m5wp.momentry.ddns.net/plugins/code-snippets/css/edit/_editor.scss

.CodeMirror,
.snippet-form textarea {
	inline-size: 100%;
	font-family: monospace;
}

.CodeMirror-sizer {
	min-block-size: 300px !important;
	box-sizing: border-box;
	padding-block-end: 1.5em !important;

	&::after {
		position: absolute;
		inset-block-end: 0;
	}

	.snippet-form.php-snippet & {
		padding-block-end: 0 !important;

		&::before {
			content: '<?php';
		}
	}

	.snippet-form.css-snippet & {
		&::before {
			content: '<style>';
		}

		&::after {
			content: '</style>';
		}
	}

	.snippet-form.js-snippet & {
		&::before {
			content: '<script>';
		}

		&::after {
			content: '</script>';
		}
	}

	.snippet-form.html-snippet & {
		&::before {
			content: '<!-- begin content -->';
		}

		&::after {
			content: '<!-- end content -->';
		}
	}
}

.snippet-editor {
	position: relative;
}

.snippet-editor-help {
	position: absolute;
	inset-inline-end: 5px;
	inset-block-start: 5px;

	td {
		&:first-child {
			padding-inline-end: 0.5em;
		}

		@media (width >= 512px) {
			white-space: nowrap;
		}
	}

	.mac-key {
		display: none;
	}

	.platform-mac {
		.mac-key {
			display: inline;
		}

		.pc-key {
			display: none;
		}
	}
}