Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

.c-button,
%c-button {
    color: red;
}

.c-callout {
    @extend %c-button; // At first glance, this might not look dangerous
    color: blue;
}

.t-home .cta .c-button { // seems pretty innocent still, right?
    color: green;
}

.t-pdp .cta .c-button {
  @extend %c-button
}

.t-about .form [type="submit"] {
  @extend %c-button
}

.t-checkout .form .payment .field .row button {
  @extend %c-button
}

SassMeister-output.css

.c-button,
.c-callout,
.t-pdp .cta .c-button,
.t-about .form [type="submit"],
.t-checkout .form .payment .field .row button {
  color: red;
}

.c-callout {
  color: blue;
}

.t-home .cta .c-button {
  color: green;
}