:root{--bg: #0b0c10;--panel: #111218;--text: #e5e7eb;--muted: #9aa0a6;--accent: #60a5fa;--border: #23242b}body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}h1{margin:0 0 12px;font-size:28px}.chip{font-size:12px;color:var(--muted);padding:4px 8px;border:1px solid var(--border);border-radius:999px}.input,select,textarea{background:#0f1116;color:var(--text);border:1px solid var(--border);border-radius:8px;padding:8px 10px}.btn{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:8px 12px;cursor:pointer}.btn:hover:not(:disabled){border-color:#2e313a}#chat{background:var(--panel);border:1px solid var(--border);border-radius:12px;height:420px;padding:12px;overflow:auto}.chat-msg{padding:8px 10px;margin:6px 0;background:#0f1116;border-radius:10px}.chat-msg.user{background:#0d1321}.composer{display:flex;gap:8px;margin-top:10px;align-items:center}:root{--bg: #f7f7f8;--panel: #ffffff;--text: #0b0f19;--muted: #6b7280;--accent: #10a37f;--accent-ink: #ffffff;--accent-weak: #e7f7f2;--border: #e5e7eb;--ring: rgba(16,163,127,.25);--shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 12px rgba(0,0,0,.06)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 ui-sans-serif,-apple-system,system-ui,Segoe UI,Roboto,Helvetica Neue,Arial,"Apple Color Emoji","Segoe UI Emoji"}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:980px;margin:24px auto;padding:16px}h1{margin:0 0 12px;font-size:28px;font-weight:700;letter-spacing:.2px}.topbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:10px}.chip{font-size:12px;color:var(--muted);padding:4px 8px;border:1px solid var(--border);border-radius:999px;background:#fafafa}.input,select,textarea{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:8px 10px;outline:none;transition:box-shadow .12s ease,border-color .12s ease}.input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--ring)}.input.w-56{width:14rem}.input.w-80{width:20rem}.input.w-44{width:11rem}.btn{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:8px 12px;cursor:pointer;transition:border-color .12s ease,transform .02s ease,box-shadow .12s ease}.btn:hover:not(:disabled){border-color:#d7dce2;box-shadow:0 1px 2px #0000000a}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.btn.primary:hover:not(:disabled){filter:brightness(.97);box-shadow:0 1px 2px #10a37f40}#signin,#signout{float:right}#chat{background:var(--panel);border:1px solid var(--border);border-radius:12px;height:480px;padding:12px;overflow:auto;box-shadow:var(--shadow)}.chat-msg{padding:10px 12px;margin:8px 0;background:#fafafa;border:1px solid var(--border);border-radius:12px}.chat-msg.user{background:var(--accent-weak);border-color:#cfeee5}.chat-msg.assistant{background:#fff}.composer{display:flex;gap:8px;margin-top:12px;align-items:center}.composer .input.grow{flex:1;min-height:44px;resize:vertical}.status{color:var(--muted);font-size:12px;margin-left:8px}#chat::-webkit-scrollbar{width:10px}#chat::-webkit-scrollbar-thumb{background:#e5e7eb;border-radius:8px}#chat::-webkit-scrollbar-thumb:hover{background:#d7dce2}@media (prefers-reduced-motion: reduce){.btn,.input,select,textarea{transition:none}}