org-theme/scss/partials/_codes.scss

@mixin src-box {
    display: inline;
    position: absolute;
    color: $color-text-shadow;
    background-color: $white;
    padding: 0px 4px;
    border: 1px solid $color-shadow;
    font-size: 0.6rem;
    top: -9px;
    z-index: 10;
    font-family: $mono;
}

// Div that containst the code
.org-src-container {
    position: relative;
    overflow: visible;
    margin-top: 1em;

    // Caption
    label {
        text-align: center;
        cursor: text;
        font-size: 0.85rem;
        font-family: $serif;
        font-style: italic;
        color: $color-caption;

        // Listing num
        .listing-number {
            font-weight: $bold;
            color: $color-caption-num;
        }
    }

    // Copy Button
    div.src-copy {
        @include src-box;
        line-height:1.5;
        right: 10px;
        cursor: pointer;

        // When button is clicked
        &.src-copied {
            color: $color-text-invert;
            background-color: $color-primary;
        }
    }

    // Line numbers
    .linenr {
        color: $color-text-shadow;;
    }

    // Code Block
    > pre {
        position: relative;
        overflow: visible;
        border:1px solid $color-shadow;
        background: $white;
        display: block;
        font-family: $mono;
        font-size: 0.75rem;
        line-height: 1.5;
        padding: 12px;
        margin-bottom: 24px;
        white-space: pre-wrap; // Wrap long Line

        // Box containing language Names
        &.src:before {
            @include src-box;
            left: 10px;
        }

        // Languages Names
        &.src-emacs-lisp:before { content: 'Emacs Lisp'; }
        &.src-elisp:before      { content: 'Emacs Lisp'; }
        &.src-sh:before         { content: 'shell'; }
        &.src-bash:before       { content: 'bash'; }
        &.src-org:before        { content: 'Org mode'; }
        &.src-python:before     { content: 'Python'; }
        &.src-latex:before      { content: 'LaTeX'; }
        &.src-matlab:before     { content: 'Matlab'; }
        &.src-bibtex:before     { content: 'BibTeX'; }
    }
}

// Results blocks
pre {
    &.example {
        position: relative;
        background: $color-background;
        border: 1px solid $color-shadow;
        color: $color-text;
        font-size: 0.75rem;
        line-height: 1.5;
        margin-bottom: 24px;
        padding: 12px;
        font-family: $mono;

        //
        &:before {
            @include src-box;
            content: "Results";
            display: inline;
            left: 10px;
        }
    }
}

// Additional Formating of the code itself
.org-type {
    color: #228b22;
}
.org-comment {
    color: #999988; font-style: italic;
}
.org-comment-delimiter {
    color: #999988; font-style: italic;
}
.org-string {
    color: #dd1144;
}
.org-matlab-cellbreak {
    text-decoration: underline;
    text-decoration-color: #999988;
}
.org-constant {
    color: #008b8b;
}
.org-variable-name {
    color: teal;
}