# Air Theme

**URL:** <https://meta.discourse.org/t/air-theme/197703>\
**Category:** Theme\
**Tags:** air-theme\
**Created:** [July 20, 2021, 8:24pm UTC](https://meta.discourse.org/t/air-theme/197703 "2021-07-20T20:24:30Z")\
**Posts on this page:** 1\
**Showing post:** 579

<div class="post-metadata">

**Author:** ![Heliosurge](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/heliosurge/32/571810_2.png) [@Heliosurge](https://meta.discourse.org/u/Heliosurge)\
**Post date:** [May 27, 2025, 9:57pm UTC](https://meta.discourse.org/t/air-theme/197703/579 "2025-05-27T21:57:42Z")

</div>

This line in mobile CSS might be related. On GitHub this line reads

```plaintext
.navigation-categories .navigation-container,
.categories-list .navigation-container {
  border-bottom: 0 !important;
}

```

As mentioned I copied the air theme CSS to make a custom theme. This is the original code for that line note the missing “px”

```plaintext
.navigation-categories .navigation-container,
.categories-list .navigation-container {
  border-bottom: 0px !important;
}

```

~~Haven’t tested. But create a custom component and paste the above code in Mobile CSS. Save and enable component on air theme.~~

**Unfortunately just tested and it did not fix issue. The px must be default if not specified.**

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_[View the full topic](https://meta.discourse.org/t/air-theme/197703)._