This is an example of a user login form which can be accessed through a modal, designed using CSS, HTML, and Bootstrap framework 4. The login form consists of the input text fields, the 'Login' button, and the user avatar image. The body of the form is given a font-family style as 'Varela Round', sans-serif. The form is given a background color of #636363 and a width of 350px. The title of the login card is displayed with text-align style as center, and font-size as 26px. The input text fields take a border color effect as #70c5c0, in the focus mode. The avatar image is given a background color as #60c7c1, box-shadow style as 0px 2px 2px rgba(0, 0, 0, 0.1), and the border-radius as 50% to get the circle shape. The 'Login' button is given a background color of #60c7c1, which gets changed to #45aba6, on hover. Source:https://www.tutorialrepublic.com/snippets/preview.php?topic=bootstrap&file=elegant-modal-login-form-with-avatar-icon