:root{--orange:#ef5b35;--navy:#16324f;--muted:#667085;--line:#e1e7ed}*{box-sizing:border-box}body{margin:0;background:#f5f7fa;color:#26394c;font:14px/1.55 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}button,textarea,input{font:inherit}header{display:flex;align-items:center;justify-content:space-between;min-height:64px;padding:0 20px;background:#fff;border-bottom:1px solid var(--line)}header a{color:var(--navy);text-decoration:none}button{padding:9px 14px;border:0;border-radius:8px;background:var(--orange);color:#fff;font-weight:750;cursor:pointer}main{min-height:calc(100vh - 170px);padding:24px}.login{max-width:520px;margin:10vh auto;padding:30px;border:1px solid var(--line);border-radius:16px;background:#fff;text-align:center}.login div{display:flex;justify-content:center;gap:10px}.login a{padding:11px 18px;border-radius:9px;background:var(--navy);color:#fff;text-decoration:none}.hidden{display:none!important}.workspace{display:grid;grid-template-columns:330px minmax(0,800px);height:calc(100vh - 145px);max-width:1150px;margin:auto;border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden}.workspace aside{border-right:1px solid var(--line);overflow:auto}.aside-head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:15px;background:#fff;border-bottom:1px solid var(--line)}.conversation{display:flex;align-items:stretch;flex-direction:column;width:100%;padding:14px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:#fff;color:inherit;text-align:left}.conversation.active{background:#edf3f8}.conversation span{display:flex;justify-content:space-between;color:var(--muted)}.conversation span b{padding:1px 7px;border-radius:20px;background:var(--orange);color:#fff}.conversation small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.thread{display:grid;grid-template-rows:auto 1fr auto;min-width:0}#thread-head{display:flex;justify-content:space-between;padding:17px;border-bottom:1px solid var(--line)}#thread-head h2{margin:0}#messages{overflow:auto;padding:18px}.message{max-width:75%;margin:10px 0;padding:12px;border-radius:12px;background:#f1f4f7}.message.mine{margin-left:auto;background:#fff0e9}.message p{margin:5px 0;white-space:pre-wrap}.message a{display:block;color:var(--orange)}.message small{color:var(--muted)}#send-form{padding:14px;border-top:1px solid var(--line)}textarea{width:100%;min-height:75px;padding:10px;border:1px solid var(--line);border-radius:9px;resize:vertical}#send-form label{display:block;margin:7px 0;color:var(--muted)}#send-form>div{display:flex;justify-content:flex-end;gap:8px}.outline{background:#fff;color:var(--navy);border:1px solid var(--line)}.danger{margin-right:auto;background:#fff0f0;color:#b33232}.empty{padding:30px;color:var(--muted);text-align:center}footer{display:flex;justify-content:center;gap:15px;flex-wrap:wrap;padding:22px;background:#102a43;color:#fff;font-size:12px}footer p{width:100%;margin:0;text-align:center}@media(max-width:720px){main{padding:10px}.workspace{grid-template-columns:1fr;height:auto;min-height:calc(100vh - 150px)}.workspace aside{max-height:260px;border-right:0;border-bottom:1px solid var(--line)}.thread{min-height:560px}.message{max-width:90%}header strong{display:none}}