:root{
  --bg:#f4f5f8; --surface:#ffffff; --ink:#1e2330; --muted:#6b7280;
  --primary:#4f46e5; --primary-d:#4338ca; --primary-l:#eef2ff;
  --accent:#0ea5e9; --line:#e5e7eb; --ok:#16a34a; --warn:#b91c1c;
  --radius:14px; --radius-sm:9px; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.5; min-height:100vh;
  display:flex; flex-direction:column;
}
a{color:var(--primary); text-decoration:none}
a:hover{text-decoration:underline}
h1{font-size:28px;margin:.2em 0 .6em} h2{font-size:20px;margin:1.2em 0 .5em}
.container{max-width:1080px;margin:0 auto;padding:0 20px;width:100%}
.muted{color:var(--muted);font-size:14px}

/* Header */
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;font-size:17px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{color:#374151;font-weight:500;font-size:15px}
.nav-links a:hover{color:var(--primary);text-decoration:none}
.cart-link{padding:7px 14px;border:1px solid var(--line);border-radius:999px;background:#fff}
.cart-link:hover{border-color:var(--primary);background:var(--primary-l)}

/* Page shells */
.shop,.admin{flex:1;width:100%;max-width:1080px;margin:0 auto;padding:24px 20px 48px}
.admin{max-width:1000px}

/* Hero */
.hero{margin:22px 0 26px;padding:38px 34px;border-radius:var(--radius);color:#fff;
  background:radial-gradient(1200px 200px at 10% -20%,rgba(255,255,255,.25),transparent),
    linear-gradient(120deg,var(--primary),#7c3aed 55%,var(--accent));box-shadow:var(--shadow)}
.hero h1{color:#fff;margin:0 0 8px;font-size:32px}
.hero p{margin:0;max-width:560px;color:#eef2ff}

/* Toolbar */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:6px 0 18px;flex-wrap:wrap}
.toolbar .count{color:var(--muted);font-size:14px}
.sort{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.chip{padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#374151;font-size:14px}
.chip:hover{border-color:var(--primary);color:var(--primary);text-decoration:none}

/* Product grid */
.grid{display:flex;flex-wrap:wrap;gap:20px}
.card{width:240px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease;
  display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(16,24,40,.12)}
.card-img{display:block;background:#eef1f6;aspect-ratio:4/3;overflow:hidden}
.card img,.card-img img{width:100%;height:100%;object-fit:cover;display:block}
.card-body{padding:14px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-title{font-weight:600;color:var(--ink);font-size:15px;line-height:1.3}
.card-title:hover{color:var(--primary);text-decoration:none}
.price{font-weight:800;font-size:18px;color:var(--ink)}
.card .btn{margin-top:auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  font-size:15px;font-weight:600;padding:11px 18px;border-radius:var(--radius-sm);border:1px solid transparent;
  background:#fff;color:var(--ink);transition:background .12s,border-color .12s,opacity .12s}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-secondary{background:#fff;color:var(--primary);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-l)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn:disabled{opacity:.55;cursor:not-allowed}
button{font-family:inherit}

/* Pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin:28px 0 0;flex-wrap:wrap}
.pagination a,.pagination span{min-width:38px;text-align:center;padding:8px 12px;border:1px solid var(--line);
  border-radius:9px;background:#fff;color:#374151;font-size:14px}
.pagination a:hover{border-color:var(--primary);color:var(--primary);text-decoration:none}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary)}

/* Product detail */
.product-detail{display:grid;grid-template-columns:minmax(0,420px) 1fr;gap:32px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.product-detail .photo{background:#eef1f6;border-radius:var(--radius-sm);aspect-ratio:4/3;overflow:hidden}
.product-detail .photo img{width:100%;height:100%;object-fit:cover;display:block}
.product-detail .info h1{margin-top:0}
.product-detail .info .price{font-size:26px;margin:8px 0 18px}
.breadcrumbs{margin:2px 0 16px;font-size:14px;color:var(--muted)}
.reviews{margin-top:30px}
.review{background:#f8fafc;border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:8px;padding:10px 14px;margin:8px 0}

/* Forms */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px;max-width:480px}
.form-card.wide{max-width:560px}
form label{display:block;margin:0 0 14px;font-size:14px;color:#374151;font-weight:500}
form input,form select,form textarea{display:block;width:100%;margin-top:6px;padding:11px 12px;
  border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
form input:focus,form select:focus,form textarea:focus{outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-l)}
.form-card .btn{width:100%;margin-top:6px}
#checkoutResult,#registerResult{margin-top:14px;font-weight:600;color:var(--ok)}
#checkoutResult a{margin-left:6px}

/* Cart table */
.cart-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px 20px}
table{border-collapse:collapse;width:100%}
th,td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
th{font-size:13px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);font-weight:600}
.cart-total{display:flex;justify-content:flex-end;align-items:baseline;gap:10px;margin:16px 4px 0;font-size:18px}
.cart-total #total{font-weight:800;font-size:22px}
input.qty{width:74px}
.rm{background:#fff;border:1px solid var(--line);color:var(--warn);border-radius:8px;padding:7px 11px;cursor:pointer;font-size:14px}
.rm:hover{border-color:var(--warn);background:#fef2f2}
.cart-actions{display:flex;justify-content:flex-end;margin-top:18px}

/* Order confirmation */
.order-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;max-width:600px}
.order-num{display:inline-block;background:var(--primary-l);color:var(--primary-d);font-weight:700;
  padding:6px 14px;border-radius:999px;margin-bottom:10px}
.order-card .row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed var(--line)}

/* Search */
.search-form{display:flex;gap:10px;max-width:520px;margin-bottom:18px}
.search-form input{flex:1;margin-top:0}
.results{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.results li{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 14px}

/* Profile */
.profile-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px;max-width:480px}
#adminArea button{margin-top:14px}

/* Gate pages */
.gate{flex:1;display:grid;place-items:center;text-align:center;padding:60px 20px}
.gate>main,.gate-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:44px 40px;max-width:460px}
.gate h1{font-size:24px}

/* Admin */
.admin h1{font-size:24px}
.admin table{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.admin .report{background:#f8fafc;border:1px solid var(--line);border-left:3px solid var(--muted);
  border-radius:8px;padding:10px 14px;margin:8px 0}

/* Footer */
.site-footer{background:#0f1422;color:#cbd5e1;margin-top:auto}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px;padding:38px 20px 22px}
.footer-col h4{margin:0 0 12px;font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:#94a3b8}
.footer-col a,.footer-col span{display:block;color:#cbd5e1;font-size:14px;margin-bottom:7px}
.footer-col a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:17px;color:#fff;margin-bottom:8px}
.footer-col .muted{color:#94a3b8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 20px;font-size:13px;color:#94a3b8}

/* Report panel (bug-free widget) */
#rp-toggle{position:fixed;right:20px;bottom:20px;z-index:60;background:var(--primary);color:#fff;
  border:none;border-radius:999px;padding:13px 20px;font-size:15px;font-weight:600;cursor:pointer;
  box-shadow:0 10px 26px rgba(79,70,229,.4)}
#rp-toggle:hover{background:var(--primary-d)}
#rp-panel{position:fixed;right:20px;bottom:74px;width:320px;max-height:80vh;overflow:auto;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:18px;z-index:60;
  box-shadow:0 20px 50px rgba(16,24,40,.25);display:grid;gap:9px}
#rp-panel[hidden]{display:none}
#rp-panel h3{margin:0 0 4px;font-size:17px}
#rp-panel label{margin:0;font-size:13px;color:#374151;font-weight:600;display:grid;gap:4px}
#rp-panel select,#rp-panel input,#rp-panel textarea{width:100%;padding:9px 10px;border:1px solid var(--line);
  border-radius:8px;font-size:14px;font-family:inherit}
#rp-panel textarea{min-height:50px;resize:vertical}
#rp-send{background:var(--primary);color:#fff;border:none;border-radius:9px;padding:11px;font-weight:600;cursor:pointer}
#rp-send:hover{background:var(--primary-d)}
#rp-finish{background:#fff;color:#374151;border:1px solid var(--line);border-radius:9px;padding:10px;cursor:pointer}
#rp-finish:hover{border-color:var(--primary);color:var(--primary)}
#rp-status{font-size:13px;color:var(--ok);min-height:16px}

/* overlap bug: fixed wide cards collide on narrow screens (planted bug ui_overlap_narrow) */
@media (max-width:480px){.grid.overlap-bug .card{width:300px;margin-right:-120px}}

/* general responsive */
@media (max-width:760px){
  .product-detail{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .nav-links{gap:14px;font-size:14px}
  .nav-links a:not(.cart-link){display:none}
}