*{
 margin: 0;
 padding: 0;
 box-sizing: border-box;

}


h3{
    font-family: 'Arial';
    font-size: 25pt;
    letter-spacing: 1px;
    width: 100%;
    background: #2980b9;
    padding: 15px;
    color: #ffffff;
    text-align: center;
    text-transform: uppercase;
}

#container{
    background: #5d6d7e;
    width: 100%;
    height: 100vh;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    justify-content: center;
    align-items: center;

}


#container form{
    background: #ffffff;
    width: 350px;
    padding: 10px;

}
#container form  img {
    margin: 15px auto;
    text-align: center;
    display: block;
     }

#container form input{
    width: 90%;
    padding: 5px;
    font-size: 16pt;
    display: block;
    margin: 25px auto;
    border-radius: 5px;
    border: 1p solid #52be80;
    text-align: center;


}

#container form input[type="submit"]{
    background:#5dade2;
    padding: 10px;
    color: #ffffff;
    letter-spacing: 1px;
    border: 0;
    cursor: pointer;

}
.alert { 
    font-family: 'Arial';
    font-size: 16px;
    text-align: center;
    color: darkblue;
}