redstrate.com/themes/red/assets/css/site.css

/* desktop devices */
@media (min-width: 768px) {
    aside {
        flex: 200px 0 0;
    }

    header {
        margin: 10px;
    }

    aside {
        margin: 10px;
    }

    article {
        margin: 10px;
    }

    footer {
        margin: 10px;
    }
}

/* mobile devices */
@media (max-width: 768px) {
    aside {
        width: 100%;
    }

    aside div {
        padding: 2px;
    }

    aside div a {
        font-size: 135%;
        margin-top: 13px;
        margin-bottom: 13px;
    }
}

body {
    background-color: var(--background-primary);
    accent-color: var(--accent-color);

    display: flex;
    flex-flow: row wrap;

    color: var(--text-color);
}

:root {
    --primary-accent: #9f5858;
    --secondary-accent: #c99192;
    --border-color: #325e8d;
    --background-primary: #eff1ff;
    --background-secondary: #ffffff;
    --text-color: #363131;
    --link-visited: #460b0b;
    --extra-color: #efe4e4;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-accent: #ce4545;
        --secondary-accent: #c99192;
        --background-primary: #34313a;
        --background-secondary: #3c3a44;
        --border-color: #515860;
        --text-color: #fbeded;
        --link-visited: #ad1616;
        --extra-color: #504e5a;
    }

    .ext-link {
        filter: invert(100%);
    }
}

a:link {
    color: var(--primary-accent);
}

a:visited {
    color: var(--link-visited);
}

header {
    flex-grow: 1;
    flex-basis: 100%;
}

aside {
    background-color: var(--background-secondary);

    text-align: center;

    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 15px;
}

article {
    background-color: var(--background-secondary);

    border: 1px solid var(--border-color);
    border-radius: 3px;

    padding: 15px;

    flex: 2 0;
}

footer {
    background-color: var(--background-secondary);

    flex-grow: 1;
    flex-basis: 100%;

    border: 1px solid var(--border-color);
    border-radius: 3px;

    padding: 15px;
}

.site-menu {
    width: 100%;
    border: 1px solid gray;
    border-radius: 5px;
    margin-top: 5px;
    margin-bottom: 5px;
}

.article-img {
    width: 100%;
    height: auto;
}

.gallery-img {
    border: 1px black solid;
    border-radius: 5px;
}

figure {
    flex-grow: 1;
    text-align: center;
    margin: 25px;
}

figure figcaption {
    text-align: center;
}

.gallery-con {
    display: flex;
    flex-wrap: wrap;
    border: 1px solid gray;
}

td {
    text-align: center;
}

tr:nth-child(even) {
    background-color: var(--extra-color);
}

table {
    width: 100%;
}

#f-badges {
    text-align: center;
}

#f-badges * {
    display: inline;
    margin-left: 0.2em;
    margin-right: 0.2em;
}

#f-list {
    text-align: center;
}

#f-list * {
    display: inline;
    margin-left: 1em;
    margin-right: 1em;
}

h2 {
    margin-top: 0.2em;
}