Issues Customizing Header

I’m new to customizing headers in WP. The site title and tagline do not appear in the header area where I want it. Instead, the site title and tagline appear below the image. I created a twentyseventeen child theme and placed the following css:

.site-content-contain {
background-color: #d5ffa0;
position: relative;
}

.site-title {
font-size: 100%;
margin-top: 0;
line-height: 7;
}

.header-image .site-title a {
float:left;
margin: 0;
}

.site-header .wrap {
padding:0;
}

/* Change header HEIGHT */
.site-header {
height: 200px !important;
}

Thanks in advance for your help!

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