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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <button id="background-toggle" class="toggle">Toggle<br />Bkg.</button>

<h1>Working with a component</h1>


<hr />


<h2>Action row component</h2>

<div class="action-row">
  <button class="button button--primary button--medium button--solid">Upload file</button>
  <button class="button button--tertiary button--medium button--hollow">Cancel</button>
</div>
            
          
!
            
              ///////////////////////////////
// ELEMENT LOGIC             //
// Element starts on line 53 //
///////////////////////////////

// Breakpoints:
$bp-lap: 37.5em;  // 600px @ 16px

// Background variables
$background-light: #fefbef;
$background-dark: #403f3c;

// Color variables
$type-light: $background-light;
$type-dark: $background-dark;
$button-color-primary-light: #ff4136;
$button-color-secondary-light: #357edd;
$button-color-tertiary-light: #808080;
$button-color-primary-dark: #ff6347;
$button-color-secondary-dark: #1e90ff;
$button-color-tertiary-dark: #939393;

// Transform variables
$button-bounce: scale(0.98);

// Transition variables
$button-transition-duration: 300ms;
$button-cycle-busy: 2s ease-in-out infinite;

// Border variables
$button-border-width-thin: 2px;
$button-border-width-thick: 3px;

// Animation
@keyframes button-busy {
  0% { opacity: 0.2; }
  50% { opacity: 0.4; }
  100% { opacity: 0.2; }
}








/////////////////////
// ELEMENT STYLING //
/////////////////////

// Declared as a class so we can easily apply it to both `<button>` and `<input type="button">`
.button {

  /////////////////////
  // CORE FORMATTING //
  /////////////////////
  background-color: transparent;
  border: 0;
  color: $type-light;
  font-family: 'Open Sans', sans-serif;
  font-weight: 600;
  line-height: 1;
  margin-top: 1.5rem;
  transition:
   background-color $button-transition-duration, // Solid buttons
   border-color $button-transition-duration, // Hollow buttons
   box-shadow ($button-transition-duration / 2); // Focused buttons
  width: 100%; // Large, mobile-friendly touch target

  // States
  // All states share these core properties
  &:focus {
    outline: none; // Make sure every priority has a visually distinct focus style!
  }

  // Make buttons feel "tappy"
  &:active {
    transform: $button-bounce;
    transition: none;
  }

  // Disabled styles use the`!important` qualifier because they are a "fixed" trump state that should not be manipulated until the reason for disabling the element has been satisfied: https://csswizardry.com/2016/05/the-importance-of-important/
  &[aria-busy="true"] {
    animation: button-busy $button-cycle-busy !important;
    cursor: not-allowed !important;
    pointer-events: none !important;

    &:focus {
      box-shadow: none !important;
    }

    &:active {
      transform: none !important;
    }
  }

  &[disabled] {
    cursor: not-allowed !important;
    opacity: 0.3 !important;
    pointer-events: none !important;
  }

  // Contexts
  // All contexts share these core properties
  .background--dark & {
    color: $type-dark;
  }

  // Media Queries
  @media (min-width: $bp-lap) {
    width: auto; // Smaller buttons on larger screens
    padding-left: 2rem;
    padding-right: 2rem;
    margin-left: 1rem;
    margin-right: 1rem;
  }

  ////////////////
  // PRIORITIES //
  ////////////////
  // Primary buttons
  // `#{&}` interpolates the ampersand selector, letting you target multiple classes on the same element: https://webdesign.tutsplus.com/tutorials/all-you-ever-need-to-know-about-sass-interpolation--cms-21375  
  &--primary#{&}--solid,
  &--primary#{&}--hollow {

    // States
    &:focus {
      box-shadow:
       0 0 0 $button-border-width-thick $background-light,
       0 0 0 ($button-border-width-thin * 2.5) $button-color-primary-light;
    }

    // Contexts
    .background--dark & {
      &:focus {
        box-shadow:
         0 0 0 $button-border-width-thick $background-dark,
         0 0 0 ($button-border-width-thin * 2.5) $button-color-primary-light;
      }
    }
  }

  &--primary#{&}--solid {
    background-color: $button-color-primary-light;

    // States
    &:hover {
      background-color: lighten($button-color-primary-light, 7%);
    }

    &:active {
      background-color: darken($button-color-primary-light, 7%);
    }

    &[disabled] {
      &:hover {
        background-color: $button-color-primary-light !important;
      }
    }
  }

  &--primary#{&}--hollow {
    color: $button-color-primary-light;
    border: $button-border-width-thick solid $button-color-primary-light;

    // States
    &:hover {
      border-color: lighten($button-color-primary-light, 7%);
      color: lighten($button-color-primary-light, 7%);
    }

    &:active {
      border-color: darken($button-color-primary-light, 7%);
      color: darken($button-color-primary-light, 7%);
    }

    &[disabled] {
      &:hover {
        color: $button-color-primary-light;
        border: $button-border-width-thick solid $button-color-primary-light;
      }
    }
  }

  // Secondary buttons
  &--secondary#{&}--solid,
  &--secondary#{&}--hollow {

    // States
    &:focus {
      box-shadow:
       0 0 0 $button-border-width-thick $background-light,
       0 0 0 ($button-border-width-thin * 2.5) $button-color-secondary-light;
    }

    // Contexts
    .background--dark & {
      &:focus {
        box-shadow:
         0 0 0 $button-border-width-thick $background-dark,
         0 0 0 ($button-border-width-thin * 2.5) $button-color-secondary-light;
      }
    }
  }

  &--secondary#{&}--solid {
    background-color: $button-color-secondary-light;

    // States
    &:hover {
      background-color: lighten($button-color-secondary-light, 7%);
    }

    &:active {
      background-color: darken($button-color-secondary-light, 7%);
    }

    &[disabled] {
      &:hover {
        background-color: $button-color-secondary-light !important;
      }
    }

    // Contexts
    .background--dark & {
      background-color: $button-color-secondary-dark;

      // States
      &:hover {
        background-color: lighten($button-color-secondary-dark, 7%);
      }

      &:active {
        background-color: darken($button-color-secondary-dark, 7%);
      }

      &[disabled] {
        &:hover {
          background-color: $button-color-secondary-light !important;
          opacity: 0.2 !important;
        }
      }
    }
  }

  &--secondary#{&}--hollow {
    color: $button-color-secondary-light;
    border: $button-border-width-thick solid $button-color-secondary-light;

    // States
    &:hover {
      border-color: lighten($button-color-secondary-light, 7%);
      color: lighten($button-color-secondary-light, 7%);
    }

    &:active {
      border-color: darken($button-color-secondary-light, 7%);
      color: darken($button-color-secondary-light, 7%);
    }

    &[disabled] {
      &:hover {
        color: $button-color-secondary-light;
        border: $button-border-width-thick solid $button-color-secondary-light;
      }
    }

    // Contexts
    .background--dark & {
      color: $button-color-secondary-dark;
      border: $button-border-width-thick solid $button-color-secondary-dark;

      // States
      &:hover {
        border-color: lighten($button-color-secondary-light, 14%);
        color: lighten($button-color-secondary-light, 14%);
      }

      &:active {
        border-color: darken($button-color-secondary-light, 14%);
        color: darken($button-color-secondary-light, 14%);
      }

      &[disabled] {
        &:hover {
          color: $button-color-secondary-dark;
          border: $button-border-width-thick solid $button-color-secondary-dark;
        }
      }
    }
  }

  // Tertiary buttons
  &--tertiary#{&}--solid,
  &--tertiary#{&}--hollow {

    // States
    &:focus {
      box-shadow:
       0 0 0 $button-border-width-thick $background-light,
       0 0 0 ($button-border-width-thin * 2.5) $button-color-tertiary-light;
    }

    // Contexts
    .background--dark & {
      &:focus {
        box-shadow:
         0 0 0 $button-border-width-thick $background-dark,
         0 0 0 ($button-border-width-thin * 2.5) $button-color-tertiary-light;
      }
    }
  }

  &--tertiary#{&}--solid {
    background-color: $button-color-tertiary-light;

    // States
    &:hover {
      background-color: lighten($button-color-tertiary-light, 7%);
    }

    &:active {
      background-color: darken($button-color-tertiary-light, 7%);
    }

    &[disabled] {
      &:hover {
        background-color: $button-color-tertiary-light !important;
      }
    }

    // Contexts
    .background--dark & {
      background-color: $button-color-tertiary-dark;

      // States
      &:hover {
        background-color: lighten($button-color-tertiary-dark, 7%);
      }

      &:active {
        background-color: darken($button-color-tertiary-dark, 7%);
      }

      &[disabled] {
        &:hover {
          background-color: $button-color-tertiary-dark !important;
        }
      }
    }
  }

  &--tertiary#{&}--hollow {
    color: $button-color-tertiary-light;
    border: $button-border-width-thick solid $button-color-tertiary-light;

    // States
    &:hover {
      border-color: lighten($button-color-tertiary-light, 7%);
      color: lighten($button-color-tertiary-light, 7%);
    }

    &:active {
      border-color: darken($button-color-tertiary-light, 7%);
      color: darken($button-color-tertiary-light, 7%);
      transform: $button-bounce;
      transition: none;
    }

    &[disabled] {
      &:hover {
        color: $button-color-tertiary-light;
        border: $button-border-width-thick solid $button-color-tertiary-light;
      }
    }

    // Contexts
    .background--dark & {
      color: $button-color-tertiary-dark;
      border: $button-border-width-thick solid $button-color-tertiary-dark;

      // States
      &:hover {
        border-color: lighten($button-color-tertiary-light, 21%);
        color: lighten($button-color-tertiary-light, 21%);
      }

      &:active {
        border-color: darken($button-color-tertiary-light, 21%);
        color: darken($button-color-tertiary-light, 21%);
      }

      &[disabled] {
        &:hover {
          color: $button-color-tertiary-dark;
          border: $button-border-width-thick solid $button-color-tertiary-dark;
        }
      }
    }
  }

  ///////////
  // SIZES //
  ///////////
  &--small {
    min-width: 6rem;
    border-radius: 0.5rem;
    font-size: 0.8em;
    min-height: 2rem;
  }

  &--small#{&}--hollow {
    border-width: $button-border-width-thin;

    // Contexts
    .background--dark & {
      border-width: $button-border-width-thin;
    }
  }

  &--small#{&}--icon {
    [class^="icon-"] {
      height: 0.8rem;
      margin-right: 0.2rem;
      position: relative;
       top: 0.125rem;
      width: 0.8rem;
    }
  }

  &--medium {
    min-width: 8rem;
    border-radius: 0.75rem;
    min-height: 2.5rem;
  }

  &--medium#{&}--icon {
    [class^="icon-"] {
      height: 1rem;
      margin-right: 0.3rem;
      position: relative;
       top: 0.125rem;
      width: 1rem;
    }
  }

  &--large {
    min-width: 10rem;
    border-radius: 0.75rem;
    font-size: 1.2em;
    letter-spacing: 1px;
    min-height: 3rem;
  }

  &--large#{&}--icon {
    [class^="icon-"] {
      height: 1.1rem;
      margin-right: 0.35rem;
      position: relative;
       top: 0.1875rem;
      width: 1.1rem;
    }
  }

  ///////////
  // FILLS //
  ///////////
  &--solid,
  &--hollow {

    // States
    &[disabled] {
      &:active {
        transform: none !important;
      }
    }
  }
}




///////////////////////
// COMPONENT STYLING //
///////////////////////
.action-row {

  // Media Queries
  @media (min-width: $bp-lap) {
    display: flex;
    flex-direction: row-reverse;
  }

  .button {

    // Makes the rightmost button flush with its container. First is last when the direction has been reversed.
    &:first-of-type {
      margin-right: 0;
    }
  }
}








/////////////////////
// PAGE FORMATTING //
/////////////////////
body {
  color: $type-dark;
  padding: 3rem;
  background-color: $background-light;
}

.background {
  transition: background-color $button-transition-duration ease;

  &--light {
    background-color: $background-light;
  }

  &--dark {
    background-color: $background-dark;
  }
}

h1,
h2,
h3 {
  margin: 0;
  padding: 0;

  // Contexts
  .background--dark & {
    color: $type-light;
  }
}

h1 {
  font-size: 1.5em;
  font-weight: 600;
}

h2 {
  font-size: 1em;
  font-weight: 400;
}

h3 {
  font-size: 0.9em;
  font-weight: 400;
  letter-spacing: 1px;
  margin-top: 2.5em;
  text-transform: uppercase;
}

hr {
  border: 1px solid $type-dark;
  margin-top: 2.5rem;

  // Contexts
  .background--dark & {
    border: 1px solid $type-light;
  }
}

// SVG Icons
// This controls the default behavior of how icons look when they're declared via the `<use>` tag
[class^="icon-"],
[class*=" icon-"] {
  display: inline-block;
  width: 1em;
  height: 1em;
  stroke-width: 0;
  stroke: currentColor;
  fill: currentColor;
}

.toggle {
  background-color: $background-dark;
  border: $button-border-width-thin solid $background-light;
  color: $type-light;
  font-size: 0.8em;
  outline: none;
  position: fixed;
   right: 0.625rem;
   top: 0.625rem;
  text-align: center;
  height: 4rem;
  width: 4rem;
  border-radius: 2rem;
  z-index: 100;

  &:hover {
    background-color: darken($background-dark, 10%);
  }

  &:focus {
    box-shadow:
     0 0 0 $button-border-width-thin $background-light,
     0 0 0 ($button-border-width-thick * 1.25) $background-dark;
  }

  &:active {
    background-color: darken($background-dark, 30%);
    transform: $button-bounce;
  }

  // Contexts
  .background--dark & {
    color: $background-dark;
    background-color: $background-light;
    border: $button-border-width-thin solid $background-dark;

    &:hover {
      background-color: desaturate(darken($background-light, 10%), 100%);
    }

    &:focus {
      box-shadow:
       0 0 0 $button-border-width-thin $background-dark,
       0 0 0 ($button-border-width-thick * 1.25) $background-light;
    }

    &:active {
      background-color: desaturate(darken($background-light, 30%), 100%);
      transform: $button-bounce;
    }
  }
}




///////////////
// JERK MODE //
///////////////
a[class*="button"],
div[class*="button"],
p[class*="button"],
span[class*="button"],
button[href],
input[type="button"][href] {

  &:before {
    box-shadow: 0px 3px 5px 0px rgba(0, 0, 0, 0.75);
    color: white;
    content: "Please use the correct button syntax!";
    background-color: fuchsia;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    position: absolute;
     left: 0;
    transform: rotate(-4deg);
  }
}

            
          
!
            
                // Applies the class `.background` to `<body>` when the page loads
$(document).ready(function() {
  $('body').addClass('background');
});

// Toggles the background modifier class
$('#background-toggle').click(function() {
  $('body').toggleClass('background--light background--dark');
});

            
          
!
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