:root{
  --bg:#0f1115; --panel:#171a21; --panel2:#1e222b; --line:#2a2f3a;
  --txt:#e6e8ec; --muted:#8b93a3; --accent:#6c7bff; --accent2:#4f9cff;
  --green:#2ecc71; --amber:#f5a623; --red:#ff5b5b; --blue:#4f9cff;
  --violet:#a970ff; --gray:#8b93a3; --radius:12px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--txt);
  font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent2);text-decoration:none}
.app{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--panel);border-right:1px solid var(--line);
  padding:18px 14px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{font-weight:700;font-size:17px;margin-bottom:18px;display:flex;gap:8px;align-items:center}
.logo{color:var(--accent)}
.nav-group{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);
  margin:16px 8px 6px}
.sidebar nav a{display:block;padding:8px 10px;border-radius:8px;color:var(--txt);margin-bottom:2px}
.sidebar nav a:hover{background:var(--panel2)}
.sidebar nav a.active{background:var(--accent);color:#fff}
.content{flex:1;min-width:0}
.topbar{display:flex;justify-content:space-between;align-items:center;
  padding:14px 24px;border-bottom:1px solid var(--line);background:var(--panel)}
.page-title{font-weight:600;font-size:18px}
.user{color:var(--muted);font-size:14px}
.user .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-left:6px}
.container{padding:24px;max-width:1150px}
.flash{padding:11px 14px;border-radius:8px;margin-bottom:16px;font-size:14px}
.flash-success{background:rgba(46,204,113,.12);border:1px solid var(--green);color:#9fe9bf}
.flash-error{background:rgba(255,91,91,.12);border:1px solid var(--red);color:#ffb3b3}
.flash-info{background:rgba(79,156,255,.12);border:1px solid var(--blue);color:#bfe0ff}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-bottom:24px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card .k{color:var(--muted);font-size:13px}
.card .v{font-size:26px;font-weight:700;margin-top:6px}
.card .sub{color:var(--muted);font-size:12px;margin-top:4px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.panel h2{margin:0 0 14px;font-size:16px}
.row{display:flex;gap:16px;flex-wrap:wrap}
.row > *{flex:1;min-width:240px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
tr:hover td{background:var(--panel2)}
.badge{display:inline-block;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:600}
.badge-green{background:rgba(46,204,113,.15);color:#4fe08a}
.badge-amber{background:rgba(245,166,35,.15);color:#ffcb6b}
.badge-red{background:rgba(255,91,91,.15);color:#ff9a9a}
.badge-blue{background:rgba(79,156,255,.15);color:#8fc2ff}
.badge-violet{background:rgba(169,112,255,.15);color:#c9a6ff}
.badge-gray{background:rgba(139,147,163,.15);color:#b3bac7}
.btn{display:inline-block;background:var(--accent);color:#fff;border:none;padding:9px 16px;
  border-radius:8px;font-size:14px;cursor:pointer;font-weight:600}
.btn:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn-danger{background:var(--red)}
.btn-sm{padding:5px 10px;font-size:13px}
label{display:block;margin:12px 0 5px;font-size:13px;color:var(--muted)}
input,select,textarea{width:100%;background:var(--panel2);border:1px solid var(--line);
  color:var(--txt);padding:10px 12px;border-radius:8px;font-size:14px;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{min-height:90px;resize:vertical}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.actions{display:flex;gap:8px;align-items:center;margin-top:18px;flex-wrap:wrap}
.muted{color:var(--muted)}
.right{text-align:right}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:12px;flex-wrap:wrap}
.tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.tabs a{padding:6px 12px;border-radius:20px;background:var(--panel);border:1px solid var(--line);font-size:13px;color:var(--txt)}
.tabs a.on{background:var(--accent);color:#fff;border-color:var(--accent)}
.chart-wrap{position:relative;height:280px}
/* Auth pages */
.auth{max-width:400px;margin:8vh auto;background:var(--panel);border:1px solid var(--line);
  border-radius:16px;padding:32px}
.auth h1{font-size:22px;margin:0 0 4px}
.auth .sub{color:var(--muted);margin-bottom:20px;font-size:14px}
.auth .btn{width:100%;margin-top:18px;padding:11px}
.center{text-align:center}
.qr{background:#fff;padding:12px;border-radius:10px;display:inline-block;margin:10px 0}
.code-lg input{font-size:24px;letter-spacing:8px;text-align:center}
.item-row{display:grid;grid-template-columns:3fr 1fr 1.3fr 1.3fr 40px;gap:8px;margin-bottom:8px;align-items:center}
.item-row .rm{background:var(--red);border:none;color:#fff;border-radius:6px;height:38px;cursor:pointer}
@media(max-width:820px){.sidebar{display:none}.grid2{grid-template-columns:1fr}}