:root{
  --bg:#f7fafc;
  --accent:#0a63d8;
  --dark:#0f1724;
  --muted:#6b7280;
  --card:#ffffff;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:'Vazirmatn',Tahoma,Arial,sans-serif;background:var(--bg);color:var(--dark);-webkit-font-smoothing:antialiased}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.site-header{background:linear-gradient(90deg,var(--dark),#1b2a49);color:#fff;position:sticky;top:0;z-index:60}
.header-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:12px}
.logo img{height:44px}
.main-nav .menu{list-style:none;margin:0;padding:0;display:flex;gap:10px;align-items:center}
.main-nav a{color:#e6eef9;text-decoration:none;padding:10px 12px;border-radius:8px;display:inline-block}
.main-nav .has-mega{position:relative}
.mega{position:absolute;left:0;right:auto;top:50px;background:#fff;color:#0f1724;min-width:520px;padding:18px;border-radius:10px;display:none;box-shadow:0 12px 40px rgba(11,24,48,0.12)}
.has-mega:hover .mega{display:flex;gap:12px}
.mega-col{flex:1}
.mega-col h4{margin:0 0 8px;font-size:14px}
.mega a{display:block;color:var(--dark);text-decoration:none;padding:6px 0}
.mega .promo{display:flex;gap:10px;align-items:center}
.mega .promo img{width:80px;height:60px;object-fit:cover;border-radius:8px}
.header-actions{display:flex;align-items:center;gap:10px}
.search input{padding:8px 12px;border-radius:8px;border:1px solid rgba(255,255,255,0.12);min-width:220px}
.cart-btn{background:transparent;border:1px solid rgba(255,255,255,0.12);color:#fff;padding:8px 10px;border-radius:8px;cursor:pointer}

/* Hero */
.hero{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center;padding:36px 0}
.hero-content h1{font-size:32px;margin:0 0 10px;color:var(--dark)}
.hero-content p{margin:0 0 18px;color:var(--muted)}
.hero-carousel{position:relative;height:300px;border-radius:12px;overflow:hidden;box-shadow:0 12px 30px rgba(11,24,48,0.06)}
.hero-carousel .slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 0.7s}
.hero-carousel .slide.active{opacity:1}

/* categories */
.categories h2,.featured h2,.bestseller h2{margin:18px 0;font-size:20px}
.cats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.cat-card{background:var(--card);border-radius:12px;padding:12px;text-align:center;text-decoration:none;color:var(--dark);box-shadow:0 8px 24px rgba(11,24,48,0.04);display:flex;flex-direction:column;gap:8px;align-items:center}
.cat-card img{width:100%;height:120px;object-fit:cover;border-radius:8px}
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.product-card{background:var(--card);padding:12px;border-radius:12px;box-shadow:0 12px 30px rgba(11,24,48,0.04);display:flex;flex-direction:column;gap:8px}
.product-card img{width:100%;height:160px;object-fit:cover;border-radius:8px}
.product-card h3{margin:0;font-size:16px}
.price{font-weight:700;color:var(--accent);margin-top:auto}

/* horizontal scroll */
.hscroll{display:flex;gap:12px;overflow:auto;padding:8px 0}
.hscroll .product-card{min-width:200px;flex:0 0 200px}

/* sidebar / products page */
.products-page{display:grid;grid-template-columns:280px 1fr;gap:20px;padding:20px 0}
.sidebar{background:var(--card);padding:12px;border-radius:12px;box-shadow:0 8px 20px rgba(11,24,48,0.04)}
.side-list{list-style:none;padding:0;margin:0}
.side-list li{padding:8px 0}
.products-tools{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}

/* footer */
.site-footer{background:#0b1220;color:#cfe0ff;padding:28px 0;margin-top:30px}
.footer-grid{display:flex;gap:24px;align-items:flex-start}

/* cart modal */
.cart-modal{position:fixed;inset:0;background:rgba(0,0,0,0.5);display:none;align-items:center;justify-content:center;z-index:200}
.cart-box{background:#fff;padding:16px;border-radius:12px;width:100%;max-width:520px}
.cart-item{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid #f0f3f7}
.cart-footer{padding:10px 0;font-weight:700}

/* checkout */
.checkout-grid{display:grid;grid-template-columns:1fr 380px;gap:20px;margin-top:18px}
.checkout-form label{display:block;margin-bottom:10px}
.checkout-form input, .checkout-form textarea{width:100%;padding:8px;border-radius:8px;border:1px solid #e6eef9}

/* responsive */
@media(max-width:900px){
  .hero{grid-template-columns:1fr;gap:12px}
  .products-page{grid-template-columns:1fr;gap:16px}
  .header-row{flex-direction:column;align-items:flex-start}
  .search input{min-width:120px}
  .mega{position:static;display:none}
}