:root{--bg:#fff;--panel:#fff;--chatbg:#e8eef2;--in:#fff;--out:#d6ecff;--tx:#14202b;--mu:#6b7c8b;--ln:#e4e9ee;--ac:#2f80ed;--hv:#f1f5f9;--red:#e5484d;--green:#2fb457}
@media(prefers-color-scheme:dark){:root{--bg:#0e1621;--panel:#17212b;--chatbg:#0e1621;--in:#1f2c3a;--out:#2b5278;--tx:#e8eef4;--mu:#7d8e9e;--ln:#0e1621;--hv:#202b36}}
*{box-sizing:border-box}html,body{height:100%;margin:0}
body{font:15px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--tx);overscroll-behavior:none}
.hidden{display:none!important}.muted{color:var(--mu);font-size:13px}.grow{flex:1;min-width:0}.err{color:var(--red);min-height:20px;margin-top:8px}
input,textarea{font:inherit;color:inherit;background:var(--hv);border:1px solid transparent;border-radius:12px;padding:10px 14px;width:100%;outline:none}
input:focus,textarea:focus{border-color:var(--ac)}
button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,input:focus-visible{outline:2px solid var(--ac);outline-offset:2px}
.btn{background:var(--ac);color:#fff;border:0;border-radius:12px;padding:10px 18px;font-weight:600}.btn.sec{background:var(--hv);color:var(--tx)}.btn.danger{background:var(--red)}.btn.sm{padding:6px 12px;font-size:13px}
.iconbtn{background:none;border:0;border-radius:50%;width:40px;height:40px;display:grid;place-items:center;flex:none;color:var(--mu)}
.iconbtn:hover{background:var(--hv)}.iconbtn svg{width:22px;height:22px;fill:currentColor}
.center{min-height:100%;display:grid;place-items:center;padding:20px}
.card{width:100%;max-width:380px;display:flex;flex-direction:column;gap:12px;text-align:center}
.card h1{margin:0}.logo{width:84px;height:84px;margin:0 auto;border-radius:50%;background:var(--ac);display:grid;place-items:center}.logo svg{width:44px;height:44px;fill:#fff}
#app{height:100dvh;display:grid;grid-template-columns:360px 1fr}
#side{display:flex;flex-direction:column;border-right:1px solid var(--ln);background:var(--panel);min-height:0}
.shead{display:flex;gap:8px;padding:8px 10px;align-items:center}
#chats{overflow:auto;flex:1}
.pushbar{display:flex;gap:10px;align-items:center;margin:4px 10px;padding:10px;border-radius:12px;background:var(--hv);font-size:13px}
.av{width:48px;height:48px;border-radius:50%;object-fit:cover;display:grid;place-items:center;color:#fff;font-weight:600;font-size:19px;flex:none}
.av.sm{width:36px;height:36px;font-size:15px}.av.xl{width:96px;height:96px;font-size:38px}
.item{display:flex;gap:12px;padding:9px 12px;cursor:pointer;align-items:center;border-radius:12px;margin:0 6px}
.item:hover,.item.on{background:var(--hv)}.item .top{display:flex;justify-content:space-between;gap:8px}.item b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .pv{color:var(--mu);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}.item .tm{color:var(--mu);font-size:12px;flex:none}
.badge{background:var(--ac);color:#fff;border-radius:11px;min-width:22px;height:22px;padding:0 6px;font-size:12px;display:grid;place-items:center;flex:none}
.avw{position:relative;flex:none}.dot{position:absolute;right:1px;bottom:1px;width:12px;height:12px;border-radius:50%;background:var(--green);border:2px solid var(--panel)}
#chat{display:flex;flex-direction:column;background:var(--chatbg);min-width:0;min-height:0}
.empty{margin:auto;color:var(--mu);background:var(--panel);padding:6px 16px;border-radius:16px}
.pane{display:flex;flex-direction:column;height:100%;min-height:0}
.chead{display:flex;align-items:center;gap:10px;padding:8px 12px;background:var(--panel);border-bottom:1px solid var(--ln)}
#back{display:none}
#msgs{flex:1;overflow:auto;padding:12px 14px;display:flex;flex-direction:column;gap:3px}
.m{max-width:min(520px,80%);padding:7px 12px;border-radius:16px;background:var(--in);align-self:flex-start;white-space:pre-wrap;word-break:break-word;border-bottom-left-radius:5px}
.m.me{align-self:flex-end;background:var(--out);border-radius:16px;border-bottom-right-radius:5px}
.m .t{float:right;margin:6px 0 0 12px;font-size:11px;color:var(--mu)}
#form{display:flex;gap:8px;padding:8px 12px calc(8px + env(safe-area-inset-bottom));background:var(--panel);align-items:flex-end}
#form textarea{resize:none;max-height:140px;border-radius:20px}
.send{background:var(--ac);border:0;border-radius:50%;width:42px;height:42px;display:grid;place-items:center;flex:none}.send svg{width:20px;height:20px;fill:#fff}
.callui,.incoming{position:fixed;inset:0;z-index:20;background:#0b121a;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}
.incoming{z-index:30;background:rgba(11,18,26,.96)}
.callui video#rv{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;visibility:hidden}
.callui.video video#rv{visibility:visible}
#lv{display:none;position:absolute;right:16px;top:calc(16px + env(safe-area-inset-top));width:110px;border-radius:14px;z-index:2;background:#000;transform:scaleX(-1)}
.callui.video #lv{display:block}
.cinfo{position:relative;z-index:1;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px;text-shadow:0 1px 6px #0008}
.callui.video #callAv{display:none}
.callui.video .cinfo{position:absolute;top:calc(14px + env(safe-area-inset-top));left:16px;right:140px;align-items:flex-start;text-align:left;gap:0}
.callui.video #callName{font-size:18px}
.callui.video::before,.callui.video::after{content:"";position:absolute;left:0;right:0;pointer-events:none;z-index:1}
.callui.video::before{top:0;height:110px;background:linear-gradient(#000a,#0000)}
.callui.video::after{bottom:0;height:150px;background:linear-gradient(#0000,#000a)}.callui .muted,.incoming .muted{color:#b6c3cf}
#callName,#incName{font-size:24px;font-weight:600}
.ctrl{position:absolute;bottom:calc(36px + env(safe-area-inset-bottom));display:flex;gap:18px;z-index:2}
.outmenu{position:absolute;z-index:3;bottom:calc(112px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:min(300px,90vw);background:#1b2631;border-radius:16px;padding:6px;display:flex;flex-direction:column}
.outmenu button{background:none;border:0;color:#fff;text-align:left;padding:12px 14px;border-radius:12px}
.outmenu button:hover{background:#ffffff1a}.outmenu button.on{color:#6cb2ff;font-weight:600}.outmenu button.on::after{content:" ✓"}
.rb{width:60px;height:60px;border-radius:50%;border:0;background:#ffffff26;color:#fff;display:grid;place-items:center}.rb svg{width:28px;height:28px;fill:#fff}
.rb.off{background:#fff;color:#000}.rb.off svg{fill:#000}.rb.red{background:var(--red)}.rb.green{background:var(--green)}.rb.hang svg{transform:rotate(135deg)}
.modal{position:fixed;inset:0;z-index:40;background:#0008;display:grid;place-items:center;padding:14px}
.mcard{background:var(--panel);border-radius:18px;padding:22px;width:100%;max-width:480px;max-height:90dvh;overflow:auto;position:relative;display:flex;flex-direction:column;gap:12px}
.mcard h3{margin:0}.mcard label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--mu)}.x{position:absolute;right:10px;top:10px;font-size:26px}
.row{display:flex;gap:8px;flex-wrap:wrap}.prow{display:flex;gap:16px;align-items:center}
.urow{display:flex;gap:10px;align-items:center;padding:8px 0;border-top:1px solid var(--ln);flex-wrap:wrap}
.keybox{display:flex;gap:8px;align-items:center;background:var(--hv);padding:10px;border-radius:12px}.keybox code{flex:1;word-break:break-all;font-size:14px}
.toast{position:fixed;left:50%;bottom:80px;transform:translateX(-50%);background:#000c;color:#fff;padding:10px 18px;border-radius:20px;z-index:60}
@media(max-width:800px){#app{grid-template-columns:1fr}#chat{display:none}#app.chat-open #side{display:none}#app.chat-open #chat{display:flex}#back{display:grid}}
@media(prefers-reduced-motion:no-preference){.m{animation:pop .12s ease-out}@keyframes pop{from{transform:scale(.96);opacity:.5}}}