*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;background:#f9fafb;color:#111827}.chat-page{max-width:640px;margin:0 auto;height:100vh;display:flex;flex-direction:column;background:#fff;box-shadow:0 0 0 1px #e5e7eb}.chat-header{background:#111827;color:#fff;padding:16px 20px;font-weight:600;font-size:16px}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.chat-empty{color:#6b7280;font-size:14px}.chat-msg{max-width:80%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.5;white-space:pre-wrap}.chat-user{align-self:flex-end;background:#111827;color:#fff}.chat-assistant{align-self:flex-start;background:#f3f4f6;color:#111827}.chat-pending{opacity:.6}.chat-sources{margin-top:6px;font-size:11px;opacity:.7}.chat-inputRow{display:flex;gap:8px;padding:12px;border-top:1px solid #e5e7eb}.chat-input{flex:1;border:1px solid #d1d5db;border-radius:8px;padding:10px 12px;font-size:14px;font-family:inherit;resize:none}.chat-send{background:#111827;color:#fff;border:none;border-radius:8px;padding:0 18px;cursor:pointer;font-size:14px}.chat-send:disabled{opacity:.5;cursor:default}