.Button {
  transition: background-color 0.2s;
  display: inline-block;
  padding: 0.6em 1em;
  background: hsla(31, 15%, 50%, 0.15);
  color: inherit;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.8125em;
  font-weight: 300;
  line-height: normal;
  text-decoration: none;
  white-space: nowrap;
}
.Button:focus {
  outline: thin dotted #666;
  text-decoration:none;
}
.Button:active,
.Button:focus
.Button:hover {
  border: 0;
  background: hsla(31, 15%, 50%, 0.25);
  text-decoration:none;
}

.Button--action {
  background-color: hsl(150, 45%, 50%);
  color: #fff;
}
.Button--action:active,
.Button--action:focus,
.Button--action:hover {
  background-color: hsl(150, 45%, 40%);
}

.Button--wide {
  padding-right: 1.5em;
  padding-left: 1.5em;
}

.Button {
  transition: background-color 0.2s;
  display: inline-block;
  padding: 0.6em 1em;
  background: hsla(31, 15%, 50%, 0.15);
  color: inherit;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.8125em;
  font-weight: 300;
  line-height: normal;
  text-decoration: none;
  white-space: nowrap;
}
.Button:focus {
  outline: thin dotted #666;
  text-decoration:none;
}
.Button:active,
.Button:focus,
.Button:hover {
  border: 0;
  background: hsla(31, 15%, 50%, 0.25);
  text-decoration:none;
}

.Button--action {
  background-color: hsl(150, 45%, 50%);
  color: #fff;
}
.Button--action:active,
.Button--action:focus,
.Button--action:hover {
  background-color: hsl(150, 45%, 40%);
}

.Button--wide {
  padding-right: 1.5em;
  padding-left: 1.5em;
}

Add a missing comma to a selector.
Add a missing comma to a selector.
