:root{color-scheme:light dark;--bg:#fff;--surface:#f6f7f8;--text:#20272b;--muted:#626b72;--line:#e1e5e8;--green:#15664a;--green-soft:#e9f4ee;--buyer:#f0f2f4;--danger:#9c342e;--warning:#fcf3dd;--focus:#15664a}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.panel{max-width:800px;margin:auto;display:flex;flex-direction:column;height:100dvh;min-height:460px}header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 14px;gap:12px}.identity{display:flex;align-items:center;gap:12px;min-width:0}.avatar{display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;border-radius:50%;background:var(--green-soft);color:var(--green);font-size:13px;font-weight:600}h1{font-size:16px;line-height:1.35;margin:0;font-weight:650}p{margin:0}.identity p{font-size:12px;color:var(--muted);margin-top:3px}.ownership{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 20px;padding:12px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.ownership>div{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center}.state{font-size:12px;font-weight:600;display:inline-flex;align-items:center;gap:6px}.state:before{content:"";width:6px;height:6px;background:var(--green);border-radius:50%}#window{font-size:11px;color:var(--muted)}button{border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--text);padding:7px 12px;font-family:inherit;font-size:12px;font-weight:600;line-height:1.4;cursor:pointer;white-space:nowrap;min-height:34px}button:hover:not(:disabled){background:var(--surface)}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}.quiet{border:0;background:transparent;color:var(--muted);font-size:12px}button:focus-visible,textarea:focus-visible,#messages:focus-visible{outline:2px solid var(--focus);outline-offset:3px}#messages{overflow:auto;flex:1;min-height:100px;padding:20px;scrollbar-gutter:stable}.message{display:flex;flex-direction:column;align-items:flex-start;margin-bottom:16px}.message.outbound{align-items:flex-end}.bubble{padding:10px 12px;border-radius:8px;background:var(--buyer);max-width:87%;overflow-wrap:anywhere;white-space:pre-wrap;font-size:13px;line-height:1.55}.outbound .bubble{background:var(--green-soft)}.meta{font-size:10px;line-height:1.5;color:var(--muted);margin:5px 2px 0;display:flex;flex-wrap:wrap;gap:4px}.day{text-align:center;color:var(--muted);font-size:11px;margin:4px 0 20px}.empty{color:var(--muted);text-align:center;padding:32px 12px}.failed{color:var(--danger)}#composer{margin:0 20px;border:1px solid var(--line);border-radius:8px;padding:10px 12px}textarea{display:block;width:100%;resize:vertical;max-height:160px;border:0;background:transparent;color:var(--text);font-family:inherit;font-size:13px;line-height:1.5;outline-offset:0;padding:2px 0}textarea::placeholder{color:var(--muted)}.compose-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:8px}#hint{font-size:10px;color:var(--muted)}#send{background:var(--green);color:#fff;border-color:var(--green);min-width:85px}#send:hover:not(:disabled){background:#0e523b}footer{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 20px;color:var(--muted);font-size:10px}.preview{background:var(--warning);font-size:11px;padding:8px 20px;color:var(--text);border-bottom:1px solid var(--line)}#error{background:var(--warning);color:var(--danger);padding:10px 12px;margin:12px 20px 0;border-radius:6px;font-size:12px}.notice{padding:10px 20px 0;font-size:11px;color:var(--muted)}.new-message{text-align:center;margin-top:-12px;margin-bottom:8px}.new-message button{background:var(--bg);border:1px solid var(--line);color:var(--green)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(max-width:380px){header{padding:14px 12px 12px}.ownership{margin:0 12px;align-items:flex-start}.ownership>div{flex-direction:column;align-items:flex-start;gap:4px}#messages{padding:16px 12px}.bubble{max-width:94%}#composer{margin:0 12px}.compose-footer{align-items:flex-end}footer{padding:10px 12px}#hint{max-width:170px}}
@media(prefers-color-scheme:dark){:root{--bg:#202324;--surface:#2a2e30;--text:#e8edef;--muted:#a2acb0;--line:#3a4042;--green:#62c69b;--green-soft:#213c32;--buyer:#303638;--danger:#ffa79e;--warning:#413922;--focus:#62c69b}#send{background:#246d50;border-color:#246d50}#send:hover:not(:disabled){background:#2e7e5d}}

.history-action{text-align:center}.history-action:has(button[hidden]){display:none}

.ownership{flex-wrap:wrap}.ownership>.control-actions{display:flex;flex-direction:row;align-items:center;justify-content:flex-end;gap:6px}