:root{
  --blue:#2563eb; --bg:#f3f5f9; --line:#e6e9f0; --text:#1f2733; --muted:#8b94a6;
  --panel:#fff; --green:#16a34a;
}
*{box-sizing:border-box;}
html,body{height:100%;margin:0;}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:14px;}

/* ---------- 登录 ---------- */
.login-wrap{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef2ff,#e0f2fe);}
.login-wrap[hidden]{display:none;}
.login-card{width:360px;background:#fff;border-radius:16px;padding:34px 30px;box-shadow:0 20px 60px rgba(30,60,140,.18);}
.login-logo{font-size:26px;font-weight:700;color:var(--blue);}
.login-sub{color:var(--muted);margin:6px 0 22px;font-size:13px;}
.login-card label{display:block;font-size:12px;color:var(--muted);margin:12px 0 5px;}
.login-card input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;outline:none;transition:.15s;}
.login-card input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
#login-btn{width:100%;margin-top:20px;padding:11px;border:none;background:var(--blue);color:#fff;border-radius:9px;font-size:15px;cursor:pointer;transition:.15s;}
#login-btn:hover{filter:brightness(1.05);}
.login-error{color:#dc2626;font-size:12px;margin-top:10px;min-height:14px;}
.login-hint{margin-top:18px;font-size:12px;color:var(--muted);text-align:center;}
.login-hint code{background:#f1f3f8;padding:1px 5px;border-radius:4px;}

/* ---------- 布局 ---------- */
#app{display:grid;grid-template-columns:300px 1fr 280px;height:100vh;overflow:hidden;}
#app[hidden]{display:none;}

/* 左侧 */
#sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;}
.side-head{padding:14px 16px;border-bottom:1px solid var(--line);}
.brand{font-weight:700;font-size:15px;}
.me{display:flex;align-items:center;gap:8px;margin-top:10px;font-size:13px;color:var(--muted);}
.avatar{width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:12px;}
#me-name{color:var(--text);font-weight:600;flex:1;}
#logout{margin-left:auto;border:none;background:none;cursor:pointer;color:var(--muted);font-size:15px;}
.conv-tabs{display:flex;gap:6px;padding:10px 12px;border-bottom:1px solid var(--line);}
.tab{flex:1;padding:7px;border:none;background:#f1f3f8;border-radius:8px;cursor:pointer;color:var(--muted);font-size:13px;}
.tab.active{background:var(--blue);color:#fff;}
.conv-list{flex:1;overflow-y:auto;}
.conv{padding:12px 14px;border-bottom:1px solid #f3f5f9;cursor:pointer;display:flex;gap:10px;align-items:flex-start;transition:.12s;}
.conv:hover{background:#f8faff;}
.conv.active{background:#eef4ff;border-left:3px solid var(--blue);}
.conv .c-avatar{width:38px;height:38px;border-radius:50%;background:#dbe4ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0;}
.conv .c-main{flex:1;min-width:0;}
.conv .c-top{display:flex;justify-content:space-between;align-items:center;}
.conv .c-name{font-weight:600;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.conv .c-time{font-size:11px;color:var(--muted);flex-shrink:0;margin-left:6px;}
.conv .c-last{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:3px;}
.badge{background:#ef4444;color:#fff;border-radius:10px;font-size:11px;min-width:18px;height:18px;padding:0 5px;display:inline-flex;align-items:center;justify-content:center;margin-left:6px;}
.side-foot{padding:10px 12px;border-top:1px solid var(--line);display:flex;gap:8px;}
.ghost{border:1px solid var(--line);background:#fff;color:var(--text);padding:7px 10px;border-radius:8px;cursor:pointer;font-size:12.5px;flex:1;}
.ghost:hover{border-color:var(--blue);color:var(--blue);}

/* 中间 */
#chat{display:flex;flex-direction:column;background:var(--bg);overflow:hidden;}
.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);}
.chat-empty .big{font-size:54px;margin-bottom:8px;}
.chat-head{padding:14px 20px;border-bottom:1px solid var(--line);background:#fff;display:flex;justify-content:space-between;align-items:center;}
.chat-title{font-weight:700;font-size:15px;}
.chat-sub{font-size:12px;color:var(--muted);margin-top:3px;}
.chat-actions{display:flex;gap:8px;align-items:center;}
#assign-select{padding:6px 8px;border:1px solid var(--line);border-radius:8px;font-size:12.5px;}
.messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px;}
.msg{display:flex;gap:8px;max-width:74%;}
.msg .m-av{width:30px;height:30px;border-radius:50%;background:#cdd8f3;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;}
.msg .bubble{padding:9px 13px;border-radius:12px;font-size:14px;line-height:1.55;word-break:break-word;white-space:pre-wrap;}
.msg.agent{align-self:flex-end;flex-direction:row-reverse;}
.msg.agent .m-av{background:var(--blue);color:#fff;}
.msg.visitor .bubble{background:#fff;border:1px solid #eef0f5;}
.msg.agent .bubble{background:var(--blue);color:#fff;}
.msg.system{align-self:center;max-width:90%;}
.msg.system .bubble{background:#fff7e6;color:#b45309;font-size:12px;padding:5px 12px;border-radius:20px;}
.typing{font-size:12px;color:var(--muted);padding:0 20px 6px;height:18px;}
.composer{border-top:1px solid var(--line);background:#fff;padding:10px 14px;}
.composer-tools{margin-bottom:8px;position:relative;}
.tool{border:1px solid var(--line);background:#fff;border-radius:7px;padding:4px 10px;font-size:12px;cursor:pointer;color:var(--muted);}
.canned-pop{position:absolute;bottom:34px;left:0;width:280px;max-height:220px;overflow-y:auto;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12);z-index:5;}
.canned-pop div{padding:9px 12px;font-size:13px;cursor:pointer;border-bottom:1px solid #f3f5f9;}
.canned-pop div:hover{background:#f5f8ff;}
.composer textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;resize:none;outline:none;height:60px;}
.composer textarea:focus{border-color:var(--blue);}
.send{margin-top:8px;width:100%;padding:10px;border:none;background:var(--blue);color:#fff;border-radius:9px;font-size:14px;cursor:pointer;}
.send:hover{filter:brightness(1.05);}

/* 右侧 */
#inspector{background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;}
.insp-section{border-bottom:1px solid var(--line);padding:16px;}
.insp-h{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;font-weight:600;}
.insp-body .row{display:flex;justify-content:space-between;padding:6px 0;font-size:13px;border-bottom:1px dashed #f0f2f6;}
.insp-body .row span:first-child{color:var(--muted);}
.muted{color:var(--muted);}
.track .t{display:flex;gap:8px;padding:7px 0;font-size:12.5px;border-bottom:1px solid #f3f5f9;}
.track .t .dot{width:7px;height:7px;border-radius:50%;background:var(--blue);margin-top:5px;flex-shrink:0;}
.track .t .t-url{color:var(--text);word-break:break-all;}
.track .t .t-time{color:var(--muted);font-size:11px;margin-top:2px;}

/* 弹窗 */
.modal{position:fixed;inset:0;background:rgba(20,30,50,.4);display:flex;align-items:center;justify-content:center;z-index:50;}
.modal[hidden]{display:none;}
.modal-card{width:440px;max-width:92vw;max-height:84vh;overflow:hidden;background:#fff;border-radius:14px;display:flex;flex-direction:column;}
.modal-head{padding:14px 18px;border-bottom:1px solid var(--line);font-weight:600;display:flex;justify-content:space-between;align-items:center;}
.modal-head .x{border:none;background:none;font-size:16px;cursor:pointer;color:var(--muted);}
.modal-list{overflow-y:auto;padding:6px 0;max-height:46vh;}
.modal-list .item{display:flex;justify-content:space-between;align-items:center;padding:10px 18px;border-bottom:1px solid #f3f5f9;font-size:13px;}
.modal-list .item .del{color:#dc2626;border:none;background:none;cursor:pointer;font-size:12px;}
.modal-form{display:flex;gap:6px;padding:12px 18px;border-top:1px solid var(--line);flex-wrap:wrap;}
.modal-form input,.modal-form select{flex:1;min-width:80px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:13px;outline:none;}
.modal-form button{padding:8px 16px;border:none;background:var(--blue);color:#fff;border-radius:8px;cursor:pointer;}
.online-dot{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block;margin-right:5px;}
.offline-dot{width:8px;height:8px;border-radius:50%;background:#cbd2e0;display:inline-block;margin-right:5px;}