CSS Causing All H3 Tags to Center

In the main.css file line 53, all H3 tags are aligned to center. This causes all h3 tags on the website to center. This should be set to something more explicit to avoid conflicts.

.wp_head_example,
.google_docs,
.google_sheet,
.native_style,
.power_point_viewer,
.only_excel,
.word_style,
.g_slides_styles,
h3 {
text-align: center;
}