$light-grey: #ddd;

$dark-grey: rgba(0,0,0,0.64);

$red: #E04E4B;

$lightest-border: #f0f0f0;
$lighter-border: #eee;
$light-border: $light-grey;

$alignment-text: rgba(95, 155, 101, 1);

$hmargin: 10px;
$vmargin: 15px;

$border: 1px solid $light-border;

$post-width: 640px;

@mixin flex-center{
  display: flex;
  align-items: center;
}

$light-grey: #ddd;

$dark-grey: rgba(0,0,0,0.64);

$red: #E04E4B;

$lightest-border: #f0f0f0;
$lighter-border: #eee;
$light-border: $light-grey;

$alignment-text: rgba(95, 155, 101, 1);

$hmargin: 10px;
$vmargin: 15px;

$border: 1px solid $light-border;

@mixin flex-center{
  display: flex;
  align-items: center;
}

Remove unused SCSS variable: post-width
Remove unused SCSS variable: post-width
