.button {
  transition: background-color 0.23s ease-in-out 0s;
  font-weight: 600;
  font-family: "Open Sans", "Helvetica Neue", Arial, Helvetica, Verdana, sans-serif;
  text-align: center;
  vertical-align: middle;
  text-transform: capitalize;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  padding: 0 18px;
  cursor: pointer;
  margin-right: 18px;
  border: 0 none;
  border-radius: 3px;
  display: inline-block;
  font-size: 13px;
  height: 32px;
  line-height: 32px
}

.default {
  @extend .button;
}

.button {
  transition: background-color 0.23s ease-in-out 0s;
  font-weight: 600;
  font-family: "Open Sans", "Helvetica Neue", Arial, Helvetica, Verdana, sans-serif;
  text-align: center;
  vertical-align: middle;
  text-transform: capitalize;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  padding: 0 18px;
  cursor: pointer;
  margin-right: 18px;
  border: 0 none;
  border-radius: 3px;
  display: inline-block;
  font-size: 13px;
  height: 32px;
  line-height: 32px
}

.default {
  composes: button;
}

Change css inherited keyword scss:@extends -> css-modules:compose
Change css inherited keyword scss:@extends -> css-modules:compose
