CSS Demo:

• Customize buttons: https://szriafan.github.io/angularjs-ui-bootstrap-enhancement/buttons.html
• Align modal center vertically: https://szriafan.github.io/angularjs-ui-bootstrap-enhancement/modal.html
• Support dropdown submenu: https://szriafan.github.io/angularjs-ui-bootstrap-enhancement/dropdown-submenu.html

Directive demo:

• Customize select: https://szriafan.github.io/angularjs-ui-bootstrap-enhancement/select.html