style.css

body {
    background: #f8f8f8;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.contain {
    width: 400px;
    height: 300px;
    border-radius: 20px;
    padding: 30px;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.title {
    font-size: 30px;
    font-weight: bold;
}
input {
    width: 200px;
    height: 40px;

    outline: 0;
    border: solid 0.5px #cbcbcb;
    /*margin-bottom: 20px;*/
    margin-top: 20px;
    border-radius: 50px;
    padding-left: 16px;
}
.btn {
    margin-top: 20px;
    width: 220px;
    height: 50px;
    border-radius: 50px;
    background: #178cff;
    color: white;
    font-size: 18px;
    font-weight: bold;

    outline: 0;
    border: 0;
}