Hi,

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

@media only screen and (max-width: 479px) {
  #footer-section > .container,
  #widget-area > .container,
  .penci-page-header-wrap .penci-page-header-inner.container,
  .penci-post-image-wrapper > .container,
  .penci-single-smore .container,
  .penci-two-sidebar .container.penci-breadcrumb,
  .wrapper-boxed > .container,
  .wrapper-boxed > .penci-single-wrapper > .penci-single-block > .container {
    padding-left: 0;
    padding-right: 0;
  }
}

Regards,
PenciDesign.