:root{
  --bg:#FBFBF8;--paper:#fff;--teal:#0C3B47;--teal2:#1D7A8C;--ink:#14171A;
  --mut:#6B6F6A;--rule:#E3E5DE;--soft:#F2F3ED;--red:#B3392B;
  --sans:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
:focus-visible{outline:2px solid var(--teal2);outline-offset:2px}
/* Skip link: off-screen until it takes focus, then it floats over the header.
   White on teal, not teal on teal — same colour as the bar made it look like the
   brand had been clipped rather than like a control sitting on top. */
.skip{position:absolute;left:12px;top:-56px;z-index:100;background:#fff;color:var(--teal);
  font-family:var(--sans);font-size:13px;font-weight:500;padding:10px 18px;border:none;
  box-shadow:0 2px 10px rgba(20,23,26,.28);transition:top .12s}
.skip:focus{top:10px}
/* The skip target is a landmark, not a control; a ring around the whole page helps nobody. */
main{padding-top:36px;padding-bottom:64px}
main:focus,main:focus-visible{outline:none}
html{-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65}
img{max-width:100%}
a{color:var(--teal2);text-decoration:none;border-bottom:1px solid rgba(29,122,140,.35)}
a:hover{border-bottom-color:var(--teal2)}


.fig{max-width:1040px;margin:0 auto;padding:0 24px}
.wide{max-width:1180px;margin:0 auto;padding:0 24px}

/* header */
header{background:var(--teal);height:58px;display:flex;align-items:center}
header .in{max-width:1040px;margin:0 auto;padding:0 24px;width:100%;display:flex;align-items:center;justify-content:space-between}
.brand{color:#fff;font-size:17px;font-weight:500;letter-spacing:.01em;border:none}
.brand:hover{border:none}
.brand span{font-weight:400;opacity:.62;font-size:12.5px;margin-left:12px;letter-spacing:.02em}
header nav{display:flex;gap:24px}
header nav a{color:#9FBFC6;font-size:11px;letter-spacing:.16em;text-transform:uppercase;border:none;padding-bottom:2px}
header nav a:hover{color:#fff}
header nav a.on{color:#fff;border-bottom:1px solid #fff}


@media (max-width:640px){}


.kicker{font-size:12.5px;color:var(--mut);margin:40px 0 6px}
h1{font-size:30px;line-height:1.22;letter-spacing:-.015em;font-weight:700;margin-bottom:16px}
h1.ph{font-size:22px;line-height:1.4;letter-spacing:0;font-weight:600;margin:0 0 16px}
.lede{font-size:16.5px;line-height:1.65;color:#3D423F;margin-bottom:10px;max-width:64ch;text-wrap:pretty}
.byline{font-size:13px;color:var(--mut);border-top:1px solid var(--rule);padding-top:12px;margin:20px 0 26px}
h2{font-size:24px;line-height:1.3;letter-spacing:-.01em;color:var(--ink);font-weight:500;margin:64px 0 20px}
h2 + .sub{font-size:15px;line-height:1.6;color:#3D423F;margin:-10px 0 22px;max-width:58ch}
h3.sh{font-size:13px;color:var(--mut);font-weight:500;margin-bottom:8px}

p.body{font-size:16px;margin-bottom:16px;text-wrap:pretty}
p.body + p.body{margin-top:-4px}
.cap{font-size:12.5px;color:var(--mut);line-height:1.6;margin-top:10px;text-wrap:pretty}
.cap b{color:var(--ink);font-weight:500}

/* ask box */
.ask{margin-top:26px;background:var(--paper);border:1px solid var(--rule)}
.ask .hd{display:flex;justify-content:space-between;align-items:baseline;padding:12px 18px;border-bottom:1px solid var(--rule)}
.ask .hd b{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);font-weight:500}
.ask .hd span{font-size:12px;color:var(--mut)}
.ask .bd{display:flex;align-items:center;padding:14px 18px;gap:12px}
.ask input{flex:1;border:none;font-family:var(--mono);font-size:14px;padding:8px 0;outline:none;background:transparent;min-width:0}
.ask:focus-within{outline:2px solid var(--teal2);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.ask .bd button{background:var(--teal);color:#fff;border:none;font-family:var(--sans);font-size:14px;padding:11px 26px;cursor:pointer;font-weight:500;white-space:nowrap}
.ask .bd button:hover{background:var(--teal2)}
.ask .ft{padding:0 18px 14px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.ask .ft .lb{font-size:11px;letter-spacing:.12em;color:var(--mut);text-transform:uppercase;margin-right:4px}
.samp{font-family:var(--mono);font-size:11.5px;color:var(--teal2);background:none;border:none;border-bottom:1px dotted #B9C6C6;cursor:pointer;padding:0 0 1px;margin-right:16px}
.samp:hover{color:var(--teal)}
.samp.on{color:var(--ink);border-bottom:1px solid var(--ink)}

.ask .ft .live{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--mut);white-space:nowrap}


.ask{position:relative;overflow:hidden}
.ask > *{position:relative;z-index:1}
.ask .fillbar{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:var(--teal);opacity:0;transform:scaleX(0);transform-origin:left center;
  transition:opacity .18s linear;will-change:transform}
.ask.busy .fillbar{opacity:.085}

/* result figure */
.res{position:relative;margin:40px 0 0;display:grid;grid-template-columns:1fr 400px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.res .left{padding:22px 28px 22px 0;border-right:1px solid var(--rule);display:flex;align-items:center;justify-content:center;min-height:280px}
.res .left img{max-height:250px}
.res .left .nomol{display:none;font-family:var(--mono);font-size:11.5px;color:var(--mut)}
.res .left.bad img{display:none}
.res .left.bad .nomol{display:block}
.res .right{padding:22px 0 22px 28px}

.res .left,.res .right{transition:opacity .18s linear}
.res.busy .left,.res.busy .right{opacity:.3}
.resline{position:absolute;left:0;right:0;top:-1px;height:2px;overflow:hidden;
  pointer-events:none;opacity:0;transition:opacity .18s linear}
.res.busy .resline{opacity:1}
.resline i{display:block;height:100%;background:var(--teal2);transform:scaleX(0);
  transform-origin:left center;will-change:transform}


.selfcheck{grid-column:1/-1;border-top:1px solid var(--rule);padding:16px 0 10px;
  transition:opacity .18s linear}
.res.busy .selfcheck{opacity:.3}
.sc-hd{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:6px}
.sc-hd b{font-size:13px;font-weight:600}
.sc-hd span{font-size:12px;color:var(--mut)}
.sc-row{display:grid;grid-template-columns:172px 1fr 268px;align-items:center;gap:18px;padding:5px 0}
.sc-k{font-size:13px;color:var(--mut);white-space:nowrap}
.sc-k b{font-family:var(--mono);font-size:13px;color:var(--ink);font-weight:500;
  font-variant-numeric:tabular-nums;margin-left:4px}
.sc-strip{position:relative;height:30px;display:flex;align-items:flex-end;gap:1px;
  cursor:crosshair;border-bottom:1px solid var(--rule)}
.sc-strip i{flex:1;background:#CBD4D0;min-height:1px}
.sc-strip i.hot{background:var(--teal2)}
.sc-strip i:hover{background:var(--teal2)}
.sc-strip .mark{position:absolute;top:-4px;bottom:-4px;width:1px;background:var(--teal);pointer-events:none}
.sc-strip .mark::before{content:'';position:absolute;top:-3px;left:-2.5px;width:6px;height:6px;
  border-radius:50%;background:var(--teal)}
.sc-strip:focus-visible{outline:2px solid var(--teal2);outline-offset:3px}
.sc-v{font-size:12.5px;color:var(--ink)}
.sc-v em{font-style:normal;color:var(--mut)}
.sc-v .warn{color:var(--red)}
.big{font-family:var(--mono);font-size:64px;line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.dec{display:inline-block;margin-top:10px;font-size:13px;padding:3px 9px;border:1px solid currentColor;color:var(--teal2);font-weight:500}
.dec.no{color:var(--mut)}
.res p.note{font-size:13.5px;color:#3D423F;margin-top:14px;line-height:1.6}
.axis{margin-top:18px}
.axisbar{position:relative;height:8px;background:#E9EBE5}
.axisbar .fill{position:absolute;left:0;top:0;bottom:0;background:var(--teal2)}
.axisbar .thr{position:absolute;top:-7px;bottom:-7px;width:1px;background:var(--red)}
.axisbar .seeds{position:absolute;inset:0;pointer-events:none}
.axisbar .seeds i{position:absolute;top:50%;width:7px;height:7px;margin:-3.5px 0 0 -3.5px;border-radius:50%;background:#fff;border:1px solid var(--teal2);box-sizing:border-box}
.axl{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10.5px;color:var(--mut);margin-top:7px}
.axl .t{color:var(--red)}
.kv{margin-top:18px;border-top:1px solid var(--rule)}
.kv div{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px solid var(--rule);font-size:12.5px}
.kv div span{color:var(--mut)}
.kv div b{font-family:var(--mono);font-weight:500;font-size:12.5px}


.aside{margin:26px 0;font-size:14.5px;line-height:1.68;color:#3D423F;max-width:60ch}
.aside b{font-weight:500;color:var(--ink)}

/* histogram */
.hist{display:flex;align-items:flex-end;gap:2px;height:170px;border-bottom:1px solid var(--ink)}
.hist .b{flex:1;display:flex;flex-direction:column;justify-content:flex-end;height:100%}
.hist .neg{background:#D7DAD2}
.hist .pos{background:var(--teal2)}
.histx{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10.5px;color:var(--mut);margin-top:6px}


.histwrap,.prwrap{position:relative}
.hist .b{cursor:crosshair}
.hist:focus-visible,.prwrap svg:focus-visible{outline:2px solid var(--teal2);outline-offset:3px}
.thr{position:absolute;top:0;bottom:0;width:1px;background:rgba(179,57,43,.55);pointer-events:none}
.thr span{position:absolute;top:0;left:4px;font-family:var(--mono);font-size:10px;color:#B3392B;
  background:var(--bg);padding:1px 3px;line-height:1.3;white-space:nowrap}
.tip{position:absolute;z-index:6;left:0;top:0;pointer-events:none;background:var(--ink);color:#fff;
  font-size:11.5px;line-height:1.55;padding:7px 10px;white-space:nowrap;opacity:0;
  transition:opacity .1s;transform:translate(-50%,0)}
.tip.on{opacity:1}
.tip b{font-family:var(--mono);font-weight:500}
.tip em{font-style:normal;color:#AEBDBB}

/* tables */

.tw{overflow-x:auto;max-width:100%}
table.b{width:100%;border-collapse:collapse;font-size:13px;margin-top:6px}
table.b th{text-align:left;font-weight:500;color:var(--mut);font-size:11px;letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid var(--ink);padding:0 10px 7px 0;white-space:nowrap}
table.b td{padding:8px 10px 8px 0;border-bottom:1px solid var(--rule);font-family:var(--mono);font-size:12.5px}
table.b td.n{text-align:right;padding-right:0}

table.b td.n + td,table.b th.n + th{padding-left:12px}
table.b td.smi{max-width:560px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}


.tbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:16px 0 4px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;background:none;border:1px solid var(--rule);
  color:#3D423F;font-family:var(--sans);font-size:12.5px;padding:5px 10px;cursor:pointer;line-height:1.4}
.chip:hover{border-color:var(--teal2);color:var(--teal2)}
.chip i{font-family:var(--mono);font-size:11px;font-style:normal;color:var(--mut)}
.chip.on{background:var(--teal);border-color:var(--teal);color:#fff}
.chip.on i{color:rgba(255,255,255,.72)}
.thint{font-size:11.5px;color:var(--mut)}
th.srt{cursor:pointer;user-select:none}
th.srt::after{content:"↕";margin-left:5px;font-size:10px;opacity:.45}
th.srt[aria-sort="descending"]::after{content:"↓";opacity:1;color:var(--teal2)}
th.srt[aria-sort="ascending"]::after{content:"↑";opacity:1;color:var(--teal2)}
th.srt:hover{color:var(--ink)}
table.b tr.row{cursor:pointer}
table.b tr.row:focus-visible{outline:2px solid var(--teal2);outline-offset:-2px}
table.b tr.row.open td{background:#F4F5F0;border-bottom-color:transparent}
table.b tr.dtl td{padding:0 0 14px;border-bottom:1px solid var(--rule)}
.dwrap{display:grid;grid-template-columns:240px 1fr;gap:28px;align-items:start;
  padding:16px 18px;background:#F7F8F4;border-left:2px solid var(--teal2)}
.dfig{display:flex;align-items:center;justify-content:center;min-height:120px;background:var(--paper)}
.dfig img{max-height:150px;max-width:100%}
.dmeta{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 28px;font-size:12.5px}
.dmeta div{display:flex;flex-direction:column;gap:2px}
.dmeta span{font-size:11px;color:var(--mut)}
.dmeta b{font-family:var(--mono);font-weight:400;color:var(--ink);word-break:break-all}
.dmeta .dsmi{grid-column:1 / -1}
@media (max-width:640px){
  
  .tip{white-space:normal;max-width:180px;font-size:11px;line-height:1.5}
  
  table.b tr.dtl td{position:sticky;left:0}
  .dwrap{grid-template-columns:1fr;gap:14px;padding:14px;max-width:calc(100vw - 48px)}
  .dmeta{grid-template-columns:1fr}
}
table.b tr:hover td{background:#F4F5F0}
table.b tr.best td{background:#EDF3F4;font-weight:500}
table.b tr.best:hover td{background:#E6EFF0}
table.b td.txt{font-family:var(--sans);font-size:13px}
.cnt{font-family:var(--sans)!important;font-variant-numeric:tabular-nums}
.pos{color:var(--teal2);font-weight:500}
.neg{color:var(--mut)}

/* stats band */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--rule);margin-top:26px}
.stat{padding:16px 18px 16px 0;border-right:1px solid var(--rule)}
.stat:last-child{border-right:none;padding-right:0}
.stat .k{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--mut)}
.stat .v{font-family:var(--sans);font-variant-numeric:tabular-nums;font-size:30px;line-height:1.2;letter-spacing:-.015em;margin-top:2px}
.stat .s{font-size:11.5px;color:var(--mut)}

/* tabs */
.tabs{display:flex;border-bottom:1px solid var(--rule);margin-bottom:16px}
.tab{background:none;border:none;border-bottom:2px solid transparent;font-family:var(--sans);font-size:13.5px;color:var(--mut);padding:9px 18px 9px 0;margin-right:8px;cursor:pointer}
.tab.on{color:var(--teal);border-bottom-color:var(--teal);font-weight:500}

/* drop zone */
.drop{position:relative;overflow:hidden;border:1px dashed #C9CEC5;background:var(--paper);padding:30px 24px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.drop > *{position:relative;z-index:1}
.drop:hover{border-color:var(--teal2)}
.drop .acts{display:flex;justify-content:center;margin-top:20px}
.drop .demo{background:none;border:1px solid var(--rule);color:var(--ink);font-family:var(--sans);font-size:12.5px;
  padding:8px 16px;cursor:pointer;transition:border-color .15s,color .15s}
.drop .demo:hover{border-color:var(--teal2);color:var(--teal2)}
.drop.over{border-style:solid;border-color:var(--teal2);background:#F4F6F2}
.drop .t{font-size:16px;margin-bottom:6px}
.drop .s{font-size:12.5px;color:var(--mut)}
.drop .mono{font-family:var(--mono);font-size:11.5px;color:var(--mut);margin-top:10px}

/* live state */

.drop .fillbar{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:var(--teal);opacity:0;transform:scaleX(0);transform-origin:left center;
  transition:opacity .2s linear,transform .45s linear;will-change:transform}
.drop.busy .fillbar{opacity:.1}

.drop.indet .fillbar{opacity:0}
.drop.indet::before{content:'';position:absolute;top:0;bottom:0;left:0;width:32%;
  z-index:0;pointer-events:none;
  
  background:linear-gradient(90deg,rgba(12,59,71,0) 0%,rgba(12,59,71,.11) 28%,
    rgba(12,59,71,.11) 72%,rgba(12,59,71,0) 100%);
  animation:sweep 1.2s linear infinite}
@keyframes sweep{0%{transform:translateX(-100%)}100%{transform:translateX(357%)}}

.drop.done .fillbar{opacity:.16;transform:scaleX(1)}
@media (prefers-reduced-motion:reduce){
  .drop.indet::before{animation:none;width:100%;opacity:.05}
  .drop .fillbar{transition:opacity .2s linear}
}
.pct{font-family:var(--mono);font-size:11.5px;color:var(--mut);margin-top:9px}
.pct .sd{display:inline-block;white-space:nowrap;margin-left:10px;color:var(--mut)}
.domline{font-family:var(--mono);font-size:11.5px;color:var(--mut);margin-top:6px;line-height:1.6}
.domline i{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:6px;vertical-align:1px}
.domline i.in_domain{background:var(--teal2)}
.domline i.borderline{background:#C98A22}
.domline i.out_of_domain{background:var(--red)}
.expl{font-family:var(--mono);font-size:11.5px;color:var(--mut);line-height:1.8;margin-top:12px}
.expl b{font-weight:500;color:#3D423F}
.kv.off{display:none}
.dl{display:inline-block;margin-top:14px;font-size:12.5px;font-family:var(--mono)}

.drop.busy{pointer-events:none}
.drop.busy .t,.drop.busy .s,.drop.busy .mono,.drop.busy .acts{opacity:.45}
.ask.busy{pointer-events:none}

/* scroll hint */
.swipe{display:none}

/* legend */
.lg{display:flex;gap:26px;font-size:12px;color:#3D423F;margin-top:10px;flex-wrap:wrap}
.lg i{display:inline-block;width:26px;height:0;border-top-width:2px;border-top-style:solid;margin-right:8px;vertical-align:3px}

/* misc */
.split{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.pill{display:inline-block;font-size:11px;border:1px solid var(--rule);padding:1px 7px;color:var(--mut);font-family:var(--mono)}

@media (max-width:900px){
  h1{font-size:26px}
  h1.ph{font-size:20px}
  h2{font-size:21px}
  
  .fig{overflow-x:auto}
  .fig table.b{width:max-content;min-width:100%}
  .res{grid-template-columns:1fr}
  .res .right{order:1;padding-left:0;padding-bottom:6px}
  .res .left{order:2;border-right:none;border-top:1px solid var(--rule);padding:18px 0 0;min-height:0}
  .split{grid-template-columns:1fr;gap:24px}
  .stats{grid-template-columns:1fr 1fr}
  .stat{border-bottom:1px solid var(--rule)}
  .big{font-size:52px}
  
  .sc-row{grid-template-columns:1fr;gap:5px;padding:8px 0}
  .sc-hd{flex-direction:column;align-items:flex-start;gap:2px}
}
@media (max-width:640px){
  header{height:auto;padding:10px 0;position:relative}
  header .in{flex-direction:column;align-items:flex-start;gap:8px;padding-right:54px}
  
  
  header nav{gap:16px;flex-wrap:wrap}
  .brand span{display:none}
  h1{font-size:24px}
  h1.ph{font-size:19px;margin-bottom:14px}
  .lede{font-size:16px}
  .ask .bd{flex-wrap:wrap}
  .ask .bd button{width:100%}
  .big{font-size:48px}
  table.b td.smi{max-width:150px}
  table.b{width:max-content;min-width:100%}
  table.b td.n{white-space:nowrap}
  .fig{overflow-x:auto}
  .swipe{display:block;font-size:11.5px;color:var(--mut);margin:-4px 0 10px}
  .fig>h2,.fig>.sub,.fig>.cap,.fig>.lg{min-width:0}
}