because every checkbox is linked to a condition that has to be displayed under it directly
I do not see anything in your lss that had to be displayed depending on the checkboxes.
What do you want to achieve with the design?
Okay, you can use the css classes "no-question" and "no-bottom" to merge the questions.
Add them to the "custom.css" of your extended theme.
Code:
.no-question{border-top:0;}
.no-question .question-title-container{display:none;}
.no-question .question-valid-container{display:none;}
.no-bottom{border-bottom:0;margin-bottom:0;}
.no-question .answer-container {
padding-top: 0em;
padding-bottom: 0.5em;
}
.no-bottom .answer-container {
padding-bottom: 0em;
}
Put the css class "no-question" into the questions "css classes" where you do not want to display the question container.
"no-bottom" doesn't siplay the bottom.
But as far as we do not know what you would like to display directly under the checkbox, we cannot help better, proposing other, better solutions.
Joffm