body {
    margin: 0;
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
}

header {
    height: 60px;
    background-color: #003333;  /* #f44800 */
    color: whitesmoke;    
    text-align: center;
    font-size: 30px;
    display: flex;
    justify-content: center;
    align-items: center;    
}

main {
    border: #003333 1px solid;
    height: 200px;    
}

main p {    
    padding-left: 10px;
}

footer {
    background-color: lightgrey;
    height: 40px;
    padding: 5px;
}

.logo {
    width: 50px;
    height: 50px;       
}

.logo img {
    width: 30px;
    height: 30px;
    padding: 10px
}

 

/* different background when launched in standalone mode*/
@media all and (display-mode: standalone) {
    body {
      background-color: yellow;
    }
}