panel/app/assets/stylesheets/editor.scss

.editor {
	box-sizing: border-box;
	*, *::before, *::after { box-sizing: inherit; }

	h1, h2, h3, h4, h5, h6, p, li {
		min-height: 1.5rem;
	}

	mark {
		background: #f206f9;
		padding: 0;
	}

	.selected { outline: #f206f9 solid medium; }

	iframe {
		min-height: 480px;
	}

	img, video, iframe, audio {
		width: 100%;
		max-width: 600px;
		display: block;
		margin: 0 auto;
	}

	.editor-toolbar {
		position: sticky;
		top: 0px;
		background: white;
	}

	.editor-primary-toolbar, .editor-auxiliary-toolbar {
		display: block;
		overflow-x: auto;
		white-space: nowrap;
	}

	.editor-auxiliary-toolbar {
		& > * {
			display: none;
		}
		.editor-auxiliary-tool-active {
			display: block;
		}
	}

	.editor-content {
		word-wrap: break-word;
		div[data-align="left"] { text-align: left; }
		div[data-align="center"] { text-align: center; }
		div[data-align="right"] { text-align: right; }
	}

	*[data-editor-loading] {
		opacity: 0.5;
	}

	*[data-editor-error] {
		filter: grayscale(100%);
	}
}