Don't Care A Button skin by AO3 

takes off button styling to leave plain text
Role:
user
Media:
screen
Condition:
Normal

CSS

.actions a,
.actions a:visited,
.action,
input[type="submit"],
button,
.current,
.actions label {
  background: none;
  border: 0;
  padding: 0.25em;
  border-radius: 0;
  box-shadow: none;
}

#outer .actions a:hover,
.actions input[type="submit"]:hover {
  border: 0;
  text-decoration: underline;
  color: #999;
  box-shadow: none;
}