Header image resize on pad and iphone

In the “Additional CSS” section of the dashboard add this:

@media screen and (max-width: 480px) {
    .has-header-image.twentyseventeen-front-page .site-branding, 
    .has-header-video.twentyseventeen-front-page .site-branding, 
    .has-header-image.home.blog .site-branding, 
    .has-header-video.home.blog .site-branding,
    .has-header-image.twentyseventeen-front-page .custom-header, 
    .has-header-video.twentyseventeen-front-page .custom-header, 
    .has-header-image.home.blog .custom-header, 
    .has-header-video.home.blog .custom-header {
        display: block;   
        height: auto;
        left: 0;
        max-width: 100%;
        min-height: 0;
        -o-object-fit: unset;
        object-fit: unset;
        position: relative;
        -ms-transform: none;
        -moz-transform: none;
        -webkit-transform: none;
        transform: none;
    }

    .has-header-image.twentyseventeen-front-page .site-branding, 
    .has-header-video.twentyseventeen-front-page .site-branding, 
    .has-header-image.home.blog .site-branding, 
    .has-header-video.home.blog .site-branding,
    .custom-header-media,
    .has-header-image .custom-header-media img, 
    .has-header-video .custom-header-media video, 
    .has-header-video .custom-header-media iframe {
        position: static;
    }

    .has-header-image .custom-header-media img, 
    .has-header-video .custom-header-media video, 
    .has-header-video .custom-header-media iframe, 
    .has-header-image:not(.twentyseventeen-front-page):not(.home) .custom-header-media img {
        min-height: 1px;
        -o-object-fit: unset;
        object-fit: unset;
    }

    .custom-header-media:before {
        background: none;
    }

    body.has-header-image .site-description, 
    body.has-header-video .site-description {
        color: #222;
        opacity: 1;
    }

    .site-branding .wrap {
        padding: 0 1em;
    }
}

@media screen and (max-width: 768px) {
    .custom-header-media,
    .has-header-image .custom-header-media img {
        display: block;
        position: static;
    }

    .has-header-image.home.blog .custom-header {
        height: auto;
    }

    .has-header-image.home.blog .site-branding {
        left: 0;
        position: absolute;
        top: 0;
    }
    
    .has-header-image.twentyseventeen-front-page .site-branding, 
    .has-header-video.twentyseventeen-front-page .site-branding, .has-header-image.home.blog .site-branding, 
    .has-header-video.home.blog .site-branding {
        display: block;
    }
}

https://codex.www.ads-software.com/CSS#Custom_CSS_in_WordPress

Hi Andrew. The sight title and tag line are working now. The image I have in the header isn’t though. I used 2000×1200. Should the image be a different size? Site is https://www.lauderdaleluxuryhomes.com
Thanks
Gerry

When I checked your Additional CSS area on your site, it wasn’t showing my code. Can you make sure you’ve copied all of the code I recommended.