Hide Buttons on Website

I need help to hide buttons on my website.
There are 3 Navbar buttons but the style is damaged.
Wanna hide the button at the middle.

Here you can check the website:
https://github.com/kayner34/Jw

Requirements:
- Experience with website development and design.
- Ability to implement button visibility controls.

Ideal Skills:
- Proficiency in HTML, CSS, and JavaScript.
- Familiarity with popular website builders (e.g., React.js).
- Strong problem-solving skills.