input{position:absolute;inset:0;margin:0;opacity:0;cursor:pointer}.menu-toggle-track{position:absolute;inset:0;border-radius:12px;background:color-mix(in srgb,var(--color-text) 20%,transparent);transition:background .15s ease;pointer-events:none}.menu-toggle-thumb{position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background:var(--color-surface);box-shadow:0 1px 2px #0000004d;transition:transform .15s ease}.menu-toggle input:checked+.menu-toggle-track{background:var(--color-accent)}.menu-toggle input:checked+.menu-toggle-track .menu-toggle-thumb{transform:translate(18px)}.menu-toggle input:focus-visible+.menu-toggle-track{outline:2px solid var(--color-accent);outline-offset:2px}#lib-settings-title.is-subdued{font-size:15px;font-weight:500;color:var(--color-muted)}.storage-usage-block{margin-bottom:16px}.storage-usage-primary{display:flex;align-items:baseline;gap:6px;margin-bottom:8px}.storage-usage-value{font-size:22px;font-weight:700;color:var(--color-text)}.storage-usage-quota{font-size:13px;color:var(--color-muted)}.storage-gauge{height:5px;border-radius:3px;background:var(--color-button-bg);overflow:hidden;margin-bottom:8px}.storage-gauge-fill{height:100%;min-width:4px;width:0%;border-radius:3px;background:var(--color-accent);transition:width .2s ease}.storage-usage-percent{margin:0 0 3px;font-size:12px;color:var(--color-muted)}.storage-usage-caption{margin:0;font-size:10.5px;color:color-mix(in srgb,var(--color-muted) 70%,transparent)}.storage-info-box{padding:9px 12px;border-radius:8px;background:color-mix(in srgb,var(--color-text) 4%,transparent);margin-bottom:4px}.storage-info-box p{margin:0 0 5px;font-size:11px;color:color-mix(in srgb,var(--color-muted) 85%,transparent);line-height:1.5}.storage-info-box p:last-child{margin-bottom:0}.storage-book-list-header{padding:10px 0 4px}.storage-book-list{list-style:none;margin:0;padding:0}.storage-book-row{display:flex;align-items:center;gap:10px;padding:6px 0;border-top:1px solid color-mix(in srgb,var(--color-text) 8%,transparent)}.storage-book-row:first-child{border-top:none}.storage-book-format{flex-shrink:0;font-size:10px;font-weight:600;letter-spacing:.02em;padding:2px 5px;border-radius:4px;background:var(--color-button-bg);color:var(--color-muted)}.storage-book-title{flex:1;min-width:0;font-size:13.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.storage-book-size{flex-shrink:0;font-size:11px;color:var(--color-muted)}.storage-book-delete{flex-shrink:0;font:inherit;font-size:11px;padding:4px 10px;border-radius:6px;border:1px solid color-mix(in srgb,var(--color-danger) 40%,transparent);background:none;color:color-mix(in srgb,var(--color-danger) 65%,var(--color-text));cursor:pointer}.storage-book-delete:hover{border-color:var(--color-danger);color:var(--color-danger);background:color-mix(in srgb,var(--color-danger) 10%,transparent)}.add-book-btn{display:flex;align-items:center;gap:5px;margin-left:auto}.add-book-btn svg{font-size:15px}.lib-search{padding:10px 0 0}.lib-search input{width:100%;font:inherit;padding:10px 14px;border-radius:10px;border:1px solid color-mix(in srgb,var(--color-text) 16%,transparent);background:color-mix(in srgb,var(--color-text) 4%,transparent);color:var(--color-text);outline:none}.lib-sort{display:flex;align-items:center;gap:8px;padding:10px 0 0;margin-bottom:16px}.sort-dropdown{position:relative;display:inline-block}.sort-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:81px;height:34px;padding:0;border-radius:8px;border:1px solid color-mix(in srgb,var(--color-text) 16%,transparent);font:inherit;font-size:var(--lib-seg-font-size);color:var(--color-text);background:none;cursor:pointer}.sort-btn:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent)}.sort-btn svg{width:1.1em;height:1.1em;flex-shrink:0}.sort-dir-btn{flex-shrink:0;width:34px;height:34px;padding:0;display:grid;place-items:center;border-radius:8px;border:1px solid color-mix(in srgb,var(--color-text) 16%,transparent);background:none;color:var(--color-text);font-size:16px;cursor:pointer}.sort-dir-btn:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent)}.format-filter{margin-left:auto;height:34px}.format-seg{appearance:none;-webkit-appearance:none;border:none;border-right:1px solid var(--color-border);background:none;font:inherit;cursor:pointer;opacity:1;height:34px;padding:0;font-size:var(--lib-seg-font-size);font-weight:400;color:var(--color-muted);transition:background-color .12s ease,color .12s ease}.format-seg[data-format=all]{width:40px}.format-seg[data-format=txt]{width:50px}.format-seg[data-format=epub]{width:61px}.format-seg:hover{background:color-mix(in srgb,var(--color-text) 6%,transparent)}.format-seg:focus-visible{outline:2px solid var(--color-accent);outline-offset:-2px}.format-seg.active{background:var(--color-surface);color:var(--color-surface-text);font-weight:600}.sort-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:130px;list-style:none;margin:0;padding:6px 0;background:var(--color-bg);border:1px solid color-mix(in srgb,var(--color-text) 18%,transparent);border-radius:8px;box-shadow:0 8px 28px #00000038;z-index:60;display:none}.sort-dropdown.open .sort-menu{display:block}.sort-menu li{margin:0}.sort-menu button{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;padding:9px 14px;font:inherit;font-size:var(--lib-seg-font-size);color:var(--color-text);background:none;border:none;cursor:pointer}.sort-menu button:hover{background:color-mix(in srgb,var(--color-text) 8%,transparent)}.sort-menu button.active{font-weight:600}.sort-menu button.active:after{content:"✓";opacity:.7;margin-left:8px}.library-books{list-style:none;margin:0;padding:0}.library-books .empty{color:var(--color-muted);padding:40px 0;text-align:center}.library-books.view-grid{display:grid;grid-template-columns:repeat(var(--grid-columns, 2),1fr);gap:20px 16px}.book-card{cursor:pointer}.book-cover-wrap{position:relative;aspect-ratio:2 / 3;border-radius:6px;overflow:hidden;background:var(--color-surface);box-shadow:0 1px 3px #0003}.book-cover-grid{width:100%;height:100%;object-fit:cover;display:block}.book-cover-placeholder{display:flex;align-items:center;justify-content:center;text-align:center;padding:10px}.book-cover-placeholder span{font-size:.92rem;line-height:1.3;color:var(--color-muted);overflow:hidden;display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical}.format-badge{position:absolute;top:6px;right:6px;font-size:.65rem;font-weight:600;letter-spacing:.02em;padding:2px 6px;border-radius:4px;background:var(--color-overlay);color:#fff}.progress-bar{position:absolute;left:0;right:0;bottom:0;height:3px;background:#0003}.progress-bar-fill{height:100%;background:var(--color-accent)}.corrupted-badge{position:absolute;top:6px;left:6px;display:flex;align-items:center;gap:3px;font-size:.65rem;font-weight:600;padding:2px 6px;border-radius:4px;background:var(--color-danger);color:#fff}.corrupted-badge svg{font-size:11px}.book-card-title{margin-top:8px;font-size:.9rem;line-height:1.3;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.book-card-progress{margin-top:2px;font-size:.78rem;color:var(--color-muted)}.library-books.view-list{display:flex;flex-direction:column}.book-row{display:flex;align-items:center;gap:10px;padding:11px 6px;border-bottom:1px solid var(--color-border);cursor:pointer;min-width:0;border-radius:6px}.book-row:hover{background:var(--color-button-bg-hover)}.row-fmt{flex-shrink:0;font-size:10px;font-weight:600;color:var(--color-muted);background:var(--color-button-bg);border-radius:4px;padding:2px 6px;letter-spacing:.5px}.row-title{flex:1;min-width:0;display:flex;align-items:center;gap:6px;font-size:14px;font-weight:500;overflow:hidden}.row-title-text{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.row-author{flex:0 1 auto;max-width:30%;font-size:12px;color:var(--color-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.row-status{flex-shrink:0;font-size:12px;opacity:.6}.book-row.damaged .row-title{opacity:.65}.book-row.damaged .row-status{color:var(--color-danger);opacity:1}.drop-overlay{position:fixed;inset:0;background:var(--color-overlay);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;border:4px dashed rgba(255,255,255,.7);margin:12px;border-radius:12px;z-index:50;pointer-events:none}.drop-overlay[hidden]{display:none}.context-menu{position:fixed;background:var(--color-surface);color:var(--color-surface-text);border:1px solid var(--color-border);border-radius:8px;box-shadow:0 4px 16px #00000040;min-width:140px;overflow:hidden;z-index:60}.context-menu button{display:block;width:100%;text-align:left;padding:10px 14px;border:none;background:none;color:inherit;font:inherit;cursor:pointer}.context-menu button:hover{background:var(--color-button-bg-hover)}.context-menu button[data-action=delete]{color:var(--color-danger)}.modal-overlay{position:fixed;inset:0;background:var(--color-overlay);display:flex;align-items:center;justify-content:center;z-index:70;padding:16px}.modal-overlay[hidden]{display:none}.modal-panel{position:relative;background:var(--color-surface);color:var(--color-surface-text);border-radius:12px;padding:24px;width:100%;max-width:360px;max-height:80vh;overflow-y:auto}.modal-close{position:absolute;top:12px;right:12px;border:none;background:none;color:inherit;cursor:pointer;font-size:18px;display:flex}.modal-body h2{margin:0 24px 16px 0;font-size:1.1rem}.info-list{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;margin:0}.info-list dt{color:var(--color-muted);font-size:.85rem}.info-list dd{margin:0;font-size:.85rem}.info-list dd.danger{color:var(--color-danger)}@media (max-width: 480px){.lib-header,.lib-sort{flex-wrap:wrap;row-gap:8px}}#viewer-shell{height:100%;position:relative;--toolbar-height: calc(54px + env(safe-area-inset-top)) }#viewport{height:100%;position:relative}.viewer-loading{position:absolute;inset:0;z-index:50;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:var(--color-bg);color:var(--color-text);font-size:14px;animation:viewer-loading-in .2s ease .3s both}.viewer-loading-spinner{width:28px;height:28px;box-sizing:border-box;border:3px solid color-mix(in srgb,var(--color-text) 18%,transparent);border-top-color:var(--color-accent);border-radius:50%;animation:viewer-loading-spin .8s linear infinite}@keyframes viewer-loading-in{0%{opacity:0}to{opacity:1}}@keyframes viewer-loading-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion: reduce){.viewer-loading-spinner{animation:none}}.ui-layer{opacity:0;visibility:hidden;pointer-events:none;transition:opacity .18s ease,transform .18s ease,visibility 0s linear .18s}.ui-layer.is-visible{opacity:1;visibility:visible;pointer-events:auto;transition:opacity .18s ease,transform .18s ease}.ui-toolbar{position:fixed;top:0;left:0;right:0;z-index:80;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:calc(8px + env(safe-area-inset-top)) calc(12px + env(safe-area-inset-right)) 8px calc(12px + env(safe-area-inset-left));background:color-mix(in srgb,var(--color-bg) 95%,transparent);border-bottom:1px solid var(--color-border);transform:translateY(-6px)}.ui-toolbar.is-visible{transform:translateY(0)}.toolbar-start{grid-column:1;justify-self:start;min-width:max-content;display:flex;align-items:center}.toolbar-end{grid-column:3;justify-self:end;min-width:max-content;display:flex;align-items:center;gap:4px}.ui-toolbar .icon-btn,.ui-panel-header .icon-btn{border:none;background:none;color:inherit;cursor:pointer;border-radius:8px}.ui-toolbar .icon-btn:hover,.ui-panel-header .icon-btn:hover{background:color-mix(in srgb,currentColor 10%,transparent)}.ui-toolbar .icon-btn:disabled{opacity:.35;cursor:default}.ui-toolbar .icon-btn:disabled:hover{background:none}.ui-toolbar .icon-btn[hidden]{display:none}.ui-toolbar .icon-btn[aria-expanded=true]{background:color-mix(in srgb,currentColor 14%,transparent)}#back-btn svg,#toc-btn svg,#bookmark-btn svg,#search-btn svg,#fav-btn svg,#settings-btn svg{width:1.32em;height:1.32em}.toolbar-title{grid-column:2;justify-self:center;min-width:0;max-width:min(50vw,420px);text-align:center;font-weight:600;padding:0 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ui-scrim{position:fixed;top:var(--toolbar-height, 0px);left:0;right:0;bottom:0;z-index:65;background:var(--color-overlay)}.ui-panel{position:fixed;top:var(--toolbar-height, 0px);right:0;bottom:0;z-index:70;width:min(360px,86vw);display:flex;flex-direction:column;background:var(--color-surface);color:var(--color-surface-text);box-shadow:-8px 0 24px #00000040;padding-right:env(safe-area-inset-right);padding-bottom:env(safe-area-inset-bottom);transform:translate(100%)}.ui-panel.is-visible{transform:translate(0)}.ui-panel-header{display:flex;align-items:center;justify-content:space-between;flex:0 0 auto;padding:12px 8px 12px 16px;border-bottom:1px solid var(--color-border)}.ui-panel-header h2{margin:0;font-size:16px;font-weight:600}.ui-panel-header-title{display:flex;align-items:center;gap:4px;min-width:0}.ui-panel-header-title .icon-btn[hidden]{display:none}.ui-panel-body{flex:1 1 auto;overflow-y:auto;padding:8px 16px 16px;scrollbar-width:thin;scrollbar-color:var(--color-muted) transparent}.ui-panel-body::-webkit-scrollbar{width:8px}.ui-panel-body::-webkit-scrollbar-track{background:transparent}.ui-panel-body::-webkit-scrollbar-thumb{background-color:var(--color-muted);border-radius:4px}#toc-list{padding-top:0}.toc-entry{display:block;width:100%;text-align:left;padding:12px 10px;border:none;border-bottom:1px solid var(--color-border);border-radius:0;background:none;font:inherit;font-size:13px;line-height:1.35;color:inherit;cursor:pointer}.toc-entry:last-child{border-bottom:none}.toc-entry:hover{background:color-mix(in srgb,var(--color-surface-text) 8%,transparent)}.toc-entry:focus-visible{outline:2px solid var(--color-accent);outline-offset:-2px}.toc-entry.is-current{background:color-mix(in srgb,var(--color-accent) 14%,transparent);font-weight:600;box-shadow:inset 3px 0 0 var(--color-accent)}.search-panel-body{display:flex;flex-direction:column;padding:12px 16px 16px}.search-form{flex:0 0 auto}.search-input{width:100%;font:inherit;color:var(--color-surface-text);background:var(--color-bg);border:1px solid var(--color-border);border-radius:6px;padding:8px 10px}.search-input:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}.search-status{flex:0 0 auto;padding:10px 2px;font-size:13px;opacity:.75}.search-results{flex:1 1 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