index.css

* {
    box-sizing: border-box;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    background-color: hsl(212, 45%, 89%);
    font-size: 15px;
}



.qrcode-box {
    max-width: 100%;
    margin: 0 auto;
    background-color: hsl(0, 0%, 100%);
    overflow: hidden;
    text-align: center;
    width: 360px;
    border-radius: 20px;
}


.qrcode {
    background: url('./images/image-qr-code.png') no-repeat center center/cover;
    width: 320px;
    height: 320px;
    margin: 20px 20px 0px 20px;
    border-radius: 10px;
}

.qrcode-box h1 {
    width: 90%;
    font-size: 20px;
    padding: 20px;
    margin: 0 auto;
}

.qrcode-box p {
    width: 80%;
    margin: 0px auto 40px auto;
}