Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.5)
// Compass (v1.0.1)
// Susy (v2.1.3)
// ----

@import "compass";
@import "susy";

@mixin render(
  $css
) {
  @each $key, $value in $css {
    @if type-of($value) == map {
      // Recursive...
      #{$key} { @include render($value); }
    } @else if $key == 'extend' {
      @extend #{$value};
    } @else {
      #{$key}: $value;
    }
  }
}

.line-height {
  line-height:16px;
}

$header-styles : (
  header:(color:red, float:left, 
  nav:(
    color: blue,
    float:left, 
    "&:hover":(color:red)
    ),
  "&:hover":(color: green),
  "extend":".line-height",
));


@include render($header-styles);

SassMeister-output.css

.line-height, header {
  line-height: 16px;
}

header {
  color: red;
  float: left;
}
header nav {
  color: blue;
  float: left;
}
header nav:hover {
  color: red;
}
header:hover {
  color: green;
}