/* CSS Document */

body {
      position: relative;
  }
  ul.nav-pills {
      top: 20px;
      position: fixed;
  }
  div.col-sm-9 div {
      height: 250px;
      font-size: 28px;
  }
  #section1 {color: #fff; background-color: #1E88E5;}
  #section2 {color: #fff; background-color: #673ab7;}
  #section3 {color: #fff; background-color: #ff9800;}
  #section41 {color: #fff; background-color: #00bcd4;}
  #section42 {color: #fff; background-color: #009688;}
  
  @media screen and (max-width: 810px) {
    #section1, #section2, #section3, #section41, #section42  {
        margin-left: 150px;
    }
  }
.btn {
    border: none;
    color: white;
    padding: 54px 72px;
    font-size: 16px;
    cursor: pointer;
}

<style>
p.small {
    line-height: 70%;
}

p.big {
    line-height: 200%;
}
</style>

.success {background-color: #4CAF50;} /* Green */
.success:hover {background-color: #46a049;}

.info {background-color: #2196F3;} /* Blue */
.info:hover {background: #0b7dda;}

.warning {background-color: #ff9800;} /* Orange */
.warning:hover {background: #e68a00;}

.danger {background-color: #f44336;} /* Red */ 
.danger:hover {background: #da190b;}

.default {background-color: #e7e7e7; color: black;} /* Gray */ 
.default:hover {background: #ddd;}