.bd-placeholder-img {
   font-size: 1.125rem;
   text-anchor: middle;
   -webkit-user-select: none;
   -moz-user-select: none;
   -ms-user-select: none;
   user-select: none;
}

@media (min-width: 768px) {   

   .bd-placeholder-img-lg {
      font-size: 3.5rem;      
   }
}

html,
body {
height: 100%;
}

body {
/* display: -ms-flexbox;
display: flex;
-ms-flex-align: center;
align-items: center; */
padding-top: 10vw;
padding-bottom: 40px;
background-color: #f5f5f5;
}

.form-signin {
width: 100%;
max-width: 330px;
padding: 15px;
margin: auto;
}
.form-signin .form-control {
position: relative;
box-sizing: border-box;
height: auto;
padding: 10px;
font-size: 16px;
}
.form-signin .form-control:focus {
z-index: 2;
}
.form-signin #username {
margin-bottom: -1px;
border-bottom-right-radius: 0;
border-bottom-left-radius: 0;
}
.form-signin #password {
margin-bottom: 10px;
border-top-left-radius: 0;
border-top-right-radius: 0;
}

.input-group-text{
   width: 49px;
}