How can I reduce the height of my collection banner?

Store Design
1

IMG_3683.jpeg
IMG_3683.jpeg1170×845 32.9 KB

Hi how can I make my collection banner height smaller. This is my website preview link

https://29ea2f-3.myshopify.com/?_ab=0&_fd=0&_sc=1

2
  1. Go to online store
  2. Click on edit code
  3. open your base.css file
  4. Paste the below code and save

.collection-hero__title {margin: 0.5rem 0;}