<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <div class="header">I am a header</div>
  <div class="text">I am a text</div>
  <div class="footer">I am a footer</div>
</body>
</html>
$color: lightcoral;
$color-second: blue;
$font-lg: 2em;
$font-sm: 1em;

@mixin headingStyles {
  background-color: $color;
  text-align: center;
}

@mixin headingFont($size: 3em) {
  color: $color-second;
  font-size: $size * 2;
}

@mixin myTransition($params...) {
  transition: $params;
}

.header {
  @include headingStyles;
  @include headingFont($font-lg);
}

.footer {
    @include headingStyles;
    @include headingFont($font-sm);
}

.text {
    @include headingFont();
    @include myTransition(color .5s, background-color 1s);
  
     &:hover {
      color: $color;
      background-color: $color-second;  
  }
}
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