:root{--background:#f6f4ef;--surface:#fffdfa;--surface-muted:#eee9df;--text:#1f2328;--muted:#687076;--border:#ded7cb;--accent:#157f5b;--accent-strong:#0b6848;--accent-soft:#d8efe6;--danger:#9f3030}*{box-sizing:border-box}html,body{min-height:100%}body{background:var(--background);color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea{font:inherit}.shell{justify-content:center;min-height:100vh;padding:24px;display:flex}.conversation{background:var(--surface);border:1px solid var(--border);border-radius:8px;grid-template-rows:auto 1fr auto;width:min(100%,920px);min-height:calc(100vh - 48px);display:grid;overflow:hidden;box-shadow:0 20px 60px #1f23281a}.topbar{border-bottom:1px solid var(--border);background:#fffdfaeb;justify-content:space-between;align-items:center;gap:16px;min-height:84px;padding:18px 22px;display:flex}.eyebrow{color:var(--accent-strong);text-transform:uppercase;letter-spacing:0;margin:0 0 4px;font-size:.78rem;font-weight:700}h1{margin:0;font-size:clamp(1.15rem,2vw,1.45rem);line-height:1.2}.status{border:1px solid var(--border);min-width:48px;height:32px;color:var(--accent-strong);background:var(--accent-soft);border-radius:999px;justify-content:center;align-items:center;font-size:.82rem;font-weight:700;display:inline-flex}.messages{flex-direction:column;gap:18px;padding:28px 22px;display:flex;overflow-y:auto}.auth-panel{border:1px solid var(--border);background:#fff;border-radius:8px;align-self:start;width:min(100% - 44px,620px);margin:28px 22px;padding:18px}.auth-panel h2{margin:0 0 10px;font-size:1.15rem}.auth-panel p{color:var(--muted);margin:0 0 12px;line-height:1.5}.auth-panel code{background:var(--surface-muted);max-width:100%;color:var(--text);overflow-wrap:anywhere;border-radius:6px;padding:6px 8px;display:inline-block}.message{grid-template-columns:42px minmax(0,1fr);align-items:start;gap:12px;display:grid}.message.user{align-self:end;max-width:760px}.message.assistant{align-self:start;max-width:760px}.avatar{color:#fffdfa;background:#252a2e;border-radius:999px;justify-content:center;align-items:center;width:42px;height:42px;font-size:.78rem;font-weight:750;display:flex}.message.user .avatar{background:var(--accent)}.message p{border:1px solid var(--border);white-space:pre-wrap;overflow-wrap:anywhere;background:#fff;border-radius:8px;min-width:0;margin:0;padding:12px 14px;line-height:1.55}.message.user p{background:var(--accent);border-color:var(--accent);color:#fff}.typing:after{content:"..."}.composer{border-top:1px solid var(--border);background:var(--surface-muted);grid-template-columns:minmax(0,1fr) 46px;gap:10px;padding:16px;display:grid}textarea{resize:vertical;border:1px solid var(--border);width:100%;min-height:46px;max-height:160px;color:var(--text);background:#fff;border-radius:8px;outline:none;padding:12px 14px}textarea:disabled{color:var(--muted);background:#f2eee7}textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #157f5b26}button{color:#fff;background:var(--accent);cursor:pointer;border:0;border-radius:8px;justify-content:center;align-items:center;width:46px;height:46px;display:inline-flex}button:disabled{cursor:not-allowed;background:#99a39d}button:not(:disabled):hover{background:var(--accent-strong)}@media (max-width:640px){.shell{padding:0}.conversation{border:0;border-radius:0;min-height:100vh}.topbar{min-height:74px;padding:14px 16px}.messages{padding:20px 14px}.message{grid-template-columns:34px minmax(0,1fr);gap:10px}.avatar{width:34px;height:34px;font-size:.68rem}.composer{padding:12px}}