:root{
    --text: black ;               /*Text colour for normal text and nav.*/
    --nav: rgba(63, 168, 139, 0.65); /*Background colour for the top nav bar */ 
    --articleBG: rgba(255, 255, 255, 0.6); /*Background colour for the article */
    --primary: #3FA88B; /* Primary colour for text, borders and buttons. */
    --white: #ffff;  /* Card colour. */
    --secondary: #225b4b /* hover button */
}