body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f2f5;
            color: #333;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        header {
            background-color: #2c3e50; /* Màu xanh đậm */
            color: #ecf0f1;
            padding: 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: #ecf0f1;
            text-decoration: none;
            font-size: 24px;
            font-weight: bold;
        }
        .search-form {
            display: flex;
        }
        .search-form input[type="text"] {
            border: none;
            padding: 8px 12px;
            border-radius: 5px 0 0 5px;
            font-size: 16px;
            outline: none;
        }
        .search-form button {
            border: none;
            background-color: #3498db; /* Màu xanh da trời */
            color: white;
            padding: 8px 15px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.3s;
        }
        .search-form button:hover {
            background-color: #2980b9;
        }
        main {
            padding: 20px 0;
        }
        .gallery {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            padding: 20px 0;
        }
        .gallery-item {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            overflow: hidden;
            text-decoration: none;
            color: inherit;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .gallery-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 12px rgba(0,0,0,0.15);
        }
        .gallery-item img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .item-title {
            padding: 15px;
            font-size: 18px;
            font-weight: bold;
            text-align: center;
        }
        .listing-style {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding: 20px 0;
        }
        .listing-item {
            background-color: white;
            padding: 10px 15px;
            border-radius: 5px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            text-decoration: none;
            color: #333;
            transition: background-color 0.2s;
        }
        .listing-item:hover {
            background-color: #e9ecef;
        }