*{
    box-sizing: border-box;
}
body{
    background-color: rgba(0, 0, 0, 0.753);
}
.card-login{
    margin:50px auto;
    padding: 20px;
    width: 350px;
    height: 150px;
    
}
.card-body{
    border-top: none;
    border: 1px solid black;
    background-color: #ccc;
}
.card-header{
    border: 1px solid black;
    border-bottom: none;
    text-align: center;
    line-height: bold;
    font-size: 25px;
    background-color: #ccc;
}
input{
    border: 1px solid #ccc;
}
.icon{
    width: 25px;
    height: 25px;
    background: url('./opto.png');
}
.flash{
    margin:8px 0px;
    border: 2px solid red;
    background-color: rgba(255, 0, 0, 0.836);
    color: white;
    text-align: center;
    text-transform: uppercase;
    padding: 5px;
}