:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:#191b20;background:#fafafa;font-size:14px;--line:#e5e6e9;--muted:#747984;--blue:#245bb4}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,.file-button{cursor:pointer;border:1px solid var(--line);border-radius:7px;background:#fff;color:inherit;padding:9px 13px}button:hover{background:#f0f3f8;border-color:#b5c7df}button:disabled{opacity:.45;cursor:wait}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #3579d0;outline-offset:2px}a{color:var(--blue);text-decoration:none}[hidden]{display:none!important}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);background:white;padding:0 28px;position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:8px;font-weight:750;color:#141518;font-size:16px}.brand small{display:block;font-size:8px;letter-spacing:1.8px;color:var(--muted)}.logo{font-size:26px}nav{display:flex;gap:5px}nav button{border:0;background:transparent;padding:10px 18px;color:var(--muted)}nav button.active{background:#17191d;color:#fff}.icon-button{border:0}main{max-width:1500px;margin:auto;padding:0 28px}.summary{display:flex;align-items:center;gap:20px;font-size:12px;color:var(--muted);padding:15px 0}.summary b{font-size:15px;color:#24262c}.summary small{margin-left:auto;font-size:11px}.study-tools{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:12px;margin:5px auto 12px;max-width:650px}#studyArea{max-width:650px;margin:auto}.welcome{text-align:center;padding:100px 18px 140px;border:1px solid var(--line);border-radius:12px;background:white}.welcome h1{font-size:25px;letter-spacing:-1px}.welcome p{color:var(--muted);font-size:13px}.study-card,.word-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:25px}.card-top{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:11px}.word-title{display:flex;align-items:center;gap:10px;margin-top:25px}.word-title h2{font-size:36px;letter-spacing:-1px;overflow-wrap:anywhere;margin:0;font-weight:650}.speak{border:0;color:var(--muted);padding:7px}.phonetic{color:var(--muted);margin:5px 0 22px;font-size:13px}.meaning{font-size:18px;font-weight:550;line-height:1.7;margin:16px 0}.part-strip{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin:16px 0}.part-chip{display:flex;flex-direction:column;align-items:flex-start;background:#f6f8fb;border-color:#dce5f0;max-width:100%;padding:9px 12px}.part-chip b{color:#244c83;font-size:17px}.part-chip small{font-size:12px;margin-top:5px;text-align:left;line-height:1.5}.plus{color:#959ba4;font-size:12px}.changes,.logic{font-size:13px;line-height:1.75;color:#545b66}.badge{display:inline-block;font-size:10px;border:1px solid var(--line);border-radius:4px;padding:3px 6px;color:#707680;margin:0 5px 5px 0}.badge.pending{background:#fff8df;color:#846200}.details{border-top:1px solid var(--line);padding-top:12px;margin-top:14px;font-size:12px;line-height:1.8;color:#656b75}.details summary{cursor:pointer}.details p{white-space:pre-line}.prompt{width:100%;border:0;background:#fafbfc;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#747984}.prompt small{font-size:11px;color:#949aa3}.answer-footer{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px;position:sticky;bottom:12px;background:#fff;padding-top:8px}.answer-footer button{min-height:48px;font-size:16px;font-weight:600}.answer-footer [data-grade="0"]{background:#fff5d5;border-color:#eed99b}.primary{background:#17191d;color:#fff;border-color:#17191d}.primary:hover{background:#294e81;color:#fff}.toolbar{display:flex;gap:8px;margin:5px 0 14px}.search{display:flex;align-items:center;flex:1;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0 12px;min-width:0}.search input{width:100%;min-width:0;border:0;background:transparent;outline:0;padding:12px 0}.toolbar select{border:1px solid var(--line);border-radius:7px;background:white;max-width:130px;padding:0 8px}.dictionary-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:20px}.word-results,.part-results{min-width:0;max-height:calc(100dvh - 220px);overflow:auto}.result-count{font-size:11px;color:var(--muted);padding:0 7px 9px}.result{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;padding:10px 9px}.result strong{font-size:14px;font-weight:600}.result small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted);font-size:11px;margin-top:5px}.result.active{background:#eaf1fc;border-radius:6px}.right{float:right;color:var(--muted);font-size:10px}.word-card .word-title{margin-top:12px}.word-card .word-title h2{font-size:30px}.complete-row{display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:14px;margin-top:14px;font-size:12px}input[type=checkbox]{accent-color:var(--blue)}.plain{background:transparent;border:0;font-size:12px}.full{width:100%}.note-input{width:100%;min-height:80px;padding:10px;border:1px solid var(--line);border-radius:6px;resize:vertical}.network-layout{display:grid;grid-template-columns:225px minmax(0,1fr);gap:15px}.network-pane{border:1px solid var(--line);border-radius:9px;background:#fff;min-width:0;overflow:hidden}.graph-bar{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}.graph-bar button{padding:4px 8px;font-size:11px}.graph-wrap{position:relative;height:calc(100dvh - 330px);min-height:380px}#graphCanvas{position:absolute;inset:0}#graphTooltip{pointer-events:none;position:absolute;max-width:240px;z-index:2;background:#191b20;color:white;border-radius:7px;padding:10px 12px;font-size:12px;line-height:1.6;white-space:pre-line;box-shadow:0 3px 15px #0002}.graph-legend{display:flex;gap:16px;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}.graph-legend span:before{content:'';display:inline-block;width:7px;height:7px;background:var(--dot);border-radius:50%;margin-right:5px}#networkDetail{padding:10px 14px;border-top:1px solid var(--line);font-size:12px;line-height:1.8}#networkDetail button{font-size:11px;padding:4px 8px;margin-left:6px}.family-words{display:flex;gap:6px;flex-wrap:wrap}.family-words button{font-size:12px}.family-words .known{background:#eaf1fc;color:#245bb4}.family-title{font-size:12px;margin:18px 0 10px}footer{display:flex;justify-content:space-between;gap:10px;color:#969ba4;font-size:10px;margin:25px 0 15px}.small{font-size:12px;color:var(--muted);line-height:1.8}dialog{width:min(620px,calc(100% - 28px));max-height:85dvh;border:1px solid var(--line);border-radius:14px;padding:23px;color:#222;background:white}dialog::backdrop{background:#1116}.modal-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.modal-top h2{font-size:18px;margin:0}.modal-top button{border:0}.backup-actions{display:flex;gap:8px}#sourceInfo{font-size:12px;line-height:1.8}#sourceInfo h3{font-size:14px;margin-top:24px}#toast{display:none;position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#181b22;color:white;padding:12px 18px;border-radius:8px;z-index:30;max-width:90%;font-size:12px}.empty{padding:30px;color:var(--muted)}
@media(max-width:700px){.topbar{padding:0 12px;height:55px;gap:7px}.brand{font-size:13px;gap:4px}.brand small{display:none}.logo{font-size:21px}nav{gap:1px}nav button{font-size:12px;padding:9px 11px}.icon-button{padding:8px}main{padding:0 12px}.summary{gap:14px;padding:13px 0;font-size:11px}.summary b{font-size:13px}.summary small{max-width:125px;font-size:9px}.study-tools{font-size:10px;margin-bottom:10px}.study-tools button{padding:7px 10px;font-size:11px}.study-card,.word-card{padding:19px 16px;border-radius:10px}.word-title h2{font-size:32px}.word-title{margin-top:27px}.meaning{font-size:16px}.part-chip{padding:8px 10px}.part-chip b{font-size:16px}.part-chip small{font-size:11px}.logic,.changes{font-size:12px}.prompt{min-height:250px}.answer-footer{bottom:10px;gap:10px}.welcome{padding:90px 12px 110px}.welcome h1{font-size:21px}.welcome p{font-size:11px}.toolbar{gap:6px}.toolbar select{max-width:100px;font-size:11px}.toolbar button{padding:8px;font-size:11px}.search{padding:0 9px}.search input{font-size:12px;padding:11px 0}.dictionary-layout{display:flex;flex-direction:column;gap:12px}.word-results{max-height:180px;border-bottom:1px solid var(--line)}.result{padding:9px}.result-count{font-size:10px}.complete-row{font-size:11px}.network-layout{grid-template-columns:1fr;gap:8px}.part-results{max-height:125px;display:block}.network-pane{border-radius:8px}.graph-wrap{height:55dvh;min-height:340px}.graph-bar{padding:8px;font-size:9px}.graph-legend{gap:10px;padding:10px;font-size:9px}.graph-bar button{font-size:10px;padding:4px 6px}#networkDetail{font-size:11px;padding:9px}footer{font-size:9px;line-height:1.7}footer span{max-width:220px}.details{font-size:11px}.phonetic{margin-bottom:20px}dialog{padding:18px}.word-card .word-title h2{font-size:27px}}

/* Fixed-height rows keep only the visible portion of the component index in the DOM. */
.network-layout{grid-template-columns:340px minmax(0,1fr)}
.part-results{display:flex;flex-direction:column;max-height:none;overflow:hidden;min-height:0}
#partResults{height:calc(100dvh - 265px);min-height:220px;overflow-y:auto;overflow-x:hidden;overflow-anchor:none}
#partResults .virtual-row{height:36px;display:flex;align-items:center;gap:9px;padding:0 8px;white-space:nowrap;border-radius:4px}
#partResults .virtual-row strong{flex:0 1 115px;min-width:45px;overflow:hidden;text-overflow:ellipsis;font-size:12px}
#partResults .virtual-row small{flex:1;min-width:0;margin:0;font-size:11px}
#partResults .row-count{flex:0 0 30px;text-align:right;font-size:10px;color:#747984;font-variant-numeric:tabular-nums}
.inline-clues .family-words{margin-top:9px}.inline-clues details{margin-top:8px;color:#747984;font-size:11px}.inline-clues summary{cursor:pointer}
@media(max-width:700px){.network-layout{grid-template-columns:1fr}.part-results{max-height:none}#partResults{height:144px;min-height:144px}#partResults .virtual-row strong{flex-basis:105px}}


.graph-hold{position:absolute;z-index:4;pointer-events:none;width:182px;padding:10px 12px;background:#191b20;color:#fff;border-radius:8px;box-shadow:0 3px 14px #0002;font-size:12px}.graph-hold span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hold-track{height:5px;margin-top:9px;background:#ffffff30;border-radius:4px;overflow:hidden}.hold-track i{display:block;width:100%;height:100%;background:#85b5eb;transform:scaleX(0);transform-origin:left;will-change:transform}

@media(max-width:700px){.summary{flex-wrap:wrap;gap:8px 12px}.summary small{margin-left:auto}}

.family-words button{position:relative;overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;touch-action:pan-y}
.family-words button::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:4px;background:#397bd0;transform:scaleX(var(--hold-progress,0));transform-origin:left;pointer-events:none}
.family-words button.holding{background:#eaf1fc;border-color:#85b5eb}


.dictionary-row{display:flex;align-items:center;gap:6px;border-bottom:1px solid var(--line);padding-right:6px;border-radius:6px}.dictionary-row.active{background:#eaf1fc}.dictionary-row .result{flex:1;min-width:0;border:0;background:transparent}.quick-remember{flex:none;min-width:56px;min-height:36px;padding:6px 8px;font-size:11px;color:#245bb4;border-color:#c8d8ee}.quick-remember.known{background:transparent;border-color:transparent;color:#747984;opacity:1;cursor:default}

.study-card .answer-footer{position:static;margin:0 0 20px;padding:0;bottom:auto}
.frequency-badge{display:inline-block;padding:3px 6px;border-radius:4px;font-size:10px;color:#666;background:#f1f2f4;margin:6px 0}.frequency-badge.high{color:#245bb4;background:#eaf1fc}.frequency-badge.medium{color:#846200;background:#fff5d5}.dictionary-row .frequency-badge{margin:0 0 0 5px;font-size:9px;padding:2px 4px}
.word-examples{margin:12px 0 16px;padding:10px 12px;border-left:2px solid #bdd3f2;background:#f7f9fc;font-size:14px;line-height:1.65;overflow-wrap:anywhere}
.word-examples>small,.empty-examples{color:#707780;font-size:11px}
.word-examples p{margin:5px 0}
.word-examples mark{color:#245bb4;background:#e5efff;font-weight:650;border-radius:2px;padding:0 2px}
.example-source{color:#76869c;text-decoration:none;font-size:11px}
.example-pair+.example-pair{margin-top:12px;padding-top:8px;border-top:1px solid #e5eaf1}.word-examples .example-zh{color:#646d79;font-size:13px;margin-top:2px}.example-credit{font-size:10px;color:#838b96}.example-credit summary{cursor:pointer}
.offline-tools{margin:14px 0;padding:12px;background:#f5f7fa;border-radius:7px;font-size:12px;line-height:1.7}.offline-tools p{margin:4px 0}.offline-tools button{margin:6px 6px 0 0}
.word-results{display:flex;flex-direction:column;max-height:none;overflow:hidden;min-height:0}
#wordResults{height:calc(100dvh - 255px);min-height:220px;overflow-y:auto;overflow-x:hidden;overflow-anchor:none}
#wordResults .dictionary-row{height:64px;overflow:hidden}
#wordResults .result{white-space:nowrap;overflow:hidden}
#wordResults .result strong{display:inline-block;max-width:calc(100% - 48px);overflow:hidden;text-overflow:ellipsis;vertical-align:middle}
#wordResults .result small{color:#dddddd;font-weight:400}
@media(max-width:700px){#wordResults{height:192px;min-height:192px}.word-results{max-height:none}}
.meaning{white-space:pre-line}.meaning-editor{margin:-8px 0 14px;font-size:12px;color:#747984}.meaning-editor summary{cursor:pointer;width:max-content}.meaning-editor textarea{display:block;width:100%;min-height:90px;margin:8px 0;color:#191b20;resize:vertical}.meaning-editor button{font-size:12px;margin-right:8px;padding:6px 10px}