$cyan: #00bcd4;
$yellow: #ffeb3b;
$grey: #9e9e9e;

$num-of-tabs: 4;

@mixin tabs {
  @for $i from 1 through $num-of-tabs {
    &:nth-of-type(#{$i}) {
      &:checked {
        ~ .slide {
          left: calc((100% / #{$num-of-tabs}) * #{$i - 1});
        }
      }
    }
  }
}

html, body {
  width: 100%;
}

h1 {
  font-size: 26px;
  background: $cyan;
  color: #000;
      text-align: justify;
  
margin-left:6%;
 
}

label, p, a, h1, div {
  font-family: Roboto, sans-serif;
}

.tab-wrap {
  width: 70%;
    margin-left: 15%;
    position: relative;
    display: flex;
    top: 130px;
}

input[type="radio"][name="tabs"] {
  position: absolute;
  z-index: -1;
  &:checked {
    + .tab-label-content {
      label {
        color: white;
      }
      .tab-content {
        display: block;
      }
    }
  }
  @include tabs;
  &:first-of-type {
    &:checked {
      ~ .slide {
        left: 0;
      }
    }
  }
}

label {
  cursor: pointer;
  color: rgba(255,255,255,0.8);
  background-color: $cyan;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 56px;
  transition: color 0.2s ease;
  width: 100%;
}

.slide {
  background: $yellow;
  width: calc(100% / #{$num-of-tabs});
  height: 4px;
  position: absolute;
  left: 0;
  top: calc(100% - 4px);
  transition: left 0.3s ease-out;
}

.tab-label-content {
  width: 100%;
  .tab-content {
    position: absolute;
    top: 130px;
    left: 16px;
    line-height: 130%;
    display: none;
  }
}

@media screen and (max-width: 800px) {
  h1 {
        text-align: justify;
    margin-left:6%;

  }
  .tab-wrap {
    width: 80%;
    margin-left: 10%;
    top: 70px;
  }
}

//---------------------------------------------

.follow {
  width: 42px;
  height: 42px;
  border-radius: 50px;
  background: #03A9F4;
  display: block;
  margin: 300px auto 0;
  white-space: nowrap;
  padding: 13px;
  box-sizing: border-box;
  color: white;
  transition: all 0.2s ease;
  font-family: Roboto, sans-serif;
  text-decoration: none;
  box-shadow: 0 5px 6px 0 rgba(0,0,0,0.2);
  i {
    margin-right: 20px;
    transition: margin-right 0.2s ease;
  }
  &:hover {
    width: 134px;
    i {
      margin-right: 10px;
    }
  }
}

@media screen and (max-width: 800px) {
  .follow {
    margin: 400px auto 0;
  }
}