This is an example of a search bar with hover effects, designed using CSS, HTML, and Bootstrap framework 4. The body of the form is given a background color of #e74c3c, and the height and the width are set as 100%. The search input is given a style set of font color as white, margin-top as 5px, line-height as 40px, and transition value as width 0.4s linear. The caret color of the search input is set as red. In a hover event. The search icon is given a style set of height and width as 50px, float as right, display as flex, justify-content as center, align-items as center, border-radius as 50% to get the circle shape, font color as white, and background-color as black. The search icon changes its background color to red and the font color to #fff. Source: https://bbbootstrap.com/snippets/awesome-search-bar-hover-17080978