clio/docs/doxygen-awesome-theme/doxygen-custom/custom.css

.github-corner svg {
    fill: var(--primary-light-color);
    color: var(--page-background-color);
    width: 72px;
    height: 72px;
}

@media screen and (max-width: 767px) {
    .github-corner svg {
        width: 50px;
        height: 50px;
    }
    #projectnumber {
        margin-right: 22px;
    }
}

.title_screenshot {
    filter: drop-shadow(0px 3px 10px rgba(0,0,0,0.22));
    max-width: 500px;
    margin: var(--spacing-large) 0;
}

.title_screenshot .caption {
    display: none;
}

#theme-selection {
    position: fixed;
    bottom: 0;
    left: 0;
    background: var(--side-nav-background);
    padding: 5px 2px 5px 8px;
    box-shadow: 0 -4px 4px -2px var(--side-nav-background);
    display: flex;
}

#theme-selection label {
    border: 1px solid var(--separator-color);
    border-right: 0;
    color: var(--page-foreground-color);
    font-size: var(--toc-font-size);
    padding: 0 8px;
    display: inline-block;
    height: 22px;
    box-sizing: border-box;
    border-radius: var(--border-radius-medium) 0 0 var(--border-radius-medium);
    line-height: 20px;
    background: var(--page-background-color);
    opacity: 0.7;
}

@media (prefers-color-scheme: dark) {
    html:not(.light-mode) #theme-select {
        background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' fill='%23aaaaaa'><polygon points='0,0 100,0 50,50'/></svg>") no-repeat;
        background-size: 8px;
        background-position: calc(100% - 6px) 65%;
        background-color: var(--page-background-color);
    }
}

html.dark-mode #theme-select {
    background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' fill='%23aaaaaa'><polygon points='0,0 100,0 50,50'/></svg>") no-repeat;
    background-size: 8px;
    background-position: calc(100% - 6px) 65%;
    background-color: var(--page-background-color);
}

#theme-select {
    border: 1px solid var(--separator-color);
    border-radius: 0 var(--border-radius-medium) var(--border-radius-medium) 0;
    padding: 0;
    height: 22px;
    font-size: var(--toc-font-size);
    font-family: var(--font-family);
    width: 215px;
    color: var(--primary-color);
    border-left: 0;
    display: inline-block;
    opacity: 0.7;
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' fill='%23888888'><polygon points='0,0 100,0 50,50'/></svg>") no-repeat;
    background-size: 8px;
    background-position: calc(100% - 6px) 65%;
    background-repeat: no-repeat;
    background-color: var(--page-background-color);
}

#theme-selection:hover #theme-select, #theme-selection:hover label {
    opacity: 1;
}

#nav-tree-contents {
    margin-bottom: 30px;
}

@media screen and (max-width: 767px) {
    #theme-selection {
        box-shadow: none;
        background: none;
        height: 20px;
    }

    #theme-select {
        width: 80px;
        opacity: 1;
    }

    #theme-selection label {
        opacity: 1;
    }

    #nav-path ul li.navelem:first-child {
        margin-left: 160px;
    }

    ul li.footer:not(:first-child) {
        display: none;
    }

    #nav-path {
        position: fixed;
        bottom: 0;
        background: var(--page-background-color);
    }
}