:root{--bg:#f0f2f5;--panel:#fff;--text:#111b21;--muted:#667781;--accent:#00a884;--out:#d9fdd3;--in:#fff;--line:#e9edef;--chat:#efeae2}
body.dark{--bg:#111b21;--panel:#202c33;--text:#e9edef;--muted:#8696a0;--out:#005c4b;--in:#202c33;--line:#2a3942;--chat:#0b141a}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Segoe UI,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}
.hidden{display:none!important}.grow{flex:1;min-width:0}.muted{color:var(--muted)}.tiny{font-size:12px;color:var(--muted)}
button{border:0;background:none;font-size:18px;cursor:pointer;color:var(--text);padding:6px 8px;border-radius:8px}
button:hover{background:rgba(128,128,128,.15)}
button.primary{background:var(--accent);color:#fff;font-size:15px;padding:10px 16px}
button.ghost{font-size:14px;color:var(--accent)}
input,select,textarea{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px;width:100%;outline:none}
.auth{display:flex;align-items:center;justify-content:center;height:100vh}
.card{background:var(--panel);padding:28px;border-radius:14px;width:min(380px,92vw);display:flex;flex-direction:column;gap:10px;box-shadow:0 8px 30px rgba(0,0,0,.15);max-height:90vh;overflow:auto}
.card h1,.card h2,.card h3{margin:0}
.logo{width:56px;height:56px;border-radius:16px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px}
.logo.big{width:90px;height:90px;font-size:36px;margin:auto}
.err{color:#d33;font-size:14px;min-height:18px;font-weight:600}
.auth{overflow:auto;padding:12px}
.app{display:flex;height:100vh;max-width:1500px;margin:auto;background:var(--panel)}
#side{width:380px;border-right:1px solid var(--line);display:flex;flex-direction:column;position:relative}
#side header,#chatHead{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--panel);border-bottom:1px solid var(--line);position:relative;min-height:62px}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;flex:none;background-size:cover;background-position:center}
.search{padding:8px 12px}
#chatList{overflow:auto;flex:1}
.item{display:flex;gap:12px;padding:11px 14px;cursor:pointer;align-items:center;border-bottom:1px solid var(--line)}
.item:hover,.item.active{background:rgba(128,128,128,.12)}
.item .top{display:flex;justify-content:space-between;gap:6px}
.item .nm{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .pv{font-size:13.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge{background:var(--accent);color:#fff;border-radius:12px;min-width:20px;height:20px;font-size:12px;display:inline-flex;align-items:center;justify-content:center;padding:0 6px}
#main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
.empty{margin:auto;text-align:center}
#chat{display:flex;flex-direction:column;height:100%;position:relative}
#messages{flex:1;overflow:auto;padding:14px 6%;background:var(--chat);display:flex;flex-direction:column;gap:3px}
.msg{max-width:72%;padding:6px 9px 4px;border-radius:9px;position:relative;box-shadow:0 1px 1px rgba(0,0,0,.13);word-wrap:break-word;white-space:pre-wrap}
.msg.in{background:var(--in);align-self:flex-start}.msg.out{background:var(--out);align-self:flex-end}
.msg .who{font-size:12.5px;font-weight:600;color:var(--accent)}
.msg .meta{font-size:11px;color:var(--muted);text-align:right;margin-left:12px;float:right;margin-top:4px;white-space:nowrap}
.msg .tick.read{color:#34b7f1}
.msg.del{font-style:italic;color:var(--muted)}
.msg .rp{border-left:4px solid var(--accent);background:rgba(128,128,128,.15);padding:4px 8px;border-radius:5px;font-size:13px;margin-bottom:4px;cursor:pointer}
.msg .fw{font-size:11px;color:var(--muted);font-style:italic}
.msg img,.msg video{max-width:280px;max-height:300px;border-radius:7px;display:block}
.msg audio{max-width:240px}
.msg a.file{display:block;padding:8px;background:rgba(128,128,128,.15);border-radius:7px;color:inherit}
.msg .react{display:inline-flex;gap:4px;background:var(--panel);border-radius:12px;padding:1px 6px;font-size:13px;margin:3px 3px 0 0;box-shadow:0 1px 2px rgba(0,0,0,.2);cursor:pointer}
.msg.hl{outline:2px solid var(--accent)}
.sys{align-self:center;background:rgba(128,128,128,.25);padding:3px 10px;border-radius:8px;font-size:12px;margin:5px 0}
.day{align-self:center;background:var(--panel);padding:3px 10px;border-radius:8px;font-size:12px;margin:6px 0;color:var(--muted)}
#composer{display:flex;gap:6px;padding:10px;background:var(--panel);align-items:center;border-top:1px solid var(--line)}
#composer input[type=text],#text{flex:1;border-radius:20px}
#replyBar{display:flex;padding:8px 14px;background:var(--panel);border-left:4px solid var(--accent);font-size:13px;gap:8px;align-items:center}
#locked{padding:14px;text-align:center;background:var(--panel)}
#msgSearchBar{padding:8px;background:var(--panel)}
#emojiPanel{position:absolute;bottom:64px;left:10px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px;display:grid;grid-template-columns:repeat(8,1fr);gap:2px;width:310px;box-shadow:0 4px 18px rgba(0,0,0,.25);z-index:5}
#emojiPanel span{font-size:22px;cursor:pointer;text-align:center;border-radius:6px}
#emojiPanel span:hover{background:rgba(128,128,128,.2)}
.popmenu{position:absolute;background:var(--panel);border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.3);z-index:20;min-width:200px;overflow:hidden;right:10px;top:54px}
.popmenu div{padding:10px 16px;cursor:pointer;font-size:14px}
.popmenu div:hover{background:rgba(128,128,128,.15)}
#ctx{position:fixed;right:auto;top:auto}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:50}
.row{display:flex;gap:8px;align-items:center}
.member{display:flex;gap:10px;align-items:center;padding:6px 0}
.code{font-size:30px;letter-spacing:6px;font-weight:700;text-align:center;color:var(--accent)}
.back{display:none}
.rec{color:#e33;animation:b 1s infinite}
@keyframes b{50%{opacity:.3}}
@media(max-width:760px){#side{width:100%}#main{position:absolute;inset:0;background:var(--panel);transform:translateX(100%);transition:.2s}.app.chatopen #main{transform:none}.back{display:block}.msg{max-width:88%}#messages{padding:10px 3%}}
.auth{align-items:flex-start;height:100vh;overflow:auto}
.auth .card{margin:auto;max-height:none;overflow:visible}
@media(max-height:560px){.auth .card{padding:16px;gap:6px}.auth .card p,.auth .logo{display:none}}