Arif, you can make a custom CSS modification in two ways:
- via Admin Area > Appearance> Edit theme section. Add your custom CSS code to the Edit CSS field. For example this one: form#joinForm input {width:50% !important;}. This code will change the input width on the Join Form.
- by editing base.css file. We are not recommend this because in this case all changes will be overwritten while next update of the software.
After changing the code make sure you've cleared browser and site cache. To clear the site cache enable DEV_MODE. Follow the instructions:
https://docs.oxwall.org/plugin-tuts:enable-debug .