style.css

body{
  font-family: 'Open Sans';
  padding:0px;
  margin:0px;
}

/*
  General css options
*/

.default_button {
  background-color: rgba(52, 73, 94,0.7); /* Green */
  border: none;
  color: white;
  padding: 15px 18px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  transition: 0.7s;
}

.default_button:hover{
 cursor: pointer;
 transition: 0.7s;
 background-color:  rgba(52,73,94,1);
}
.danger_button {
  background-color: rgb(231, 76, 60,0.7); /* red*/
  border: none;
  color: white;
  padding: 15px 18px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  transition: 0.7s;
}
.danger_button:hover{
  cursor: pointer;
  transition: 0.7s;
  background-color:  rgb(231, 76, 60,1); /* red*/
}

label{
  margin-left: 20px;
  margin-right:20px;
}

.active{
  font-size:24px;
  opacity:1;
}

.menu{
  background-color: #ecf0f1;
  width:15%;
  height:100vh;
  float:left;
}
.col-lg-9{
  margin-left:2%;
  width:80%;
  float:left;
  height:100vh;
}
.menu ul{
  padding-left:0px;
}
.menu ul li{
  margin-top:5px;
  margin-bottom:5px;
  font-size:16px;
  opacity:0.8;
  text-align: center;
  list-style: none;
}
.menu ul li a{
  color:#333;
  text-decoration: none;
}