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HTML 

              
                <div class="tabs-wrapper">
	<input type="radio" name="tab" id="tab1" class="tab-head" checked="checked" />
	<label for="tab1">One</label>
	<input type="radio" name="tab" id="tab2" class="tab-head" />
	<label for="tab2">Two</label>
	<input type="radio" name="tab" id="tab3" class="tab-head" />
	<label for="tab3">Three</label>
	<input type="radio" name="tab" id="tab4" class="tab-head" />
	<label for="tab4">Four</label>
	<div class="tab-body-wrapper">
		<div id="tab-body-1" class="tab-body">
			<h1>Tab 1 heading</h1>
			<p>Bacon ipsum dolor sit amet pastrami dolor tri-tip, magna tongue ullamco occaecat velit shoulder sunt elit. Non cillum turkey short loin beef ribs. Anim qui shankle short ribs pancetta boudin. Occaecat mollit in laboris ham hock bresaola corned beef flank hamburger aute chicken id t-bone.</p>
		</div>
		<div id="tab-body-2" class="tab-body">
			<h1>Tab 2 heading</h1>
			<p>Bacon ipsum dolor sit amet pastrami dolor tri-tip, magna tongue ullamco occaecat velit shoulder sunt elit. Non cillum turkey short loin beef ribs. Anim qui shankle short ribs pancetta boudin. Occaecat mollit in laboris ham hock bresaola corned beef flank hamburger aute chicken id t-bone.</p>
		</div>
		<div id="tab-body-3" class="tab-body">
			<h1>Tab 3 heading</h1>
			<p>Bacon ipsum dolor sit amet pastrami dolor tri-tip, magna tongue ullamco occaecat velit shoulder sunt elit. Non cillum turkey short loin beef ribs. Anim qui shankle short ribs pancetta boudin. Occaecat mollit in laboris ham hock bresaola corned beef flank hamburger aute chicken id t-bone.</p>
		</div>
		<div id="tab-body-4" class="tab-body">
			<h1>Tab 4 heading</h1>
			<p>Bacon ipsum dolor sit amet pastrami dolor tri-tip, magna tongue ullamco occaecat velit shoulder sunt elit. Non cillum turkey short loin beef ribs. Anim qui shankle short ribs pancetta boudin. Occaecat mollit in laboris ham hock bresaola corned beef flank hamburger aute chicken id t-bone.</p>
		</div>
	</div>
</div>
!

CSS 

              
                @import "compass/css3";

@import url(https://fonts.googleapis.com/css?family=Raleway:100,200,300);
@import "compass/css3/transform";

@mixin font($font-size, $line-height, $font-family, $font-weight) {
  font: #{$font-size}/#{$line-height} $font-family;
  font-weight: $font-weight;
}

@mixin keyframe($animation_name) {
  @keyframes #{$animation_name} {
    @content;
  }
}

@mixin animation($delay, $duration, $animation) {
  animation-delay: $delay;
  animation-duration: $duration;
  animation-name: $animation;
  animation-fill-mode: forwards;
}

@mixin breakpoint($point) {
  @if $point == big {
    @media screen and (max-width: 1600px) {
      @content;
    }
  } @else if $point == medium {
    @media screen and (max-width: 900px) {
      @content;
    }
  } @else if $point == small {
    @media screen and (max-width: 600px) {
      @content;
    }
  }
}

@include keyframe(content-opacity) {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@include keyframe(content-rotate-y) {
  from {
    @include transform(rotateY(90deg));
  }
  to {
    opacity: 1;
    @include transform(rotateY(0deg));
  }
}

@include keyframe(content-rotate-x) {
  from {
    @include transform(rotateX(90deg));
  }
  to {
    opacity: 1;
    @include transform(rotateX(0deg));
  }
}

@include keyframe(content-rotate-both) {
  from {
    @include transform(rotate(90deg));
    @include transform-origin(0% 50%);
  }
  to {
    opacity: 1;
    @include transform(rotate(0deg));
    @include transform-origin(0% 50%);
  }
}

@include keyframe(content-pop-out) {
  0% {
    opacity: 1;
    @include transform(scale(1));
  }
  50% {
    opacity: 1;
    @include transform(scale(1.1));
  }
  100% {
    opacity: 1;
    @include transform(scale(1));
  }
}

@include keyframe(content-pop-in) {
  from {
    opacity: 1;
    @include transform(scale(1.1));
  }
  to {
    opacity: 1;
    @include transform(scale(1));
  }
}

@include keyframe(content-slide-bot) {
  from {
    top: 20px;
    opacity: 0;
  }
  to {
    top: 0px;
    opacity: 1;
  }
}

@include keyframe(content-slide-top) {
  from {
    top: -20px;
    opacity: 0;
  }
  to {
    top: 0px;
    opacity: 1;
  }
}

/* used for wrapper animation after the load of the page */
@include keyframe(show) {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

$tab-head-color: #525252;
$tab-checked-border-color: #b8b63e;
$tab-border-color: #4d4c47;
$tab-text-color: #dbdbd3;
$tab-checked-text-color: #f2f2f2;
$tab-hover-color: #667876;
$tab-body-wrapper-color: #f7eec6;
$tab-delimiter-line-height: 5px;
$tab-label-height: 3em;

html {
  background: url(http://distinctionjewelry.com/info/wp-content/uploads/2013/01/blurred-background-10-2000x1250.jpg);
  webkit-font-smoothing: antialiased;
  @include font(1em, 1.5em, "Raleway", normal);
}

.tabs-wrapper {
  margin: 5% 10% 0 10%;
  input[type="radio"] {
    display: none;
  }
  label {
    transition: background 0.4s ease-in-out, height 0.2s linear;
    display: inline-block;
    cursor: pointer;
    color: $tab-text-color;
    width: 20%;
    height: $tab-label-height;
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
    background: $tab-head-color;
    text-align: center;
    line-height: 3em;
    &:last-of-type {
      border-bottom: none;
    }
    &:hover {
      background: $tab-hover-color;
      /*@include transform (translate(0,-0.2em));*/
    }
    @include breakpoint(big) {
      width: 15%;
    }
    @include breakpoint(medium) {
      width: 20%;
    }
    @include breakpoint(small) {
      width: 100%;
      display: block;
      border-bottom: 2px solid $tab-border-color;
      border-radius: 0;
    }
  }
  @include breakpoint(small) {
    margin: 0;
  }
}

#tab1,
#tab2,
#tab3,
#tab4 {
  &:checked {
    + label {
      background: $tab-checked-border-color;
      color: $tab-checked-text-color;
    }
  }
}

.tab-body {
  position: absolute;
  top: -9999px;
  // Set opacity to 1 if you won't use any animation which sets the opacity to 1
  opacity: 0;
  padding: 10px;
}

.tab-body-wrapper {
  background: $tab-body-wrapper-color;
  border-top: $tab-checked-border-color $tab-delimiter-line-height solid;
  border-bottom-right-radius: 3px;
  border-bottom-left-radius: 3px;
  border-top-right-radius: 3px;
  @include animation(0.2s, 1.5s, show);
  @include breakpoint(small) {
    border: none;
    border-radius: 0;
  }
}

#tab1:checked ~ .tab-body-wrapper #tab-body-1,
#tab2:checked ~ .tab-body-wrapper #tab-body-2,
#tab3:checked ~ .tab-body-wrapper #tab-body-3,
#tab4:checked ~ .tab-body-wrapper #tab-body-4 {
  position: relative;
  top: 0px;
  /* Choose one - modify .tab-body opacity to 1 if you don't want any animation or set opacity to 1 here */
  // @include animation(0.2s,0.8s,content-opacity);
  // @include animation(0.2s,0.8s,content-rotate-x);
  /* @include animation(0.2s,0.8s,content-rotate-y); */
  /* @include animation(0.2s,0.8s,content-rotate-both); */
  // @include animation(0.2s,0.8s,content-pop-in);
  @include animation(0.1s,0.4s,content-pop-out);
  /* @include animation(0.1s,1s,content-slide-bot); */
  // @include animation(0.1s, 1s, content-slide-top);
}
!

JS 

              
                /* checkout the commented parts of the scss */
!
999px

Console