:root{--blue:#0060aa;--cyan:#00a4d8;--ink:#1c2733;--muted:#5b6b7a;--line:#e4e9ef;--bg:#f5f8fb}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}.wrap{flex-direction:column;height:100dvh;max-width:760px;margin:0 auto}.hdr,.wrap{display:flex;background:#fff}.hdr{justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line)}.brand,.hdr{align-items:center}.brand{display:flex;gap:8px;font-weight:700;color:var(--blue)}.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 3px rgba(0,164,216,.15)}.brand .tag{font-weight:500;font-size:11px;color:var(--muted);background:#eef4f9;border:1px solid var(--line);padding:2px 7px;border-radius:999px}.logout{color:var(--muted);text-decoration:none;font-size:13px}.logout:hover{color:var(--blue)}.chat{flex:1 1;overflow-y:auto;padding:18px 16px;flex-direction:column;gap:12px}.chat,.row{display:flex}.row.user{justify-content:flex-end}.bubble{max-width:82%;padding:10px 14px;border-radius:16px;line-height:1.45;white-space:pre-wrap;word-wrap:break-word;font-size:15px}.row.assistant .bubble{background:#eef4f9;color:var(--ink);border-bottom-left-radius:4px}.row.user .bubble{background:var(--blue);color:#fff;border-bottom-right-radius:4px}.composer{display:flex;gap:8px;padding:12px 16px;border-top:1px solid var(--line);background:#fff}.composer textarea{flex:1 1;resize:none;border:1px solid var(--line);border-radius:12px;padding:11px 12px;font:inherit;font-size:15px;max-height:140px;outline:none}.composer textarea:focus{border-color:var(--cyan)}.composer button{border:0;background:var(--blue);color:#fff;font-weight:600;padding:0 18px;border-radius:12px;cursor:pointer}.composer button:disabled{opacity:.5;cursor:default}.login{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:20px}.card{width:100%;max-width:380px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}.card h1{margin:0 0 4px;color:var(--blue);font-size:22px}.card .sub{margin:0 0 18px;color:var(--muted);font-size:14px}.card form{display:flex;flex-direction:column;gap:10px}.card input{border:1px solid var(--line);border-radius:10px;padding:12px;font:inherit;font-size:15px;outline:none}.card input:focus{border-color:var(--cyan)}.card button{border:0;background:var(--blue);color:#fff;font-weight:600;padding:12px;border-radius:10px;cursor:pointer}.card button:disabled{opacity:.6}.card .msg{margin-top:14px;font-size:14px;color:var(--muted);word-break:break-all}.card .msg a{color:var(--blue)}.embed-wrap{display:flex;flex-direction:column;height:100dvh;background:#fff}.embed-hdr{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line);font-weight:700;color:var(--blue);font-size:15px}