body {
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        min-height: 100vh;
    }

    header, footer {
        background-color: #299E8E;
        color: #fff;
        text-align: center;
        padding: 10px 0;
    }

    .container {
        text-align: center;
        margin-top: auto;
        margin-bottom: auto;
    }

    .hidden {
        display: none;
    }

    #image-container, #image-container2 {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        margin-bottom: 10px;
    }

    #image-container img {
        width: 50px;
        height: 50px;
        margin: 5px;
    }

    #image-container2 img {
        width: 50px;
        height: 50px;
        margin: 5px;
    }