changing the navigation/header bar from horizontal right to the left & vertical

I am looking to make the navigation and header bar a list running vertically that is justified to the left of the page. Here is an example of the type of header I am looking for. I would also like the navigation list to be fixed and 'follow' you as you navigate and scroll the site. Can someone help me figure out the css code for this and how to apply it? Please view example below.

Hi can someone help me with this issue?

Try adding this to Design > Custom CSS

// Vertical Navigation //

.header-nav-list {
  width: 135vh !important;
  padding: 25px;
  background: #000000;
  position: fixed;
  -webkit-transform:rotate(-90deg)translateX(-85%);
  -webkit-transform-origin: top left;
  left: 0px;
  top: 0px;
  text-align: center;
  z-index: 999;
}

@tuanphan thanks for your message. I entered the code and this happened to the header

can you help me resolve?

Hi, 

I am following up on this, can someone please help me resolve this?

@tuanphan I tried the code you provided but got this black bar. Could you please help resolve to get the vertical header??

On 3/12/2023 at 1:19 PM, arkitekt said:

@tuanphan I tried the code you provided but got this black bar. Could you please help resolve to get the vertical header??

What is your site url? We can check problem easier

I have the same issue. Would you be able to help me? 

here's my site: https://bobcat-gerbil-r97k.squarespace.com/config/pages/website-tools/custom-css

On 2/6/2024 at 7:06 AM, WrrnB said:

I have the same issue. Would you be able to help me? 

here's my site: https://bobcat-gerbil-r97k.squarespace.com/config/pages/website-tools/custom-css

Can you check site again?

@tuanphanHi, would you be able to update this code for me so it doesn't have a black bar on the side? My website is this. Thanks. https://www.emmalinecarter.com/

On 4/16/2024 at 3:04 AM, Emmaline said:

@tuanphanHi, would you be able to update this code for me so it doesn't have a black bar on the side? My website is this. Thanks. https://www.emmalinecarter.com/

I don't see black bar. Can you take a screenshot?