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--tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.shelf{background-color:var(--background);flex-direction:column;min-height:100dvh;display:flex}.shelf-header{z-index:var(--z-nav);padding:var(--space-5) var(--space-6) var(--space-3);background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur);backdrop-filter:var(--backdrop-blur);border-bottom:.5px solid var(--separator);position:sticky;top:0}.shelf-titlebar{justify-content:space-between;align-items:flex-end;gap:var(--space-4);display:flex}.shelf-title{font-size:var(--text-large-title);font-weight:var(--font-weight-bold);line-height:var(--leading-large-title);letter-spacing:-.02em;color:var(--label);margin:0}.shelf-actions{align-items:center;gap:var(--space-3);display:flex}.shelf-search{align-items:center;gap:var(--space-2);height:36px;padding:0 var(--space-3);background-color:var(--fill-tertiary);border:.5px solid var(--separator);border-radius:var(--radius-md);color:var(--label-secondary);transition:background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);display:flex}.shelf-search:focus-within{background-color:var(--surface);border-color:var(--accent)}.shelf-search svg{flex-shrink:0}.shelf-search-input{width:180px;color:var(--label);font-size:var(--text-subheadline);background:0 0;border:none;outline:none;font-family:inherit}.shelf-search-input::placeholder{color:var(--label-secondary)}.shelf-upload-btn{align-items:center;gap:var(--space-1);height:36px;padding:0 var(--space-4);border-radius:var(--radius-md);background-color:var(--accent);color:var(--on-accent,#fff);font-size:var(--text-subheadline);font-weight:var(--font-weight-semibold);cursor:pointer;transition:transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast) var(--ease-out);border:none;font-family:inherit;display:inline-flex}.shelf-upload-btn:hover{opacity:.9}.shelf-upload-btn:active{transform:scale(.97)}.shelf-upload-btn:disabled{opacity:.5;cursor:default}.shelf-manage-btn{height:36px;padding:0 var(--space-3);border-radius:var(--radius-md);background-color:var(--fill-secondary);color:var(--accent);font-size:var(--text-subheadline);font-weight:var(--font-weight-semibold);cursor:pointer;border:none;font-family:inherit}.shelf-manage-btn:hover{background-color:var(--fill-tertiary)}.shelf-manage-btn:disabled{color:var(--label-tertiary);cursor:default}.shelf-sort{display:inline-flex;position:relative}.shelf-sort-btn{align-items:center;gap:var(--space-1);height:36px;padding:0 var(--space-3);border-radius:var(--radius-md);background-color:var(--fill-secondary);color:var(--label);font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);white-space:nowrap;cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);border:none;font-family:inherit;display:inline-flex}.shelf-sort-btn:hover{background-color:var(--fill-tertiary)}.shelf-sort-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.shelf-sort-btn[aria-expanded=true]{background-color:var(--fill-tertiary)}.shelf-sort-glyph{color:var(--label-secondary);flex-shrink:0}.shelf-sort-label{flex-shrink:0}.shelf-sort-arrow{color:var(--accent);flex-shrink:0}.shelf-sort-menu{top:calc(100% + var(--space-2));z-index:var(--z-nav);min-width:140px;padding:var(--space-1);border:.5px solid var(--separator);border-radius:var(--radius-lg);background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);box-shadow:var(--shadow-elevated);animation:shelf-sort-menu-in var(--duration-fast) var(--ease-out);position:absolute;right:0}.shelf-sort-item{justify-content:space-between;align-items:center;gap:var(--space-2);width:100%;min-height:36px;padding:0 var(--space-3);border-radius:var(--radius-md);color:var(--label);font-size:var(--text-subheadline);text-align:left;cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);background:0 0;border:none;font-family:inherit;display:flex}.shelf-sort-item:hover{background-color:var(--fill-quaternary)}.shelf-sort-item:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.shelf-sort-item--active{background-color:var(--fill-tertiary);color:var(--accent);font-weight:var(--font-weight-semibold)}.shelf-sort-item-label{flex:1;min-width:0}@keyframes shelf-sort-menu-in{0%{opacity:0;transform:translateY(-4px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.shelf-management-bar{justify-content:space-between;align-items:center;gap:var(--space-4);min-height:52px;padding:var(--space-2) var(--space-6);border-bottom:.5px solid var(--separator);background-color:var(--background-grouped);display:flex}.shelf-management-count{color:var(--label-secondary);font-size:var(--text-subheadline);font-variant-numeric:tabular-nums}.shelf-management-actions{align-items:center;gap:var(--space-2);display:flex}.shelf-management-button{justify-content:center;align-items:center;gap:var(--space-1);min-height:36px;padding:0 var(--space-3);border-radius:var(--radius-md);background-color:var(--fill-secondary);color:var(--label);font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);white-space:nowrap;cursor:pointer;border:none;font-family:inherit;display:inline-flex}.shelf-management-button--danger{background-color:color-mix(in srgb, var(--red) 12%, transparent);color:var(--red)}.shelf-management-button:disabled{opacity:.4;cursor:default}.shelf-body{flex:1;align-items:flex-start;min-height:0;display:flex}.shelf-sidebar{width:264px;margin:var(--space-3) 0 0 var(--space-4);padding:var(--space-3) 0 var(--space-4);border-radius:var(--radius-xl);background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur);backdrop-filter:var(--backdrop-blur);border:.5px solid var(--separator);flex-shrink:0;position:sticky;top:104px;overflow:hidden}.shelf-main{min-width:0;padding:var(--space-4) var(--space-6) var(--space-16);flex:1}.shelf-context{align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background-color:var(--surface);border:.5px solid var(--separator);display:flex}.shelf-context-back{height:28px;padding:0 var(--space-2);border-radius:var(--radius-full);color:var(--accent);font-size:var(--text-subheadline);cursor:pointer;background:0 0;border:none;align-items:center;font-family:inherit;display:inline-flex}.shelf-context-back:hover{background-color:color-mix(in srgb, var(--accent) 10%, transparent)}.shelf-context-title{min-width:0;font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);text-wrap:balance;text-overflow:ellipsis;white-space:nowrap;flex:1;margin:0;overflow:hidden}.shelf-context-count{font-size:var(--text-footnote);color:var(--label-secondary);font-variant-numeric:tabular-nums;flex-shrink:0}.shelf-grid{gap:var(--space-6) var(--space-5);grid-template-columns:repeat(auto-fill,minmax(168px,1fr));display:grid}.shelf-chips{gap:var(--space-2);padding:var(--space-3) 0;scrollbar-width:none;-webkit-overflow-scrolling:touch;display:none;overflow-x:auto}.shelf-chips::-webkit-scrollbar{display:none}.shelf-chip{align-items:center;gap:var(--space-1);height:32px;padding:0 var(--space-3);border:.5px solid var(--separator);border-radius:var(--radius-full);background-color:var(--surface);color:var(--label-secondary);font-size:var(--text-subheadline);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);flex-shrink:0;font-family:inherit;display:inline-flex}.shelf-chip--active{background-color:var(--accent);color:var(--on-accent,#fff);font-weight:var(--font-weight-medium);border-color:#0000}.shelf-upload-panel{margin-bottom:var(--space-4);padding:var(--space-4);border:.5px solid var(--separator);border-radius:var(--radius-lg);background-color:var(--surface);box-shadow:var(--shadow-card)}.shelf-upload-panel-title{margin:0 0 var(--space-3);font-size:var(--text-footnote);font-weight:var(--font-weight-semibold);color:var(--label-secondary)}.shelf-upload-list{gap:var(--space-3);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.shelf-upload-item{gap:var(--space-1) var(--space-3);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"name status""track track";align-items:center;display:grid}.shelf-upload-name{font-size:var(--text-subheadline);color:var(--label);text-overflow:ellipsis;white-space:nowrap;grid-area:name;overflow:hidden}.shelf-upload-status{font-size:var(--text-caption1);color:var(--label-secondary);font-variant-numeric:tabular-nums;white-space:nowrap;grid-area:status}.shelf-upload-track{border-radius:var(--radius-full);background-color:var(--fill-tertiary);grid-area:track;height:4px;overflow:hidden}.shelf-upload-bar{border-radius:var(--radius-full);background-color:var(--accent);height:100%;transition:width var(--duration-fast) var(--ease-out)}.book-card{gap:var(--space-2);min-width:0;color:inherit;flex-direction:column;display:flex;position:relative}.book-card-content{gap:var(--space-2);min-width:0;color:inherit;cursor:pointer;flex-direction:column;text-decoration:none;display:flex}.book-cover{aspect-ratio:2/3;border-radius:var(--radius-md);box-shadow:var(--shadow-card);transition:transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.book-card-content:hover .book-cover,.book-card--selectable:hover .book-cover{box-shadow:var(--shadow-elevated);transform:translateY(-3px)}.book-card--selectable{-webkit-user-select:none;user-select:none;outline:none}.book-card--selected .book-cover{box-shadow:0 0 0 3px var(--accent), var(--shadow-elevated)}.book-select-mark{top:var(--space-2);right:var(--space-2);z-index:1;background-color:color-mix(in srgb, var(--label) 14%, transparent);width:26px;height:26px;color:var(--on-accent,#fff);box-shadow:var(--shadow-card);border:2px solid #ffffffe6;border-radius:50%;justify-content:center;align-items:center;display:flex;position:absolute}.book-card--selected .book-select-mark{border-color:var(--accent);background-color:var(--accent)}.book-card-action{top:var(--space-2);right:var(--space-2);z-index:1;background-color:var(--material-bg);width:32px;height:32px;-webkit-backdrop-filter:var(--backdrop-blur-thin);backdrop-filter:var(--backdrop-blur-thin);color:var(--red);box-shadow:var(--shadow-card);cursor:pointer;opacity:0;transition:opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);border:none;border-radius:50%;justify-content:center;align-items:center;padding:0;display:flex;position:absolute;transform:scale(.92)}.book-card:hover .book-card-action,.book-card-action:focus-visible{opacity:1;transform:scale(1)}.book-cover-img{object-fit:cover;width:100%;height:100%;display:block}.book-cover-initial{font-family:var(--font-serif);font-size:52px;font-weight:var(--font-weight-semibold);color:#fffffff5;text-shadow:0 1px 2px #0003;-webkit-user-select:none;user-select:none}.book-format{top:var(--space-2);left:var(--space-2);padding:1px var(--space-1);border-radius:var(--radius-xs);-webkit-backdrop-filter:var(--backdrop-blur-thin);backdrop-filter:var(--backdrop-blur-thin);color:#fffffff2;font-size:var(--text-caption2);font-weight:var(--font-weight-semibold);letter-spacing:.06em;text-transform:uppercase;background-color:#ffffff3d;position:absolute}.book-title{font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);line-height:var(--leading-footnote);color:var(--label);text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}.book-author{font-size:var(--text-caption1);line-height:var(--leading-caption);color:var(--label-secondary);text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}.shelf-folder-card{gap:var(--space-2);min-width:0;color:inherit;flex-direction:column;display:flex;position:relative}.shelf-folder-card-button{gap:var(--space-2);min-width:0;color:inherit;text-align:left;cursor:pointer;background:0 0;border:none;flex-direction:column;padding:0;font-family:inherit;display:flex}.shelf-folder-card-cover{aspect-ratio:2/3;border-radius:var(--radius-md);border:.5px solid var(--separator);background:linear-gradient(135deg, var(--fill-secondary), var(--fill-tertiary));transition:transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);justify-content:center;align-items:center;display:flex;position:relative}.shelf-folder-card-button:hover .shelf-folder-card-cover{box-shadow:var(--shadow-elevated);transform:translateY(-3px)}.shelf-folder-card-glyph{border-radius:var(--radius-md);background-color:color-mix(in srgb, var(--accent) 14%, transparent);width:44px;height:44px;color:var(--accent);justify-content:center;align-items:center;display:flex}.shelf-folder-card-name{font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);line-height:var(--leading-footnote);color:var(--label);text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}.shelf-folder-card-count{font-size:var(--text-caption1);line-height:var(--leading-caption);color:var(--label-secondary);text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}.cover-tone-0{background:linear-gradient(150deg, var(--accent), var(--indigo))}.cover-tone-1{background:linear-gradient(150deg, var(--pink), var(--purple))}.cover-tone-2{background:linear-gradient(150deg, var(--orange), var(--red))}.cover-tone-3{background:linear-gradient(150deg, var(--teal), var(--accent))}.cover-tone-4{background:linear-gradient(150deg, var(--green), var(--teal))}.cover-tone-5{background:linear-gradient(150deg, var(--indigo), var(--purple))}.cover-tone-6{background:linear-gradient(150deg, var(--yellow), var(--orange))}.tree-label{padding:var(--space-2) var(--space-4);font-size:var(--text-footnote);font-weight:var(--font-weight-semibold);letter-spacing:.06em;text-transform:uppercase;color:var(--label-secondary);justify-content:space-between;align-items:center;display:flex}.tree-row{align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);margin:0 var(--space-2);border-radius:var(--radius-md);color:var(--label);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);display:flex}.tree-row:hover{background-color:var(--fill-quaternary)}.tree-row--active{background-color:var(--accent);color:var(--on-accent,#fff)}.tree-row--active:hover{background-color:var(--accent)}.tree-row--active .tree-count{color:#ffffffb3}.tree-chevron{border-radius:var(--radius-xs);width:20px;height:20px;color:var(--label-tertiary);transition:transform var(--duration-normal) var(--ease-in-out);flex-shrink:0;justify-content:center;align-items:center;display:flex}.tree-chevron--open{transform:rotate(90deg)}.tree-chevron--leaf{visibility:hidden}.tree-name{min-width:0;font-size:var(--text-subheadline);line-height:var(--leading-footnote);text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.tree-count{font-size:var(--text-caption1);color:var(--label-tertiary);flex-shrink:0}.tree-delete{border-radius:var(--radius-xs);width:22px;height:22px;color:var(--label-tertiary);cursor:pointer;opacity:0;transition:opacity var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;padding:0;display:flex}.tree-row:hover .tree-delete{opacity:1}.tree-row--active .tree-delete{color:#ffffffd9}.tree-delete:hover{color:var(--red)}.tree-row--active .tree-delete:hover{color:var(--on-accent,#fff)}.tree-new-btn{align-items:center;gap:var(--space-2);width:calc(100% - var(--space-4));margin:var(--space-2) var(--space-2) 0;padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);color:var(--accent);font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);cursor:pointer;text-align:left;transition:background-color var(--duration-fast) var(--ease-out);background:0 0;border:none;font-family:inherit;display:flex}.tree-new-btn:hover{background-color:var(--fill-quaternary)}.tree-new-form{gap:var(--space-2);margin:var(--space-2) var(--space-2) 0;display:flex}.tree-new-input{min-width:0;height:34px;padding:0 var(--space-3);border:1px solid var(--accent);border-radius:var(--radius-md);background-color:var(--surface);color:var(--label);font-size:var(--text-subheadline);outline:none;flex:1;font-family:inherit}.tree-new-submit{height:34px;padding:0 var(--space-3);border-radius:var(--radius-md);background-color:var(--accent);color:var(--on-accent,#fff);font-size:var(--text-footnote);font-weight:var(--font-weight-semibold);cursor:pointer;border:none;font-family:inherit}.tree-new-cancel{height:34px;padding:0 var(--space-2);border-radius:var(--radius-md);background-color:var(--fill-secondary);color:var(--label-secondary);font-size:var(--text-footnote);font-weight:var(--font-weight-medium);cursor:pointer;border:none;font-family:inherit}.tree-new-cancel:hover{background-color:var(--fill-tertiary);color:var(--label)}.shelf-empty{justify-content:center;align-items:center;gap:var(--space-3);padding:var(--space-16) var(--space-6);text-align:center;flex-direction:column;display:flex}.shelf-empty-icon{border-radius:var(--radius-2xl);background-color:var(--fill-tertiary);width:88px;height:88px;color:var(--label-secondary);justify-content:center;align-items:center;display:flex}.shelf-empty-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);text-wrap:balance;margin:0}.shelf-empty-hint{max-width:320px;font-size:var(--text-subheadline);line-height:var(--leading-body);color:var(--label-secondary);margin:0}.skeleton-grid{gap:var(--space-6) var(--space-5);grid-template-columns:repeat(auto-fill,minmax(140px,1fr));display:grid}.skeleton-card{gap:var(--space-2);flex-direction:column;display:flex}.skeleton-cover{aspect-ratio:2/3;border-radius:var(--radius-md);background-color:var(--fill-tertiary)}.skeleton-line{border-radius:var(--radius-xs);background-color:var(--fill-tertiary);height:12px}.skeleton-line--wide{width:78%}.skeleton-line--narrow{width:48%}.skeleton-shimmer{position:relative;overflow:hidden}.skeleton-shimmer:after{content:"";background:linear-gradient(90deg, transparent, var(--fill-quaternary), transparent);animation:shelf-shimmer 1.6s var(--ease-in-out) infinite;position:absolute;inset:0;transform:translate(-100%)}@keyframes shelf-shimmer{to{transform:translate(100%)}}.shelf-drop-overlay{z-index:var(--z-overlay);padding:var(--space-6);background-color:color-mix(in srgb, var(--accent) 18%, transparent);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.shelf-drop-panel{align-items:center;gap:var(--space-3);padding:var(--space-8) var(--space-12);border:2px dashed var(--accent);border-radius:var(--radius-2xl);background-color:var(--surface);box-shadow:var(--shadow-elevated);text-align:center;flex-direction:column;display:flex}.shelf-drop-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);text-wrap:balance;margin:0}.shelf-drop-hint{font-size:var(--text-subheadline);color:var(--label-secondary);margin:0}.shelf-toast{left:50%;bottom:var(--space-8);z-index:var(--z-toast);align-items:center;row-gap:var(--space-2);column-gap:var(--space-3);max-width:min(480px, calc(100vw - var(--space-8)));padding:var(--space-3) var(--space-4);border-radius:var(--radius-full);background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);border:.5px solid var(--separator);box-shadow:var(--shadow-elevated);color:var(--label);font-size:var(--text-subheadline);line-height:var(--leading-footnote);animation:shelf-toast-in var(--duration-normal) var(--ease-out);flex-wrap:wrap;display:flex;position:fixed;transform:translate(-50%)}.shelf-toast--error{border-color:color-mix(in srgb, var(--red) 40%, transparent)}.shelf-toast-icon{flex-shrink:0;justify-content:center;align-items:center;display:flex}.shelf-toast-actions{gap:var(--space-2);flex-shrink:0;margin-left:auto;display:flex}.shelf-toast-action{padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);background-color:var(--fill-secondary);color:var(--label);font-size:var(--text-footnote);font-weight:var(--font-weight-semibold);white-space:nowrap;cursor:pointer;border:none;font-family:inherit}.shelf-toast-action--primary{background-color:var(--accent);color:var(--on-accent,#fff)}@keyframes shelf-toast-in{0%{opacity:0;transform:translate(-50%,12px)}to{opacity:1;transform:translate(-50%)}}.book-delete-dialog{width:min(420px, calc(100vw - var(--space-8)));max-height:calc(100dvh - var(--space-8));border-radius:var(--radius-lg);background-color:var(--surface-elevated);color:var(--label);box-shadow:var(--shadow-elevated);border:none;margin:0;padding:0;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}.book-delete-dialog::backdrop{-webkit-backdrop-filter:var(--backdrop-blur-thin);backdrop-filter:var(--backdrop-blur-thin);background-color:#00000057}.book-delete-dialog-body{padding:var(--space-6);text-align:center;flex-direction:column;align-items:center;display:flex}.book-delete-symbol{width:48px;height:48px;margin-bottom:var(--space-4);background-color:color-mix(in srgb, var(--red) 14%, transparent);color:var(--red);font-size:var(--text-title2);font-weight:var(--font-weight-bold);font-variant-numeric:tabular-nums;border-radius:50%;justify-content:center;align-items:center;display:flex}.book-delete-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);text-wrap:balance;margin:0}.book-delete-message{margin:var(--space-2) 0 0;color:var(--label-secondary);font-size:var(--text-subheadline);line-height:var(--leading-body);text-wrap:pretty}.book-delete-list{width:100%;max-height:112px;margin:var(--space-4) 0 0;padding:var(--space-2) 0;border-top:.5px solid var(--separator);border-bottom:.5px solid var(--separator);color:var(--label-secondary);font-size:var(--text-footnote);list-style:none;overflow-y:auto}.book-delete-list li{padding:var(--space-1) var(--space-2);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.book-delete-actions{gap:var(--space-2);width:100%;margin-top:var(--space-5);grid-template-columns:1fr 1fr;display:grid}.book-delete-button{border-radius:var(--radius-md);background-color:var(--fill-secondary);min-height:44px;color:var(--label);font-size:var(--text-callout);font-weight:var(--font-weight-semibold);white-space:nowrap;cursor:pointer;border:none;font-family:inherit}.book-delete-button--danger{background-color:var(--red);color:var(--on-accent,#fff)}.book-delete-button:disabled{opacity:.5;cursor:default}.delete-folder-dialog{width:min(420px, calc(100vw - var(--space-8)));max-height:calc(100dvh - var(--space-8));border-radius:var(--radius-lg);background-color:var(--surface-elevated);color:var(--label);box-shadow:var(--shadow-elevated);border:none;margin:0;padding:0;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}.delete-folder-dialog::backdrop{-webkit-backdrop-filter:var(--backdrop-blur-thin);backdrop-filter:var(--backdrop-blur-thin);background-color:#00000075}.delete-folder-dialog-body{padding:var(--space-6);text-align:center;flex-direction:column;align-items:center;display:flex}.delete-folder-symbol{width:56px;height:56px;margin-bottom:var(--space-4);background-color:color-mix(in srgb, var(--red) 14%, transparent);color:var(--red);border-radius:50%;justify-content:center;align-items:center;display:flex}.delete-folder-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);text-wrap:balance;margin:0}.delete-folder-message{margin:var(--space-2) 0 0;color:var(--label-secondary);font-size:var(--text-subheadline);line-height:var(--leading-body);text-wrap:pretty}.delete-folder-meta{width:100%;margin:var(--space-4) 0 0;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background-color:var(--background-grouped);color:var(--label-secondary);font-size:var(--text-footnote);line-height:var(--leading-body);text-align:left;list-style:none}.delete-folder-meta li+li{margin-top:var(--space-1)}.delete-folder-meta b{color:var(--label);font-weight:var(--font-weight-semibold)}.delete-folder-actions{gap:var(--space-2);width:100%;margin-top:var(--space-5);grid-template-columns:1fr 1fr;display:grid}.delete-folder-button{border-radius:var(--radius-md);background-color:var(--fill-secondary);min-height:44px;color:var(--label);font-size:var(--text-callout);font-weight:var(--font-weight-semibold);white-space:nowrap;cursor:pointer;border:none;font-family:inherit}.delete-folder-button--danger{background-color:var(--red);color:var(--on-accent,#fff)}.delete-folder-button:disabled{opacity:.5;cursor:default}.move-books-dialog{width:min(440px, calc(100vw - var(--space-8)));max-height:calc(100dvh - var(--space-8));border-radius:var(--radius-lg);background-color:var(--surface-elevated);color:var(--label);box-shadow:var(--shadow-elevated);border:none;margin:0;padding:0;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}.move-books-dialog::backdrop{-webkit-backdrop-filter:var(--backdrop-blur-thin);backdrop-filter:var(--backdrop-blur-thin);background-color:#00000057}.move-books-dialog-body{padding:var(--space-6);flex-direction:column;display:flex}.move-books-dialog-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);text-wrap:balance;margin:0}.move-books-dialog-subtitle{margin:var(--space-1) 0 var(--space-4);color:var(--label-secondary);font-size:var(--text-subheadline);line-height:var(--leading-body);text-wrap:pretty}.move-folder-list{border:.5px solid var(--separator);border-radius:var(--radius-md);background-color:var(--background-grouped);flex-direction:column;max-height:280px;display:flex;overflow-y:auto}.move-folder-empty{padding:var(--space-4);color:var(--label-secondary);font-size:var(--text-footnote);text-align:center;margin:0}.move-folder-item{align-items:center;gap:var(--space-2);min-height:40px;padding:0 var(--space-3);border:none;border-bottom:.5px solid var(--separator);color:var(--label);font-size:var(--text-subheadline);text-align:left;cursor:pointer;background:0 0;font-family:inherit;display:flex}.move-folder-item:last-child{border-bottom:none}.move-folder-item svg{color:var(--label-tertiary);flex-shrink:0}.move-folder-item--active{background-color:var(--accent);color:var(--on-accent,#fff)}.move-folder-item--active svg{color:var(--on-accent,#fff)}.move-folder-name{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.move-folder-item:disabled{opacity:.6;cursor:default}.move-folder-new-btn{align-items:center;gap:var(--space-2);margin-top:var(--space-3);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);color:var(--accent);font-size:var(--text-subheadline);font-weight:var(--font-weight-medium);cursor:pointer;text-align:left;background:0 0;border:none;font-family:inherit;display:flex}.move-folder-new-btn:hover{background-color:var(--fill-quaternary)}.move-folder-new{gap:var(--space-2);margin-top:var(--space-3);display:flex}.move-folder-input{min-width:0;height:36px;padding:0 var(--space-3);border:1px solid var(--accent);border-radius:var(--radius-md);background-color:var(--surface);color:var(--label);font-size:var(--text-subheadline);outline:none;flex:1;font-family:inherit}.move-folder-submit{height:36px;padding:0 var(--space-3);border-radius:var(--radius-md);background-color:var(--accent);color:var(--on-accent,#fff);font-size:var(--text-footnote);font-weight:var(--font-weight-semibold);cursor:pointer;border:none;font-family:inherit}.move-folder-cancel{height:36px;padding:0 var(--space-2);border-radius:var(--radius-md);background-color:var(--fill-secondary);color:var(--label-secondary);font-size:var(--text-footnote);font-weight:var(--font-weight-medium);cursor:pointer;border:none;font-family:inherit}.move-folder-error{margin:var(--space-2) 0 0;color:var(--red);font-size:var(--text-footnote)}.move-books-dialog-actions{gap:var(--space-2);width:100%;margin-top:var(--space-5);grid-template-columns:1fr 1fr;display:grid}.move-books-button{border-radius:var(--radius-md);background-color:var(--fill-secondary);min-height:44px;color:var(--label);font-size:var(--text-callout);font-weight:var(--font-weight-semibold);white-space:nowrap;cursor:pointer;border:none;font-family:inherit}.move-books-button--primary{background-color:var(--accent);color:var(--on-accent,#fff)}.move-books-button:disabled{opacity:.5;cursor:default}@media (width<=860px){.shelf-sidebar{display:none}.shelf-chips{display:flex}.shelf-main,.shelf-header{padding-left:var(--space-4);padding-right:var(--space-4)}.shelf-search-input{width:100%}.shelf-search{flex:1}.shelf-titlebar{align-items:center}.shelf-sort-label{display:none}.shelf-management-bar{right:var(--space-3);bottom:calc(var(--space-3) + env(safe-area-inset-bottom,0px));left:var(--space-3);z-index:var(--z-nav);min-height:60px;padding:var(--space-2) var(--space-3);border:.5px solid var(--separator);border-radius:var(--radius-lg);background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);box-shadow:var(--shadow-elevated);position:fixed}.shelf--managing .shelf-main{padding-bottom:calc(var(--space-24) + env(safe-area-inset-bottom,0px))}}@media (hover:none){.book-card-action{opacity:1;transform:scale(1)}}@media (prefers-reduced-motion:reduce){.skeleton-shimmer:after,.shelf-toast,.shelf-sort-menu{animation:none}}.reader{background-color:var(--background);--reader-topbar-h:56px;--reader-bottombar-h:88px;--reader-location-h:24px;--reader-top-safe:env(safe-area-inset-top,0px);--reader-bottom-safe:env(safe-area-inset-bottom,0px);position:fixed;inset:0;overflow:hidden}.reader-view{position:absolute;inset:0;width:auto!important;height:auto!important}.reader--chrome .reader-view{top:calc(var(--reader-topbar-h) + var(--reader-top-safe));bottom:calc(var(--reader-bottombar-h) + var(--reader-location-h) + var(--reader-bottom-safe) + var(--space-1))}.reader-render-error{z-index:var(--z-overlay);justify-content:center;align-items:center;gap:var(--space-3);padding:var(--space-6);background:var(--background);color:var(--label-secondary);text-align:center;flex-direction:column;display:flex;position:absolute;inset:0}.reader-render-error p{max-width:320px;font-size:var(--text-subheadline);line-height:var(--leading-body);margin:0}.reader-topbar{height:calc(var(--reader-topbar-h) + var(--reader-top-safe));padding-top:var(--reader-top-safe);align-items:center;gap:var(--space-2);padding-inline:var(--space-2);border-bottom:.5px solid var(--separator);transition:transform var(--duration-normal) var(--ease-out), opacity var(--duration-normal) var(--ease-out);display:flex;position:absolute;top:0;left:0;right:0}.reader-topbar-title{text-align:center;font-size:var(--text-callout);font-weight:var(--font-weight-semibold);color:var(--label);text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.reader-bottombar{min-height:calc(var(--reader-bottombar-h) + var(--reader-bottom-safe));padding-bottom:var(--reader-bottom-safe);padding-inline:var(--space-2);align-items:center;gap:var(--space-2);border-top:.5px solid var(--separator);transition:transform var(--duration-normal) var(--ease-out), opacity var(--duration-normal) var(--ease-out);display:flex;position:absolute;bottom:0;left:0;right:0}.reader-location{left:0;right:0;bottom:calc(var(--reader-bottombar-h) + var(--reader-bottom-safe) + var(--space-1));min-height:var(--reader-location-h);justify-content:space-between;align-items:center;gap:var(--space-3);padding-inline:var(--space-5);font-size:var(--text-caption2);color:var(--label-secondary);pointer-events:none;transition:transform var(--duration-normal) var(--ease-out), opacity var(--duration-normal) var(--ease-out);display:flex;position:absolute}.reader-location-chapter{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.reader-location-remaining{font-variant-numeric:tabular-nums;flex-shrink:0}.reader-bar-btn{min-width:56px;min-height:48px;padding:var(--space-1) var(--space-2);border-radius:var(--radius-md);color:var(--label);font-size:var(--text-caption1);font-family:var(--font-sans);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);background:0 0;border:none;flex-direction:column;justify-content:center;align-items:center;gap:3px;display:flex}.reader-bar-btn:active{background-color:var(--fill-quaternary)}@media (width<=520px){.reader{--reader-bottombar-h:80px}.reader-bottombar{gap:var(--space-1);padding-inline:var(--space-1)}.reader-bar-btn{min-width:48px;padding-inline:var(--space-1);font-size:var(--text-caption2)}.reader-progress-wrap{gap:var(--space-1)}}.reader-icon-btn{border-radius:var(--radius-full);width:44px;height:44px;color:var(--label);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.reader-icon-btn:active{background-color:var(--fill-quaternary)}.reader-progress-wrap{align-items:center;gap:var(--space-3);flex:1;min-width:0;display:flex}.reader-progress{appearance:none;cursor:pointer;background:0 0;flex:1;min-width:0;height:32px;margin:0}.reader-progress::-webkit-slider-runnable-track{border-radius:var(--radius-full);background:linear-gradient(to right, var(--accent) var(--progress,0%), var(--fill) var(--progress,0%));height:3px}.reader-progress::-webkit-slider-thumb{-webkit-appearance:none;background:var(--knob);border:.5px solid var(--separator);width:16px;height:16px;box-shadow:var(--shadow-card);border-radius:50%;margin-top:-6.5px}.reader-progress::-moz-range-track{border-radius:var(--radius-full);background:var(--fill);height:3px}.reader-progress::-moz-range-progress{border-radius:var(--radius-full);background:var(--accent);height:3px}.reader-progress::-moz-range-thumb{border:.5px solid var(--separator);background:var(--knob);width:16px;height:16px;box-shadow:var(--shadow-card);border-radius:50%}.reader-progress-percent{text-align:right;min-width:3ch;font-size:var(--text-footnote);font-variant-numeric:tabular-nums;color:var(--label-secondary);flex-shrink:0}.reader-grabber{bottom:calc(var(--reader-bottom-safe) + var(--space-2));border-radius:var(--radius-full);background:var(--fill-tertiary);cursor:pointer;opacity:0;pointer-events:none;width:44px;height:16px;transition:opacity var(--duration-normal) var(--ease-out), background-color var(--duration-fast) var(--ease-out);border:none;position:absolute;left:50%;transform:translate(-50%)}.reader-grabber:after{content:"";border-radius:var(--radius-full);background:var(--label-tertiary);width:24px;height:4px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.reader-grabber:active{background:var(--fill)}.reader:not(.reader--chrome) .reader-topbar{transform:translateY(calc(-1 * var(--reader-topbar-h) - var(--reader-top-safe)));opacity:0;pointer-events:none}.reader:not(.reader--chrome) .reader-bottombar{transform:translateY(calc(var(--reader-bottombar-h) + var(--reader-bottom-safe)));opacity:0;pointer-events:none}.reader:not(.reader--chrome) .reader-location{transform:translateY(calc(var(--reader-bottombar-h) + var(--reader-bottom-safe)));opacity:0}.reader:not(.reader--chrome) .reader-grabber{opacity:1;pointer-events:auto}.reader-scrim{opacity:0;pointer-events:none;transition:opacity var(--duration-normal) var(--ease-out);z-index:var(--z-overlay);background:#00000052;position:absolute;inset:0}.reader-scrim--open{opacity:1;pointer-events:auto}.reader-toc{background-color:var(--material-bg);width:min(320px,84vw);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);border-right:.5px solid var(--separator);transition:transform var(--duration-slow) var(--ease-out);flex-direction:column;display:flex;position:absolute;top:0;bottom:0;left:0;transform:translate(-100%)}.reader-toc--open{transform:translate(0)}.reader-toc-header{padding:var(--space-4);padding-top:calc(var(--reader-top-safe) + var(--space-4));border-bottom:.5px solid var(--separator);justify-content:space-between;align-items:center;display:flex}.reader-toc-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);margin:0}.reader-toc-list{padding-block:var(--space-2);overscroll-behavior:contain;flex:1;overflow-y:auto}.reader-toc-item{align-items:center;gap:var(--space-2);width:100%;min-height:44px;padding-top:var(--space-1);padding-bottom:var(--space-1);padding-right:var(--space-4);text-align:left;cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out);background:0 0;border:none;display:flex}.reader-toc-item:active{background-color:var(--fill-quaternary)}.reader-toc-label{font-size:var(--text-subheadline);color:var(--label);text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.reader-toc-item--active .reader-toc-label{color:var(--accent);font-weight:var(--font-weight-semibold)}.reader-toc-dot{background:var(--accent);border-radius:50%;flex-shrink:0;width:6px;height:6px}.reader-toc-empty{justify-content:center;align-items:center;gap:var(--space-3);color:var(--label-tertiary);font-size:var(--text-footnote);flex-direction:column;flex:1;display:flex}.reader-toc-footer{align-items:center;gap:var(--space-3);padding:var(--space-4);padding-bottom:calc(var(--reader-bottom-safe) + var(--space-4));border-top:.5px solid var(--separator);display:flex}.reader-toc-progress-track{border-radius:var(--radius-full);background:var(--fill);flex:1;height:3px;overflow:hidden}.reader-toc-progress-fill{border-radius:var(--radius-full);background:var(--accent);height:100%}.reader-toc-progress-label{font-size:var(--text-caption1);color:var(--label-secondary);font-variant-numeric:tabular-nums}.reader-settings{border-radius:var(--radius-2xl) var(--radius-2xl) 0 0;background-color:var(--material-bg);-webkit-backdrop-filter:var(--backdrop-blur-thick);backdrop-filter:var(--backdrop-blur-thick);border-top:.5px solid var(--separator);transition:transform var(--duration-slow) var(--ease-out);position:absolute;bottom:0;left:0;right:0;overflow:hidden;transform:translateY(100%)}.reader-settings--open{transform:translateY(0)}.reader-sheet-handle{width:36px;height:5px;margin:var(--space-2) auto 0;border-radius:var(--radius-full);background:var(--fill)}.reader-settings-header{padding:var(--space-2) var(--space-4);justify-content:space-between;align-items:center;display:flex}.reader-settings-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);margin:0}.reader-settings-body{padding:var(--space-2) var(--space-4);padding-bottom:calc(var(--reader-bottom-safe) + var(--space-6));gap:var(--space-4);flex-direction:column;display:flex}.reader-setting{gap:var(--space-2);flex-direction:column;display:flex}.reader-setting-label{font-size:var(--text-footnote);color:var(--label-secondary)}.reader-slider-row{align-items:center;gap:var(--space-3);display:flex}.reader-slider-min,.reader-slider-max{font-size:var(--text-footnote);color:var(--label-tertiary)}.reader-slider-max{font-size:var(--text-title3);color:var(--label-secondary)}.reader-slider{appearance:none;cursor:pointer;background:0 0;flex:1;height:32px;margin:0}.reader-slider--full{width:100%}.reader-slider::-webkit-slider-runnable-track{border-radius:var(--radius-full);background:var(--fill);height:4px}.reader-slider::-webkit-slider-thumb{-webkit-appearance:none;background:var(--knob);border:.5px solid var(--separator);width:26px;height:26px;box-shadow:var(--shadow-card);border-radius:50%;margin-top:-11px}.reader-slider::-moz-range-track{border-radius:var(--radius-full);background:var(--fill);height:4px}.reader-slider::-moz-range-thumb{border:.5px solid var(--separator);background:var(--knob);width:26px;height:26px;box-shadow:var(--shadow-card);border-radius:50%}.reader-segmented{border-radius:var(--radius-md);background:var(--fill-secondary);padding:2px;display:flex}.reader-segmented-item{border-radius:calc(var(--radius-md) - 2px);min-height:36px;color:var(--label);font-size:var(--text-subheadline);font-family:var(--font-sans);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);background:0 0;border:none;flex:1}.reader-segmented-item--active{background:var(--surface-elevated);box-shadow:var(--shadow-card);font-weight:var(--font-weight-semibold)}.reader-center{justify-content:center;align-items:center;gap:var(--space-3);padding:var(--space-6);background-color:var(--background);color:var(--label-tertiary);flex-direction:column;display:flex;position:fixed;inset:0}.reader-center--muted{color:var(--label-secondary);font-size:var(--text-subheadline)}.reader-center-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);color:var(--label);margin:0}.reader-center-hint{font-size:var(--text-footnote);color:var(--label-secondary);margin:0}.reader-spinner{border:3px solid var(--fill-secondary);border-top-color:var(--accent);border-radius:var(--radius-full);width:28px;height:28px;animation:.8s linear infinite reader-spin}@keyframes reader-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.reader-spinner{animation-duration:2s}}.reader-open-progress{align-items:center;gap:var(--space-3);width:min(280px,70vw);display:flex}.reader-open-progress-track{border-radius:var(--radius-full);background:var(--fill-tertiary);flex:1;height:4px;overflow:hidden}.reader-open-progress-fill{border-radius:var(--radius-full);background:var(--accent);height:100%;transition:width var(--duration-fast) var(--ease-out)}.reader-open-progress-label{text-align:right;min-width:3ch;font-size:var(--text-footnote);font-variant-numeric:tabular-nums;color:var(--label-secondary);flex-shrink:0}.reader-back-btn{margin-top:var(--space-2);min-height:44px;padding-inline:var(--space-5);border-radius:var(--radius-md);background:var(--accent);color:#fff;font-size:var(--text-callout);font-family:var(--font-sans);font-weight:var(--font-weight-semibold);cursor:pointer;border:none}.reader-back-btn:active{opacity:.85}.reader-bar-btn:focus-visible,.reader-icon-btn:focus-visible,.reader-grabber:focus-visible,.reader-toc-item:focus-visible,.reader-segmented-item:focus-visible,.reader-back-btn:focus-visible,.reader-progress:focus-visible,.reader-slider:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.error-boundary{justify-content:center;align-items:center;gap:var(--space-4);padding:var(--space-6);background-color:var(--background);color:var(--label);text-align:center;flex-direction:column;display:flex;position:fixed;inset:0}.error-boundary-icon{color:var(--label-secondary)}.error-boundary-title{font-size:var(--text-title3);font-weight:var(--font-weight-semibold);line-height:var(--leading-title3);margin:0}.error-boundary-hint{max-width:32ch;color:var(--label-secondary);font-size:var(--text-callout);margin:0}.error-boundary-reload{margin-top:var(--space-2);min-height:44px;padding-inline:var(--space-5);border-radius:var(--radius-md);background-color:var(--accent);color:var(--on-accent,#fff);font-size:var(--text-callout);cursor:pointer;border:none}.error-boundary-detail{margin:var(--space-4) 0 0;max-width:100%;max-height:30vh;padding:var(--space-3);border-radius:var(--radius-md);background-color:var(--surface-elevated);color:var(--label-secondary);font-family:var(--font-mono);font-size:var(--text-footnote);text-align:left;white-space:pre-wrap;overflow:auto}