Make all boarders thinner in broadcast theme

Store Design
1

I am wanting to make all existing boarders in the whole website .5px instead of 1px

Here is a link to the site:

https://d2o3ozsiv0qzx2eb-10538778683.shopifypreview.com

2

Modify your image_fill class css as

.image__fill {
display: block;
position: relative;
overflow: hidden;
border:5px solid #000 !important;

}

3

@SundayMorning

.collection-item {
    border-top: black solid 0.1px!important;
    border-left: black solid 0.1px!important;
    border-bottom: black solid 0.1px!important;
}

Add this code in the bottom of custom.css file.