ACF Block Style Reset - SCSS

_admin.scss

body .acf-block-fields,
.edit-post-sidebar {
     font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
     font-size: 13px;
     line-height: 1.4em;

     .acf-field {

          input[type="text"],
          input[type="password"],
          input[type="number"],
          input[type="search"],
          input[type="email"],
          input[type="url"],
          textarea,
          select {
               font-size: 14px;
               line-height: 1.4;
               box-shadow: inset 0 1px 2px rgba(0,0,0,.07);
               transition: 50ms border-color ease-in-out;
               border-radius: 0;
               border: 1px solid #ddd;
               color: #32373c;
          }

          textarea.wp-editor-area {
               box-shadow: none;
               border: none;
          }

          input[type="checkbox"],
          input[type="radio"] {
               border: 1px solid #b4b9be;
               color: #555;
               height: 16px;
               width: 16px;
               border-radius: 0;
          }

          input[type="radio"] {
               border-radius: 50%;
               padding: 1px !important;
          }
     }
}