:root{
  --wa-green:#17312B; --wa-teal:#1E5A4C; --bg:#ece5dd; --bubble-in:#ffffff;
  --bubble-out:#dcf8c6; --border:#ddd; --text:#222; --muted:#777; --danger:#c0392b;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:#f4f4f4}
button{cursor:pointer;border:1px solid var(--border);background:#fff;border-radius:6px;padding:6px 12px}
button.primary{background:var(--wa-teal);color:#fff;border-color:var(--wa-teal)}
button.danger{color:var(--danger)}
input,select,textarea{border:1px solid var(--border);border-radius:6px;padding:7px 9px;font-size:14px;width:100%}
textarea{resize:vertical}
.hidden{display:none!important}

/* 登录页 */
.login-wrap{max-width:360px;margin:12vh auto;background:#fff;padding:28px;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.08)}
.login-wrap h1{font-size:20px;margin:0 0 18px;text-align:center;color:var(--wa-green)}
.login-wrap .field{margin-bottom:14px}
.login-wrap label{display:block;font-size:13px;color:var(--muted);margin-bottom:5px}
.login-error{color:var(--danger);font-size:13px;min-height:18px;margin-bottom:8px}

/* 主布局 */
.topbar{display:flex;align-items:center;gap:12px;background:var(--wa-green);color:#fff;padding:8px 14px}
.topbar .title{font-weight:600}
.topbar .spacer{flex:1}
.topbar button{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.layout{display:flex;height:calc(100vh - 45px)}
.pane-conv{width:320px;border-right:1px solid var(--border);background:#fff;display:flex;flex-direction:column}
.pane-chat{flex:1;display:flex;flex-direction:column;background:var(--bg);min-width:0}
.pane-profile{width:280px;border-left:1px solid var(--border);background:#fff;padding:14px;overflow-y:auto}
.pane-profile h3{margin:0 0 10px;font-size:15px}
.pane-profile .row{margin-bottom:10px;font-size:13px}
.pane-profile .row label{display:block;color:var(--muted);margin-bottom:4px}

.search-box{padding:10px;border-bottom:1px solid var(--border)}
.conv-list{overflow-y:auto;flex:1}
.conv-item{padding:10px 12px;border-bottom:1px solid #f0f0f0;cursor:pointer}
.conv-item:hover{background:#f7f7f7}
.conv-item.active{background:#e8f5f2}
.conv-item .line1{display:flex;justify-content:space-between;align-items:center}
.conv-item .name{font-weight:600;font-size:14px}
.conv-item .time{font-size:11px;color:var(--muted)}
.conv-item .preview{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.badge{display:inline-block;min-width:18px;text-align:center;background:#25d366;color:#fff;border-radius:9px;font-size:11px;padding:1px 5px}
.tag{display:inline-block;background:#eef3f2;color:#17312B;border-radius:4px;font-size:11px;padding:1px 6px;margin-right:4px}
.agent-name{font-size:11px;color:var(--muted)}

.chat-head{padding:10px 14px;background:#f0f0f0;border-bottom:1px solid var(--border);font-weight:600;font-size:14px;display:flex;justify-content:space-between;align-items:center}
.messages{flex:1;overflow-y:auto;padding:14px}
.msg{max-width:72%;margin-bottom:10px;padding:8px 10px;border-radius:8px;font-size:14px;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.msg.in{background:var(--bubble-in);margin-right:auto}
.msg.out{background:var(--bubble-out);margin-left:auto}
.msg .trans{margin-top:5px;padding-top:5px;border-top:1px dashed #bbb;font-size:13px;color:#444}
.msg .meta{font-size:11px;color:var(--muted);margin-top:4px;text-align:right}
.msg .draft{font-size:12px;color:#666}
.status-failed{color:var(--danger)}
.compose{border-top:1px solid var(--border);background:#f0f0f0;padding:10px}
.compose textarea{min-height:56px}
.compose .actions{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.preview-box{background:#fff;border:1px solid var(--wa-teal);border-radius:8px;padding:10px;margin-top:8px}
.preview-box .lbl{font-size:12px;color:var(--wa-teal);margin-bottom:6px}
.untranslated{color:#b8860b;font-size:12px}
.empty-hint{color:var(--muted);text-align:center;margin-top:40px;font-size:14px}

/* 管理 */
.admin-view{padding:16px;overflow-y:auto;background:#fff;flex:1}
.admin-view table{border-collapse:collapse;width:100%;font-size:13px}
.admin-view th,.admin-view td{border:1px solid var(--border);padding:6px 8px;text-align:left}
.admin-view h2{font-size:16px;margin:4px 0 12px}
.inline-form{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.inline-form input,.inline-form select{width:auto}
.navbtn.active{background:#fff;color:var(--wa-green);font-weight:700}

@media(max-width:900px){
  .pane-profile{display:none}
  .pane-profile.open{display:block;position:fixed;right:0;top:45px;bottom:0;z-index:20;box-shadow:-2px 0 10px rgba(0,0,0,.15)}
}
@media(max-width:640px){
  .pane-conv{width:100%}
  .pane-chat{display:none}
  body.chat-open .pane-conv{display:none}
  body.chat-open .pane-chat{display:flex}
}