:root{
  --bg1:#07101a; --bg2:#0b1730; --panel:rgba(10,20,36,.82); --line:rgba(110,170,255,.14);
  --text:#eef4fd; --muted:#9cb1cf; --blue:#50c8ff; --blue2:#2a6fcb; --red:#ff5a7a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%;font-family:Arial,sans-serif;color:var(--text);background:#050b14}
body{overflow-x:hidden}
a{text-decoration:none;color:inherit}
button,input{font:inherit}
.bg{
  position:fixed; inset:0; z-index:0;
  background:
    radial-gradient(circle at 20% 15%, rgba(80,200,255,.14), transparent 18%),
    radial-gradient(circle at 75% 35%, rgba(80,200,255,.08), transparent 22%),
    linear-gradient(180deg, var(--bg2) 0%, var(--bg1) 52%, #060c14 100%);
}
.shell{position:relative;z-index:1;display:grid;grid-template-columns:260px 1fr;gap:18px;max-width:1540px;margin:0 auto;padding:18px}
.sidebar,.card{
  background:var(--panel); backdrop-filter:blur(12px); border:1px solid var(--line);
  border-radius:22px; box-shadow:0 16px 40px rgba(0,0,0,.22);
}
.sidebar{padding:18px;align-self:start;position:sticky;top:18px}
.brand{display:flex;gap:12px;align-items:center;margin-bottom:16px}
.logo{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue2),var(--blue));font-weight:800}
.brand-title{font-size:24px;font-weight:800}
.brand-sub{font-size:13px;color:var(--muted);margin-top:4px}
.nav a{display:block;padding:13px 15px;border-radius:15px;margin-bottom:8px;background:rgba(13,28,52,.82);border:1px solid rgba(110,170,255,.12)}
.nav a.active{background:linear-gradient(135deg, rgba(42,111,203,.96), rgba(80,200,255,.96))}
.userbox{margin-top:16px;padding:14px;border-radius:16px;background:rgba(10,20,36,.64);border:1px solid rgba(110,170,255,.10)}
.main{min-width:0}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px}
.topbar h2{margin:0;font-size:40px;line-height:1.05}
.topbar p{margin:8px 0 0;color:var(--muted);font-size:17px;max-width:900px}
.grid{display:grid;gap:16px}
.cols-2{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}
.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{padding:18px}
.card h3{margin:0 0 12px 0;font-size:24px}
.feed{display:flex;flex-direction:column;gap:10px}
.item{padding:12px;border-radius:14px;background:rgba(10,20,36,.82);border:1px solid rgba(110,170,255,.10);line-height:1.45}
.kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:16px}
.kpi span{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.kpi strong{display:block;font-size:32px;margin-top:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:14px;border:1px solid rgba(110,170,255,.16);background:rgba(12,26,48,.92);color:var(--text);cursor:pointer}
.btn.primary{background:linear-gradient(135deg,var(--blue2),var(--blue));border:none}
.row{display:flex;gap:8px;flex-wrap:wrap}
.demo-wrap{display:grid;grid-template-columns:minmax(0,1.4fr) 320px;gap:16px}
.demo-canvas-wrap{
  position:relative; min-height:620px; border-radius:20px; overflow:hidden;
  background:radial-gradient(circle at 30% 20%,rgba(90,180,255,.08),transparent 140px),linear-gradient(180deg,#081321,#0b1628);
  border:1px solid rgba(110,170,255,.12)
}
#demoCanvas{position:absolute;inset:0;width:100%;height:100%}
.demo-head{
  position:absolute;left:16px;right:16px;top:16px;display:flex;justify-content:space-between;gap:12px;align-items:flex-start;z-index:3
}
.mini-card{
  padding:10px 12px;border-radius:14px;background:rgba(8,18,32,.72);border:1px solid rgba(110,170,255,.12)
}
.mini-card strong{display:block;font-size:18px}
.mini-card span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
.alert{font-size:16px;color:var(--red);font-weight:700;min-height:20px}
.ai{font-size:13px;color:var(--blue);margin-top:6px;min-height:18px}
.muted{color:var(--muted)}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input{width:100%;padding:12px 14px;border-radius:14px;border:1px solid rgba(110,170,255,.16);background:rgba(8,18,32,.90);color:var(--text)}
.auth-wrap{position:relative;z-index:1;min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{width:min(500px,100%);padding:26px;border-radius:26px;background:var(--panel);backdrop-filter:blur(12px);border:1px solid var(--line);box-shadow:0 16px 40px rgba(0,0,0,.22)}
.auth-hero{font-size:15px;color:#d7e5fa;line-height:1.6;margin-bottom:16px}
@media(max-width:1250px){
  .shell{grid-template-columns:1fr;max-width:980px}
  .sidebar{position:relative;top:0}
  .topbar h2{font-size:34px}
  .demo-wrap{grid-template-columns:1fr}
}
@media(max-width:900px){
  .kpis{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cols-2,.cols-3{grid-template-columns:1fr}
  .topbar{flex-direction:column}
  .demo-canvas-wrap{min-height:420px}
}