:root{
  --bg:#f6f8fb; --panel:#fff; --line:#e5e7eb; --text:#0f172a; --muted:#64748b;
  --primary:#2563eb; --success:#16a34a; --danger:#dc2626; --warning:#f59e0b;
  --shadow:0 10px 25px rgba(15,23,42,.08); --radius:16px; --sidebar-width:260px; --sidebar-collapse:82px;
}
*{box-sizing:border-box} html,body{margin:0;padding:0;font-family:Inter,system-ui,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit} img{max-width:100%;display:block} button{font:inherit;cursor:pointer}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.topnav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topnav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800}.brand-mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#2563eb,#60a5fa);display:flex;align-items:center;justify-content:center;color:#fff}
.nav-links{display:flex;gap:20px;align-items:center;color:var(--muted)}
.icon-btn{border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;display:inline-flex;align-items:center;gap:8px;box-shadow:var(--shadow)}
.hero{padding:42px 0 24px}.hero-card{background:linear-gradient(135deg,#0f172a,#1e3a8a);color:#fff;border-radius:28px;padding:40px;display:grid;grid-template-columns:1.2fr .8fr;gap:24px;box-shadow:var(--shadow)}
.hero h1{font-size:40px;line-height:1.1;margin:0 0 12px}.hero p{margin:0 0 22px;color:#cbd5e1}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{border:none;border-radius:14px;padding:13px 18px;font-weight:700}.btn-primary{background:#fff;color:#0f172a}.btn-soft{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.15)}
.section{padding:22px 0 34px}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:16px}.section-head h2{margin:0;font-size:24px}.section-head p{margin:6px 0 0;color:var(--muted)}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.product-card{overflow:hidden}.product-image{aspect-ratio:4/3;background:#e2e8f0;position:relative}.badge{position:absolute;top:14px;left:14px;background:#ef4444;color:#fff;padding:8px 10px;border-radius:999px;font-size:12px;font-weight:700}
.product-body{padding:16px}.product-title{font-size:18px;font-weight:800;margin:0 0 8px}.product-desc{font-size:14px;color:var(--muted);min-height:40px}.price-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:14px 0}.price-old{text-decoration:line-through;color:#94a3b8;font-size:14px}.price-new{font-size:24px;font-weight:800}.product-actions{display:flex;gap:10px}.btn-outline{background:#fff;border:1px solid var(--line);color:var(--text)}
.muted{color:var(--muted)} .flash{max-width:1200px;margin:0 auto 16px;padding:14px 16px;border-radius:12px}.flash.success{background:#dcfce7;color:#166534}.flash.error{background:#fee2e2;color:#991b1b}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field{display:flex;flex-direction:column;gap:8px}.input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}
.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:#0f172a;color:#fff;border-right:1px solid rgba(255,255,255,.08);transition:width .25s ease, transform .25s ease;position:fixed;inset:0 auto 0 0;z-index:40;overflow:hidden}
.sidebar.collapsed{width:var(--sidebar-collapse)}.sidebar-header{height:74px;display:flex;align-items:center;padding:0 18px;border-bottom:1px solid rgba(255,255,255,.08);gap:12px}.sidebar-title{font-weight:800;white-space:nowrap}
.sidebar-nav{padding:16px 10px;display:flex;flex-direction:column;gap:6px}.side-link{display:flex;align-items:center;gap:12px;color:#e2e8f0;padding:12px 14px;border-radius:14px;white-space:nowrap}.side-link:hover,.side-link.active{background:rgba(255,255,255,.08)}
.side-icon{width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 24px;font-size:18px}.side-text{transition:opacity .2s ease}.sidebar.collapsed .side-text{opacity:0;pointer-events:none}
.dashboard-main{flex:1;margin-left:var(--sidebar-width);transition:margin-left .25s ease;min-width:0}.dashboard-main.expanded{margin-left:var(--sidebar-collapse)}
.topbar{position:sticky;top:0;z-index:25;background:rgba(246,248,251,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 22px}.topbar-left,.topbar-right{display:flex;align-items:center;gap:12px}
.hamburger{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}.search{background:#fff;border:1px solid var(--line);border-radius:12px;padding:11px 14px;min-width:320px}
.dashboard-content{padding:22px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat{padding:18px}.stat .label{font-size:13px;color:var(--muted)}.stat .value{font-size:28px;font-weight:800;margin-top:8px}
.grid-2{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;margin-top:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}th{color:var(--muted);font-weight:700}
.panel-head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.panel-body{padding:18px 20px}.invoice-box{padding:18px;border:1px dashed #cbd5e1;border-radius:14px;background:#f8fafc}
.list-clean{display:flex;flex-direction:column;gap:12px}.list-item{padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff}.overlay{display:none}
.notice{padding:12px 14px;background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;color:#9a3412}
@media (max-width:1024px){.product-grid,.stats,.grid-2,.grid-3,.hero-card{grid-template-columns:1fr}.search{min-width:0;width:100%}}
@media (max-width:860px){.nav-links{display:none}.sidebar{transform:translateX(-100%);width:var(--sidebar-width)}.sidebar.mobile-open{transform:translateX(0)}.dashboard-main,.dashboard-main.expanded{margin-left:0}.overlay.show{display:block;position:fixed;inset:0;background:rgba(15,23,42,.35);z-index:35}.form-grid{grid-template-columns:1fr}}