:root{--g:#128c7e;--gd:#0b6b60;--bg:#f4f6f8;--card:#fff;--tx:#1c2430;--mu:#6b7785;--bd:#e3e8ee;--red:#c62828;--amber:#b26a00}
*{box-sizing:border-box}
body{margin:0;font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--tx)}
a{color:var(--g);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:22px;margin:0 0 18px}h2{font-size:16px;margin:0 0 10px}
.shell{display:flex;min-height:100vh}
.side{width:210px;background:#0f2a2e;color:#cfe3e1;padding:16px 0;display:flex;flex-direction:column;flex-shrink:0}
.brand{font-weight:700;color:#fff;padding:0 18px 16px;font-size:16px}
.side nav a{display:flex;justify-content:space-between;align-items:center;padding:10px 18px;color:#cfe3e1}
.side nav a:hover{background:#17393e;text-decoration:none}
.side nav a.on{background:var(--g);color:#fff}
.badge{background:#ff5252;color:#fff;border-radius:10px;padding:0 7px;font-size:11px}
.me{margin-top:auto;padding:16px 18px;font-size:12px;color:#9bb8b5}.me a{color:#fff}
.main{flex:1;padding:22px 26px;min-width:0}
.card{background:var(--card);border:1px solid var(--bd);border-radius:10px;padding:16px;margin-bottom:16px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));margin-bottom:16px}
.stat{background:var(--card);border:1px solid var(--bd);border-radius:10px;padding:14px}
.stat b{display:block;font-size:26px}.stat span{color:var(--mu);font-size:12px}
table{width:100%;border-collapse:collapse;background:var(--card)}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--bd);vertical-align:top}
th{font-size:12px;text-transform:uppercase;color:var(--mu);letter-spacing:.03em}
.tablewrap{overflow-x:auto;border:1px solid var(--bd);border-radius:10px;background:#fff;margin-bottom:16px}
.tablewrap table{margin:0}
input,select,textarea{width:100%;padding:8px 10px;border:1px solid var(--bd);border-radius:6px;font:inherit;background:#fff}
textarea{min-height:80px}
label{display:block;margin-bottom:10px;font-weight:600;font-size:13px}
label input,label select,label textarea{margin-top:4px;font-weight:400}
.btn{background:var(--g);color:#fff;border:0;border-radius:6px;padding:9px 16px;cursor:pointer;font:inherit;font-weight:600;display:inline-block}
.btn:hover{background:var(--gd);text-decoration:none}
.btn.alt{background:#fff;color:var(--g);border:1px solid var(--g)}
.btn.red{background:var(--red)}
.btn.sm{padding:4px 10px;font-size:12px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row>*{flex:1;min-width:140px}.row .btn{flex:0 0 auto}
.notice{background:#e7f6f3;border:1px solid #b7e1da;padding:10px 14px;border-radius:8px;margin-bottom:16px}
.notice.err{background:#fdecea;border-color:#f5c2be;color:var(--red)}
.pill{display:inline-block;padding:1px 8px;border-radius:10px;font-size:11px;background:#eef1f4;color:var(--mu)}
.pill.ok{background:#e2f5e9;color:#0a7a3d}.pill.bad{background:#fdecea;color:var(--red)}.pill.warn{background:#fff3df;color:var(--amber)}
.muted{color:var(--mu)}small{color:var(--mu)}
.bars{display:flex;gap:10px;align-items:flex-end;height:120px;padding-top:8px}
.bars div{flex:1;text-align:center;font-size:11px;color:var(--mu)}
.bars i{display:block;background:var(--g);border-radius:4px 4px 0 0;min-height:2px;margin-bottom:4px}
.bars i.o{background:#9ad6ce}
.progress{height:12px;background:#e8edf2;border-radius:6px;overflow:hidden}.progress div{height:100%;background:var(--g);width:0;transition:width .3s}
code{background:#eef1f4;padding:2px 6px;border-radius:4px;word-break:break-all}
/* login */
body.login{display:flex;align-items:center;justify-content:center;min-height:100vh}
.loginbox{width:340px}
/* inbox */
.inbox{display:flex;height:calc(100vh - 110px);border:1px solid var(--bd);border-radius:10px;overflow:hidden;background:#fff}
.convs{width:330px;border-right:1px solid var(--bd);display:flex;flex-direction:column;flex-shrink:0}
.convs .tools{padding:10px;border-bottom:1px solid var(--bd);display:flex;gap:6px}
.convlist{overflow-y:auto;flex:1}
.conv{padding:10px 12px;border-bottom:1px solid var(--bd);cursor:pointer}
.conv:hover{background:#f7fafb}.conv.on{background:#e7f6f3}
.conv .t{display:flex;justify-content:space-between;font-weight:600}
.conv .p{color:var(--mu);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}
.conv .u{background:var(--g);color:#fff;border-radius:10px;padding:0 7px;font-size:11px;margin-left:6px}
.chat{flex:1;display:flex;flex-direction:column;min-width:0}
.chathead{padding:10px 14px;border-bottom:1px solid var(--bd);display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap}
.msgs{flex:1;overflow-y:auto;padding:14px;background:#efeae2}
.bub{max-width:70%;padding:7px 10px;border-radius:8px;margin-bottom:6px;background:#fff;box-shadow:0 1px 1px rgba(0,0,0,.08);white-space:pre-wrap;word-wrap:break-word}
.bub.out{margin-left:auto;background:#d9fdd3}
.bub .m{font-size:11px;color:var(--mu);text-align:right;margin-top:2px}
.bub .m .f{color:var(--red)}
.composer{padding:10px;border-top:1px solid var(--bd);background:#fafbfc}
.composer form{display:flex;gap:8px}.composer textarea{min-height:42px;height:42px;resize:none}
.window{background:#fff3df;color:var(--amber);padding:8px 12px;border-radius:6px;margin-bottom:8px}
.empty{margin:auto;color:var(--mu);padding:40px;text-align:center}
@media(max-width:800px){
 .shell{flex-direction:column}.side{width:auto;flex-direction:row;flex-wrap:wrap;padding:8px}
 .brand{padding:6px 10px}.side nav{display:flex;flex-wrap:wrap}.side nav a{padding:6px 10px}.me{display:none}
 .main{padding:14px}.inbox{height:calc(100vh - 170px)}
 .convs{width:100%}.inbox.chatting .convs{display:none}.inbox:not(.chatting) .chat{display:none}
}