My attempt to add a border to content on my WordPress site has been unsuccessful. Since I don't know how to add a CSS file, I've been trying to achieve this using what I believe to be HTML. My coding skills are limited to what I learned in high school.
Here is the content I want to border with a simple black border of 1 or 2 pixels:
<iframe src="https://link_to_my_file/file.pdf" style="width:1000px; height:300px;" frameborder="1"></iframe>
Unfortunately, my initial approach did not work. So, I attempted the following:
<iframe src="https://link_to_my_file/file.pdf" style="width:1000px; height:300px;" frameborder="1"></iframe> <style> iframe.solid {border-style:solid} </style>
Despite this effort, the border still did not show up.
How can I properly implement the border without having to use a separate CSS file?