:root{
  --bg:#0b141a; --panel:#111b21; --panel2:#202c33; --hover:#2a3942; --line:#222d34;
  --text:#e9edef; --muted:#8696a0; --green:#00a884; --out:#005c4b; --in:#202c33;
  --safe-b:env(safe-area-inset-bottom,0px); --safe-t:env(safe-area-inset-top,0px);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);
  font:15px/1.4 "Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;overscroll-behavior:none}
.hidden{display:none!important}
button{font:inherit;color:inherit;cursor:pointer}
input,textarea{font:inherit;color:var(--text)}

/* login */
.login{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);padding:20px}
.login-card{width:min(340px,100%);background:var(--panel);border-radius:14px;padding:28px;text-align:center}
.login-logo{width:72px;height:72px;border-radius:50%}
.login-card h1{margin:10px 0 4px;font-size:22px}
.login-card p{color:var(--muted);margin:0 0 18px}
.login-card input{width:100%;padding:12px;border-radius:8px;border:1px solid var(--line);background:var(--panel2);
  text-align:center;font-size:20px;letter-spacing:6px;outline:none}
.login-card button{width:100%;margin-top:12px;padding:12px;border:0;border-radius:8px;background:var(--green);color:#fff;font-weight:600}
.login-err{color:#f15c6d;min-height:20px;margin-top:10px}

/* layout */
.app{display:flex;height:100dvh;max-width:1700px;margin:0 auto}
.sidebar{width:380px;min-width:300px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:calc(14px + var(--safe-t)) 18px 10px}
.side-head h1{font-size:22px;margin:0}
.conn{width:10px;height:10px;border-radius:50%;background:var(--muted)}
.conn.ok{background:var(--green)} .conn.bad{background:#f15c6d}
.search{padding:4px 12px 8px}
.search input{width:100%;background:var(--panel2);border:0;border-radius:8px;padding:9px 14px;outline:none}
.agent-list{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1}
.agent{display:flex;gap:12px;align-items:center;padding:10px 16px;cursor:pointer}
.agent:hover{background:var(--panel2)} .agent.active{background:var(--hover)}
.agent-body{flex:1;min-width:0;border-bottom:1px solid var(--line);padding-bottom:10px}
.agent-top{display:flex;justify-content:space-between;gap:8px}
.agent-name{font-size:16.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.agent-time{color:var(--muted);font-size:12px;flex-shrink:0}
.agent-prev{color:var(--muted);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.agent-prev.typing{color:var(--green)}
.avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;font-size:24px;flex-shrink:0;
  background:#2a3942;overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover}

/* chat */
.chat{flex:1;display:flex;flex-direction:column;min-width:0;position:relative;
  background-color:#0b141a;
  background-image:radial-gradient(rgba(255,255,255,.025) 1px,transparent 1px);background-size:22px 22px}
.empty{margin:auto;text-align:center;color:var(--muted);padding:20px}
.empty img{width:96px;opacity:.85;border-radius:50%}
.empty h2{color:var(--text);font-weight:400}
.chat-head{display:flex;align-items:center;gap:12px;background:var(--panel2);padding:calc(8px + var(--safe-t)) 14px 8px;min-height:60px}
.chat-head .avatar{width:40px;height:40px;font-size:20px}
.head-info{flex:1;min-width:0}
.head-name{font-size:16px}
.head-status{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.head-status.typing{color:var(--green)}
.icon{background:none;border:0;font-size:20px;padding:6px 8px;border-radius:50%;color:var(--muted);line-height:1}
.icon:hover{background:var(--hover)}
.back{display:none}

.messages{flex:1;overflow-y:auto;padding:18px 7% 10px;display:flex;flex-direction:column;gap:3px}
.day{align-self:center;background:#182229;color:var(--muted);font-size:12.5px;padding:5px 12px;border-radius:8px;margin:10px 0 6px}
.msg{max-width:min(680px,80%);padding:7px 9px 6px;border-radius:8px;position:relative;word-wrap:break-word;overflow-wrap:anywhere;
  box-shadow:0 1px .5px rgba(0,0,0,.13)}
.msg.in{align-self:flex-start;background:var(--in);border-top-left-radius:0}
.msg.out{align-self:flex-end;background:var(--out);border-top-right-radius:0}
.msg.err{border-left:3px solid #f15c6d}
.msg .meta{float:right;margin:6px 0 -4px 10px;font-size:11px;color:rgba(233,237,239,.6)}
.msg img.att{max-width:100%;max-height:320px;border-radius:6px;display:block;margin-bottom:4px}
.msg img.att.gen{max-height:none;width:100%;height:auto;min-height:60px;margin:6px 0;cursor:zoom-in;background:#111b21}
.msg img.att{cursor:zoom-in}
#viewer{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.94);display:none;align-items:center;justify-content:center}
#viewer.open{display:flex}
#viewer img{max-width:100vw;max-height:100dvh;object-fit:contain}
#viewer .viewer-bar{position:absolute;top:calc(8px + var(--safe-t));right:8px;display:flex;gap:6px}
#viewer .icon{color:#fff;background:rgba(0,0,0,.5);text-decoration:none;width:44px;height:44px;display:grid;place-items:center}
.msg .tools{font-size:12.5px;color:var(--muted);margin-bottom:4px}
.msg .tools summary{cursor:pointer}
.msg .tools div{padding:1px 0 1px 6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.md p{margin:0 0 6px} .md p:last-child{margin-bottom:0}
.md h1,.md h2,.md h3,.md h4{margin:8px 0 4px;font-size:16px}
.md ul,.md ol{margin:2px 0 6px;padding-left:22px}
.md code{background:rgba(0,0,0,.3);padding:1px 4px;border-radius:4px;font-family:Consolas,monospace;font-size:13px}
.md pre{background:rgba(0,0,0,.35);padding:8px 10px;border-radius:6px;overflow-x:auto;margin:4px 0 6px}
.md pre code{background:none;padding:0}
.md a{color:#53bdeb}
.md table{border-collapse:collapse;margin:4px 0 6px;font-size:13.5px;display:block;overflow-x:auto}
.md th,.md td{border:1px solid #3b4a54;padding:4px 7px;text-align:left}
.md blockquote{margin:4px 0;padding-left:8px;border-left:3px solid var(--green);color:#cfd6da}
.md hr{border:0;border-top:1px solid #3b4a54}
.typing-dots span{display:inline-block;width:7px;height:7px;margin:0 2px;border-radius:50%;background:var(--muted);animation:b 1.2s infinite}
.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes b{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}

.composer{background:var(--panel2);padding:8px 12px calc(8px + var(--safe-b))}
.composer-row{display:flex;align-items:flex-end;gap:8px}
.composer textarea{flex:1;resize:none;border:0;outline:none;background:#2a3942;border-radius:10px;padding:10px 14px;max-height:160px}
.send{border:0;background:var(--green);color:#fff;width:44px;height:44px;border-radius:50%;font-size:18px;flex-shrink:0}
.send:disabled{opacity:.5}
.attach{cursor:pointer;padding-bottom:10px}
.previews{display:flex;gap:6px;flex-wrap:wrap}
.previews:not(:empty){padding-bottom:8px}
.previews div{position:relative}
.previews img{height:64px;border-radius:6px}
.previews button{position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;border:0;background:#f15c6d;color:#fff;font-size:12px;line-height:20px;padding:0}

/* celular: lista e chat viram telas separadas, como no WhatsApp */
@media (max-width:760px){
  .sidebar{width:100%;min-width:0;border:0}
  .chat{display:none}
  .app.in-chat .sidebar{display:none}
  .app.in-chat .chat{display:flex}
  .back{display:block}
  .messages{padding:12px 10px 8px}
  .msg{max-width:88%}
}