Bootstrap 3 inline form for Contact Form 7 (only tested with 1 input field and 1 submit button)

cf7-inline-form.less

/*
 *
 * Bootstrap 3 inline form for Contact Form 7
 *
 * In the shortcode, you must use html_id="my-id"
 * or html_class="my-class" to target a specific form
 *
 * Actual form sample:
 *   <label for="your-email">Email:</label>
 *   [email* your-email 0/ placeholder "enter your email"]
 *   <span><button type="submit" class="wpcf7-form-control">Submit</button></span>
 *
 * Example 1 (affects targeted form class only): .my-form-class { &:extend(.cf7_inline all); }
 * 
 * Example 2 (affects all Contact Form 7 forms): .wpcf7-form { &:extend(.cf7_inline all); }
 *
 */

.cf7_inline {
	& .wpcf7-form-control-wrap {
		&:extend(.form-inline .form-group, .form-group);
		> input {
			&:extend(.form-inline .form-control);
		}
	}
}