style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    height: 100vh;
    width: 100%;
    background: linear-gradient(to right bottom, #f845e0, #21c2f3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.name{
    width: 360px;
    /* background-color: crimson; */
    text-align: center;
    padding-bottom: 15px;
    color: white;
    font-family: 'Roboto', sans-serif;
}

.container{
    width: 360px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.container input[type="text"]{
    width: 100%;
    padding: 8px;
    font-size: 20px;
    outline: none;
    text-align: right;
    height: 50px;
    color: white;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5)
}

.container input[type="button"]{
    outline: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    height: 65px;
    color: white;
    width: calc(100% /4 - 5px);
    background: transparent;
    border-radius: 12px;
    margin-top: 15px;
}

.container input[type="button"]:hover{
    background-color: rgba(0, 0, 0, 0.2);
}