:root {
            --primary-color: #A34839; /* Mô phỏng màu đỏ/hồng sẫm cho text */
            --secondary-color: #333;
            --light-grey: #f8f8f8;
            --main-font: 'Jost', sans-serif;
            --serif-font: 'Playfair Display', serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: var(--main-font);
            color: var(--secondary-color);
            background-color: white;
            line-height: 1.6;
        }

        .container {
            width: 80%;
            max-width: 1200px;
            margin: 0 auto;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        /* HEADER */
        .header {
            border-bottom: 1px solid var(--light-grey);
            padding: 20px 0;
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo a {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: 2px;
        }

        .nav-menu, .nav-icons {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-menu a {
            font-size: 14px;
            font-weight: 500;
            text-transform: uppercase;
        }

        .nav-icons span {
            font-size: 18px; /* Dùng placeholder cho icons */
        }
        
        .cart-info {
            font-size: 14px;
            font-weight: 500;
        }
        
        /* HERO SECTION */
        .hero-section {
            display: flex;
            margin-top: 50px;
            gap: 20px;
         
        }

        .hero-content {
            flex: 1;
            padding: 50px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
        }
        
        .hero-content::before, .hero-content::after {
            content: "←";
            position: absolute;
            font-size: 30px;
            color: #ccc;
            top: 50%;
            transform: translateY(-50%);
        }
        .hero-content::before { left: -50px; }
        .hero-content::after { content: "→"; right: -50px; }


        .hero-title {
            font-size: 48px;
            font-weight: 400;
            line-height: 1.1;
            margin-bottom: 20px;
        }

        .hero-title strong {
            font-weight: 700;
            color: var(--primary-color);
        }

        .hero-text {
            font-size: 15px;
            color: #666;
            margin-bottom: 30px;
            max-width: 450px;
        }

        .hero-signature {
            font-family: var(--serif-font);
            font-style: italic;
            font-size: 50px;
            color: var(--primary-color);
        }

        .hero-image {
            flex: 1;
            text-align: right;
        }

        .hero-image img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* PRODUCT FILTER */
        .product-filter {
            border-bottom: 1px solid #eee;
            padding-bottom: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .filter-categories {
            display: flex;
            gap: 30px;
            margin-bottom: 20px;
        }

        .filter-categories a {
            font-size: 14px;
            font-weight: 500;
            text-transform: uppercase;
            color: #666;
            padding-bottom: 5px;
            transition: all 0.3s ease;
        }

        .filter-categories a:hover {
            color: var(--secondary-color);
        }

        .filter-categories a.active {
            color: var(--secondary-color);
            border-bottom: 1px solid var(--secondary-color);
            font-weight: 600;
        }

        .filter-dropdown {
            font-size: 14px;
            color: #666;
            cursor: pointer;
            padding: 8px 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .filter-dropdown:hover {
            background-color: #f5f5f5;
            border-color: #ccc;
        }
        .text-3xl{
        padding: 2rem 0;
        border-bottom: 1px solid #eee;
        margin-bottom: 3rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        }

        @media (max-width: 768px) {
            .filter-categories {
                flex-wrap: wrap;
                gap: 15px;
                margin-bottom: 15px;
            }
        }

        /* PRODUCT GRID */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            
        }

        .product-item {
            text-align: center;
            position: relative;
        }

        .product-image-wrapper {
            background-color: var(--light-grey); 
            height: 300px; /* Chiều cao cố định mô phỏng */
            overflow: hidden;
            margin-bottom: 15px;
            display: flex;
            align-items: flex-end; /* Để hình ảnh trông giống như trong mockup */
            position: relative;
        }
        
        .product-image-wrapper.cactus { background-color: white; }
        .product-image-wrapper.lily { background-color: white; }

        .product-image-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        
        /* Hiệu ứng "Sold" */
        .product-item .sold-tag {
            position: absolute;
            top: 10px;
            left: 10px;
            background-color: var(--primary-color);
            color: white;
            padding: 5px 10px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            z-index: 10;
        }

        .product-title {
            font-size: 16px;
            font-weight: 500;
            margin-bottom: 5px;
        }

        .product-price {
            font-size: 14px;
            color: var(--primary-color);
            font-weight: 700;
        }

        /* MÔ PHỎNG NÚT RELATED */
        .related-buy {
            position: fixed; /* Hoặc absolute trong container lớn */
            top: 250px;
            right: 10%;
            background-color: var(--primary-color);
            color: white;
            padding: 10px;
            border-radius: 5px;
            text-align: center;
            font-size: 12px;
            z-index: 100;
            width: 80px;
            display: flex;
            flex-direction: column;
            gap: 5px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .related-buy .buy-now {
            background-color: white;
            color: var(--primary-color);
            padding: 5px;
            font-weight: 700;
        }
        
        /* ĐIỀU CHỈNH TULIP TRONG LƯỚI */
        .tulip-grid-item .product-image-wrapper {
             background-color: white;
        }