How do you change the length of google search bar?

i want a code for firefox extension stylish



this is what i currently have



input[title=%26quot;Google Search%26quot;]{

width: 500px !important;

padding:5px !important;

font-size:14px !important

}



center p font{

display:none !important

}



center font {

visibility: hidden !important

}

center font b a{

visibility: visible !important

}



#gbar{

visibility:hidden !important

}



#guser{

visibility:hidden !important

}



input[type=%26quot;submit%26quot;][name*=%26quot;btn%26quot;]{

visibility:hidden !important

}



so please add something to that to shorten the length of search bar
How do you change the length of google search bar?
This code at the top:

input[title=%26quot;Google Search%26quot;]{

width: 500px !important;

padding:5px !important;

font-size:14px !important

}



change 500px to something smaller, like 200px.