How can I change the main CSS codes?

[ogulcan1787]

Hi, I made many CSS changes by adding CSS codes to the theme settings.
Do these codes slow down the website?
Can I change these codes directly from within the main theme?
Thank you in advance for your help.

[merefield (Robert)]

You are best to start here:

Developing Discourse Themes & Theme Components

Discourse Themes and Theme Components can be used to customize the look, feel and functionality of Discourse’s frontend. This section of the developer guides aims to provide all the reference materials you need to develop simple themes for a single site, right up to complex open-source theme components. This introduction aims to provide a map of all the tools and APIs for theme development. If you prefer a step-by-step tutorial for theme development, jump straight to: Themes vs. Theme Compon…

and it will not slow your site down.

[Lilly (Lillian)]

I have posted CSS help to you many times. please read the links that people provide you for information.

Search section like on Reddit?

If you are trying to learn to customize your forum, please take some time to learn some basics of themes, components and CSS. Alternatively, you can always post in Marketplace for paid help to customize your forum.