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HTML 

              
                %section 
  .container.hero-container
    %header
      %h2 Sass mixin to create linear stepped gradients
    %article
      %pre 
        %code @include strips(<strong>color</strong>, <strong>rotation</strong>);
      %p - <strong>color</strong> can be a color name, an hexadecimal, a rgb(a) color, hsl .. 
      %p - <strong>rotation</strong> is the rotation degree, ex : 45deg
    %a{href: "https://gist.github.com/LukyVj/4dbcbc9b60b9b79703c0",class:"btn blue", target: "_blank"} Gist 
%section
  .container
    %a.btn{:href => "#", class: "blue"}Booya
    %a.btn{:href => "#", class: "red"}Booya
    %a.btn{:href => "#", class: "green"}Booya
    %a.btn{:href => "#", class: "purple"}Booya
  .container
    %a.btn{:href => "#", class: "orange"}Booya
    %a.btn{:href => "#", class: "lime"}Booya
    %a.btn{:href => "#", class: "white"}Booya
    %a.btn{:href => "#", class: "pink"}Booya

%section
  .container
    %a.btn{:href => "#", class: "blue"}Booya
    %a.btn{:href => "#", class: "red"}Booya
    %a.btn{:href => "#", class: "green"}Booya
    %a.btn{:href => "#", class: "purple"}Booya
  .container
    %a.btn{:href => "#", class: "orange"}Booya
    %a.btn{:href => "#", class: "lime"}Booya
    %a.btn{:href => "#", class: "white"}Booya
    %a.btn{:href => "#", class: "pink"}Booya
    
%section
  .container
    %header.center
      %h2 Fancier?

////////////// GLOSSY    
%section
  .container
    %pre
      %code .glossy
  .container
    %a.btn{:href => "#", class: "blue glossy"}Booya
    %a.btn{:href => "#", class: "red glossy"}Booya
    %a.btn{:href => "#", class: "green glossy"}Booya
    %a.btn{:href => "#", class: "purple glossy"}Booya
  .container
    %a.btn{:href => "#", class: "orange glossy"}Booya
    %a.btn{:href => "#", class: "lime glossy"}Booya
    %a.btn{:href => "#", class: "white glossy"}Booya
    %a.btn{:href => "#", class: "pink glossy"}Booya

%section
  .container
    %pre
      %code .glossy
  .container
    %a.btn{:href => "#", class: "blue glossy"}Booya
    %a.btn{:href => "#", class: "red glossy"}Booya
    %a.btn{:href => "#", class: "green glossy"}Booya
    %a.btn{:href => "#", class: "purple glossy"}Booya
  .container
    %a.btn{:href => "#", class: "orange glossy"}Booya
    %a.btn{:href => "#", class: "lime glossy"}Booya
    %a.btn{:href => "#", class: "white glossy"}Booya
    %a.btn{:href => "#", class: "pink glossy"}Booya

////////////// NOISY
%section
  .container
    %pre
      %code .noisy
  .container
    %a.btn{:href => "#", class: "blue noisy"}Booya
    %a.btn{:href => "#", class: "red noisy"}Booya
    %a.btn{:href => "#", class: "green noisy"}Booya
    %a.btn{:href => "#", class: "purple noisy"}Booya
  .container
    %a.btn{:href => "#", class: "orange noisy"}Booya
    %a.btn{:href => "#", class: "lime noisy"}Booya
    %a.btn{:href => "#", class: "white noisy"}Booya
    %a.btn{:href => "#", class: "pink noisy"}Booya

%section
  .container
    %pre
      %code .noisy
  .container
    %a.btn{:href => "#", class: "blue noisy"}Booya
    %a.btn{:href => "#", class: "red noisy"}Booya
    %a.btn{:href => "#", class: "green noisy"}Booya
    %a.btn{:href => "#", class: "purple noisy"}Booya
  .container
    %a.btn{:href => "#", class: "orange noisy"}Booya
    %a.btn{:href => "#", class: "lime noisy"}Booya
    %a.btn{:href => "#", class: "white noisy"}Booya
    %a.btn{:href => "#", class: "pink noisy"}Booya

////////////// BenDay
%section
  .container
    %pre
      %code .benday
  .container
    %a.btn{:href => "#", class: "blue benday"}Booya
    %a.btn{:href => "#", class: "red benday"}Booya
    %a.btn{:href => "#", class: "green benday"}Booya
    %a.btn{:href => "#", class: "purple benday"}Booya
  .container
    %a.btn{:href => "#", class: "orange benday"}Booya
    %a.btn{:href => "#", class: "lime benday"}Booya
    %a.btn{:href => "#", class: "white benday"}Booya
    %a.btn{:href => "#", class: "pink benday"}Booya

%section
  .container
    %pre
      %code .benday
  .container
    %a.btn{:href => "#", class: "blue benday"}Booya
    %a.btn{:href => "#", class: "red benday"}Booya
    %a.btn{:href => "#", class: "green benday"}Booya
    %a.btn{:href => "#", class: "purple benday"}Booya
  .container
    %a.btn{:href => "#", class: "orange benday"}Booya
    %a.btn{:href => "#", class: "lime benday"}Booya
    %a.btn{:href => "#", class: "white benday"}Booya
    %a.btn{:href => "#", class: "pink benday"}Booya
%footer
  %p Brought to you by <a href="https://twitter.com/LukyVj">@LukyVj</a>, inspired by <a href="https://dribbble.com/shots/2565545-Sign-up" target="_blank">This Dribbble shot</a>
!

CSS 

              
                $primary-color: #56C3FF;
$btn-width: 180px;
$colors: (
  (blue, #56C3FF, 85deg),
  (red, #CE383C, 75deg),
  (green, #98BB3A, 65deg),
  (purple, #B093C4, 55deg),
  (orange, #EB922A, 45deg),
  (lime, #A9D063, 35deg),
  (white, #eeeeee, 25deg),
  (pink, #E84A87, 15deg)
  );

// Background mixin 
@mixin strips($color, $angle){
  $color: saturate(lighten($color, 2%), 10%);
  background: $color 
  linear-gradient($angle, $color 0%, $color 10%,
  mix(black, $color, 5%) 10%, mix(black, $color, 5%) 20%,
  mix(black, $color, 12%) 19%, mix(black, $color, 10%) 21%, // Thin line between gradient
  mix(black, $color, 10%) 20%,mix(black, $color, 10%) 30%,
  mix(black, $color, 17%) 29%, mix(black, $color, 15%) 31%, // Thin line between gradient      
  mix(black, $color, 15%) 30%,mix(black, $color, 15%) 40%,
  mix(black, $color, 22%) 39%, mix(black, $color, 20%) 41%, // Thin line between gradient          
  mix(black, $color, 20%) 40%,mix(black, $color, 20%) 50%,
  mix(black, $color, 27%) 49%, mix(black, $color, 25%) 51%, // Thin line between gradient          
  mix(black, $color, 25%) 50%,mix(black, $color, 25%) 60%,
  mix(black, $color, 32%) 59%, mix(black, $color, 30%) 61%, // Thin line between gradient           
  mix(black, $color, 30%) 60%,mix(black, $color, 30%) 70%,
  mix(black, $color, 37%) 69%, mix(black, $color, 35%) 71%, // Thin line between gradient           
  mix(black, $color, 35%) 70%,mix(black, $color, 35%) 80%,
  mix(black, $color, 42%) 79%, mix(black, $color, 40%) 81%, // Thin line between gradient           
  mix(black, $color, 40%) 80%,mix(black, $color, 40%) 90%,
  mix(black, $color, 47%) 89%, mix(black, $color, 45%) 91%, // Thin line between gradient           
  mix(black, $color, 45%) 90%,mix(black, $color, 45%) 100%);

  &.glossy { 
    position: relative;
    overflow: hidden;
    
    &:after {
      content: '';
      display: block;
      width: 80%;
      height: 35%;
      background: linear-gradient(to bottom , rgba(white, 0.6), rgba(black, 1));
      box-shadow: inset 0 5px 6px rgba(white, 0.6); 
      border-radius: 100%;
      mix-blend-mode: screen;
      position: absolute;
      top: -4px;
      left: 0;
      right: 0;
      margin: auto;
    }
    &:before {
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      box-shadow: inset 0 -6px 30px rgba(black, 0.4);
    }
  }
  
  &.noisy { 
    position: relative;
    overflow: hidden;
    
    &:before,
    &:after{
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      background: url('data:image/png;base64,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 nO3Wp/3fEV5a+4wz//6qy8JxjZsmxxy5+4w9CDNJY09T072iKG0EnOS0arEYgXqYnXcYHwjTtUNAcMelOd4xpkoqiTYICWFq0JSiPfPDQdnt+4/wuqcXY47QILbgAAAABJRU5ErkJggg==');
      mix-blend-mode: screen;
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      margin: auto;
      background-size: 30%;
      background-position: center center;
    }
    &:before {
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      position: absolute;
      background-size: 80%;
      left: 0;
      top: 0;
      z-index: 0;
      mix-blend-mode: color-burn;
      background-position: center bottom;
    }
  }
  
  &.benday { 
    position: relative;
    overflow: hidden;
    
    &:before,
    &:after{
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      background: linear-gradient(to bottom, rgba(#fff, 0.0001) 10%, rgba(#fff, 0.1)),
        repeating-radial-gradient(center center, rgba(255,255,255,0.1), rgba(255,255,255,0.1) 1px, transparent 2px, transparent 100%);

      mix-blend-mode: lighten;
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      margin: auto;
      background-size: cover,
                      4px 4px;
      background-position: center center;
    }
    &:before {
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      z-index: 0;
      mix-blend-mode: lighten;
    }
  }
}
// Personal reset and settings
// Not important 
:root{
  font-size: 16px;
}
*{
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased; 
  -moz-osx-font-smoothing: grayscaled;
}
html, body {
  width: 100%;
  height: 100%;
  float: left;
  padding: 0;
  margin: 0;
}

body {
  background: #ECEBF2;
  font-family: "Raleway", Helvetica new, helvetica, sans-serif;
}
// Helper
.center {
  text-align: center;
  line-height: 4;
  text-transform: uppercase;
  letter-spacing: 6px;
  font-size: 1.5em;
}
// Sections styles
section {
  width: 100vw;
  min-height: 400px;
  height: 50vh;
  position: relative;
  background: #dedede;
  float: left;

  &:nth-child(1) {
    background-blend-mode: darken;
  }

  &:nth-child(odd) {
    color: mix(#2A2734, #fff, 85%);
  }

  &:nth-child(even) {
    background: mix(#2A2734, #fff, 85%);
    color: #dedede;
  }

  .container {
    max-width: calc((#{$btn-width} * 4) + 64px);
    height: auto;
    position: relative;
    top: 15vh;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;

    &.hero-container{
      @media (max-width: 780px) {
        padding: 16px;
      }
      
      h2 {
        border-bottom: 3px solid;
        display: inline-block;
        padding-bottom: 0.35em;
        margin-bottom: 0.5em;
      }
      .btn {
        @include strips(#86C5DB, 60deg);
        border-radius: 6px;
        padding: 8px 16px;
        margin: 0;
        line-height: 20px;
        height: auto;
        font-size: 16px;
        position: relative;
        float: right;
      }
    }
  }
}
// The button starts here
.btn {
  display: block;
  padding: 0 1.5em;
  height: 80px;
  max-width: 180px;
  text-align: center;
  max-height: 80px;
  line-height: 80px;
  border-radius: 100px;
  color: #fff;
  font-size: 1.5em;
  text-decoration: none;
  text-align: center;
  display: block;
  float: left;
  margin: 8px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 4px;
  will-change: box-shadow;
  transition: box-shadow 0.4s ease;

// The background starts here 
// By looking the code below, you can 
// see how simple it is, also using a
// mix() Sass function is better
// to create colors gradient, it's more
// precise and accurate than a darken()/lighten() 
// function. 
// see : https://codepen.io/KatieK2/pen/tejhz/    

@each $c , $v, $d in $colors {
  &.#{$c} {
    @include strips($v, $d);
    border-bottom: 1px solid rgba($v, 0.2);
    box-shadow: 0 1px 1px rgba($v, 0.4);

    &:hover {
      box-shadow: 0 4px 10px rgba($v, 0.6);
      section:nth-child(even) &{
        box-shadow: 0 4px 15px rgba($v, 0.25), 0 4px 10px rgba(#000, 0.35);
      }
    }
  }
}    

// All about centering
section & {
  &:nth-child(5) {
    clear: left;
  }
}
}


footer {
  height: auto;
  position: relative;
  background: #dedede;
  float: left;
  min-height: 10vh;
  width: 100%;
  text-align: center;
  font-weight: 400;
  line-height: 10vh;
  color: #4A4752;
  
  a {
    color: #4A4752;
    text-decoration: none;
    border-bottom: 1px solid #4A4752;
    
  }
}
!

JS 

              
                // Inspired by this Dribbble shot from Alexandre Naud <@alexnnd>
// https://dribbble.com/shots/2565545-Sign-up
!
999px

Console