use class .btn-outline-* in class .btn class to get various outline button

use .btn-square in class .btn class to get square button

use .disabled in class .btn class to get Disabled button

use .btn-rounded in class .btn class to get Rounded button

use .btn-rounded in class .btn-outline-* class to get Rounded Outline button

use .btn-glow in class .btn class to get Glow button

use .shadow-[1 / 2 / 3 / 4 / 5] in class .btn class to get Shadow button

use .btn-lg in class .btn class to get Large button

use .btn-sm in class .btn class to get Small button