style.css

*{
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
    font-family: 'Josefin Sans', sans-serif;
}
body{
    background: whitesmoke;
    display: flex;
    padding-top: 3px;
    padding-left: 5px;
    line-height: 1.5;
}
.card{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 500px;
    height: auto;
    background: white;
    border-radius: 5px;
    box-shadow: 0px 0px 10px gray;
    padding-top: 40px;
}
.card .head{
    font-weight: 700;
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    color: #2F3C7E;
}
.card .line{
    border-bottom: 2px solid #2F3C7E;
    margin-top: 30px;
    
}
.card .form{
    padding-left: 30px;
    padding-top: 20px;
    color: #2F3C7E;
    font-weight: 700;
}
.card input{
    width: 80px;
    height: 50px;
    outline: none;
    padding-left: 7px;
    border: 1.5px solid #2F3C7E;
    box-shadow: 1px 1px 2px #2F3C7E;
}
.block{
    width: 145px;
    padding: 5px 20px;
    display: inline-block;
    margin-top: 10px;
}
input[type="text"]{
    color: #2F3C7E;
    font-weight: 600;
    font-size: 20px;
}
input[type="text"]::after{
    color: #2F3C7E;
    font-weight: 600;
    font-size: 20px;
}
.button{
    padding: 20px;
    position: absolute;
    left: 50%;
    transform: translate(-50%);
}
.button button{
    height: 50px;
    width: 130px;
    outline: none;
    border: 2px solid white;
    background: #2F3C7E;
    color: white;
    font-size: 24px;
    font-weight: 400;
    cursor: pointer;
    border-radius: 5px;
}
#output{
    display: block;
    margin: 10px;
    margin-top: 90px;
    padding: 10px;
    overflow: hidden;
    font-size: 30px;
    line-height: 1.5;
    color: #2F3C7E;
    font-weight: 500;
}
label{
    color: #2F3C7E;
    font-weight: 800;
    font-size: 20px;
}
.card input::placeholder{
    color: #2F3C7E;
    font-size: 10px;
}