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

        html, body {
            width: 100%;
            overflow-x: hidden;
        }

        .navbar {
            background-color: #ADD8E6;
            padding: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            width: 100%;
        }

        .dropbtn {
            font-size: 28px;
            padding: 10px 20px;
            cursor: pointer;
        }

        .search-container {
            display: flex;
            align-items: center;
        }

        .search-form input {
            padding: 5px;
            margin-left: 10px;
        }

        .main-content ul {
            list-style-type: none;
            padding: 0;
            margin: 10px 0;
        }

        .main-content li {
            margin: 10px 0;
            width: 100%;
        }

        .thumbnail {
            max-width: 100%;
            height: auto;
        }

        .footer {
            text-align: center;
            padding: 20px;
            background-color: #f1f1f1;
            width: 100%;
        }

        @media (max-width: 768px) {
            .navbar {
                flex-direction: column;
            }

            .dropbtn {
                font-size: 20px;
                padding: 10px 15px;
            }

            .search-container {
                width: 100%;
                justify-content: center;
            }

            .search-form input {
                width: 80%;
                margin: 10px auto;
            }

            .main-content {
                padding: 10px;
                width: 100%;
            }

            .footer {
                font-size: 14px;
            }
        }