Bold Font is working for everything EXCEPT for H1 / H2 / H3 [closed]

I can bold "a" and "p" but not H1 or H in general.

Here is my code and a picture of how it looks

<link rel="stylesheet" href="style.css">
<style>
    .bold {
    font-weight: bold;
</style>

<div style="text-align:center" class="nice bold">
  <h1 class="green">InsertName</h1>
  <p>Options:</p>
  <a class="special" href="#abs">|About Us|</a>
  <a class="special" href="#test">|Test Page|</a>
  <a class="special" href="#shop">|Shopping List|</a>
  <a class="special" href="#html">|How to HTML|</a>
  <a class="special" href="#homework">|Homework|</a>
  <a class="special" href="#fonts">|Fontblog|</a>
  <a class="special" href="#colortest">|Colors|</a>
</div>

This is in the "style.css" file:

        .nice {
            font-family: 'Titillium Web', sans-serif;
        }
        .link }```

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