:root{
  --accent:#6c47ff; --accent2:#8b5cf6; --accent3:#22c55e;
  --warn:#f59e0b; --danger:#ef4444; --info:#3b82f6;
  --bg:#f5f7fb; --panel:#ffffff; --text:#101828; --muted:#667085;
  --border:#e4e7ec; --side:#202a3a; --sideText:#e5e7eb; --shadow:0 10px 30px rgba(16,24,40,.06);
}
body.dark{
  --bg:#0d1420; --panel:#141d2a; --text:#f4f6f8; --muted:#98a2b3;
  --border:#263346; --side:#0a1019; --sideText:#e5e7eb; --shadow:0 10px 30px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);transition:.2s}
a{color:inherit;text-decoration:none}
.shell{display:grid;grid-template-columns:230px 1fr;min-height:100vh}
.sidebar{background:var(--side);color:var(--sideText);padding:22px 14px;position:sticky;top:0;height:100vh}
.brand{font-weight:900;font-size:22px;padding:0 8px 20px}.brand span{color:#a78bfa}
.nav a{display:block;padding:11px 13px;margin:5px 0;border-radius:8px;color:#cbd5e1;font-size:14px}
.nav a:hover,.nav a.active{background:linear-gradient(90deg,#6d4aff,#7c3aed);color:white}
.content{min-width:0}
.topbar{height:68px;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px;padding:0 24px;position:sticky;top:0;z-index:10}
.topbar .search{flex:1;max-width:520px}
input,select,button{font:inherit;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:8px;padding:10px 12px}
button{cursor:pointer}
.btn{background:linear-gradient(90deg,#6d4aff,#7c3aed);color:#fff;border:0;font-weight:700}
.main{padding:24px}
h1,h2,h3,p{margin-top:0}.muted{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:18px}
.kpi .n{font-size:28px;font-weight:900;margin-top:8px}
.good{color:var(--accent3)}.warn{color:var(--warn)}.bad{color:var(--danger)}.info{color:var(--info)}
.grid2{display:grid;grid-template-columns:1.3fr 1fr;gap:14px;margin-top:14px}
.grid3{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:14px;margin-top:14px}
.tablewrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:11px;border-bottom:1px solid var(--border);white-space:nowrap}
th{color:var(--muted);font-weight:700}
.status{display:inline-flex;align-items:center;gap:6px;font-weight:700}.dot{width:8px;height:8px;border-radius:50%;background:currentColor}
.chart{height:220px;position:relative;background:linear-gradient(180deg,rgba(108,71,255,.08),transparent);border-radius:10px;overflow:hidden}
.chart svg{width:100%;height:100%}
.donut{width:150px;height:150px;border-radius:50%;margin:auto;background:conic-gradient(#22c55e 0 72%,#f59e0b 72% 82%,#ef4444 82% 90%,#64748b 90%);position:relative}
.donut:after{content:"";position:absolute;inset:28px;background:var(--panel);border-radius:50%}
.donut b{position:absolute;inset:0;display:grid;place-items:center;z-index:2;font-size:26px}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:center;padding:70px 6vw;background:linear-gradient(135deg,#f5f3ff,#eef2ff 55%,#fff)}
body.dark .hero{background:linear-gradient(135deg,#111827,#182235 55%,#10131a)}
.hero h1{font-size:58px;line-height:1.02}.hero .accent{color:#6d4aff}.hero-art{font-size:112px;text-align:center}
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:24px 6vw 55px}
.public-nav{height:70px;display:flex;align-items:center;padding:0 6vw;background:var(--panel);border-bottom:1px solid var(--border)}
.public-nav .links{display:flex;gap:24px;margin-left:auto;align-items:center}
.device-icon{font-size:48px}
.badge{display:inline-block;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:800;background:#ede9fe;color:#5b21b6}
body.dark .badge{background:#2b1f51;color:#c4b5fd}
.alert{border-left:4px solid var(--warn);padding:10px 12px;background:var(--panel);border-radius:7px;margin:9px 0}
.network{min-height:540px;position:relative;display:flex;align-items:center;justify-content:center}
.node{position:absolute;padding:12px 16px;background:var(--panel);border:1px solid #8b5cf6;border-radius:10px;box-shadow:var(--shadow);text-align:center;min-width:150px}
.node small{display:block;color:var(--muted);margin-top:5px}
.line{position:absolute;height:2px;background:#8b5cf6;transform-origin:left center}
.setting-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid var(--border)}
.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.theme-choice{padding:18px;text-align:center;border:1px solid var(--border);border-radius:10px;cursor:pointer}
.theme-choice.active{border-color:#7c3aed;box-shadow:0 0 0 2px rgba(124,58,237,.15)}
.login{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:var(--bg)}
.login-card{display:grid;place-items:center}.login-box{width:min(420px,90%);background:var(--panel);padding:30px;border:1px solid var(--border);border-radius:14px}
.login-art{background:linear-gradient(135deg,#24104d,#101827);color:white;display:grid;place-items:center;text-align:center;padding:40px}
.form-row{display:grid;gap:7px;margin:13px 0}
.small{font-size:12px}
footer{padding:28px 6vw;border-top:1px solid var(--border);color:var(--muted)}
@media(max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}.grid2,.grid3{grid-template-columns:1fr}.shell{grid-template-columns:80px 1fr}.sidebar .brand,.sidebar .nav span{display:none}.hero{grid-template-columns:1fr}.features{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.cards,.features{grid-template-columns:1fr}.shell{grid-template-columns:1fr}.sidebar{display:none}.public-nav .links a:not(.btn){display:none}.hero h1{font-size:42px}.login{grid-template-columns:1fr}.login-art{display:none}}