@media (min-width: 60em){
  body {
  background: tomato;
}
  .heading {
    h1 {
      width:60%;
    }
    > nav.menu {
      width: 50%;
      position: absolute;
      top: 0.6ex;
      right: 5%;
      &.hamburger::before {
        display: none;
      }
      ul.menu {
        display: block;
        float: right;
        margin-top: 4ex;
        li {
          display: inline-block;
          margin-left: 0.7em;
          a {
            text-decoration: none;
          }
        }
      }
    }//nav.menu
  }//.heading
  .container {
    .recipe-list-options {
      input, select {
        width: 20%;
        margin: 3ex 40%;
      }
  input {
    box-sizing: border-box;
    width: 20%;
    margin: 1ex 40% 2ex 40%;
  }
  select {
    box-sizing: border-box;
    width: 18%;
    margin: 3ex 41% 1ex 41%;
  }
    }//nav.recipe-list-options
  }
}

@media (min-width: 60em){

$brewitCurrent: #7ec78a;//bright green
$brewitCurrentText: #000;//black???
$brewitCurrentStep: #4d4d4f;//Thunder
$brewitCurrentOf: #545c56;//Feldgrau
$brewitInactive: #ebeced;//lightgray
$brewitInactiveText:#99999d;//inactive text
$brewitInactiveStep: #abacaf;//Silver Chalice
$brewitInactiveOf: #b1b2b4;//Magnesium

  .heading {
    .logo {
      width:17em;
    }
    > nav.menu {
      width: 80%;
      position: absolute;
      top: 0.6ex;
      right: 5%;
      &.hamburger::before {
        display: none;
      }
      ul.menu {
        display: block;
        float: right;
        margin-top: 4ex;
        li {
          display: inline-block;
          margin-left: 0.7em;
          a {
            text-decoration: none;

          }
        }
      }
    }//nav.menu
  }//.heading
  .container {
    .recipe-list-options {
      input, select {
        width: 20%;
        margin: 3ex 40%;
      }
  input {
    box-sizing: border-box;
    width: 20%;
    margin: 1ex 40% 2ex 40%;
  }
  select {
    box-sizing: border-box;
    width: 18%;
    margin: 3ex 41% 1ex 41%;
  }
    }//nav.recipe-list-options
  }
}

Change width of nav bar, size of logo, and add color variables.
Change width of nav bar, size of logo, and add color variables.
