:root{color-scheme:light;--bg:#f7f8fa;--surface:#fff;--ink:#0f172a;--text:#1f2937;--muted:#4b5563;--border:#e5e7eb;--blue:#1d4ed8;--tint:#eef4ff;--radius:16px;--shadow:0 12px 32px rgba(15,23,42,.06)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,'Segoe UI',Roboto,Arial,sans-serif;line-height:1.6;font-size:16px}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button,a,input,textarea{touch-action:manipulation}button,a{transition:background 180ms,color 180ms,border-color 180ms}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}[hidden]{display:none!important}.skip{position:absolute;top:-80px;background:white;padding:12px;z-index:3}.skip:focus{top:0}.header{height:80px;max-width:1200px;margin:auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:10px;align-items:center;font-weight:650;font-size:17px;color:var(--ink);text-decoration:none}.brand-mark{display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:8px;width:30px;height:30px;font-size:18px}.demo-label{font-size:10px;letter-spacing:.13em;color:var(--muted);font-weight:650}.onboarding{max-width:900px;margin:auto;padding:68px 30px 32px;text-align:center}.eyebrow{color:var(--blue);text-transform:uppercase;font-size:11px;font-weight:700;letter-spacing:.14em;margin:0 0 20px}h1{font-size:clamp(38px,5.4vw,62px);line-height:1.1;letter-spacing:-.045em;font-weight:650;margin:0;color:var(--ink)}.lead{font-size:19px;margin:24px 0 38px;color:var(--muted)}.field-panel{text-align:left;padding:32px;background:white;border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow)}h2{font-size:22px;letter-spacing:-.025em;margin:0 0 6px;font-weight:650}p{margin:0}.muted{color:var(--muted);font-size:14px}.field-choices{display:flex;flex-wrap:wrap;gap:9px;margin:24px 0 27px}.field-choices button,.followups button{border:1px solid var(--border);border-radius:999px;background:white;color:var(--text);padding:9px 16px;font-size:14px;min-height:44px}.field-choices button:hover,.followups button:hover{border-color:#9db4ed;background:var(--tint)}.field-choices button[aria-pressed=true]{background:var(--tint);color:var(--blue);border-color:var(--blue)}label{display:block;font-size:13px;font-weight:600;margin-bottom:8px}.field-entry{display:flex;gap:10px;align-items:center}.field-entry input{min-width:0;flex:1;width:100%;padding:12px 14px;border:1px solid #cbd5e1;border-radius:10px;color:var(--ink);background:#fff}.primary{border:1px solid var(--blue);border-radius:10px;background:var(--blue);color:white;font-weight:600;padding:12px 18px;min-height:46px;white-space:nowrap;font-size:14px}.primary:hover:not(:disabled){background:#1e3a8a}.primary span{margin-left:12px}.privacy-note{font-size:12px;line-height:1.6;color:var(--muted);margin-top:20px;max-width:68ch}.principles{display:flex;gap:20px;justify-content:center;margin:27px 0;font-size:12px;color:var(--muted)}.principles span+span:before{content:'·';margin-right:20px;color:#94a3b8}footer{text-align:center;font-size:11px;color:var(--muted);padding:32px 24px}footer span{margin:0 12px}.workspace{max-width:960px;margin:auto;padding:36px 30px 0}.workspace-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 26px}.workspace-heading .eyebrow{margin:0 0 8px}.workspace h1{font-size:clamp(25px,3.5vw,34px);letter-spacing:-.035em}.context-button{display:flex;flex-direction:column;align-items:flex-end;max-width:45%;overflow-wrap:anywhere;text-align:right;border:1px solid var(--border);background:white;border-radius:12px;padding:10px 15px;color:var(--ink);font-size:13px;font-weight:600}.change-label{font-size:11px;font-weight:400;color:var(--blue)}.change-form{border:1px solid var(--border);background:var(--surface);border-radius:16px;padding:20px;margin-bottom:20px}.change-form .muted{margin-top:10px}.conversation-shell{background:var(--surface);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}.session-line{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 26px;border-bottom:1px solid var(--border);font-size:11px;color:var(--muted)}.session-line i{display:inline-block;width:6px;height:6px;background:#0f766e;border-radius:50%;margin-right:8px}.quiet{background:transparent;border:0;border-radius:8px;padding:9px 10px;color:var(--muted);font-size:12px;min-height:44px}.quiet:hover:not(:disabled){background:var(--bg);color:var(--ink)}.conversation{padding:32px;min-height:230px;max-height:65vh;overflow:auto;scroll-behavior:smooth}.turn{margin-bottom:28px;animation:arrive 200ms ease-out}.turn:last-child{margin-bottom:0}.turn-label{display:block;text-transform:uppercase;letter-spacing:.1em;font-weight:700;font-size:10px;color:var(--blue);margin-bottom:8px}.turn.user{margin-left:15%;padding:16px 20px;border-radius:16px;background:#f1f3f7}.turn.user .turn-label{color:var(--muted)}.turn p{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.75}.turn.system{font-size:12px;color:var(--muted);padding:10px 0;border-top:1px solid var(--border)}.learning-card{margin-top:20px;border:1px solid var(--border);border-radius:14px;padding:22px;background:#fbfcfe}.learning-card h3{font-size:15px;margin:0 0 16px;font-weight:650;color:var(--ink)}.learning-card p{font-size:14px}.learning-card ol{padding-left:22px;margin:0}.learning-card li{padding:0 0 15px 8px}.learning-card li:last-child{padding-bottom:0}.learning-card strong{font-size:14px}.comparison-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px}.comparison-grid>div{padding-left:15px;border-left:2px solid #bfdbfe}.timeline li::marker{color:var(--blue)}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#eef2f7;color:#0f172a;border-radius:10px;padding:18px;font-size:13px;line-height:1.7;font-family:Consolas,monospace}details{border-top:1px solid var(--border);padding:12px 0}summary{cursor:pointer;font-weight:600;font-size:14px}details p{padding-top:10px}.quiz-choices{display:grid;gap:9px;margin:15px 0}.quiz-choices button{background:white;text-align:left;padding:12px 15px;border:1px solid #cbd5e1;border-radius:10px;color:var(--text);font-size:14px}.quiz-choices button:hover{border-color:var(--blue)}.quiz-choices button[aria-pressed=true]{border-color:var(--blue);background:var(--tint)}.feedback{border-left:3px solid var(--blue);padding:8px 12px;background:var(--tint)}.followups{padding:0 32px 20px;display:flex;flex-wrap:wrap;gap:7px}.followups button{font-size:12px;padding:7px 12px}.composer{border-top:1px solid var(--border);padding:22px 26px}.composer textarea{width:100%;resize:vertical;min-height:85px;max-height:240px;border:1px solid #cbd5e1;border-radius:12px;padding:14px;background:#fff;color:var(--text);font-size:15px;line-height:1.5}.composer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}.composer-bottom p{font-size:11px;color:var(--muted)}.composer-bottom>div{display:flex;gap:6px;align-items:center}.busy{padding:0 32px 24px;font-size:13px;color:var(--muted)}.thinking-dot{display:inline-block;width:7px;height:7px;background:var(--blue);border-radius:50%;margin-right:10px;animation:pulse 1s infinite alternate}.error{background:#fff1f2;color:#9f1239;border:1px solid #fecdd3;padding:12px 16px;margin:0 26px 20px;font-size:13px;border-radius:10px}.workspace-note{max-width:760px;margin:16px auto 0;text-align:center;font-size:11px;color:var(--muted);line-height:1.7}.voice-status{font-size:11px;color:var(--muted);text-align:center;margin-top:12px;min-height:18px}@keyframes arrive{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{to{opacity:.35}}@media(max-width:640px){.header{height:68px;padding:0 20px}.brand{font-size:14px}.demo-label{display:none}.onboarding{padding:38px 18px 12px}.lead{font-size:16px;margin:20px 0 28px}.eyebrow{font-size:9px}.field-panel{padding:24px 20px;border-radius:18px}.field-entry{flex-wrap:wrap}.field-entry input{flex-basis:100%}.field-entry .primary{width:100%}.field-choices{gap:8px}.field-choices button{font-size:12px;padding:9px 12px}.principles{flex-direction:column;gap:8px}.principles span+span:before{display:none}.workspace{padding:20px 12px 0}.workspace-heading{align-items:flex-start;padding:0 6px;gap:10px}.workspace h1{font-size:24px}.context-button{max-width:42%;font-size:11px;padding:8px 10px}.conversation-shell{border-radius:16px}.conversation{padding:24px 18px;max-height:58vh}.turn.user{margin-left:8%}.session-line{padding:8px 14px;font-size:10px}.composer{padding:18px 14px}.composer-bottom p{max-width:120px}.followups{padding:0 14px 16px}.learning-card{padding:16px}.comparison-grid{grid-template-columns:1fr}.busy{padding:0 18px 20px}footer{font-size:10px}footer span{margin:0 5px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}