*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#ffffff;--fg:#0f172a;--muted:#64748b;--border:#e2e8f0;--card:#ffffff;--brand:#2563eb;--brand-dark:#1d4ed8;--accent:#f59e0b;--danger:#dc2626;--surface:#f8fafc}
html,body{background:var(--bg);color:var(--fg);font-family:'Inter',system-ui,-apple-system,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted);font-size:14px}
h1,h2,h3,h4{font-weight:700;line-height:1.2;color:var(--fg)}
h1{font-size:36px;margin:0 0 16px}
h2{font-size:28px;margin:0 0 12px}
h3{font-size:20px;margin:0 0 8px}
h4{font-size:15px;margin:0 0 12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
p{margin:0 0 12px}
main{min-height:60vh;padding:32px 0 64px}
/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:32px;padding:14px 20px}
.logo{font-size:22px;font-weight:800;color:var(--brand)}
.main-nav{display:flex;gap:20px;flex:1;align-items:center;flex-wrap:wrap}
.main-nav a,.dropdown-btn{color:var(--fg);font-weight:500;font-size:15px;background:none;border:none;cursor:pointer;font-family:inherit}
.main-nav a:hover,.dropdown-btn:hover{color:var(--brand)}
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:8px;padding:8px 0;min-width:200px;box-shadow:0 8px 24px rgba(0,0,0,.08);z-index:20}
.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:8px 16px;font-size:14px}
.dropdown-menu a:hover{background:var(--surface)}
.cart-link{font-weight:600;position:relative;display:inline-flex;align-items:center;gap:6px}
.cart-count{background:var(--brand);color:#fff;border-radius:999px;padding:2px 8px;font-size:12px;font-weight:700;min-width:22px;text-align:center}
.mobile-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer}
@media(max-width:820px){.main-nav{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:12px;padding:12px 0}.mobile-toggle{display:block}.header-inner{flex-wrap:wrap}body.nav-open .main-nav{display:flex}.dropdown-menu{position:static;box-shadow:none;border:none;padding-left:12px}}
/* Buttons */
.btn{display:inline-block;padding:12px 22px;background:var(--brand);color:#fff;border:none;border-radius:8px;font-weight:600;font-size:15px;cursor:pointer;transition:.15s;font-family:inherit;text-align:center}
.btn:hover{background:var(--brand-dark)}
.btn-outline{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn-outline:hover{background:var(--brand);color:#fff}
.btn-danger{background:var(--danger)}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-sm{padding:6px 12px;font-size:13px}
/* Hero */
.hero{background:linear-gradient(135deg,#eff6ff 0%,#dbeafe 100%);padding:80px 0;text-align:center}
.hero h1{font-size:52px;margin-bottom:16px}
.hero p{font-size:19px;color:var(--muted);max-width:640px;margin:0 auto 28px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
@media(max-width:640px){.hero{padding:56px 0}.hero h1{font-size:34px}h1{font-size:28px}}
/* Grids */
.grid{display:grid;gap:20px}
.grid-cats{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));margin-top:24px}
.grid-products{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));margin-top:24px}
/* Cards */
.cat-card{display:block;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#fff;transition:.2s}
.cat-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.08)}
.cat-card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.cat-card-body{padding:16px}
.cat-card h3{font-size:18px;margin:0 0 4px}
.product-card{display:block;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#fff;transition:.2s;color:inherit}
.product-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.product-card img{aspect-ratio:1;object-fit:cover;background:var(--surface)}
.product-body{padding:14px}
.product-sub{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:6px}
.product-name{font-size:15px;font-weight:600;line-height:1.3;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.6em}
.product-rating{font-size:13px;color:var(--muted);margin-bottom:8px}
.product-rating .star{color:var(--accent)}
.product-price{font-weight:800;font-size:17px}
.product-compare{text-decoration:line-through;color:var(--muted);font-size:13px;font-weight:400;margin-left:6px}
/* Product detail */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media(max-width:820px){.product-detail{grid-template-columns:1fr}}
.product-detail img{border-radius:12px;border:1px solid var(--border)}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:16px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.price-row{display:flex;align-items:baseline;gap:10px;margin:12px 0 20px}
.price-row .price{font-size:32px;font-weight:800}
.price-row .compare{font-size:16px}
.feature-list{list-style:none;padding:0;margin:20px 0}
.feature-list li{padding:8px 0;border-bottom:1px solid var(--border);position:relative;padding-left:24px}
.feature-list li:before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:700}
.spec-table{width:100%;margin-top:16px;border-collapse:collapse}
.spec-table td{padding:10px;border-bottom:1px solid var(--border);font-size:14px}
.spec-table td:first-child{color:var(--muted);width:40%}
/* Filter bar */
.filter-bar{display:grid;grid-template-columns:1fr 200px 180px;gap:12px;margin:24px 0}
@media(max-width:640px){.filter-bar{grid-template-columns:1fr}}
.filter-bar input,.filter-bar select{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
/* Cart */
.cart-row{display:grid;grid-template-columns:80px 1fr auto auto auto;gap:16px;align-items:center;padding:16px 0;border-bottom:1px solid var(--border)}
.cart-row img{width:80px;height:80px;object-fit:cover;border-radius:8px}
.qty-btn{width:28px;height:28px;border:1px solid var(--border);background:#fff;border-radius:6px;cursor:pointer;font-weight:600}
.qty-input{width:44px;text-align:center;padding:6px;border:1px solid var(--border);border-radius:6px}
.cart-layout{display:grid;grid-template-columns:1fr 340px;gap:32px}
@media(max-width:820px){.cart-layout{grid-template-columns:1fr}}
.summary-box{border:1px solid var(--border);border-radius:12px;padding:24px;background:var(--surface);height:fit-content}
.summary-row{display:flex;justify-content:space-between;padding:6px 0;font-size:14px}
.summary-row.total{border-top:1px solid var(--border);margin-top:10px;padding-top:12px;font-size:18px;font-weight:700}
/* Forms */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:500}
.field input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit}
.field input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.field .err{color:var(--danger);font-size:12px;min-height:16px}
fieldset{border:1px solid var(--border);border-radius:12px;padding:24px;margin-bottom:20px;background:#fff}
legend{padding:0 8px;font-weight:700;font-size:17px}
/* Footer */
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}
.site-footer a{display:block;color:var(--muted);padding:4px 0;font-size:14px}
.site-footer a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--border);margin-top:32px;padding-top:20px;text-align:center}
/* Article */
article{max-width:760px;margin:0 auto}
article p,article ul{margin-bottom:16px;font-size:16px;line-height:1.7;color:#334155}
article h2{margin-top:32px}
article ul{padding-left:20px}
article ul li{margin-bottom:6px}
/* Success */
.success-box{max-width:640px;margin:40px auto;padding:40px;text-align:center;border:1px solid var(--border);border-radius:16px;background:#fff}
.success-icon{width:80px;height:80px;background:#10b981;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:44px;margin:0 auto 20px}
/* Admin */
.admin-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:16px}
.admin-table th,.admin-table td{border:1px solid var(--border);padding:10px;text-align:left;vertical-align:top}
.admin-table th{background:var(--surface);font-weight:700}
.admin-table pre{white-space:pre-wrap;font-family:inherit;margin:0;font-size:12px}