:root{--bg:#0a0f1f;--panel:#111a33;--panel2:#16213f;--line:#243256;--tx:#e8eefc;--mut:#8fa0c4;--acc:#5ee0ff;--blue:#3b82f6;--red:#ef4444;--green:#22c55e}
@media (prefers-color-scheme:light){:root{--bg:#f3f6fc;--panel:#fff;--panel2:#eef2fb;--line:#d5deef;--tx:#101a33;--mut:#51628a;--acc:#0a7ea4}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100vh;
background-image:radial-gradient(900px 420px at 80% -80px,rgba(94,224,255,.12),transparent),radial-gradient(700px 380px at -10% 10%,rgba(59,130,246,.12),transparent)}
.top{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:14px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);z-index:5}
.brand{display:flex;gap:12px;align-items:center}
.brand b{font-size:18px;letter-spacing:.2px}.brand small{display:block;color:var(--mut);font-size:12px}
.glyph{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font:28px/1 Georgia,serif;color:var(--acc);background:var(--panel);border:1px solid var(--line)}
.engine{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--mut);min-width:0}
.engine .dot{width:9px;height:9px;border-radius:50%;background:#f59e0b;box-shadow:0 0 0 0 rgba(245,158,11,.6);animation:pulse 1.4s infinite}
.engine.ok .dot{background:var(--green);animation:none}.engine.bad .dot{background:var(--red);animation:none}
.bar{display:block;width:90px;height:4px;background:var(--line);border-radius:4px;overflow:hidden}.bar u{display:block;height:100%;width:0;background:var(--acc);transition:width .4s}
.engine.ok .bar{display:none}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(245,158,11,0)}100%{box-shadow:0 0 0 0 rgba(245,158,11,0)}}
main{max-width:1000px;margin:0 auto;padding:0 16px 60px}
.hero{padding:42px 0 22px}
.hero h1{font-size:clamp(28px,5.4vw,50px);line-height:1.1;margin:0 0 14px;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--acc),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--mut);max-width:70ch;margin:0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;margin:18px 0;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.card h2{margin:0 0 14px;font-size:19px}.card h2 small{font-weight:400;color:var(--mut);font-size:13px;margin-left:8px}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tab{background:var(--panel2);color:var(--tx);border:1px solid var(--line);padding:9px 14px;border-radius:999px;cursor:pointer;font:inherit;font-size:14px}
.tab.on{background:var(--acc);color:#04202b;border-color:var(--acc);font-weight:600}
.pane{display:none}.pane.on{display:block}
.drop{display:flex;flex-direction:column;gap:4px;align-items:center;text-align:center;padding:34px 16px;border:2px dashed var(--line);border-radius:14px;cursor:pointer;background:var(--panel2);transition:.2s}
.drop:hover,.drop.over{border-color:var(--acc);background:color-mix(in srgb,var(--acc) 8%,var(--panel2))}
.drop span{color:var(--mut);font-size:13px}
.scanbtns{margin-top:10px}
.camwrap{margin-top:12px}.camwrap video{width:100%;max-height:340px;border-radius:12px;background:#000}
.camrow{display:flex;gap:8px;margin-top:8px}
.preview{margin-top:14px;display:grid;gap:8px}.preview canvas{max-width:100%;max-height:260px;border-radius:10px;border:1px solid var(--line);background:#fff;justify-self:start}
.ocrstat{font-size:13px;color:var(--mut)}
.hint{color:var(--mut);font-size:14px;margin:12px 0}
code{background:var(--panel2);padding:1px 6px;border-radius:6px;font-size:.92em}
.free,.fields input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--tx);font:16px ui-monospace,Consolas,monospace}
.free{margin-bottom:10px}
.free:focus,.fields input:focus{outline:2px solid var(--acc);outline-offset:1px}
.btn{background:var(--acc);color:#04202b;border:0;border-radius:10px;padding:11px 16px;font-family:inherit;font-weight:600;font-size:15px;cursor:pointer}
.btn.ghost{background:var(--panel2);color:var(--tx);border:1px solid var(--line);font-weight:500}
.btn:disabled{opacity:.5;cursor:wait}.btn:hover:not(:disabled){filter:brightness(1.08)}
.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px}
.chip{display:block;text-align:left;background:var(--panel2);border:1px solid var(--line);color:var(--tx);border-radius:12px;padding:10px 12px;cursor:pointer;font:inherit}
.chip:hover{border-color:var(--acc)}.chip b{display:block;font-size:12px;color:var(--acc);margin-bottom:2px}.chip .katex{font-size:1em}
.fields{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin-top:18px;align-items:end}
.f label{display:block;font-size:12px;color:var(--mut);margin-bottom:4px}
.go{grid-column:1/-1;padding:14px;font-size:17px}
.live{margin-top:14px;text-align:center;min-height:44px;overflow-x:auto}
.err{margin-top:12px;padding:12px 14px;border-radius:10px;background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.5);font-size:14px}
.exact{font-size:clamp(20px,4vw,30px);text-align:center;padding:16px;background:var(--panel2);border-radius:12px;overflow-x:auto}
.steps{list-style:none;counter-reset:s;padding:0;margin:14px 0 0;display:grid;gap:10px}
.steps li{counter-increment:s;background:var(--panel2);border-radius:12px;padding:12px 14px 12px 46px;position:relative;overflow-x:auto}
.steps li::before{content:counter(s);position:absolute;left:12px;top:12px;width:24px;height:24px;border-radius:50%;background:var(--acc);color:#04202b;font-weight:700;display:grid;place-items:center;font-size:13px}
.steps li small{display:block;color:var(--mut);font-size:12px;margin-bottom:2px}
.ctrl{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:12px}
.ctrl label{font-size:14px;color:var(--mut)}.ctrl b{color:var(--tx)}
#nRange{flex:1;min-width:160px;accent-color:var(--acc)}
.seg{display:flex;flex-wrap:wrap;gap:6px}.seg button{background:var(--panel2);color:var(--tx);border:1px solid var(--line);border-radius:8px;padding:6px 10px;font:inherit;font-size:13px;cursor:pointer}.seg .on{background:var(--acc);color:#04202b;border-color:var(--acc)}
.plot{width:100%;height:380px;display:block;border-radius:12px;background:var(--panel2);border:1px solid var(--line)}.plot.short{height:320px}
.legend{display:flex;flex-wrap:wrap;gap:16px;margin-top:10px;font-size:13px;color:var(--mut)}
.l{display:inline-block;width:26px;height:0;border-top:3px solid;vertical-align:middle;margin-right:6px}
.l.blue{border-color:var(--blue);border-top-width:4px}.l.red{border-color:var(--red);border-top-style:dashed}.l.green{border-color:var(--green);border-top-style:dotted}.l.gray{border-color:#8fa0c4;border-top-width:1px;border-top-style:dashed}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:14px}
.kpi{background:var(--panel2);border-radius:12px;padding:12px 14px;border-left:4px solid var(--line)}
.kpi.r{border-color:var(--red)}.kpi.g{border-color:var(--green)}
.kpi small{color:var(--mut);display:block;font-size:12px}.kpi b{font:600 17px ui-monospace,Consolas,monospace}.kpi span{display:block;font:13px ui-monospace,Consolas,monospace;color:var(--mut)}
.tablewrap{overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:560px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:center;font-size:14px}th{background:var(--panel2);color:var(--mut);font-weight:600}
td.win{color:var(--green);font-weight:700}
.verdict{margin-top:14px;padding:14px 16px;border-radius:12px;background:var(--panel2);border-left:4px solid var(--acc);font-size:15px}
.verdict p{margin:0 0 8px}.verdict p:last-child{margin:0}
.codebar{display:flex;gap:8px;margin-bottom:10px}
.code{margin:0;padding:14px;border-radius:12px;background:#050914;color:#cfe3ff;overflow:auto;max-height:420px;font:13px/1.5 ui-monospace,Consolas,monospace;border:1px solid var(--line)}
footer{text-align:center;color:var(--mut);font-size:12px;padding:24px 16px 40px;border-top:1px solid var(--line)}
sup{font-size:.7em}
@media (max-width:640px){.fields{grid-template-columns:1fr 1fr}.fields .wide{grid-column:1/-1}.card{padding:16px}.top{padding:12px 14px}.plot{height:300px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}