Add to cart button alignment - help

[sophl]

I've added the below to my product-grid-item.liquid but the alignment is off.

<form method="post" action="/cart/add">
<input type="hidden" name="id" value="{{ product.variants.first.id }}" />
<input min="1" type="number" id="quantity" name="quantity" value="1"/>
<input type="submit" value="Add to cart" class="btn" />
</form>

Anyone know how to sort this so the add to cart button is in center with the image above it relates too + horizontally lined with the other add to cart buttons on the same row?

I use Minimal theme if that makes any difference. 

[JHKCreate]

Hi @sophl 

Would you mind sharing your store's URL so we can provide the code to solve this?

[sophl]

Hi, I only have the preview option available as I'd like to solve this before setting it as my main theme: https://gdrs27gmddm96utn-47691432085.shopifypreview.com

Would this work?