* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; background: #f7f8fa; color:#1e293b; }
.topbar { position: sticky; top:0; z-index:10; background:#0f172a; color:#fff; padding:12px 16px; box-shadow: 0 2px 6px rgba(0,0,0,.25); }
.brand { font-weight: 700; }
.layout { display:flex; min-height: calc(100vh - 56px); }
.sidebar { width: 240px; background: #111827; color:#e5e7eb; padding: 16px; }
.sidebar a { display:block; color:#e5e7eb; text-decoration:none; padding:8px 10px; border-radius:8px; margin:4px 0; }
.sidebar a:hover { background:#1f2937; }
.nav-group { font-size: 12px; text-transform: uppercase; color:#94a3b8; margin: 12px 0 4px; }
.content { flex:1; padding: 20px; }
.card { background:#fff; border-radius:14px; padding:16px; box-shadow: 0 10px 16px rgba(2,8,20,.06); margin-bottom:16px; }
.table { width:100%; border-collapse: collapse; }
.table th, .table td { padding:10px; border-bottom:1px solid #e5e7eb; text-align:left; }
.actions { display:flex; gap:8px; }
.btn { display:inline-block; padding:8px 12px; border-radius:10px; border:1px solid #0ea5e9; background:#0ea5e9; color:white; text-decoration:none; cursor:pointer; }
.btn.secondary { background:#fff; color:#0ea5e9; }
.btn.danger { border-color:#ef4444; background:#ef4444; }
.badge { display:inline-block; padding:2px 8px; border-radius:999px; background:#e2e8f0; font-size:12px; }
.form-row { display:grid; grid-template-columns: 1fr 2fr; gap:12px; margin-bottom:12px; }
input[type=text], input[type=number], textarea, select { width:100%; padding:8px; border:1px solid #cbd5e1; border-radius:10px; background:#fff; }
.inline { display:inline-flex; align-items:center; gap:8px; }
.small { font-size:12px; color:#64748b; }
.flex { display:flex; gap:12px; flex-wrap: wrap; }
.grid-3 { display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap:12px; }
.stat { background:#fff; border-radius:14px; padding:16px; box-shadow: 0 10px 16px rgba(2,8,20,.06); }
.stat .value { font-size: 28px; font-weight: 700; }
.stat .label { color:#64748b; }
hr { border:0; border-top:1px solid #1f2937; opacity:.2; margin:10px 0; }
footer.footer { padding:16px; text-align:center; color:#94a3b8; }
.hidden { display:none; }



/* --- Searchable multi-select (devices) --- */
.msel { position: relative; max-width: 560px; }
.msel-toggle { width:100%; padding:10px 12px; border:1px solid #cbd5e1; border-radius:10px; background:#fff; display:flex; justify-content:space-between; align-items:center; cursor:pointer; }
.msel-toggle .hint { color:#64748b; font-size:14px; }
.msel-chips { display:flex; flex-wrap:wrap; gap:6px; margin-top:8px; }
.chip { background:#e2e8f0; border-radius:999px; padding:3px 8px; font-size:12px; }
.msel-panel { position:absolute; z-index:30; top:100%; left:0; right:0; background:#fff; border:1px solid #cbd5e1; border-radius:12px; box-shadow:0 12px 24px rgba(2,8,20,.12); margin-top:6px; padding:10px; }
.msel-search { width:100%; padding:8px; border:1px solid #cbd5e1; border-radius:8px; }
.msel-list { max-height:260px; overflow:auto; margin-top:8px; border-top:1px dashed #e5e7eb; padding-top:8px; }
.msel-item { display:flex; align-items:center; gap:8px; padding:6px 4px; border-radius:8px; }
.msel-item:hover { background:#f8fafc; }
.msel-empty { font-size:13px; color:#64748b; padding:6px; }
.msel-actions { display:flex; gap:8px; align-items:center; margin-top:8px; border-top:1px dashed #e5e7eb; padding-top:8px; }