My hashnode blog's custom CSS (blog.aboutdavid.me)

articles.css

/* Headers */
.blog-header {
    background-color: #00FA9A; /* Header background color */
    /* Sticky header */
    position: -webkit-sticky; /* Safari support */
    position: sticky;
    top: 0;
    padding-bottom:3;
}
.mode-dark .blog-header {
    background-color: #66CDAA; /* Header background color */
    /* Sticky header */
    position: -webkit-sticky; /* Safari support */
    position: sticky;
    top: 0;
}
/* Custom headers, underlines and bolds */
h2,h3,h4,h5,h6,b,u {
    background: linear-gradient(rgba(255,0,0,0) 60%, #66CDAA 40%);
    display: inline-block;
}
/* Fix reaction button on sticky header */
blog-content-sidebar {
    padding-top:7%;
}

home.css

header {
    background-color:#00FA9A;
}
.mode-dark header {
    background-color:#66CDAA;
}

pages.css

header {
    background-color:#00FA9A;
}
.mode-dark header {
    background-color:#66CDAA;
}