Answers for "link href stylesheet"

link stylesheet

<link rel="stylesheet" type="text/css" href="/style.css">

link external css

<link href="style.css" rel="stylesheet" type="text/css">

link stylesheet

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/morioh/dist/css/morioh.min.css">

css without separate file

just add any style inside the first <p> or other element tag using style=" ;" 
<p style="font-size: xx-large;">test</p>