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CSS Advanced Sass Advanced Variables, Mixins, Functions, and Placeholders Better Variables with List-maps

[solved] Better variables with List-maps quiz help

So, I'm attempting to answer this question

Write out all the values from the following list-map to an >input[disabled] selector.

I've come up with this so far. And am now at a loss as to what I am missing.

I'm getting the following error. Bummer! In a CSS rule for the input[disabled] selector, for the value of the background-color property, you need to get the disabled-background value from the $input map.

But I can't seem to find what I'm missing on the call to the $input map. Any help would be very appreciated. Code posted below

$input-disabled-color: #000000;

$input: (
  disabled-background: lighten($input-disabled-color, 75%),
  disabled-border: lighten($input-disabled-color, 50%),
  disabled-text: lighten($input-disabled-color, 50%)
);


input[disabled]{
  disabled-background: map-get($input, disabled-background);
  disabled-border: map-get($input, disabled-border);
  disabled-text: map-get($input, disabled-text);
}

I found out my problem.

  background-color: map-get($input, disabled-background);
  border-color: map-get($input, disabled-border);
  color: map-get($input, disabled-text);

I needed to set the background:color/border/color. I wasn't calling a CSS selector at all. Guess I need to stop losing sight of the forrest for the trees.