*{
    margin: 0;
    padding: 0;
}
body{
    font-family: "Roboto", sans-serif;
    font-weight: 500;
    font-style: normal;
    font-size: 22px;
    color: #5F4B43;
    background-image: url("https://karls.de/images/woodtexture.webp");
}
div{
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    max-width: 90vw;
    width: auto;
    padding: 1rem;
}
#main-container{
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.rotating-border{
    animation: borderRotation 1s linear infinite;
    background: 
        linear-gradient(90deg, #333 50%, transparent 0) repeat-x,
        linear-gradient(90deg, #333 50%, transparent 0) repeat-x,
        linear-gradient(0deg, #333 50%, transparent 0) repeat-y,
        linear-gradient(0deg, #333 50%, transparent 0) repeat-y;
    background-size: 10px 2px, 10px 2px, 2px 10px, 2px 10px;
    background-position: 0 0, 0 100%, 0 0, 100% 0;
    display: flex;
    flex-direction: column;
}
@keyframes borderRotation {
    100% {
        background-position: 10px 0, -10px 100%, 0 -10px, 100% 10px;
    }
}
p{
    font-size: 2rem;
    width: 100%;
    text-align: center;
}

#qr-code{ 
    height: 50vh;
    margin: 0 auto 1rem;
}
#smrtphn-pic{
    width: 35vh;
    display: block;
}