.input-group{
    display: flex;
}
.input-group > input{
    height: auto;
}
.input-group > *{
   border-radius: 0;
}
.input-group > *:first-child:not(:only-child){
    border-radius: 3px 0 0 3px;
    border-right: 0;
}
.input-group > *:last-child:not(:only-child){
    border-radius: 0 3px 3px 0;
    border-left: 0;
}
.input-group >*:only-child{
    border-radius: 3px;
}

/*input.dark,*/
/*textarea.dark,*/
/*select.dark{*/
/*    background-color: #333333;*/
/*    color: #dddddd;*/
/*    border: 1px solid #545454;*/
/*    box-shadow: none;*/
/*    font-weight: 300;*/
/*}*/

.form-control.dark{
    background-color: #333333;
    color: #dddddd;
    border: 1px solid #545454;
    box-shadow: none;
    font-weight: 300;
}
.form-control.dark:focus{
    box-shadow: none;
    background-color: #444444;
    border-color: #666666;
}
.form-control.dark:disabled{
    opacity: .3;
}
label.dark{
    color: #ddd;
    margin-bottom: .25rem;
    font-weight: 300;
}