We have styled all Bootstrap elements just as you want!
Use the button classes on an <a>, <button>, or <input> element.
Use any of the available button classes to quickly create a styled button.
Fancy larger or smaller buttons? Add .btn-lg, .btn-sm, or .btn-xs for additional sizes.
Create block level buttons—those that span the full width of a parent— by adding .btn-block.
Buttons will appear pressed (with a darker background, darker border, and inset shadow) when active. For <button> elements, this is done via :active. For <a> elements, it's done with .active. However, you may use .active on <button>s (and include the aria-pressed="true" attribute) should you need to replicate the active state programmatically.
Make buttons look un-clickable by fading them back with opacity. Add the disabled attribute to <button> buttons.