:root{
  --bg:#0b141a; --panel:#111b21; --panel2:#1f2c34; --txt:#e9edef;
  --muted:#8696a0; --accent:#00a884; --accent-d:#008069; --out:#005c4b;
  --danger:#ea5555; --card:#111b21;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--txt);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:#53bdeb;text-decoration:none}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:var(--panel);border-bottom:1px solid #222d34}
.brand{font-weight:700;color:var(--txt);font-size:18px}
.topbar nav{display:flex;gap:12px;align-items:center}
.who{color:var(--muted);font-size:13px}
.inline{display:inline}
.linkbtn{background:none;border:none;color:#53bdeb;cursor:pointer;font-size:14px}
.wrap{max-width:1100px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid #222d34;border-radius:10px;padding:16px;margin:12px 0}
.card.narrow{max-width:420px;margin:40px auto}
h1{font-size:22px;margin:8px 0} h2{font-size:17px;margin:6px 0}
.muted{color:var(--muted)} .small{font-size:12px} .pad{padding:12px}
.err{color:var(--danger)} .bigcode{font-size:28px;letter-spacing:4px;font-weight:700}
label{display:block;margin:10px 0;font-size:14px}
input{width:100%;padding:10px;margin-top:4px;background:var(--panel2);border:1px solid #2a3942;color:var(--txt);border-radius:8px}
.btn{background:var(--panel2);color:var(--txt);border:1px solid #2a3942;border-radius:8px;padding:9px 14px;cursor:pointer;font-size:14px}
.btn.primary{background:var(--accent-d);border-color:var(--accent-d);color:#fff}
.btn.danger{color:#ff8a8a}
.btnrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.rowform{display:flex;gap:8px;flex-wrap:wrap} .rowform input{flex:1;min-width:200px}
.devgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:4px}
.devhead{display:flex;justify-content:space-between;align-items:center;gap:8px}
.badge{font-size:11px;padding:3px 10px;border-radius:20px;background:#333;color:#ccc}
.badge.ok{background:#0a3d2e;color:#4be1a0}.badge.warn{background:#4a3a10;color:#ffd279}.badge.bad{background:#4a1515;color:#ff9a9a}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal.hidden,.hidden{display:none!important}
.modalbox{background:var(--panel);border-radius:12px;padding:24px;max-width:420px;text-align:center}
/* chat layout */
.chathead{display:flex;gap:12px;align-items:center;padding:8px 4px}
.chatlayout{display:flex;height:calc(100vh - 170px);min-height:420px;background:var(--panel);border:1px solid #222d34;border-radius:10px;overflow:hidden}
.chatlist{width:320px;min-width:260px;border-right:1px solid #222d34;display:flex;flex-direction:column}
.chatlist input{margin:8px;border-radius:20px}
#chats{overflow-y:auto;flex:1}
.chatitem{display:flex;gap:10px;padding:10px 12px;cursor:pointer;border-bottom:1px solid #1a252c;align-items:center}
.chatitem:hover{background:#1a252c}.chatitem.active{background:#2a3942}
.avatar{width:44px;height:44px;border-radius:50%;background:#2a3942;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.cinfo{flex:1;min-width:0}.cname{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cprev{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ctime{color:var(--muted);font-size:11px}
.conv{flex:1;display:flex;flex-direction:column;min-width:0}
.convhead{padding:12px;border-bottom:1px solid #222d34;background:#1f2c34}
.msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:6px;background:#0b141a}
.msg{display:flex}.msg.in{justify-content:flex-start}.msg.out{justify-content:flex-end}
.bubble{max-width:70%;padding:8px 12px;border-radius:10px;font-size:14px;line-height:1.4;word-wrap:break-word;position:relative}
.msg.in .bubble{background:#1f2c34}.msg.out .bubble{background:var(--out)}
.mtime{display:block;font-size:10px;color:var(--muted);text-align:right;margin-top:4px}
.sendbar{display:flex;gap:8px;padding:10px;background:#1f2c34}
.sendbar input{flex:1;border-radius:20px}
@media(max-width:700px){.chatlist{width:38vw;min-width:0}.bubble{max-width:85%}}