Hi,

1. The breadcrumb content on your site was managed by the Yoast SEO, please edit it by following the document at this link: https://yoast.com/help/how-to-implement-yoast-seo-breadcrumbs/

2. Please go to Appearance → Customize → Custom CSS then add the following custom CSS code:

.container.penci-breadcrumb {
  max-width: 780px;
}

Regards,
PenciDesign.

Hi,

Please go to Appearance → Customize → Single Posts → General → Single Posts Sidebar Layout: select "No Sidebar" option.

Regards,
PenciDesign.

Hi,

1. Please go to Appearance → Customize → Single Posts → General → Share Box Style: change the share box style at this option field,

2. Navigate to Appearance → Customize → Custom CSS then add the following custom CSS code:

@media only screen and (max-width: 767px) {
  body.single .container.penci_sidebar #main,
  body.single .post,
  body.single .clear-footer{
    margin-bottom: 0;
  }
}

Regards,
PenciDesign.