#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px
}

#back-to-top a {
  background: rgba(0,0,0,0.45);
  -webkit-border-radius: 7px;
  -moz-border-radius: 7px;
  -webkit-transition: 1s;
  -moz-transition: 1s;
  transition: 1s;
  width: 40px;
  height: 40px;
  display: block;
  font-size: 36px;
  color: #fff;
  text-align: center;
  border-radius: 3px 3px;
  text-decoration: none
}

#back-to-top a:hover {
  background-color: #0085a1
}

#back-to-top i {
  font-size: 24px;
  line-height: 40px;
  vertical-align: top
}

@media only screen and (max-width: 768px) {
  #back-to-top {
      right:0
  }

  .row {
      padding-left: 10px;
      padding-right: 10px
  }

  .post-container p {
      font-size: 14px
  }

  .post-container li {
      font-size: 14px
  }

  .post-container h2,h2 {
      font-size: 20px
  }

  .post-container h3,h3 {
      font-size: 16px
  }

  .post-container h4,h4 {
      font-size: 15px
  }

  .MathJax span {
      font-size: 15px
  }

  legend {
      font-size: 20px
  }

  .tab-content a {
      font-size: 14px
  }

  .badge {
      font-size: 10px
  }

  .text-muted {
      color: #bfbfbf;
      font-size: 14px
  }
}