Welcome To Blizzard CSS!
Its just WinterCSS but extended with more features,
We Have Solid And Outlined Buttons of these colors "Dark Crystal Light Success Danger Warning Primary"
Put This In Your Header to have the buttons, <link rel="stylesheet" type="text/css" href="https://blizzardcss.ct8.pl/blizzardbutton.css"/>
For clickable buttons for example here is one <button onclick="location.href = 'https://example.com';" class="success-btn"> </button>