body table { border: 3px solid blue; border-collapse: collapse; } body td, body th { border: 2px solid grey; } body th { background-color: LightGrey; } body input[type=number] { background-color: yellow; } body button:hover { background-color: orange; }

#bart { background-color: green; }

.pic { color: red; }

@media print { button[type=button] { display: none; } } /* If the browser window is 600px or smaller, the background color will be lightblue: */ @media only screen and (max-width: 600px) { body { background-color: lightblue; } }

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