.comment-list {
  &:extend(.list-unstyled all);
}
.comment-list ol {
  list-style: none;
}
.comment-form p {
  &:extend(.form-group all);
}
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  &:extend(.form-control all);
}
.comment-form input[type="submit"] {
  &:extend(.btn all);
  &:extend(.btn-primary all);
}