<head>
	<style>
    /* 1. Page background image */
		.notion-app:before {
		  content: "";
		  position: fixed;
		  left: 0;
		  top: 0;
		  width: 100%;
		  height: 100%;
		  z-index: -10;
		  background: url("https://cdn.lazyrockets.com/homepage/360abb10007541a9b4a3e9f04f7a9343_crumbled-paper-1.jpg") no-repeat center center;
		  -webkit-background-size: cover;
		  -moz-background-size: cover;
		  -o-background-size: cover;
		  background-size: cover;
		}

    .notion-frame {
      background-color: transparent !important;
    }
	</style>
  <style>
    /* 2. Checklist background color */
    div[aria-checked=true] {
      background-color: #724a26 !important;
    }
  </style>
  <style>
    /* 3. Callout background image */
    .notion-callout-block {
      background: url("https://cdn.lazyrockets.com/homepage/360abb10007541a9b4a3e9f04f7a9343_craft.jpg");
	    background-size: cover;
    }

    /* 3. Callout text color */
    .notion-callout-block > * {
      color: #fff !important;
    }
  </style>

Mujin.Seoul