:root{--demo-bg:#e8eae6;--demo-paper:#f7f8f5;--demo-ink:#202622;--demo-muted:#788079;--demo-line:#d4d8d2;--demo-soft:#eceeea;--demo-accent:#766f9f;font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:var(--demo-ink);background:var(--demo-bg);line-height:1.5}*{box-sizing:border-box}body{margin:0}button,textarea{font:inherit}textarea{display:block;width:100%;-moz-appearance:none;appearance:none;-webkit-appearance:none}button{cursor:pointer}main{max-width:1240px;margin:auto;padding:24px 28px 70px}header{display:flex;justify-content:space-between;border-bottom:1px solid var(--demo-line);padding-bottom:15px;font-size:12px;letter-spacing:.08em}header span{color:var(--demo-muted)}a{color:inherit}.hero{padding:70px 0 45px;display:flex;justify-content:space-between;gap:30px;align-items:end}.hero label,.panel>label,.panel-head label{font-size:10px;letter-spacing:.16em;color:var(--demo-muted)}.hero h1{font-size:clamp(44px,6vw,76px);line-height:.94;margin:12px 0 18px;letter-spacing:-.04em}.hero em{font-family:Georgia,serif;font-weight:400}.hero p{max-width:680px;font-size:18px;color:var(--demo-muted)}.stats{display:flex;gap:9px}.stats b{background:#f4f5f2;border:1px solid var(--demo-line);border-radius:14px;padding:15px 20px;font-size:23px;min-width:100px}.stats small{display:block;font-size:9px;text-transform:uppercase;letter-spacing:.1em;color:var(--demo-muted);font-weight:500}.grid{display:grid;grid-template-columns:300px 1fr;gap:14px}.lower{display:grid;grid-template-columns:1.05fr .95fr;gap:14px;margin-top:14px}.panel{background:var(--demo-paper);border:1px solid #d4d8d2;border-radius:16px;padding:20px}.panel h2{font-size:20px;margin:3px 0 18px}.panel-head{display:flex;justify-content:space-between;align-items:start;gap:10px}.panel-head button,.askbar button{-moz-appearance:none;appearance:none;-webkit-appearance:none;background:var(--demo-ink);color:#fff;border:1px solid var(--demo-ink);border-radius:999px;padding:11px 17px;font-size:12px;font-weight:600;line-height:1;letter-spacing:.01em;box-shadow:none;transition:background .15s ease,transform .15s ease}.panel-head button:hover,.askbar button:hover{background:#303833}.panel-head button:active,.askbar button:active{transform:translateY(1px)}.doc{width:100%;text-align:left;background:transparent;border:0;border-top:1px solid var(--demo-line);padding:14px 4px}.doc span,.doc small{display:block}.doc small{font-size:11px;color:var(--demo-muted);margin-top:3px}.upload-status{margin:0 0 10px;padding:9px 10px;border:1px solid var(--demo-line);border-radius:9px;background:var(--demo-soft);color:#59635c;font-size:11px;line-height:1.4}.subtle{background:none;border:0;color:var(--demo-muted);font-size:11px;margin-top:12px}.research textarea{display:block;width:100%;min-height:120px;resize:vertical;border:1px solid var(--demo-line);border-radius:12px;background:#fff;color:var(--demo-ink);padding:15px 16px;outline:none;line-height:1.55;box-shadow:none}.research textarea:focus{border-color:#8f978f;box-shadow:0 0 0 3px #766f9f1a}.askbar{display:flex;align-items:center;gap:12px;margin:12px 0 18px;min-height:34px}.askbar span,.muted{font-size:11px;color:var(--demo-muted)}.answer{border:1px solid var(--demo-line);border-radius:12px;padding:17px;background:#fff;margin-bottom:24px}.answer-meta{display:flex;justify-content:space-between;font-size:10px;letter-spacing:.1em;color:var(--demo-muted)}.answer-meta b{letter-spacing:0;color:var(--demo-ink)}.answer p{font-size:16px;margin:14px 0}.chips{display:flex;gap:6px;flex-wrap:wrap}.chips span{font:10px ui-monospace,monospace;background:var(--demo-soft);border-radius:20px;padding:4px 8px}.source{border-top:1px solid var(--demo-line);padding:14px 0}.source div{display:flex;justify-content:space-between}.source div span{font-size:11px}.source p{margin:7px 0;font-size:14px}.source small{font-size:10px;color:var(--demo-muted)}.history{border-top:1px solid var(--demo-line);padding:12px 0}.history b{font-size:12px}.history p{font-size:12px;color:var(--demo-muted);margin:5px 0}.trace{display:grid;min-height:1px}.trace:empty:before{content:"Run a question to inspect the retrieval path.";display:block;padding:16px 0;color:var(--demo-muted);font-size:12px}.trace-row{display:flex;align-items:flex-start;gap:12px;padding:13px 0;border-top:1px solid var(--demo-line)}.trace-row i{font:11px ui-monospace,monospace;color:#858d87}.trace-row small{display:block;color:var(--demo-muted);font-size:10px;margin-top:3px}.architecture{margin-top:14px;padding:12px;background:var(--demo-soft);border-radius:10px;font-size:11px}.architecture span{display:block;color:var(--demo-muted);margin-top:4px}footer{margin-top:28px;color:#7b837d;font-size:11px}.empty{padding:16px 0;color:var(--demo-muted);font-size:12px}@media(max-width:850px){.askbar{flex-wrap:wrap}.askbar span{width:100%}}@media(max-width:850px){.hero{display:block}.stats{margin-top:20px}.grid,.lower{grid-template-columns:1fr}}