body{
    background-color: #3b3b3b;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}
.box{
    position: absolute;
    width: 300px;
    padding: 40px;
    background-color: #1b1b1b;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
}
.box h2{
    color: white;
    text-transform: uppercase;
    font-weight: 500;
}
.box input[type = "text"], .box input[type= "password"]{
    border: 0;
    background: none;
    display: block;
    margin: 20px auto;
    text-align: center;
    border: 2px solid #ffc107;
    padding: 14px 10px;
    width: 200px;
    outline: none;
    color: white;
    border-radius: 24px;
    transition: 0.25s;
}.box input[type = "text"]:focus, .box input[type= "password"]:focus{
    width: 280px;
}
.box input[type="submit"]{
    border:0;
    background: none;
    display: block;
    margin: 20px auto;
    text-align: center;
    border: 2px solid #ffc107;
    padding: 14px 40px;
    outline: none;
    color: white;
    border-radius: 24px;
    transition: 0.25s;
    cursor: pointer;
}
.box input[type="submit"]:focus{
    background: #ffc107;
}