:root{--ink:#143640;--muted:#748b91;--line:#dbe6e6;--paper:#fff;--wash:#f2f7f6;--teal:#009b96;--gold:#b99858;--green:#22a776;--shadow:0 14px 46px rgba(24,56,63,.08)}
*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--wash)}button,input,textarea{font:inherit}button{cursor:pointer}.app-shell{height:100dvh;display:flex;flex-direction:column;min-height:520px}.topbar{height:76px;flex:none;display:flex;align-items:center;gap:15px;background:#fff;border-bottom:1px solid var(--line);padding:0 clamp(16px,3vw,42px)}.brandmark{width:48px;height:48px;display:grid;place-items:center;font-weight:900;font-size:22px;color:#fff;background:var(--ink);border-radius:12px 12px 12px 3px;letter-spacing:-2px}.brandmark span{color:#f0d092}.brandcopy{display:grid;gap:2px;border-right:1px solid var(--line);padding-right:18px;min-width:140px}.brandcopy strong{font-size:16px}.brandcopy small,.chat-contact small{color:var(--muted)}.line-info{margin-left:auto;display:grid;text-align:right;gap:4px}.line-info strong{font-size:16px;letter-spacing:.04em}.eyebrow{font:700 10px/1.2 "Segoe UI",sans-serif;letter-spacing:.16em;color:var(--teal);margin:0}.live-state{margin-left:4px;border:1px solid var(--line);border-radius:20px;padding:10px 14px;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.live-state i{width:8px;height:8px;border-radius:100%;background:#c3cfd0}.live-state.on i{background:var(--green);box-shadow:0 0 0 4px #e3f6ef}.text-button,.icon-button{border:0;background:transparent;color:var(--teal);font-weight:650}.text-button{font-size:12px;padding:8px}.messenger{flex:1;min-height:0;display:grid;grid-template-columns:minmax(290px,360px) minmax(0,1fr);margin:20px auto;width:min(1320px,calc(100% - 40px));background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}.sidebar{display:flex;min-height:0;flex-direction:column;border-right:1px solid var(--line)}.sidebar-head{padding:24px 20px 16px;display:flex;align-items:center;justify-content:space-between}.sidebar-head h1{font-size:22px;margin:7px 0 0}.icon-button{height:36px;width:36px;border:1px solid var(--line);border-radius:10px;font-size:23px}.search{height:42px;display:flex;align-items:center;gap:8px;margin:0 16px 12px;padding:0 12px;background:#f4f8f8;border:1px solid #e9f0f0;border-radius:10px;color:#90a1a4}.search input{width:100%;border:0;outline:none;background:transparent;color:var(--ink);font-size:13px}.conversation-list{overflow:auto;flex:1}.conversation{width:100%;display:flex;gap:12px;align-items:center;padding:13px 16px;border:0;border-top:1px solid #f0f3f3;background:transparent;text-align:left;cursor:pointer}.conversation:hover,.conversation.active{background:#f1f9f8}.avatar{width:40px;height:40px;flex:none;border-radius:50%;display:grid;place-items:center;background:#e8f4f1;color:var(--teal);font-weight:750}.conversation-copy{min-width:0;flex:1}.conversation-top{display:flex;justify-content:space-between;gap:6px}.conversation-top strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation-time{font-size:10px;color:#97a7a9;white-space:nowrap}.conversation-preview{display:block;margin-top:5px;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.unread-dot{display:inline-block;width:7px;height:7px;margin-left:6px;background:var(--teal);border-radius:50%}.list-empty{padding:28px 22px;color:var(--muted);font-size:13px;line-height:1.6}.chat-panel{min-width:0;min-height:0;position:relative;background:#fbfdfd}.chat-empty{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);padding:24px}.bubble-mark{width:58px;height:58px;display:grid;place-items:center;border-radius:18px 18px 18px 4px;background:var(--ink);color:#f0d092;font-weight:900;font-size:19px}.chat-empty h2{margin:20px 0 7px;color:var(--ink);font-size:20px}.chat-empty p{margin:0;font-size:13px}.chat{height:100%;display:flex;flex-direction:column;min-height:0}.chat-head{height:72px;flex:none;display:flex;align-items:center;gap:12px;padding:12px 22px;border-bottom:1px solid var(--line);background:#fff}.chat-head .avatar{width:42px;height:42px}.chat-contact{display:grid;gap:4px;min-width:0}.chat-contact strong{font-size:14px}.chat-contact small{font-size:12px}.chat-head .text-button{margin-left:auto}.message-list{flex:1;min-height:0;overflow:auto;padding:20px clamp(16px,5vw,54px);display:flex;flex-direction:column;gap:8px}.message{max-width:min(76%,620px);padding:10px 13px;border-radius:14px;line-height:1.45;font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:0 2px 8px #15373d0a}.message.inbound{align-self:flex-start;background:white;border:1px solid var(--line);border-bottom-left-radius:4px}.message.outbound{align-self:flex-end;background:#dff4ee;border:1px solid #d0ece3;border-bottom-right-radius:4px}.message-meta{display:flex;justify-content:flex-end;gap:8px;margin-top:5px;color:#7d9694;font-size:10px}.composer{position:relative;flex:none;display:grid;grid-template-columns:1fr auto;gap:8px;padding:14px 20px 29px;border-top:1px solid var(--line);background:#fff}.composer textarea{resize:none;max-height:120px;min-height:42px;padding:12px 13px;border-radius:10px;border:1px solid var(--line);outline-color:var(--teal);font-size:13px}.primary{border:0;background:var(--teal);color:white;padding:0 18px;border-radius:10px;font-weight:700;min-height:42px}.primary:hover{background:#078d88}.primary span{margin-left:8px}.composer small{position:absolute;bottom:9px;left:22px;color:#97a7a9;font-size:10px}.app-shell footer{height:28px;flex:none;display:flex;justify-content:space-between;align-items:center;padding:0 clamp(20px,4vw,50px);font:700 9px/1 monospace;letter-spacing:.12em;color:#93a6a7}.login-wrap{height:100dvh;display:grid;place-items:center;padding:20px}.login-card{width:min(390px,100%);display:grid;gap:14px;padding:32px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.login-card .brandmark{margin-bottom:5px}.login-card h1{margin:0 0 4px;font-size:27px}.login-card label{font-size:12px;font-weight:700}.login-card input{height:44px;border:1px solid var(--line);border-radius:9px;padding:0 12px;outline-color:var(--teal)}.login-card .primary{height:44px}.error{min-height:16px;margin:0;color:#b83232;font-size:12px}
@media(max-width:700px){.topbar{height:64px;gap:10px;padding:0 12px}.brandmark{width:40px;height:40px;font-size:19px}.brandcopy{min-width:auto;border:0;padding:0}.brandcopy strong{font-size:14px}.brandcopy small{font-size:10px}.line-info{display:none}.live-state{margin-left:auto;padding:8px 10px}.messenger{grid-template-columns:minmax(95px,32%) 1fr;width:calc(100% - 16px);margin:8px;border-radius:12px}.sidebar-head{padding:16px 10px 12px}.sidebar-head h1{font-size:17px}.sidebar-head .eyebrow{font-size:8px}.search{margin:0 8px 8px;padding:0 8px}.conversation{padding:11px 8px;gap:7px}.conversation .avatar{width:34px;height:34px;font-size:11px}.conversation-top{display:block}.conversation-top strong{font-size:11px}.conversation-time{display:none}.conversation-preview{font-size:10px}.chat-head{padding:10px;height:64px}.message-list{padding:14px 10px}.message{max-width:90%;font-size:12px}.composer{padding:10px 9px 28px}.composer .primary{padding:0 12px}.composer small{left:10px}.app-shell footer{padding:0 12px;font-size:8px}.text-button{font-size:11px;padding:6px}}
@media(max-width:440px){.messenger{grid-template-columns:105px minmax(0,1fr)}.conversation{display:block;text-align:center;padding:9px 5px}.conversation .avatar{margin:0 auto 6px}.conversation-top strong{font-size:10px}.conversation-preview{font-size:9px}.chat-head .text-button{max-width:58px;white-space:normal}.composer{grid-template-columns:1fr auto;gap:5px}.composer textarea{padding:10px 8px;font-size:12px}.composer .primary{font-size:12px;padding:0 9px}}
@media(min-width:701px){.app-shell footer{gap:16px}.app-shell footer #source-status{margin-left:auto;margin-right:auto;letter-spacing:.04em;font-family:"Segoe UI",Arial,sans-serif;font-size:10px;font-weight:600}}
.app-error{flex:none;margin:10px auto 0;width:min(1320px,calc(100% - 40px));padding:10px 14px;border:1px solid #efc2be;border-radius:9px;background:#fff1ef;color:#9d3027;font-size:12px}
[hidden]{display:none!important}