style.css

*,
*:before,
*:after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    height: 100vh;
    background: #222;    
    background-image: url('https://source.unsplash.com/random/1600x900/?math');
    );
}
.container{
    position: absolute;
    width: 50%;
    min-width: 580px;
    transform: translate(-50%,-50%);
    top: 50%;
    left: 50%;
    background: #000000d0;
    color: white;
    padding: 50px 10px;
    border-radius: 30px;
    display: grid;
    justify-items: center;
    font-family: 'Poppins',sans-serif;
}
h3{
    font-size: 16px;
    font-weight: 600;
}
input[type="text"]{
    width: 90px;
    font-weight: 600;
    color: #003973;
    padding: 20px 0;
    text-align: center;
    margin-top: 30px;
    border-radius: 5px;
    border: 2px solid #202020;
    font-size: 28px;
}
button{
    width: 160px;
    padding: 15px 0;
    border-radius: 5px;
    background-color: #003973;
    color: #ffffff;
    border: none;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 30px;
    outline: none;
}
p{
    font-weight: 400;
}