<link> head or body code example
Example: css in head or body
<head>
<style>
.myclass { font-size: 12px; }
</style>
</head>
// or ...
<body>
<button style="font-size: 12px;"></button>
</body>
<head>
<style>
.myclass { font-size: 12px; }
</style>
</head>
// or ...
<body>
<button style="font-size: 12px;"></button>
</body>