:root{--bg: #eef2f6;--panel: #ffffff;--border: #e1e6ec;--ink: #1c2733;--ink2: #5a6a7a;--ink3: #93a1b0;--brand: #2a78d6;--brand-dark: #1c5cab;--brand-soft: #e8f1fc;--user-bubble: #2a78d6;--ai-bubble: #f4f6f9;--good: #0ca30c;--warn: #b97900}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,sans-serif;background:var(--bg);color:var(--ink);height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}#root{width:100%;height:100%;display:flex;align-items:center;justify-content:center}.app{width:100%;max-width:520px;height:min(760px,95vh);background:var(--panel);border:1px solid var(--border);border-radius:18px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 18px 50px #1c273324}header{padding:14px 18px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;display:flex;align-items:center;gap:12px}.avatar{width:38px;height:38px;border-radius:50%;background:#ffffff2e;display:flex;align-items:center;justify-content:center;font-size:19px}header h1{font-size:15px;font-weight:600}header .tag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:#ffffff38;padding:1px 8px;border-radius:12px;margin-left:6px;vertical-align:1px}header p{font-size:11.5px;opacity:.85;margin-top:1px}.chat{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:12px}.msg{max-width:86%;padding:10px 14px;border-radius:16px;font-size:13.5px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}.msg.ai{background:var(--ai-bubble);border:1px solid var(--border);border-bottom-left-radius:6px;align-self:flex-start}.msg.agent{background:#eafaf0;border:1px solid #bfe8cd;border-bottom-left-radius:6px;align-self:flex-start}.msg.agent .who{display:block;font-size:11px;font-weight:700;color:var(--good);margin-bottom:2px}.msg.user{background:var(--user-bubble);color:#fff;border-bottom-right-radius:6px;align-self:flex-end}.msg a{color:var(--brand-dark);font-weight:600;text-decoration:none;border-bottom:1px solid var(--brand)}.msg .src{display:block;margin-top:8px;padding-top:8px;border-top:1px dashed var(--border);font-size:12px;color:var(--ink2)}.msg ol,.msg ul{padding-left:18px;margin:4px 0}.chips{display:flex;flex-wrap:wrap;gap:8px;align-self:flex-start;max-width:86%}.chip{border:1.5px solid var(--brand);color:var(--brand-dark);background:var(--brand-soft);font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:20px;cursor:pointer;transition:all .12s}.chip:hover{background:var(--brand);color:#fff}.chip.picked{background:var(--brand);color:#fff;cursor:default}.meta{font-size:10.5px;color:var(--ink3);align-self:flex-start;margin:-6px 0 0 6px}.escalate{align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--brand-dark);background:none;border:1.5px dashed var(--brand);padding:7px 14px;border-radius:20px;cursor:pointer}.escalate:hover{background:var(--brand-soft)}.typing{align-self:flex-start;display:flex;gap:4px;padding:12px 16px;background:var(--ai-bubble);border:1px solid var(--border);border-radius:16px 16px 16px 6px}.typing span{width:7px;height:7px;border-radius:50%;background:var(--ink3);animation:b 1.2s infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes b{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}form{display:flex;gap:10px;padding:12px 14px;border-top:1px solid var(--border);background:var(--panel)}input{flex:1;border:1.5px solid var(--border);border-radius:22px;padding:10px 16px;font-size:14px;outline:none;color:var(--ink)}input:focus{border-color:var(--brand)}button[type=submit]{width:42px;height:42px;border:none;border-radius:50%;background:var(--brand);color:#fff;font-size:17px;cursor:pointer;flex-shrink:0}button[type=submit]:disabled{opacity:.4;cursor:default}.foot{text-align:center;font-size:10px;color:var(--ink3);padding:0 0 8px;background:var(--panel)}.debug{font-size:10.5px;color:var(--ink3);background:var(--bg);border-radius:8px;padding:6px 10px;align-self:flex-start;max-width:86%;display:none}.app.show-debug .debug{display:block}