:root {
  --primary: #6c63ff;
  --primary-dark: #5a52d5;
  --secondary: #f8f9ff;
  --accent: #ff6584;
  --text: #2d3748;
  --text-light: #718096;
  --border: #e2e8f0;
  --white: #ffffff;
  --success: #48bb78;
  --warning: #f6ad55;
  --danger: #fc8181;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(108,99,255,0.12);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', -apple-system, sans-serif; background: #f7f8fc; color: var(--text); }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* NAVBAR */
.navbar { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.08); padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 100; }
.navbar-brand { font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.navbar-brand span { color: var(--accent); }
.navbar-links { display: flex; gap: 24px; align-items: center; }
.navbar-links a { font-size: 0.9rem; font-weight: 500; color: var(--text-light); transition: color .2s; }
.navbar-links a:hover { color: var(--primary); }
.btn-nav { background: var(--primary); color: white !important; padding: 8px 20px; border-radius: 25px; font-weight: 600 !important; }

/* HERO */
.hero { background: linear-gradient(135deg, #6c63ff 0%, #a78bfa 50%, #f8f9ff 100%); padding: 80px 24px; text-align: center; color: white; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; margin-bottom: 16px; }
.hero p { font-size: 1.15rem; opacity: 0.9; max-width: 500px; margin: 0 auto 32px; }
.btn-primary { display: inline-block; background: white; color: var(--primary); padding: 14px 36px; border-radius: 50px; font-weight: 700; font-size: 1rem; box-shadow: 0 4px 20px rgba(0,0,0,0.15); transition: transform .2s, box-shadow .2s; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); }

/* SECTION */
.section { padding: 60px 24px; max-width: 1200px; margin: 0 auto; }
.section-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.section-sub { color: var(--text-light); margin-bottom: 32px; }

/* GRID */
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }

/* CARD */
.product-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: transform .2s, box-shadow .2s; display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(108,99,255,0.18); }
.card-img { aspect-ratio: 16/9; object-fit: cover; width: 100%; background: var(--secondary); }
.card-img-placeholder { aspect-ratio: 16/9; background: linear-gradient(135deg, #e0e7ff, #c7d2fe); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.card-body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.card-category { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; color: var(--primary); font-weight: 600; margin-bottom: 6px; }
.card-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text); line-height: 1.4; }
.card-desc { font-size: 0.85rem; color: var(--text-light); margin-bottom: 12px; flex: 1; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.card-price { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.price-main { font-size: 1.2rem; font-weight: 800; color: var(--primary); }
.price-old { font-size: 0.85rem; text-decoration: line-through; color: var(--text-light); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }
.badge-new { background: #e0f2fe; color: #0284c7; }
.badge-hot { background: #fee2e2; color: #dc2626; }
.badge-sale { background: #fef3c7; color: #d97706; }
.badge-best { background: #dcfce7; color: #16a34a; }
.btn-card { width: 100%; padding: 10px; background: var(--primary); color: white; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; font-size: 0.9rem; transition: background .2s; }
.btn-card:hover { background: var(--primary-dark); }

/* FILTER BAR */
.filter-bar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; align-items: center; }
.filter-bar input { flex: 1; min-width: 200px; padding: 10px 16px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.9rem; outline: none; }
.filter-bar input:focus { border-color: var(--primary); }
.filter-btn { padding: 9px 18px; border-radius: 8px; border: 1px solid var(--border); background: white; cursor: pointer; font-size: 0.85rem; transition: all .2s; }
.filter-btn.active, .filter-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }

/* PRODUCT DETAIL */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; max-width: 1000px; margin: 40px auto; padding: 0 24px; }
.product-detail img { border-radius: var(--radius); box-shadow: var(--shadow); }
.product-info .category { color: var(--primary); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.product-info h1 { font-size: 2rem; font-weight: 800; margin: 10px 0; }
.product-info .desc { color: var(--text-light); line-height: 1.8; margin-bottom: 24px; }
.price-block { background: var(--secondary); border-radius: 12px; padding: 20px; margin-bottom: 24px; }
.price-block .price-now { font-size: 2rem; font-weight: 800; color: var(--primary); }
.price-block .price-was { text-decoration: line-through; color: var(--text-light); font-size: 0.9rem; }
.countdown { background: #fff7ed; border: 1px solid #fed7aa; border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; font-size: 0.9rem; color: #c2410c; font-weight: 600; }
.btn-buy { width: 100%; padding: 16px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; border: none; border-radius: 12px; font-size: 1.1rem; font-weight: 700; cursor: pointer; transition: transform .2s; }
.btn-buy:hover { transform: translateY(-2px); }

/* CHECKOUT */
.checkout-wrap { max-width: 480px; margin: 40px auto; padding: 0 16px; }
.checkout-card { background: white; border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; }
.checkout-product { background: var(--secondary); border-radius: 8px; padding: 16px; margin-bottom: 24px; display: flex; gap: 12px; align-items: center; }
.checkout-product img { width: 60px; height: 60px; object-fit: cover; border-radius: 8px; }
.checkout-product .name { font-weight: 700; font-size: 0.95rem; }
.checkout-product .price { color: var(--primary); font-weight: 800; font-size: 1.1rem; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group select { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.95rem; outline: none; transition: border .2s; }
.form-group input:focus, .form-group select:focus { border-color: var(--primary); }
.payment-methods { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.payment-option { border: 2px solid var(--border); border-radius: 10px; padding: 12px; cursor: pointer; text-align: center; transition: all .2s; }
.payment-option:has(input:checked) { border-color: var(--primary); background: #f0eeff; }
.payment-option input { display: none; }
.payment-option .pm-name { font-size: 0.8rem; font-weight: 600; margin-top: 4px; }
.payment-option .pm-fee { font-size: 0.7rem; color: var(--text-light); }
.btn-submit { width: 100%; padding: 15px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; border: none; border-radius: 12px; font-size: 1rem; font-weight: 700; cursor: pointer; }
.error-msg { background: #fee2e2; color: #dc2626; padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }

/* ORDER STATUS */
.status-wrap { max-width: 520px; margin: 60px auto; padding: 0 16px; text-align: center; }
.status-icon { font-size: 5rem; margin-bottom: 16px; }
.status-card { background: white; border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; }
.status-success { color: var(--success); }
.status-pending { color: var(--warning); }
.status-expired { color: var(--danger); }
.order-detail-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; }

/* FOOTER */
footer { background: var(--text); color: #a0aec0; padding: 40px 24px; text-align: center; margin-top: 60px; }
footer strong { color: white; }

/* ADMIN */
.admin-wrap { display: flex; min-height: 100vh; }
.admin-sidebar { width: 240px; background: #1a1f36; color: white; padding: 0; flex-shrink: 0; }
.admin-logo { padding: 24px 20px; font-size: 1.2rem; font-weight: 800; color: white; border-bottom: 1px solid rgba(255,255,255,0.1); }
.admin-nav { padding: 16px 0; }
.admin-nav a { display: flex; align-items: center; gap: 10px; padding: 12px 20px; color: #8892b0; font-size: 0.9rem; transition: all .2s; }
.admin-nav a:hover, .admin-nav a.active { background: rgba(108,99,255,0.2); color: white; border-left: 3px solid var(--primary); }
.admin-main { flex: 1; background: #f7f8fc; padding: 0; overflow: auto; }
.admin-topbar { background: white; padding: 16px 28px; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 1px 4px rgba(0,0,0,0.08); }
.admin-topbar h1 { font-size: 1.2rem; font-weight: 700; }
.admin-content { padding: 28px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: white; border-radius: 12px; padding: 20px; box-shadow: var(--shadow); }
.stat-card .stat-label { font-size: 0.8rem; color: var(--text-light); font-weight: 600; text-transform: uppercase; }
.stat-card .stat-value { font-size: 1.8rem; font-weight: 800; color: var(--text); margin-top: 4px; }
.stat-card .stat-icon { font-size: 1.5rem; margin-bottom: 8px; }
.admin-table { width: 100%; background: white; border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; }
.admin-table table { width: 100%; border-collapse: collapse; }
.admin-table th { background: #f8faff; padding: 12px 16px; text-align: left; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-light); }
.admin-table td { padding: 12px 16px; border-top: 1px solid var(--border); font-size: 0.9rem; }
.admin-table tr:hover td { background: #fafbff; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-pending { background: #fef9c3; color: #713f12; }
.badge-expired { background: #fee2e2; color: #991b1b; }
.admin-btn { padding: 7px 14px; border-radius: 7px; font-size: 0.8rem; font-weight: 600; cursor: pointer; border: none; }
.admin-btn-primary { background: var(--primary); color: white; }
.admin-btn-danger { background: var(--danger); color: white; }
.admin-btn-success { background: var(--success); color: white; }
.form-admin { background: white; border-radius: 12px; padding: 24px; box-shadow: var(--shadow); margin-bottom: 24px; }
.form-admin h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-admin input, .form-admin select, .form-admin textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.9rem; outline: none; }
.form-admin input:focus, .form-admin select:focus, .form-admin textarea:focus { border-color: var(--primary); }
.form-admin label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 5px; color: var(--text); }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 20px; }
.pagination a { padding: 8px 14px; border-radius: 8px; background: white; box-shadow: var(--shadow); font-size: 0.85rem; font-weight: 600; color: var(--primary); }
.pagination a.active { background: var(--primary); color: white; }
@media(max-width:768px) {
  .product-detail { grid-template-columns: 1fr; }
  .payment-methods { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }
}