calculator-styles.css

div {
	display: inline-block;
	font-size:xx-large;
}

input[type="text"] {
  padding: 10px;
  border: solid 1px #dcdcdc;
  transition: box-shadow 0.3s, border 0.3s;
  font-size:32px;
  visibility: hidden;
}
input[type="text"]:focus,
input[type="text"].focus {
  border: solid 1px #707070;
  box-shadow: 0 0 5px 1px #969696;
}

.bg-1 { 
    background-color: #1abc9c; /* Green */
    color: #ffffff;
}
.bg-2 { 
    background-color: #474e5d; /* Dark Blue */
    color: #ffffff;
}
.bg-3 { 
    background-color: #fdffff; /* White */
    color: #555555;
}

.container-fluid {
    padding-top: 70px;
    padding-bottom: 70px;
}

  body {
      font: 20px Montserrat, sans-serif;
      line-height: 1.8;
      color: #f5f6f7;
  }
  p {font-size: 16px;}
  .margin {margin-bottom: 45px;}
  .bg-1 { 
      background-color: #1abc9c; /* Green */
      color: #ffffff;
  }
  .bg-2 { 
      background-color: #474e5d; /* Dark Blue */
      color: #ffffff;
  }
  .bg-3 { 
      background-color: #ffffff; /* White */
      color: #555555;
  }
  .bg-4 { 
      background-color: #2f2f2f; /* Black Gray */
      color: #fff;
  }
  .container-fluid {
      padding-top: 70px;
      padding-bottom: 70px;
  }
  .navbar {
      padding-top: 15px;
      padding-bottom: 15px;
      border: 0;
      border-radius: 0;
      margin-bottom: 0;
      font-size: 12px;
      letter-spacing: 5px;
  }
  .navbar-nav  li a:hover {
      color: #1abc9c !important;
  }