hide difficulty of Luogu problem by lnw143

/* ==UserStyle==
@name         hide difficulty of Luogu problem
@version      20240622.17.17
@namespace    https://userstyles.world/user/lnw143
@description  Hide the difficulty of Luogu problems.
@author       lnw143
@license      No License
@preprocessor stylus
@var checkbox presetEnable "使用预设" 1
@var select preset "预设" ["'暂无评定'", "'入门'*", "'普及−'", "'普及/提高−'", "'普及+/提高'", "'提高+/省选−'", "'省选/NOI−'", "'NOI/NOI+/CTSC'", "'🤣'"]
@var text     difficultyText   "自定义难度显示文字"   "'入门'"
@var color    difficultyColor  "自定义难度显示颜色"   rgb(254, 76, 97)
==/UserStyle== */
@-moz-document url-prefix("https://www.luogu.com.cn/"),
url-prefix("https://www.luogu.com/") {
	:root {
		if(presetEnable) {
			if(preset=="暂无评定") {
				--difficulty-text: "暂无评定";
				--difficulty-color: rgb(191, 191, 191);
			}
			else if(preset=="入门") {
				--difficulty-text: "入门";
				--difficulty-color: rgb(254, 76, 97);
			}
			else if(preset=="普及−") {
				--difficulty-text: "普及−";
				--difficulty-color: rgb(243, 156, 17);
			}
			else if(preset=="普及/提高−") {
				--difficulty-text: "普及/提高−";
				--difficulty-color: rgb(255, 193, 22);
			}
			else if(preset=="普及+/提高") {
				--difficulty-text: "普及+/提高";
				--difficulty-color: rgb(82, 196, 26);
			}
			else if(preset=="提高+/省选−") {
				--difficulty-text: "提高+/省选−";
				--difficulty-color: rgb(52, 152, 219);
			}
			else if(preset=="省选/NOI−") {
				--difficulty-text: "省选/NOI−";
				--difficulty-color: rgb(157, 61, 207);
			}
			else if(preset=="NOI/NOI+/CTSC") {
				--difficulty-text: "NOI/NOI+/CTSC";
				--difficulty-color: rgb(14, 29, 105);
			}
			else if(preset=="🤣") {
				--difficulty-text: "不是哥们你做题看难度啊";
				--difficulty-color: linear-gradient(to right, rgb(254, 76, 97), rgb(243, 156, 17), rgb(255, 193, 22), rgb(82, 196, 26), rgb(52, 152, 219), rgb(157, 61, 207), rgb(14, 29, 105));
			}
		}
		else {
			--difficulty-text: difficultyText;
			--difficulty-color: difficultyColor;
		}
	}

	a[href*="problem/list?difficulty"] span {
		display: none;
	}
	a[href*="problem/list?difficulty"] {
		pointer-events: none;
	}
	a[href*="problem/list?difficulty"]:before {
		content: var(--difficulty-text);
		background: var(--difficulty-color);
		-webkit-background-clip: text;
		-webkit-text-fill-color: transparent;
		font-weight: bold;
	}
	a[href*="problem/list?difficulty"]:after,
	span:has(> a[href*="problem/list?difficulty"]):before {
		if(presetEnable && preset=="🤣") {
			content: "🤣";
			font-weight: bold;
		}
	}

	.header .difficulty {
		cursor: not-allowed;
	}
	.difficulty a span {
		display: none;
	}
	.difficulty a {
		pointer-events: none;
	}
	.difficulty a:before {
		if(presetEnable && preset=="🤣") {
			content: "🤣";
			background: var(--difficulty-color);
		}
		else {
			content: var(--difficulty-text);
			background: var(--difficulty-color);
		}
		color: rgb(255, 255, 255);

		display: inline-block;
		padding: 0 8px;
		box-sizing: border-box;
		font-weight: 400;
		line-height: 1.5;
		border-radius: 2px;
		font-size: 0.875em;
	}
}