:root{--bg:#0b1c20;--panel:#10272c;--panel2:#15343a;--line:rgba(214,239,235,.09);--text:#e8f2ef;--muted:#8da8a5;--accent:#55c6a2;--accent2:#2d9c80;--danger:#ff8d8d}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 20% 0%,#173c3e 0%,var(--bg) 52%);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:100vh}.hidden{display:none!important}.muted{color:var(--muted)}.tiny{font-size:12px}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.auth-card{width:min(100%,420px);background:rgba(16,39,44,.94);border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:0 24px 80px #0005;text-align:center}.brand-mark,.brand-small{display:grid;place-items:center;background:linear-gradient(145deg,#75dfba,#238c79);color:#092b29;font-weight:900}.brand-mark{width:58px;height:58px;border-radius:18px;margin:auto;font-size:30px}.auth-card h1{font-size:25px;margin:17px 0 4px}.auth-card>p{margin:0 0 22px}.tabs{display:flex;background:#0b1e22;border-radius:12px;padding:4px;margin:22px 0;text-align:center}.tab{flex:1;border:0;background:transparent;color:var(--muted);padding:11px;border-radius:9px;cursor:pointer}.tab.active{background:#20474a;color:#dff8ed}label{display:block;text-align:left;font-size:13px;color:#b7cfca;margin:15px 0}input{width:100%;margin-top:8px;padding:13px 14px;border-radius:10px;border:1px solid var(--line);background:#0b1e22;color:var(--text);outline:none}input:focus,textarea:focus{border-color:#55c6a2}.primary{border:0;background:linear-gradient(135deg,#61d6ac,#299b83);color:#082b27;font-weight:800;border-radius:10px;padding:13px 18px;cursor:pointer}.full{width:100%;margin-top:8px}.error{min-height:22px;color:var(--danger);font-size:13px;margin-top:12px}.app{height:100dvh;min-height:540px;max-width:1500px;margin:auto;display:grid;grid-template-columns:285px 1fr;background:rgba(9,27,31,.45);border-inline:1px solid var(--line)}.sidebar{background:rgba(13,34,38,.9);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:22px 15px 14px;min-height:0}.side-head{display:flex;align-items:center;gap:12px;padding:0 8px 26px}.brand-small{width:42px;height:42px;border-radius:13px;font-size:23px}.side-head b,.side-head small{display:block}.side-head small{font-size:11px;color:var(--muted);margin-top:4px}.nav-item{display:flex;align-items:center;gap:12px;width:100%;border:0;border-radius:11px;padding:13px 14px;background:transparent;color:#c4d8d3;text-align:left;cursor:pointer}.nav-item.selected{background:#1b4142;color:#eafff6}.nav-item span:first-child{font-size:20px}.online-dot{width:8px;height:8px;border-radius:50%;background:#5bd5a6;display:inline-block;box-shadow:0 0 10px #5bd5a655}.nav-item .online-dot{margin-left:auto}.section-title{font-size:11px;letter-spacing:.08em;color:#789592;margin:27px 10px 10px;text-transform:uppercase;display:flex;justify-content:space-between}.user-list{overflow:auto;flex:1}.user-row{width:100%;display:flex;align-items:center;gap:10px;padding:10px;border:0;border-radius:10px;background:transparent;color:var(--text);text-align:left;cursor:pointer}.user-row:hover,.user-row.active{background:#193a3e}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#285b54;color:#d8fff0;font-weight:700;flex:none}.user-meta{min-width:0}.user-meta b{display:block;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-meta small{color:var(--muted);font-size:11px}.empty-side{color:#78918d;font-size:12px;padding:12px}.side-bottom{border-top:1px solid var(--line);padding:15px 4px 0;display:flex;align-items:center;gap:10px}.my-avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#286e5e;font-weight:800}.my-info{flex:1;min-width:0}.my-info b,.my-info small{display:block}.my-info b{font-size:13px}.my-info small{font-size:11px;color:var(--muted);margin-top:3px}.icon-btn{border:0;background:transparent;color:#a8c4bd;font-size:21px;cursor:pointer}.chat-panel{display:flex;flex-direction:column;min-width:0;min-height:0}.chat-head{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;flex:none}.chat-head h2{font-size:17px;margin:0 0 5px}.chat-head p{font-size:12px;color:var(--muted);margin:0}.head-status{display:flex;align-items:center;gap:8px;color:#8fb0a6;font-size:12px}.messages{flex:1;overflow-y:auto;padding:26px clamp(15px,4vw,55px);display:flex;flex-direction:column;gap:15px}.welcome{text-align:center;margin:auto;color:var(--muted)}.welcome-icon{font-size:30px;color:var(--accent)}.welcome h3{color:#d9eee7;font-size:16px;margin:12px 0 6px}.welcome p{font-size:12px}.message{display:flex;gap:10px;max-width:min(78%,680px);align-items:flex-start}.message.mine{align-self:flex-end;flex-direction:row-reverse}.message .avatar{width:31px;height:31px;font-size:12px}.bubble-wrap{min-width:0}.message.mine .bubble-wrap{text-align:right}.msg-meta{font-size:11px;color:#83a19b;margin:0 0 6px}.bubble{display:inline-block;text-align:left;padding:11px 14px;border-radius:4px 14px 14px 14px;background:#19383c;color:#e0efea;font-size:14px;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere}.mine .bubble{background:#205b4e;border-radius:14px 4px 14px 14px}.composer{margin:0 28px;padding:12px;display:flex;align-items:flex-end;gap:10px;border:1px solid var(--line);background:#102a2e;border-radius:14px}.composer textarea{flex:1;resize:none;max-height:120px;border:0;outline:0;background:transparent;color:var(--text);font:inherit;font-size:14px;line-height:1.5;padding:5px 7px}.composer textarea::placeholder{color:#6f8c87}.send-btn{border:0;background:#4dc49d;color:#082c27;border-radius:10px;padding:10px 18px;font-weight:800;cursor:pointer}.send-btn:disabled,.composer textarea:disabled{opacity:.45;cursor:not-allowed}.composer-note{text-align:center;color:#67827d;font-size:10px;padding:9px 0 12px}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);opacity:0;background:#204b45;color:#eafff6;padding:11px 18px;border-radius:10px;font-size:13px;transition:.2s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:720px){.app{grid-template-columns:76px 1fr}.sidebar{padding:15px 8px}.side-head{justify-content:center;padding:0 0 22px}.side-head>div:last-child,.nav-item span:nth-child(2),.nav-item .online-dot,.section-title,.user-meta,.side-bottom .my-info,.icon-btn{display:none}.nav-item{justify-content:center;padding:13px 0}.user-row{justify-content:center;padding:8px 0}.side-bottom{justify-content:center;padding-top:12px}.chat-head{height:72px;padding:0 15px}.head-status span{display:none}.messages{padding:18px 12px}.message{max-width:92%}.composer{margin:0 10px;padding:8px}.send-btn{padding:10px 13px}.composer-note{font-size:9px}.auth-card{padding:26px 22px}}