config.css

:root {
  /**
    Specifies the number of columns of text. For example, if your manuscript has
    has two columns, set this to 2. If you have a single column, set this to 1.
  */
  --columns: 1; /* 1, 2, 3 etc. */

  /**
    Specifies the colour scheme of the document. The following variables are
    available for tweaking. The default values are shown below.

    Primary colour is used for links, titles, and other important elements.
    Text colour is used for the main body of text.
    Background colour is used for the background of the document.
    Border colour is used for the border of the document.
    Title colour is used for the title of the document.

    Any valid CSS colour value is acceptable, e.g. rgb(0, 0, 0), #000000, etc.
  */
  --primary-color: #315A3C;
  --text-color: #132521;
  --background-color: #F6F7F6;
  --border-color: var(--primary-color);
  --title-color: var(--primary-color);

  /**
    Specifies the size of the border around the document. Any valid CSS unit is
    acceptable (e.g. px, em, rem, etc.).
  */
  --border-size: 5px;

  /**
    Specifies the size of the text. the size of titles and other elements is
    calculated relative to this value.

    Any valid CSS unit is acceptable (e.g. px, em, rem, etc.).
  */
  --text-size: 1rem; /* sets the  */

  /**
    Set the align of the body text. Any valid CSS align value is acceptable
    (e.g. left, right, center, justify).
  */
  --text-align: justify;

  /**
    Sets the maximum width of the document. Any valid CSS unit will do
    (e.g. px, em, rem, etc.). The document is centred on the page and the
    final width is calculated relative to the number of columns specified above.
  */
  --max-width: 700px;
}