:root{--ink:#070b16;--ink2:#0f172a;--muted:#5b6475;--line:#e3e8f0;--bg:#f6f8fb;--card:#fff;--teal:#0d9488;--teal2:#14b8a6;--violet:#7c3aed;--err:#b42318;--ok:#067647;
--grad:linear-gradient(135deg,var(--teal),var(--violet));--r:14px;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--ink2);line-height:1.55}
a{color:var(--violet)}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
:focus-visible{outline:3px solid var(--teal2);outline-offset:2px}
.top{--gut:clamp(16px,4vw,40px);display:flex;align-items:center;gap:12px;padding:12px max(var(--gut),calc((100% - 1280px)/2 + var(--gut)));background:var(--ink);color:#fff;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:700;letter-spacing:.2px}
.pill{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;padding:3px 10px;border-radius:99px;border:1px solid #ffffff33;color:#cbd5e1}
.back{margin-left:auto;color:#cbd5e1;text-decoration:none;font-size:14px}.back:hover{color:#fff}
.wrap{max-width:1280px;margin:0 auto;padding:28px clamp(16px,4vw,40px) 40px}
.intro h1{font-size:clamp(28px,4vw,42px);margin:0 0 8px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;width:fit-content}
.intro p{max-width:760px;margin:6px 0;color:var(--muted)}
.intro .privacy{max-width:none;background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46!important;padding:10px 14px;border-radius:10px;font-size:14px}
.grid{display:grid;grid-template-columns:minmax(300px,360px) 1fr;gap:20px;margin-top:22px}
@media(max-width:860px){.grid{grid-template-columns:1fr}}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:0 1px 2px #0f172a0d}
.panel h2{font-size:15px;margin:0 0 12px;color:var(--ink)}
.drop{display:flex;flex-direction:column;align-items:center;gap:4px;padding:22px 12px;border:2px dashed #c7d2e0;border-radius:12px;text-align:center;cursor:pointer;transition:.15s}
.drop:hover,.drop.over{border-color:var(--teal);background:#f0fdfa}.drop small{color:var(--muted)}
.msg{min-height:22px;font-size:14px;margin:8px 0}.msg.err{color:var(--err)}.msg.ok{color:var(--ok)}.msg.busy{color:var(--muted)}
.docs{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.docs li{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"ext name x" "ext meta x";gap:0 8px;align-items:center;padding:8px 10px;border:1px solid var(--line);border-radius:10px;font-size:14px}
.docs.muted li{background:#f8fafc;grid-template-areas:"ext name x"}
.ext{grid-area:ext;font:11px ui-monospace,Menlo,monospace;text-transform:uppercase;background:var(--ink);color:#fff;border-radius:6px;padding:2px 6px}
.name{grid-area:name;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.meta{grid-area:meta;color:var(--muted);font-size:12px}
.x{grid-area:x;border:0;background:none;font-size:20px;line-height:1;color:var(--muted);cursor:pointer;padding:4px 6px;border-radius:6px}.x:hover{background:#fee2e2;color:var(--err)}
.samples{margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.switch{display:flex;gap:8px;align-items:center;font-weight:600;cursor:pointer}.switch input{width:18px;height:18px;accent-color:var(--teal)}
.hint{font-size:13px;color:var(--muted);margin:6px 0 10px}.timer{font:13px ui-monospace,Menlo,monospace;color:var(--muted);margin:14px 0 0}
.chat{display:flex;flex-direction:column;min-height:560px}
.log{flex:1;overflow:auto;overscroll-behavior:contain;max-height:62vh;min-height:200px;display:flex;flex-direction:column;gap:12px;padding:4px 2px 12px}
.placeholder{color:var(--muted);font-size:14px;margin:0;padding:10px 2px}
.suggest{margin:0 0 10px;border:1px solid var(--line);border-radius:10px;padding:8px 12px;background:#fbfdff}
.suggest summary{cursor:pointer;color:var(--ink2);font-size:14px;font-weight:600}
.suggest summary span{color:var(--muted);font-weight:400}
.suggest[open] summary{margin-bottom:10px}
.chips{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:8px}
.chip{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 12px;font:inherit;font-size:13.5px;line-height:1.35;cursor:pointer;text-align:left;min-width:0;overflow-wrap:anywhere}
.chip:hover{border-color:var(--teal);background:#f0fdfa}
.turn{max-width:88%;padding:10px 14px;border-radius:14px;overflow-wrap:anywhere}
.turn.user{align-self:flex-end;background:var(--ink2);color:#fff;border-bottom-right-radius:4px;white-space:pre-wrap}
.turn.bot{align-self:flex-start;background:#f8fafc;border:1px solid var(--line);border-bottom-left-radius:4px;min-width:0}
.turn.err-turn{border-color:#fecdca;background:#fffbfa}
.turn ul{margin:6px 0;padding-left:20px}
.cite{display:inline-block;min-width:20px;padding:0 5px;margin:0 1px;border-radius:6px;background:#ede9fe;color:var(--violet);font-size:12px;font-weight:700;text-align:center;text-decoration:none;vertical-align:1px}
.sources{margin-top:8px;font-size:13px;min-width:0}.sources summary{cursor:pointer;color:var(--violet);font-weight:600;padding:4px 0}
.sources ol{padding-left:20px;margin:6px 0}.sources li{overflow-wrap:anywhere}
.sources blockquote{margin:4px 0 8px;padding:6px 10px;border-left:3px solid var(--teal2);background:#fff;color:var(--muted);white-space:pre-line;max-height:9.5em;overflow:auto;overflow-wrap:anywhere}
@media(max-width:600px){.top{gap:8px;padding:10px 16px}.pill{display:none}.back{font-size:13px}
 .chat{min-height:0}.log{max-height:58vh;min-height:160px}.turn{max-width:96%}
 .sources blockquote{max-height:7em}.wrap{padding:20px 14px 32px}}
.err{color:var(--err)}.dots{letter-spacing:3px;color:var(--muted);animation:p 1s infinite}@keyframes p{50%{opacity:.3}}
@media(prefers-reduced-motion:reduce){.dots{animation:none}}
.composer{display:flex;gap:8px;border-top:1px solid var(--line);padding-top:12px}
.composer textarea{flex:1;resize:vertical;min-height:46px;border:1px solid #c7d2e0;border-radius:10px;padding:10px 12px;font:inherit}
.composer button{border:0;border-radius:10px;padding:0 20px;background:var(--grad);color:#fff;font-weight:700;cursor:pointer}
.composer button:disabled{opacity:.5;cursor:wait}
.small{font-size:12.5px;color:var(--muted);margin:8px 0 0}
.how{margin-top:28px}.how h2{font-size:20px;color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;padding:0;list-style:none;counter-reset:s}
.steps li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;font-size:14px;color:var(--muted)}
.steps b{display:block;color:var(--ink);margin-bottom:4px}
.dl{padding-left:18px}.dl li{margin:4px 0}.dl span{color:var(--muted);font-size:14px}
.foot{text-align:center;color:var(--muted);font-size:13px;padding:24px 16px;border-top:1px solid var(--line)}
#timer:empty{display:none}
.chip:disabled,.composer button:disabled,.x:disabled{opacity:.55;cursor:not-allowed}
.composer textarea:disabled{background:#f1f5f9;color:var(--muted);cursor:not-allowed}
.restart{margin-left:6px;border:1px solid var(--teal);background:#fff;color:var(--teal);border-radius:99px;padding:4px 12px;font:inherit;font-weight:600;cursor:pointer}
/* Phone refinements live last so they win over the base composer rules above. */
@media(max-width:600px){
  .composer{position:sticky;bottom:0;z-index:2;background:var(--card);padding:10px 0 4px;flex-wrap:nowrap}
  .composer textarea{font-size:16px}
  .composer button{padding:0 14px;min-height:46px;min-width:74px}
  .chip{padding:9px 13px}
}
.brand img{border-radius:50%;display:block}