:root {
    --primary: #5c2b83;
    --secondary: #192a56;
    --accent: #fbc531;
    --bg: #f5f6fa;
    --card: #ffffff;
    --text: #2f3640;
    --muted: #7f8c8d;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Open Sans', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

header { background: #fff; border-bottom: 3px solid var(--primary); box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.top-bar { display: flex; justify-content: space-between; align-items: center; padding: 15px 0; gap: 20px; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo-icon { font-size: 35px; color: var(--primary); margin-right: 12px; }
.logo-text { display: flex; flex-direction: column; }
.brand-name { font-weight: 800; font-size: 24px; color: var(--primary); line-height: 1; }
.brand-sub { font-size: 13px; letter-spacing: 4px; color: var(--muted); }

.search-container { display: flex; gap: 8px; }
.search-container input { padding: 10px 16px; border: 2px solid #eee; border-radius: 50px; font-size: 14px; outline: none; transition: 0.2s; width: 260px; }
.search-container input:focus { border-color: var(--primary); }
.search-container button { background: var(--primary); color: #fff; border: none; border-radius: 50px; padding: 10px 18px; cursor: pointer; font-size: 14px; transition: 0.2s; }
.search-container button:hover { background: var(--secondary); }

.nav-bar { background: var(--secondary); }
.nav-links { display: flex; justify-content: center; overflow-x: auto; }
.nav-link { color: #fff; text-decoration: none; padding: 16px 25px; font-size: 14px; font-weight: 600; text-transform: uppercase; transition: 0.3s; }
.nav-link:hover, .nav-link.active { background: var(--primary); }

.hero-banner { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; padding: 70px 40px; border-radius: 20px; margin-top: 40px; text-align: center; }
.hero-banner h1 { font-size: 42px; font-weight: 800; margin-bottom: 12px; }
.hero-banner p { font-size: 18px; opacity: 0.85; }

.page-header { padding: 40px 0 20px; }
.page-header h1 { font-size: 32px; font-weight: 800; color: var(--secondary); }
.page-header p { color: var(--muted); margin-top: 8px; }

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 30px; padding: 30px 0; }
.product-card { background: var(--card); border-radius: 15px; padding: 25px; border: 1px solid #eee; text-align: center; position: relative; transition: 0.3s; display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-8px); box-shadow: 0 15px 30px rgba(0,0,0,0.08); border-color: var(--primary); }

.product-image { width: 100%; height: 180px; object-fit: contain; margin-bottom: 20px; }
.product-title { font-size: 15px; font-weight: 700; color: var(--secondary); margin-bottom: 15px; min-height: 45px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-price { color: var(--primary); font-weight: 800; font-size: 18px; margin-bottom: 20px; margin-top: auto; }

.btn-details { background: var(--primary); color: #fff; border: none; padding: 14px; border-radius: 50px; cursor: pointer; font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; transition: 0.3s; width: 100%; box-shadow: 0 4px 15px rgba(92,43,131,0.2); }
.btn-details:hover { background: var(--secondary); transform: scale(1.02); }

.category-blocks-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; padding: 20px 0; }
.cat-block { background: var(--card); border: 2px solid #eee; border-radius: 15px; padding: 35px 20px; text-align: center; text-decoration: none; color: var(--secondary); font-weight: 700; font-size: 15px; transition: 0.3s; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.cat-block i { font-size: 32px; color: var(--primary); }
.cat-block:hover { border-color: var(--primary); background: var(--primary); color: #fff; transform: translateY(-5px); box-shadow: 0 10px 25px rgba(92,43,131,0.15); }
.cat-block:hover i { color: #fff; }

.page-padding { padding: 80px 0; }
.fancy-card { background: #fff; padding: 50px; border-radius: 20px; box-shadow: 0 10px 40px rgba(0,0,0,0.03); border: 1px solid #eee; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.info-box { display: flex; align-items: center; gap: 15px; padding: 15px 0; border-bottom: 1px solid #f0f0f0; }
.info-box i { color: var(--primary); font-size: 18px; width: 24px; }

.loading-text { color: var(--muted); padding: 40px; text-align: center; }

.catalog-layout { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; padding-top: 30px; }

.cat-sidebar { background: var(--card); border-radius: 15px; border: 1px solid #eee; padding: 25px; position: sticky; top: 20px; }
.sidebar-title { font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; color: var(--muted); margin-bottom: 15px; padding-bottom: 12px; border-bottom: 2px solid var(--bg); }

.sidebar-cat-group { margin-bottom: 6px; }
.sidebar-cat-top { display: flex; align-items: center; justify-content: space-between; padding: 9px 12px; border-radius: 8px; text-decoration: none; color: var(--text); font-weight: 700; font-size: 14px; cursor: pointer; transition: 0.2s; user-select: none; }
.sidebar-cat-top:hover { background: var(--bg); color: var(--primary); }
.sidebar-cat-top.active { background: var(--primary); color: #fff; }
.sidebar-cat-top .toggle-icon { font-size: 11px; transition: transform 0.2s; flex-shrink: 0; }
.sidebar-cat-top.open .toggle-icon { transform: rotate(90deg); }

.sidebar-children { display: none; padding-left: 12px; margin-top: 2px; }
.sidebar-children.open { display: block; }
.sidebar-child-link { display: block; padding: 7px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); font-size: 13px; font-weight: 600; transition: 0.2s; }
.sidebar-child-link:hover { background: var(--bg); color: var(--primary); }
.sidebar-child-link.active { color: var(--primary); background: rgba(92,43,131,0.07); }

.btn-load-more { background: transparent; color: var(--primary); border: 2px solid var(--primary); padding: 14px 40px; border-radius: 50px; cursor: pointer; font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 1px; transition: 0.3s; }
.btn-load-more:hover { background: var(--primary); color: #fff; }
.btn-load-more:disabled { opacity: 0.5; cursor: not-allowed; }

.breadcrumb { font-size: 13px; color: var(--muted); padding: 10px 0 0; }
.breadcrumb a { color: var(--primary); text-decoration: none; font-weight: 600; }
.breadcrumb a:hover { text-decoration: underline; }

.product-detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 30px; align-items: start; }
.pd-title { font-size: 26px; font-weight: 800; color: var(--secondary); margin-bottom: 8px; line-height: 1.3; }
.pd-brand { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.pd-brand i { margin-right: 5px; }
.pd-section-title { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 2px; color: var(--muted); margin: 22px 0 10px; padding-bottom: 8px; border-bottom: 2px solid var(--bg); }
.pd-divider { border: none; border-top: 1px solid #eee; margin: 20px 0; }

.price-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.price-table th { background: var(--secondary); color: #fff; padding: 10px 12px; text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.price-table td { padding: 9px 12px; border-bottom: 1px solid #f0f0f0; }
.price-table tr:last-child td { border-bottom: none; }
.price-table tr:hover td { background: #f8f4fc; }

.gallery-wrap { display: flex; flex-direction: column; gap: 12px; }
.gallery-main-img { width: 100%; max-height: 420px; object-fit: contain; border-radius: 12px; border: 1px solid #eee; background: #fafafa; padding: 20px; }
.gallery-thumbs { display: flex; gap: 8px; flex-wrap: wrap; }
.gallery-thumb { width: 72px; height: 72px; object-fit: contain; border-radius: 8px; border: 2px solid #eee; cursor: pointer; padding: 5px; background: #fafafa; transition: 0.2s; }
.gallery-thumb:hover { border-color: var(--primary); }
.gallery-thumb.active { border-color: var(--primary); background: #f8f4fc; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 12px; font-weight: 700; color: var(--secondary); margin-bottom: 5px; text-transform: uppercase; letter-spacing: 0.5px; }
.form-input { width: 100%; padding: 11px 14px; border: 2px solid #eee; border-radius: 10px; font-size: 14px; font-family: inherit; outline: none; transition: 0.2s; background: #fafafa; }
.form-input:focus { border-color: var(--primary); background: #fff; }
.form-textarea { min-height: 90px; resize: vertical; }
select.form-input { cursor: pointer; }

.quote-total-bar { display: flex; justify-content: space-between; align-items: center; background: #f8f4fc; border: 2px solid var(--primary); border-radius: 10px; padding: 14px 18px; margin-bottom: 18px; font-size: 15px; }
.quote-total-bar strong { color: var(--primary); font-size: 20px; font-weight: 800; }

.feedback-success { background: #e8f8f0; border: 1px solid #2ecc71; color: #1a7a45; padding: 14px 18px; border-radius: 10px; font-size: 14px; font-weight: 600; }
.feedback-success i { margin-right: 8px; }
.feedback-error { background: #fdecea; border: 1px solid #e74c3c; color: #922b21; padding: 14px 18px; border-radius: 10px; font-size: 14px; font-weight: 600; }
.feedback-error i { margin-right: 8px; }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 5px; }
.spec-table td { padding: 8px 10px; border-bottom: 1px solid #f0f0f0; vertical-align: top; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-label { font-weight: 700; color: var(--secondary); width: 45%; white-space: nowrap; }

.pd-description { font-size: 14px; line-height: 1.7; color: var(--text); }
.pd-muted { color: var(--muted); font-size: 13px; }

.pd-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 18px; }
.pd-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 20px; }
.pd-badge i { font-size: 11px; }
.pd-badge-purple { background: #f3eafa; color: var(--primary); border: 1px solid #d9bff5; }
.pd-badge-blue { background: #eaf2fb; color: #1a5276; border: 1px solid #aed6f1; }
.pd-badge-green { background: #e8f8f0; color: #1a7a45; border: 1px solid #a9dfbf; }

@media (max-width: 768px) {
    .top-bar { flex-direction: column; text-align: center; }
    .search-container input { width: 200px; }
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .hero-banner { padding: 40px 20px; }
    .hero-banner h1 { font-size: 28px; }
    .contact-grid { grid-template-columns: 1fr; }
    .fancy-card { padding: 30px; }
    .catalog-layout { grid-template-columns: 1fr; }
    .cat-sidebar { position: static; }
    .product-detail-layout { grid-template-columns: 1fr; gap: 30px; }
    .form-row { grid-template-columns: 1fr; }
}