[Sanjip Shah]

@Petrichor The steps that you have followed are correct.
In the style.css file you should have the following lines.

/*
 Theme Name:     Attitude Pro Child
 Theme URI:      http://example.com
 Description:    Description goes here.
 Author:         Example Author
 Author URI:     http://example.com
 Template:       attitude-pro
 Version:        1.0
*/

/* =Imports styles from the parent theme
-------------------------------------------------------------- */
@import url('../attitude-pro/style.css');