*{box-sizing:border-box}body{margin:0;font:15px/1.4 system-ui,sans-serif;background:#f5f5f7;color:#1c1c1e}button,select,input,textarea{font:inherit}button{padding:6px 12px;border:1px solid #bbb;border-radius:6px;background:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:#1d4ed8;border-color:#1d4ed8;color:#fff}.center{text-align:center;margin-top:3rem}.error{color:#b91c1c;min-height:1.4em;margin:4px 0}.hint,.status{color:#666;font-size:13px}.login{max-width:320px;margin:15vh auto;display:flex;flex-direction:column;gap:10px}.login input{padding:8px;border:1px solid #bbb;border-radius:6px}.chat{display:flex;flex-direction:column;height:100vh;max-width:820px;margin:0 auto;background:#fff}.chat header{display:flex;gap:14px;align-items:center;padding:10px 14px;border-bottom:1px solid #ddd}.spacer{flex:1}.chat main{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}.bubble{max-width:80%;padding:8px 12px;border-radius:12px}.bubble.user{align-self:flex-end;background:#dbeafe}.bubble.agent{align-self:flex-start;background:#f0f0f2}.bubble .who{font-size:11px;color:#666}.bubble .text{white-space:pre-wrap;overflow-wrap:anywhere}.chat footer{border-top:1px solid #ddd;padding:10px 14px}.chat textarea{width:100%;padding:8px;border:1px solid #bbb;border-radius:6px;resize:vertical}.row{display:flex;gap:10px;align-items:center;justify-content:flex-end;margin-top:6px}.row .status{margin-right:auto}.spinner{display:inline-block;width:12px;height:12px;margin-right:6px;border:2px solid #bbb;border-top-color:#1d4ed8;border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px}@keyframes spin{to{transform:rotate(360deg)}}