Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.9)
// Compass (v1.0.1)
// ----

// Primary
$dark-orange: #d9531e;
$orange: #f47b20;
$orange-med: #d9531e;

// Tertiary
$orange-dark: #bb471a;

// Original:
a {
  &.btn {
    &:active, &:link, &:visited {
  	display:block;
  	text-align:center;
  	background-color:$orange;
  	padding:0.5em;
  	margin:1em auto;
  	width:40%;
  	color:#fff;
  	font-weight:400;
  	text-transform:uppercase;
  	text-decoration:none;
  	&:hover, &:focus {background-color:$orange-dark;}
  	}
	}
}

// Improved Specificity:
.btn  {
	display:block;
	text-align:center;
	background-color:$orange;
	padding:0.5em;
	margin:1em auto;
	width:40%;
	font-weight:400;
	text-transform:uppercase;
	text-decoration:none;
      color:#fff;
      &:visited, &:link { color:#fff; }
	&:hover, &:focus {background-color:$orange-dark;}
}

SassMeister-output.css

a.btn:active, a.btn:link, a.btn:visited {
  display: block;
  text-align: center;
  background-color: #f47b20;
  padding: 0.5em;
  margin: 1em auto;
  width: 40%;
  color: #fff;
  font-weight: 400;
  text-transform: uppercase;
  text-decoration: none;
}
a.btn:active:hover, a.btn:active:focus, a.btn:link:hover, a.btn:link:focus, a.btn:visited:hover, a.btn:visited:focus {
  background-color: #bb471a;
}

.btn {
  display: block;
  text-align: center;
  background-color: #f47b20;
  padding: 0.5em;
  margin: 1em auto;
  width: 40%;
  font-weight: 400;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
}
.btn:visited, .btn:link {
  color: #fff;
}
.btn:hover, .btn:focus {
  background-color: #bb471a;
}