/* 单元式题库：跟随当前主题，列表与编辑器同屏。 */
#libraryDialog.unit-library{width:min(980px,94vw);max-width:980px;height:min(730px,92dvh);max-height:92dvh;box-sizing:border-box;padding:22px 26px;border:3px solid white;border-radius:30px;overflow:hidden;background:linear-gradient(135deg,#fffdf5 15%,var(--page-b));grid-template-rows:auto auto auto minmax(0,1fr) auto;gap:12px}
#libraryDialog.unit-library[open]{display:grid}
.unit-library .dialog-header{margin:0}.unit-library .dialog-header h2{font-size:26px;margin:2px 0}.unit-library .dialog-header small{font-size:12px}.unit-library .icon-close{min-height:44px;width:44px;height:44px}
.unit-toolbar{display:flex;gap:10px;align-items:center}.unit-toolbar button,.unit-library button:not(.icon-close),.unit-library .sample-downloads a{font:700 14px/1.35 inherit;min-height:40px;border:0;border-radius:12px;padding:8px 12px;background:var(--soft);color:var(--accent-dark);cursor:pointer}
.unit-toolbar #inputOpen,.unit-toolbar #chooseWordFile,.unit-library #saveInputWords{background:var(--accent);color:white;box-shadow:0 3px 0 var(--accent-dark)}
.unit-toolbar #chooseWordFile{background:var(--accent-dark)}.unit-toolbar #libraryCount{margin-left:auto;font-size:12px;color:var(--ink)}
.unit-current{display:flex;align-items:center;gap:12px;background:#ffffffa6;border-radius:14px;padding:8px 12px}.unit-current select{border:1px solid var(--accent);border-radius:10px;background:#fffef8;color:var(--ink);padding:8px;font:inherit;font-size:14px;max-width:42%;min-height:40px}.unit-current span{font-size:12px;color:var(--accent-dark);overflow-wrap:anywhere}
.unit-workspace{display:grid;grid-template-columns:minmax(235px,.85fr) minmax(0,1.4fr);gap:16px;min-height:0}.unit-sidebar{display:flex;flex-direction:column;gap:9px;min-height:0}.unit-side-heading{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:14px}.unit-library .unit-side-heading button{padding:6px 9px;font-size:12px;min-height:36px}
#unitList{display:grid;grid-template-rows:repeat(4,minmax(0,1fr));gap:8px;flex:1;min-height:0}.unit-row{display:flex;align-items:center;gap:3px;border:2px solid #ffffffc9;background:#ffffff91;border-radius:15px;padding:3px;min-height:0}.unit-row.selected{border-color:var(--accent);background:var(--soft)}
.unit-library .unit-select{background:none;box-shadow:none;flex:1;min-width:0;text-align:left;padding:7px 8px;min-height:40px}.unit-select strong{display:block;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.unit-select small{display:block;font-size:11px;margin-top:3px;font-weight:500}.unit-row-actions{display:flex;flex-direction:column;gap:2px}.unit-library .unit-row-actions button{padding:3px 7px;min-height:27px;font-size:11px;background:#ffffffb3}.unit-row-actions button+button{color:#a7614c!important}
.unit-pagination{display:flex;justify-content:space-between;align-items:center;font-size:12px}.unit-library .unit-pagination button{min-height:32px;padding:4px 13px}.unit-library button:disabled{opacity:.4;cursor:default}
.unit-pane{min-height:0;display:flex;flex-direction:column;gap:9px;padding:15px;border:2px dashed var(--accent);border-radius:22px;background:var(--soft)}.unit-pane h3{margin:0;font-size:17px}.unit-hint{font-size:12px;margin:0;color:var(--accent-dark)}
.unit-pane .library-words{flex:1;min-height:0;grid-template-rows:repeat(3,minmax(0,1fr));gap:8px;margin:0}.unit-pane .library-words>div{background:#fffc;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:8px 10px;gap:3px;min-height:0}.unit-pane .library-words strong{font-size:18px;max-width:100%;overflow:hidden;text-overflow:ellipsis}.unit-pane .library-words span{font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.unit-pane .library-pages{margin:0;font-size:12px;gap:8px}.unit-pane .library-pages button{font-size:12px;min-height:34px}
.unit-editor-heading{display:flex;align-items:center;justify-content:space-between}.unit-library #fillWordExample{min-height:30px;padding:5px 9px;font-size:12px;background:#fff9}.unit-pane label{font-size:12px;font-weight:700}.unit-pane input,.unit-pane textarea{box-sizing:border-box;width:100%;border:2px solid #ffffff;border-radius:14px;background:#fffefc;color:var(--ink);font:inherit;outline-color:var(--accent)}
.unit-pane input{padding:10px 12px;min-height:43px;font-size:15px}.unit-pane textarea{flex:1;min-height:65px;height:auto;resize:none;padding:12px;font-size:15px;line-height:1.65;margin:0}.unit-pane #wordInputStatus{margin:0;font-size:11px;line-height:1.4;min-height:30px}.unit-editor-actions{display:flex;gap:10px;justify-content:flex-end}.unit-library #cancelUnit{background:white}.unit-footer{display:flex;align-items:center;gap:10px}.unit-footer .sample-downloads{display:flex;gap:8px;margin:0}.unit-footer .sample-downloads a{font-size:12px;min-height:36px;text-align:center;text-decoration:none;white-space:nowrap}.unit-footer>span{font-size:11px;margin-left:auto}.unit-library #openMistakes{font-size:12px;white-space:nowrap;min-height:36px}
@media(max-height:680px){#libraryDialog.unit-library{padding:13px 18px;gap:7px;height:95dvh;max-height:95dvh}.unit-library .dialog-header h2{font-size:22px}.unit-pane{padding:10px;gap:6px}.unit-pane input{min-height:37px;padding:7px 10px}.unit-pane textarea{min-height:45px;padding:8px}.unit-current{padding:4px 9px}.unit-toolbar button{min-height:36px!important}.unit-library .unit-footer>span{display:none}.unit-select small{font-size:10px}.unit-library .unit-row-actions button{min-height:23px}.unit-row{padding:1px}#unitList{gap:5px}}
@media(max-width:750px){#libraryDialog.unit-library{padding:16px;width:96vw}.unit-workspace{grid-template-columns:minmax(180px,.8fr) minmax(0,1fr);gap:9px}.unit-toolbar{flex-wrap:wrap}.unit-toolbar #libraryCount{font-size:11px}.unit-row{flex-wrap:wrap}.unit-row-actions{flex-direction:row}.unit-pane{padding:10px}.unit-current{flex-wrap:wrap;gap:5px}.unit-current select{max-width:100%}.unit-footer>span{display:none}.unit-footer{flex-wrap:wrap;gap:5px}.unit-pane .library-words{grid-template-columns:1fr;grid-template-rows:repeat(6,minmax(0,1fr))}.unit-pane .library-words>div{flex-direction:row;justify-content:space-between;align-items:center}.unit-library .unit-select{padding:3px 6px}}