Replace font stack with modern font stack

tailwind.config.js

@@ -40,7 +40,7 @@ module.exports = {
 			'size-3xl': 'clamp(2.49rem, calc(1.09rem + 7.00vw), 9.49rem)',
 		},
 		fontFamily: {
-			sans: defaultTheme.fontFamily.sans,
+			sans: ['Avenir', 'Montserrat', 'Corbel', "'URW Gothic'", 'source-sans-pro', 'sans-serif'],
 			mono: ['"Space Grotesk"', ...defaultTheme.fontFamily.mono],
 		},
 		gap: ({theme}) => ({