ethanyoo.com/themes/geronimo/static/css/style.css

/* Body */
a,
a:link {
    text-decoration: none;
    color: #ace;
}
a:hover {
    background: #2b5278;
    text-decoration: underline dotted;
    border: 1px solid;
}
header a:link,
header a:visited,
footer a:link,
footer a:visited,
aside a:visited,
main a:visited {
    color: #FFF;
}
body {
    background: #10151a;
    color: #d3dae3;
    font: 1em/1.5 sans-serif;
    margin: 2em auto;
    max-width: 50em;
    padding: 0 2em;
}
h2,
main h1 {
    text-align: center;
}
h1 {
    font-size: 2.1em;
}
h2 {
    font-size: 1.8em;
}
h3 {
    font-size: 1.5em;
}
article,
main {
    padding: 4px 2px;
}
blockquote {
    padding: 0.25em 1.5em;
    background: #ddd;
    color: #000;
    border-radius: 4px;
}
code {
    background: #000;
    font: 1em/1.5 monospace, monospace;
    padding: 2px;
}
img[src$='#center'] {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* Light theme */
@media (prefers-color-scheme: light) {
    body {
        background: #f2f2f2;
        color: #000;
    }
    header a:link,
    header a:visited,
    footer a:link,
    footer a:visited,
    aside a:link {
        color: #000;
    }
    a:hover {
        background: #cae6ef;
        text-decoration: underline dotted;
        border: 1px solid;
    }
    main a:link {
        color: #004962;
    }
    main a:visited,
    aside a:visited {
        color: #542baa;
    }
    code {
        background: #ccc;
        color: #000;
        font: 1em/1.5 monospace, monospace;
        padding: 2px;
    }
}

/* Classes */
.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
.nextcloud {
    width: 50px;
    height: 30px;
    position: relative;
    top: 8px;
    background-size: contain;
    display: inline-block;
    background-repeat: no-repeat;
    background-position: center center;
}
.post-title {
    line-height: 1.8;
}
.subtitle {
    float: right;
}
a.link-000 {
    background: #000;
    border: none;
}
a.link-001 {
    padding: 10px;
    background-color: #0082c9;
    color: #ffffff;
    border-radius: 3px;
    padding-left: 4px;
}
html {
    overflow-y: scroll;
    visibility: visible;
    opacity: 1;
}