:root{font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;color:#232f3e;background:#f7f8fa}body{margin:0}.button{padding:6px 14px;border:1px solid #879196;border-radius:6px;background:#fff;cursor:pointer}.button:disabled{opacity:.5;cursor:default}.spinner{padding:24px;color:#545b64}.error{margin:8px 0;padding:8px 12px;border-radius:6px;background:#fdecea;color:#b0261c;white-space:pre-wrap}.login{max-width:420px;margin:120px auto;text-align:center}.layout{display:flex;flex-direction:column;height:100vh}header{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#232f3e;color:#fff}header .user{margin-left:auto;font-size:13px;opacity:.8}.chat{flex:1;display:flex;flex-direction:column;max-width:960px;width:100%;margin:0 auto;min-height:0}.messages{flex:1;overflow-y:auto;padding:16px}.hint{color:#879196}.message{margin:10px 0;padding:10px 14px;border-radius:8px;background:#fff;border:1px solid #e3e6ea}.message.user{background:#e8f1fb;border-color:#cfe0f4}.message p:first-child{margin-top:0}.message p:last-child{margin-bottom:0}.message table{border-collapse:collapse;margin:8px 0;display:block;overflow-x:auto}.message th,.message td{border:1px solid #d5d9de;padding:4px 8px;text-align:left;vertical-align:top}.message th{background:#f3f5f7}.tools{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:6px}.tool{font-size:11px;padding:1px 6px;border-radius:4px;background:#eef0f2;color:#545b64}.question{margin:10px 0;padding:10px 14px;border-radius:8px;background:#fff8e6;border:1px solid #f2c94c}.options{display:flex;flex-wrap:wrap;gap:6px}.composer{padding:12px 16px;border-top:1px solid #e3e6ea;background:#fff}.composer textarea{width:100%;box-sizing:border-box;font:inherit;padding:8px;border-radius:6px;border:1px solid #c4c9cf}.actions{display:flex;align-items:center;gap:8px;margin-top:8px}.cost{margin-left:auto;font-size:12px;color:#879196}