:root{
  --rail:#1e1f22; --side:#2b2d31; --main:#313338; --hover:#35373c;
  --text:#dbdee1; --muted:#949ba4; --brand:#5865f2; --line:#3f4147;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font:15px/1.5 "gg sans","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text);background:var(--main);overflow:hidden;-webkit-font-smoothing:antialiased;
}
#app{display:flex;height:100dvh}
.hidden{display:none!important}
.spacer{flex:1}

.rail{width:72px;background:var(--rail);display:flex;flex-direction:column;align-items:center;padding:12px 0;gap:8px;flex:0 0 auto}
.guild{width:48px;height:48px;border-radius:16px;background:#313338;display:grid;place-items:center;font-weight:600;cursor:pointer;transition:.15s;border:none;color:var(--text);font-size:16px}
.guild:hover{border-radius:14px;background:var(--brand)}
.guild.active{border-radius:14px;background:var(--brand);color:#fff}
.guild.add{background:#313338;color:#23a55a;font-size:20px}
.rail-sep{width:32px;height:2px;background:#35373c;border-radius:1px}

.sidebar{width:240px;background:var(--side);display:flex;flex-direction:column;flex:0 0 auto}
.sidebar-head{height:48px;display:flex;align-items:center;padding:0 16px;font-weight:600;font-size:15px;border-bottom:1px solid #26272b;box-shadow:0 1px 0 rgba(0,0,0,.2)}
.ch-label{padding:16px 8px 4px 16px;font-size:12px;font-weight:700;letter-spacing:.02em;color:var(--muted);text-transform:uppercase}
.channels{flex:1;overflow-y:auto;padding:0 8px}
.ch{display:flex;align-items:center;gap:6px;padding:7px 8px;border-radius:4px;color:var(--muted);cursor:pointer;font-size:15px;font-weight:500;margin-bottom:1px}
.ch:hover{background:var(--hover);color:var(--text)}
.ch.active{background:#404249;color:#fff}
.ch .hash{color:#80848e;font-size:18px;line-height:1}
.ch .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.add-ch{margin:4px 8px 8px;padding:7px 8px;background:none;border:none;color:var(--muted);text-align:left;border-radius:4px;cursor:pointer;font-size:14px;font-family:inherit}
.add-ch:hover{background:var(--hover);color:var(--text)}
.me{margin-top:auto;background:#232428;padding:8px;display:flex;align-items:center;gap:8px}
.avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700;color:#fff;flex:0 0 auto}
.me-av{background:var(--brand)}
.me-txt{display:flex;flex-direction:column;line-height:1.2;overflow:hidden;min-width:0}
.me-txt b{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.me-txt small{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ok{color:#23a55a!important}.bad{color:#f23f43!important}

.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--main)}
.topbar{height:48px;display:flex;align-items:center;gap:8px;padding:0 16px;border-bottom:1px solid #26272b;box-shadow:0 1px 0 rgba(0,0,0,.2);flex:0 0 auto}
.topbar h2{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar .hash{color:#80848e;font-size:20px}
.icon-btn{background:none;border:none;color:#b5bac1;font-size:18px;cursor:pointer;padding:4px 8px;border-radius:4px;font-family:inherit}
.icon-btn:hover{background:var(--hover)}
.only-mobile{display:none}

.messages{flex:1;overflow-y:auto;padding:16px 0 8px;overscroll-behavior:contain}
.msg{display:flex;gap:16px;padding:2px 16px;position:relative}
.msg:hover{background:rgba(4,4,5,.07)}
.msg .avatar{width:40px;height:40px;margin-top:2px;font-size:15px}
.msg-body{flex:1;min-width:0}
.msg-head{display:flex;align-items:baseline;gap:8px;margin-bottom:1px}
.msg-head b{font-size:15px}
.msg-head time{font-size:12px;color:var(--muted)}
.msg-text{white-space:pre-wrap;word-wrap:break-word;font-size:15px;line-height:1.45}
.msg-text a{color:#00a8fc;text-decoration:none}
.msg-text a:hover{text-decoration:underline}
.msg-text code{background:#2b2d31;padding:1px 5px;border-radius:4px;font-size:13px;font-family:ui-monospace,Consolas,monospace}
.msg-text pre{background:#2b2d31;border:1px solid #26272b;padding:10px 12px;border-radius:6px;margin:6px 0;overflow-x:auto}
.msg-text pre code{background:none;padding:0;font-size:13px;line-height:1.45}
.msg.system{color:var(--muted);font-style:italic;padding:4px 16px 4px 72px;font-size:14px}
.msg.err .msg-text{color:#f8a3a6}
.typing::after{content:"\258D";animation:blink 1s steps(2) infinite;color:#b5bac1}
@keyframes blink{50%{opacity:0}}

.composer{padding:0 16px 20px;display:flex;gap:10px;align-items:flex-end;flex:0 0 auto}
#input{flex:1;background:#383a40;border:none;border-radius:8px;color:var(--text);padding:11px 14px;font:inherit;resize:none;max-height:180px;outline:none}
#input::placeholder{color:#6d6f78}
#input:focus{box-shadow:0 0 0 1px var(--brand)}
.send-btn{background:var(--brand);border:none;color:#fff;padding:11px 18px;border-radius:8px;font:inherit;font-weight:500;cursor:pointer}
.send-btn:hover{background:#4752c4}
.send-btn:disabled{opacity:.5;cursor:not-allowed}

.login{position:fixed;inset:0;background:var(--main);display:grid;place-items:center;z-index:50}
.login-box{background:var(--side);padding:28px;border-radius:12px;width:min(340px,90vw);display:flex;flex-direction:column;gap:12px}
.login-box h1{font-size:22px;text-align:center}
.login-box p{color:var(--muted);font-size:13px;text-align:center}
.login-box input{background:var(--rail);border:none;border-radius:6px;padding:11px;color:var(--text);font:inherit;outline:none}
.login-box input:focus{box-shadow:0 0 0 1px var(--brand)}
.login-box button{background:var(--brand);border:none;border-radius:6px;padding:11px;color:#fff;font:inherit;font-weight:600;cursor:pointer}
.login-err{color:#f23f43;font-size:12px;text-align:center;min-height:14px}

/* 思考过程折叠块 */
.think{
  margin:4px 0 8px;border-left:2px solid #4b4d55;padding:0 0 0 10px;
  font-size:13px;color:var(--muted);
}
.think.live{border-left-color:#5865f2}
.think summary{
  cursor:pointer;list-style:none;color:#8a8f98;font-size:12.5px;
  padding:2px 0;user-select:none;
}
.think summary::-webkit-details-marker{display:none}
.think summary::before{content:"\25B8";display:inline-block;margin-right:5px;transition:transform .15s}
.think[open] summary::before{transform:rotate(90deg)}
.think.live summary .tw::after{content:"";animation:dots 1.2s steps(4) infinite;display:inline-block;width:10px;text-align:left}
@keyframes dots{0%{content:""}25%{content:"."}50%{content:".."}75%{content:"..."}100%{content:""}}
.think-body{
  white-space:pre-wrap;word-wrap:break-word;font-size:12.5px;line-height:1.5;
  color:#8a8f98;max-height:320px;overflow-y:auto;padding:4px 0 2px;
  font-family:ui-monospace,"SF Mono",Consolas,monospace;
}
.icon-btn.on{color:#5865f2;background:#3c3f45}

@media (max-width:768px){
  .rail{width:56px}
  .guild{width:40px;height:40px;border-radius:12px;font-size:14px}
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:30;transform:translateX(-100%);transition:transform .2s;box-shadow:2px 0 12px rgba(0,0,0,.3);padding-top:env(safe-area-inset-top)}
  .sidebar.open{transform:none}
  .only-mobile{display:block}
  .msg{gap:10px;padding:2px 12px}
  .msg .avatar{width:34px;height:34px;font-size:13px}
  .composer{padding-bottom:calc(16px + env(safe-area-inset-bottom));padding-left:12px;padding-right:12px}
  .messages{padding-left:0;padding-right:0}
}