:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;color-scheme:dark;--bg:#0b0c0f;--panel:#14161b;--line:#292d36;--text:#f2f3f5;--muted:#9ba3b2;--accent:#6d7cff;--user:#23283a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}main{min-height:100vh;display:grid;place-items:center;padding:20px}.hidden{display:none!important}.card{width:min(420px,100%);background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px}.card h1{margin:0 0 8px}.card p{color:var(--muted)}label{display:grid;gap:7px;margin:16px 0;font-size:14px}input,textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:#0f1115;color:var(--text);padding:12px;font:inherit;outline:none}input:focus,textarea:focus{border-color:var(--accent)}button{border:0;border-radius:10px;background:var(--accent);color:white;padding:11px 18px;font:inherit;font-weight:650;cursor:pointer}button:disabled{opacity:.55;cursor:not-allowed}.secondary{background:transparent;border:1px solid var(--line);color:var(--muted)}.error{min-height:1.4em;color:#ff7d87!important}.chat{width:min(900px,100%);height:calc(100vh - 40px);display:grid;grid-template-rows:auto 1fr auto auto;background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow:hidden}.chat header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}h1{font-size:19px;margin:0}small,.privacy{color:var(--muted)}.actions{display:flex;gap:8px}#messages{overflow:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.message{max-width:85%;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.55;padding:12px 15px;border-radius:14px;background:#191c22}.message.user{align-self:flex-end;background:var(--user)}.message.assistant{align-self:flex-start}.message.error{color:#ff9ca4;border:1px solid #6e3036}#composer{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end;padding:14px 18px;border-top:1px solid var(--line)}textarea{resize:none;max-height:180px}.privacy{text-align:center;font-size:12px;margin:0;padding:0 14px 12px}@media(max-width:600px){main{padding:0}.chat{height:100vh;border:0;border-radius:0}.chat header{padding:12px}.actions button{padding:8px 10px}#messages{padding:16px}.message{max-width:92%}#composer{padding:10px}.privacy{display:none}}