Having difficulties centering input and text with borders - html

Question

I am having difficulties centering a an input and borders around text that I created. I am trying to center it with a percentages based setting, so that it becomes more responsive. It seems the percentages are off and every time I go over left: 35%;, it does not move over anymore.
The same applies to my submit button, inside of the search input. I took the percentage left out because it did not do anything.
I have stored all of my code inside of this fiddle:
https://jsfiddle.net/ghp4t489/
But, to get the best option to view what I am trying to do, is to visit my website. realtorcatch.com/test_index
How can I get the text with borders/search bar to be centered in the page?
Here is my CSS
.search_option_container_out {
text-align: center;
top: 450px;
left: 30%;
position: absolute;
z-index: 111;
}
.search_option_box {
position: absolute;
text-align: center;
left: 40%;
}
.search_option_box li {
display: inline;
border: 1px solid black;
line-height: 2em;
padding: 20px 75px;
background: rgba(24, 24, 24, 0.3);
color: #FFFFFF;
cursor: pointer;
}
.search_option_box li:hover {
background: rgba(0,0,255, 0.3);
}
.home_searchbar_out {
text-align: center;
padding-top: 60px;
}
.home_searchbar {
padding: 10px;
}
.home_search_input {
position: absolute;
left: 45%;
width: 575px;
padding: 14px;
font-size: 1.1em;
}
#home_search_submit {
padding: 11px 20px;
position: absolute;
background-color: blue;
color: #FFFFFF;
cursor: pointer;
font-size: 1.1em;
z-index: 1;
}

Answer 1

your code demo here: https://jsfiddle.net/ghp4t489/4/
essentially, you want to use the concept of centering a container inside the page like so:
div {
width: 100px;
height: 100px;
border: 1px solid black;
position: absolute;
top:0;
bottom: 0;
left: 0;
right: 0;
margin: auto;
}
<div>my div here</div>
this code is using margin: auto to center the div in the page.
EDIT: https://jsfiddle.net/ghp4t489/7/ with button on the right and next to the input
https://jsfiddle.net/ghp4t489/9/ with button on right inside the input