H1 { text-align:center; font-size:3cm; color:lightsteelblue; font-weight:bold; font-family:Arial }
<HTML>
<HEAD>
<TITLE>STYLE SHEET sample1</TITLE>
<LINK REL="StyleSheet" TYPE="text/css" HREF="style.css">
</HEAD>
<BODY>
<H1>style</H1>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE>STYLE SHEET sample2</TITLE>
<STYLE TYPE="text/css">
@import url("style.css");
</STYLE>
</HEAD>
<BODY>
<H1>sheet</H1>
</BODY>
</HTML>