Help i just broke my store layout while editing the theme css. How to restore?

Hi there.
Shopify Theme: Artisan 1.4.2
URL: www.TzufArtAndSoul.com

I need some serious help and was hoping someone here could help out.
I was editing my themes css file to try and fix an issue with ‘free shipping’ bar.
Apparently i made a big mistake, because the whole store doesnt look right anymore.

Note to self, dont fool around with css on your own when you dont understand what your doing
I really hope someone can help me fix this up as were just doing a campaign for our store.

Here are the lines in the themes css file which i may have edited, although im not sure if this is it or not.
perhaps someone who understands about it can see an obvious error im missing
It may have nothing to do with this tidbit from the css file.

{{ content_for_header }}

.slideshow { opacity: 1; }

.product_gallery {
opacity: 1;
}

.mainBar__container.overflow–hidden {
overflow: visible;
}

.newsletter-popup.remodal {
display: none;
}

.fallbackImage {
max-width: 100%;
}

.noscript {
display: block;
}

img.lazyload[src*=“_100x”],
img.lazyload[src*=“_50x”] {
display: none;
}

.product_gallery_nav {
display: none;
}

/* remove free shipping bar */ .80c-mars1, .mars-stack-item, .80c-mars14 .80c-mars21 .80c-mars27 .80c-mars16 .80c-mars30 { visibility: hidden !important; display: none !important; } {% include 'fa_translate_core' %}

{% render ‘shogun-head’ %}

1.-Go to theme store and create a new store with your theme.
2.-check out the original .css and copy a paste the code on your broken theme.

Always remember to create a copy of your theme when editing the codes to avoid having these issues. It is always fun to learn to edit codes on the go, just have a back up.

This is not the issue with those code that you added. The problem is your theme’s styles.css file is blank. Please check

Thanks. yes this was the issue.

The theme support just replied to me via email and sent me a new css file to copy and past there. it fixed the issue

I’m glad to hear that.

Thanks. turns out that the original css file needed to be redone.
The theme support service sent me a backup styles.css via email which i copied pasted and that fixed it