:root{
  --bg:#0b1020;
  --panel:#121a2c;
  --panel-2:#17223a;
  --text:#eef2ff;
  --muted:#9fb0d3;
  --line:#283553;
  --accent:#63a4ff;
  --accent-2:#7c4dff;
  --danger:#d9534f;
  --success:#3cb371;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,system-ui,sans-serif;
  background:linear-gradient(180deg,#09101e 0%,#0f1730 100%);
  color:var(--text);
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
.hidden{display:none!important}
.blurred{filter:blur(4px);pointer-events:none;user-select:none}
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;border-bottom:1px solid var(--line);
  background:rgba(10,16,32,.85);backdrop-filter:blur(14px)
}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.1rem}
.brand-mark{
  width:40px;height:40px;border-radius:14px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 10px 30px rgba(99,164,255,.35)
}
.layout{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 73px)}
.sidebar{border-right:1px solid var(--line);padding:24px;background:rgba(255,255,255,.02)}
.nav{display:flex;flex-direction:column;gap:8px}
.nav-link{
  padding:12px 14px;border-radius:14px;color:var(--muted);
  cursor:pointer;transition:.2s;background:transparent
}
.nav-link:hover,.nav-link.active{background:var(--panel-2);color:var(--text)}
.demo-box{
  margin-top:24px;padding:16px;border:1px solid var(--line);border-radius:18px;background:var(--panel)
}
.main{padding:28px}
.hero{
  display:grid;grid-template-columns:1.2fr .8fr;gap:20px;margin-bottom:28px
}
.hero-card,.panel,.login-box,.summary-card,.product-card,.order-card{
  background:var(--panel);border:1px solid var(--line);border-radius:24px;
  box-shadow:0 10px 30px rgba(0,0,0,.18)
}
.hero-card{padding:28px}
.hero-card h1{font-size:2.1rem;margin:0 0 10px}
.hero-card p{color:var(--muted);line-height:1.6}
.page{display:none}
.page.active{display:block}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.controls{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.control{
  flex:1;min-width:180px;background:var(--panel);border:1px solid var(--line);
  color:var(--text);padding:12px 14px;border-radius:14px
}
.section-title{display:flex;justify-content:space-between;align-items:center;margin:16px 0}
.section-title h2{margin:0;font-size:1.2rem}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.product-card{overflow:hidden}
.product-image-wrap{aspect-ratio:16/10;background:#09101e}
.product-image{width:100%;height:100%;object-fit:cover;display:block}
.product-body{padding:16px}
.product-body h3{margin:6px 0 8px;font-size:1.05rem}
.product-meta,.muted{color:var(--muted)}
.price{font-size:1.15rem;font-weight:700}
.product-footer{display:flex;justify-content:space-between;gap:10px;align-items:end;margin-top:14px}
.stock{font-size:.9rem}
.stock.low{color:#ffb86b}
.btn{
  border:none;border-radius:14px;padding:11px 14px;cursor:pointer;
  transition:.2s transform,.2s opacity
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:white}
.btn-secondary{background:var(--panel-2);color:var(--text);border:1px solid var(--line)}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.btn-danger{background:rgba(217,83,79,.13);color:#ff9a97;border:1px solid rgba(217,83,79,.4)}
.panel{padding:20px}
.cart-item,.order-card{padding:16px}
.cart-item{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}
.cart-item:last-child{border-bottom:none}
.cart-actions{display:flex;gap:10px;align-items:center}
.qty-input{width:70px;padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);color:var(--text)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-group label{color:var(--muted);font-size:.92rem}
.form-group input,.form-group select,.form-group textarea{
  background:var(--panel-2);border:1px solid var(--line);color:var(--text);
  border-radius:14px;padding:12px 14px
}
.form-group textarea{min-height:110px;resize:vertical}
.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.summary-card{padding:18px}
.data-table{width:100%;border-collapse:collapse}
.data-table th,.data-table td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table-actions{display:flex;gap:10px}
.pill{
  display:inline-block;padding:6px 10px;border-radius:999px;background:var(--panel-2);
  border:1px solid var(--line);color:var(--muted);font-size:.85rem
}
.empty-state{
  padding:26px;border:1px dashed var(--line);border-radius:18px;color:var(--muted);text-align:center
}
.login-screen{
  position:fixed;inset:0;background:rgba(3,7,18,.76);display:grid;place-items:center;
  z-index:50;padding:24px
}
.login-box{width:min(460px,100%);padding:28px}
.login-box h2{margin-top:0}
.login-help{margin-top:18px;color:var(--muted);line-height:1.65}
.user-badge{padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--panel)}
.toast{
  position:fixed;bottom:20px;right:20px;z-index:60;padding:12px 14px;border-radius:14px;
  background:var(--success);color:white;box-shadow:0 10px 30px rgba(0,0,0,.25)
}
.toast.error{background:var(--danger)}
@media (max-width: 980px){
  .layout{grid-template-columns:1fr}
  .sidebar{border-right:none;border-bottom:1px solid var(--line)}
  .hero,.grid-2,.summary-grid,.form-grid{grid-template-columns:1fr}
}