make serch box for my google serch engine

hello , i want a code to make a serch box like this ( https://ift.tt/2UPQAZm ) because the default code serch box of (Google Custom Search Engine) '' https://ift.tt/1F2i3db '' is too smal with smart phone and tablets so i want to do a big serch box Google Custom Search Engine , can you help me plz

from Search Engine Optimization https://ift.tt/2UKfr0w
via IFTTT