:root{
  --paper:#f6f4ef;
  --panel:#fbfaf7;
  --panel2:#f0ede6;
  --ink:#1d2026;
  --ink-dim:#79736a;
  --gold:#a9771f;
  --gold-soft:rgba(169,119,31,.18);
  --cyan:#237a6b;
  --rose:#b3402f;
  --line:rgba(29,32,38,.10);
  --mono:'IBM Plex Mono',ui-monospace,Consolas,monospace;
  --serif:'Instrument Serif','Noto Serif SC',serif;
  --sans:'Noto Sans SC',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{height:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);height:100dvh;overflow:hidden;line-height:1.6}
body::before{content:'';position:fixed;inset:0;pointer-events:none;z-index:99;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.04'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
body::after{content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(1200px 700px at 70% -10%,rgba(169,119,31,.06),transparent 60%),radial-gradient(900px 600px at 8% 110%,rgba(35,122,107,.06),transparent 60%);}

.app{position:relative;z-index:2;height:100dvh;display:grid;grid-template-rows:auto 1fr auto;
  gap:clamp(8px,1.4vh,16px);padding:clamp(12px,2vh,22px) clamp(16px,3vw,40px) clamp(8px,1.6vh,14px);}

/* header */
header{display:flex;justify-content:space-between;align-items:flex-end;gap:clamp(16px,3vw,44px);flex-wrap:wrap}
h1{font-family:var(--serif);font-weight:900;font-size:clamp(22px,3.2vh,40px);line-height:1.05;letter-spacing:.02em}
h1 .en{display:block;font-family:var(--serif);font-style:italic;font-weight:400;font-size:.4em;letter-spacing:.14em;color:var(--gold);margin-top:4px;text-transform:uppercase}
.lede{max-width:580px;color:var(--ink-dim);font-size:clamp(10.5px,1.55vh,13px);padding-bottom:2px;line-height:1.7}
.lede b{color:var(--ink);font-weight:500}

/* main two columns fill the row */
main{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(300px,.95fr);gap:clamp(10px,1.4vw,18px);min-height:0}
@media(max-width:900px){main{grid-template-columns:1fr;grid-template-rows:minmax(0,1.4fr) minmax(0,1fr)}}
.stage{position:relative;min-height:0;min-width:0;overflow:hidden}
#scatter{width:100%;height:100%;display:block;aspect-ratio:unset;border-radius:3px;background:
  radial-gradient(120% 100% at 50% 0%,#fffefb 0%,var(--panel) 55%,#f2efe7 100%);
  border:1px solid var(--line);box-shadow:0 24px 60px -30px rgba(29,32,38,.25)}
.stage-tag{position:absolute;top:12px;left:14px;font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--ink-dim);text-transform:uppercase;pointer-events:none}
.stage-tag em{font-style:normal;color:var(--gold)}
/* 全屏展示嵌入空间(课堂投影) */
.stage:fullscreen{background:var(--paper);padding:clamp(14px,3vh,30px)}
.stage:fullscreen #scatter{box-shadow:none}
.word-filter{position:absolute;top:12px;right:14px;z-index:6;width:190px;background:rgba(255,253,248,.92);border:1px solid var(--line);border-radius:2px;padding:5px 9px;font-family:var(--mono);font-size:10.5px;color:var(--ink);outline:none}
.word-filter:focus{border-color:var(--gold-soft)}
.word-filter::placeholder{color:var(--ink-dim);opacity:.7}
.stage-ctl{position:absolute;bottom:10px;right:14px;z-index:6;display:flex;align-items:center;gap:8px}
/* 家族图例:点击切换该类词的显示/隐藏 */
.fam-legend{position:absolute;bottom:10px;left:14px;z-index:6;display:flex;flex-direction:column;gap:4px;max-height:58%;overflow-y:auto;padding-right:2px}
.fam-legend::-webkit-scrollbar{width:3px}
.fam-legend::-webkit-scrollbar-thumb{background:var(--gold-soft)}
.fam-chip{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10px;letter-spacing:.05em;color:var(--ink);padding:3px 8px 3px 6px;border:1px solid var(--line);background:rgba(255,253,248,.92);border-radius:2px;cursor:pointer;user-select:none;transition:all .12s;white-space:nowrap}
.fam-chip i{width:8px;height:8px;border-radius:50%;flex:0 0 auto}
.fam-chip em{font-style:normal;color:var(--ink-dim);font-size:9px}
.fam-chip:hover{border-color:var(--gold)}
.fam-chip.off{opacity:.42}
.fam-chip.off i{background:transparent!important;box-shadow:inset 0 0 0 1.5px var(--ink-dim)}
.mini{font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;padding:4px 10px;border:1px solid var(--line);background:rgba(255,253,248,.92);color:var(--ink-dim);border-radius:2px;cursor:pointer;transition:all .12s}
.mini:hover{color:var(--gold);border-color:var(--gold);transform:none;box-shadow:none}
.mini.on{color:var(--gold);border-color:var(--gold-soft);background:var(--panel2)}
.view-hint{font-family:var(--mono);font-size:9px;color:var(--ink-dim);opacity:.8}
.dim-sel{font-family:var(--mono);font-size:10.5px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:2px;padding:4px 6px;margin-top:4px;outline:none;cursor:pointer}
.dim-sel:focus{border-color:var(--gold-soft)}
#tooltip{position:absolute;pointer-events:none;z-index:5;opacity:0;transition:opacity .15s;
  background:#fffdf8;border:1px solid var(--gold-soft);border-radius:3px;
  padding:7px 11px;font-family:var(--mono);font-size:11.5px;box-shadow:0 10px 30px rgba(29,32,38,.14)}
#tooltip .tw-word{font-family:var(--sans);font-weight:700;font-size:14px;color:var(--gold)}
#tooltip .tw-line{color:var(--ink-dim);font-size:10.5px;margin-top:2px;line-height:1.5}

/* right column */
.side{display:flex;flex-direction:column;gap:clamp(8px,1.4vh,14px);min-height:0;overflow-y:auto;padding-right:4px}
.side::-webkit-scrollbar{width:4px}
.side::-webkit-scrollbar-thumb{background:var(--gold-soft);border-radius:2px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:12px 16px;box-shadow:0 12px 30px -20px rgba(29,32,38,.18)}
.card h3{font-family:var(--mono);font-weight:500;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.card h3::after{content:'';flex:1;height:1px;background:var(--line)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line)}
.metric{background:var(--panel2);padding:9px 12px}
.metric .v{font-family:var(--mono);font-size:clamp(13px,2.1vh,18px);color:var(--gold);font-weight:500}
.metric .k{font-size:9.5px;color:var(--ink-dim);letter-spacing:.06em;margin-top:1px}
#loss{display:block;width:100%;background:var(--panel);border:none;border-top:1px solid var(--line);height:clamp(70px,13vh,110px)}
#sample{flex:0 0 auto}
.sample-sent{font-size:clamp(13px,2.2vh,16px);line-height:2}
.sample-sent b{font-weight:500}
.sample-sent .ctx{color:var(--ink-dim)}
.p-high{color:var(--cyan)}
.p-mid{color:var(--ink)}
.p-low{color:var(--ink-dim);opacity:.5}
.sample-meta{font-family:var(--mono);font-size:10.5px;color:var(--ink-dim);margin-top:8px;line-height:1.6}
.sample-meta em{font-style:normal;color:var(--gold)}
.flash{animation:flash .5s ease}
@keyframes flash{0%{opacity:.2;transform:translateY(4px)}100%{opacity:1;transform:none}}
.ctl-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.ctl-row:last-child{margin-bottom:0}
button{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;cursor:pointer;background:var(--gold);color:#fdfaf3;border:none;padding:9px 20px;border-radius:2px;transition:transform .12s,box-shadow .12s;font-weight:500}
button:hover{transform:translateY(-1px);box-shadow:0 6px 18px -6px rgba(169,119,31,.5)}
button.ghost{background:transparent;color:var(--ink-dim);border:1px solid var(--line);padding:9px 16px}
button.ghost:hover{color:var(--gold);border-color:var(--gold-soft);box-shadow:none}
label.slider{flex:1;display:flex;flex-direction:column;gap:5px;font-family:var(--mono);font-size:10px;color:var(--ink-dim);letter-spacing:.08em}
input[type=range]{-webkit-appearance:none;appearance:none;height:2px;background:var(--line);outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 3px var(--gold-soft)}
.ctl-val{color:var(--gold);float:right}
.hist-info{font-family:var(--mono);font-size:9.5px;color:var(--ink-dim);letter-spacing:.05em;white-space:nowrap;padding-left:4px}
.ctl-hint{font-family:var(--mono);font-size:9px;color:var(--ink-dim);letter-spacing:.05em;opacity:.75;margin:-2px 0 10px}

/* similarity search */
.sim-query{display:flex;gap:8px}
.sim-query input{flex:1;min-width:0;background:#fff;border:1px solid var(--line);border-radius:2px;padding:8px 10px;font-family:var(--sans);font-size:12.5px;color:var(--ink);outline:none}
.sim-query input:focus{border-color:var(--gold-soft)}
.sim-query button{padding:8px 16px;flex:0 0 auto}
.sim-hint{font-family:var(--mono);font-size:9.5px;color:var(--ink-dim);margin:8px 0 6px;min-height:14px}
.sim-item{padding:7px 9px;border-radius:3px;margin-bottom:4px;background:var(--panel2)}
.sim-text{font-size:12px;color:var(--ink);line-height:1.5;word-break:break-all}
.sim-bar-row{display:flex;align-items:center;gap:8px;margin-top:4px}
.sim-bar{flex:1;height:3px;background:var(--line);border-radius:2px;overflow:hidden}
.sim-bar i{display:block;height:100%;background:var(--cyan)}
.sim-score{font-family:var(--mono);font-size:10px;color:var(--cyan);white-space:nowrap}

/* smart extract pane */
.ed-pane{flex:1;min-height:0;display:flex;flex-direction:column}
.ed-smart-ctl{display:flex;align-items:center;gap:12px;margin-top:8px}
.ed-smart-ctl label{display:flex;align-items:center;gap:6px;margin:0;font-family:var(--mono);font-size:10px;color:var(--ink-dim)}
.ed-smart-ctl input[type=number]{width:64px;background:#fff;border:1px solid var(--line);border-radius:2px;padding:5px 8px;font-family:var(--mono);font-size:11px;color:var(--ink);outline:none}
.ed-smart-ctl input[type=number]:focus{border-color:var(--gold-soft)}
.ed-preview{flex:1;min-height:56px;overflow-y:auto;margin-top:10px;padding-right:4px}
.ed-preview::-webkit-scrollbar{width:3px}
.ed-preview::-webkit-scrollbar-thumb{background:var(--gold-soft)}
.file-btn{font-family:var(--mono);font-size:10.5px;color:var(--ink-dim);border:1px solid var(--line);border-radius:2px;padding:6px 14px;cursor:pointer;background:#fff;transition:all .12s}
.file-btn:hover{color:var(--gold);border-color:var(--gold)}
.file-info{font-family:var(--mono);font-size:9.5px;color:var(--ink-dim)}
.ed-progress{height:3px;background:var(--line);border-radius:2px;overflow:hidden;margin-top:8px}
.ed-progress-bar{height:100%;width:0;background:var(--gold);transition:width .15s}

/* footer */
footer{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;font-family:var(--mono);font-size:10px;color:var(--ink-dim);letter-spacing:.08em}
footer p{font-size:10.5px;max-width:700px;line-height:1.65;font-family:var(--sans);letter-spacing:0}
footer b{color:var(--gold);font-weight:500}
#vocabToggle{position:relative;display:flex;gap:8px;flex:0 0 auto}
#vocabPop{position:absolute;bottom:calc(100% + 10px);right:0;z-index:20;width:min(460px,80vw);max-height:46vh;overflow-y:auto;
  background:#fffdf8;border:1px solid var(--line);border-radius:4px;padding:14px;box-shadow:0 30px 60px -20px rgba(29,32,38,.3);display:none}
#vocabPop.open{display:block}
#vocabPop .sec-label{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--gold);text-transform:uppercase;margin-bottom:8px}
.vocab{display:flex;flex-wrap:wrap;gap:5px}
.chip{font-size:11.5px;color:var(--ink-dim);border:1px solid var(--line);padding:1px 8px;border-radius:2px;cursor:pointer;transition:all .12s;user-select:none;background:#fff}
.chip:hover{color:var(--gold);border-color:var(--gold)}
.pop-tabs{display:flex;gap:6px;margin-bottom:10px}
.pop-tab{font-family:var(--mono);font-size:10px;letter-spacing:.1em;padding:5px 12px;border:1px solid var(--line);background:#fff;color:var(--ink-dim);cursor:pointer;border-radius:2px}
.pop-tab.on{color:var(--gold);border-color:var(--gold-soft);background:var(--panel2)}
.fam-group{margin-bottom:9px}
.fam-name{font-family:var(--mono);font-size:9.5px;letter-spacing:.15em;margin-bottom:4px}
.corpus-list{max-height:calc(46vh - 100px);overflow-y:auto;font-family:var(--mono);font-size:11px;line-height:1.9;padding-right:6px}
.corpus-list::-webkit-scrollbar{width:3px}
.corpus-list::-webkit-scrollbar-thumb{background:var(--gold-soft)}
.sent{padding:1px 8px;border-radius:2px;cursor:pointer;color:var(--ink-dim);white-space:nowrap}
.sent:hover{background:var(--panel2);color:var(--ink)}
.sent b{color:var(--gold);font-weight:500;margin-right:7px}

/* edit modal */
.modal{position:fixed;inset:0;z-index:50;background:rgba(29,32,38,.38);display:none;align-items:center;justify-content:center;padding:20px}
.modal.open{display:flex}
.modal-box{background:var(--panel);border:1px solid var(--line);border-radius:5px;width:min(820px,94vw);height:min(84vh,720px);display:flex;flex-direction:column;padding:18px 20px;box-shadow:0 50px 100px -40px rgba(29,32,38,.5)}
.modal-box h3{font-family:var(--mono);font-weight:500;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:12px;display:flex;align-items:center;gap:8px}
.modal-box h3::after{content:'';flex:1;height:1px;background:var(--line)}
.ed-row{display:flex;gap:14px;flex:1;min-height:0}
.ed-col{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}
.ed-col label{font-family:var(--mono);font-size:10px;color:var(--ink-dim);letter-spacing:.06em;margin-bottom:6px}
.ed-col label em{font-style:normal;color:var(--gold)}
.ed-col textarea{flex:1;min-height:0;resize:none;background:#fff;border:1px solid var(--line);border-radius:3px;padding:9px 11px;font-family:var(--mono);font-size:12px;line-height:1.8;color:var(--ink);outline:none}
.ed-col textarea:focus{border-color:var(--gold-soft)}
.ed-hint{font-size:10px;color:var(--ink-dim);margin:10px 0 2px;font-family:var(--sans)}
.ed-msg{font-family:var(--mono);font-size:11px;color:var(--rose);min-height:18px;margin:4px 0}
.ed-actions{display:flex;gap:10px;justify-content:flex-end}