.fixButtons {
      position: fixed;
      left: -80px;
      top: 50%;
      z-index: 999999;
    }

    .fixButtons .uk-button {
      display: block;
      transform: rotate(90deg);
      text-align: center;
      padding: 5px 35px;
      font-size: 12px;
      letter-spacing: 1px;
      font-weight: 500;
      color: #fff;
    }

    .uk-button {
      min-height: 40px;
      line-height: 40px;
      font-size: 15px;
      box-shadow: rgba(0,0,0,0.15) 0 7px 20px;
      border-radius: 50px;
    }

    button-danger:hover {
      background-color: #F44336;
      color: #fff;
    }

    .uk-button-danger {
      background-image: -webkit-linear-gradient(-4deg, #F44336 0%, #E91E63 44%, #9C27B0 100%);
    }
<div class="fixButtons">
  <a href="" class="btn1 uk-button uk-button-danger md-trigger">Instagram'dan Takip Et!</a>
</div>

#header olacak

<div class="fixButtons">
  <a href="" class="btn1 uk-button uk-button-danger md-trigger">Instagram'dan Takip Et!</a>
</div>