body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}
.box {
    width: 300px;
    padding: 30px;
    position:absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.4);
    text-align: center;
}

.box h1 {
    color: wheat;
    text-transform: uppercase;
    font-weight: 700;
}
.box input[type="text"],.box input[type="password"]{
border: 0;
background: none;
display: block;
margin: 20px;
text-align: center;
border: 3px solid blue;
padding: 14px 10px;
width: 220px;
outline: none;
color: white;
border-radius: 24px;
transition: 0.25px;
}

.box input[type="text"]:focus,.box input[type="password"]:focus{

    width: 270px;
    border-color: rgb(104, 245, 48);

}
.box input [type="submit"]{
border: 0;
background: none;
display: block;
margin: 20px;
text-align: center;
border: 3px solid rgb(104, 245, 48);
padding: 14px 10px;
outline: none;
color: white;
border-radius: 24px;
transition: 0.25px;
cursor: pointer;
}
.box input [type="submit"]:hover{
    background: yellow;

}

#submit {
    height: 2rem;
    width: 6rem;
    border-radius: 3rem;


}

.hidden {
    display: none;
}