{"id":5342,"date":"2026-06-17T12:36:57","date_gmt":"2026-06-17T03:36:57","guid":{"rendered":"https:\/\/dennie.tokyo\/it\/?p=5342"},"modified":"2026-06-17T12:44:17","modified_gmt":"2026-06-17T03:44:17","slug":"%e3%80%90css%e3%80%91%e5%a4%89%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/dennie.tokyo\/it\/?p=5342","title":{"rendered":"\u3010CSS\u3011\u5909\u6570\u306e\u4f7f\u7528"},"content":{"rendered":"\n<p>CSS\u3067\u5909\u6570\u304c\u4f7f\u3048\u308b\u3068\u306e\u4e8b\u306a\u306e\u3067\u3001\u4f7f\u7528\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<h1 class=\"wp-block-heading\">\u5909\u6570\u306e\u5b9a\u7fa9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9a\u7fa9\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u5909\u6570\u540d<\/h3>\n\n\n\n<p>\u5909\u6570\u540d\u306b\u306f\u5148\u982d\u306b\u30cf\u30a4\u30d5\u30f3\u30922\u3064\u4ed8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>--basic-color: #f53838;<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30b3\u30fc\u30d7<\/h3>\n\n\n\n<p>\u5909\u6570\u3092\u9069\u7528\u3059\u308b\u7bc4\u56f2\u3092\u6c7a\u3081\u307e\u3059\u3002<strong>:root<\/strong> \u64ec\u4f3c\u30af\u30e9\u30b9\u306b\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3069\u3053\u304b\u3089\u3067\u3082\u53c2\u7167\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>:root {\n\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9a\u7fa9\u4f8b<\/h3>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>:root {\n  --basic-color: #f53838;\n}<\/code><\/pre><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">\u4f7f\u7528\u65b9\u6cd5<\/h1>\n\n\n\n<p>var\u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>var(\u5909\u6570\u540d)<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u4f8b<\/h2>\n\n\n\n<p><strong>HTML<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;div class=&quot;container&quot;&gt;\n  &lt;p class=&quot;text-A&quot;&gt;\u3042\u3044\u3046\u3048\u304a&lt;\/p&gt;\n  &lt;p class=&quot;text-B&quot;&gt;\u304b\u304d\u304f\u3051\u3053&lt;\/p&gt; \n&lt;\/div&gt;\n&lt;p class=&quot;text-C&quot;&gt;\u3055\u3057\u3059\u305b\u305d&lt;\/p&gt;<\/code><\/pre><\/div>\n\n\n\n<p><strong>CSS<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>:root {\n  --basic-color: #f53838;\n}\n\n.container {\n  background-color: aqua;\n  width: 150px;\n}\n\n.text-A {\n  color: var(--basic-color);\n}\n\n.text-B {\n  color: var(--basic-color);\n}\n\n.text-C {\n  color: var(--basic-color);\n}<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u7d50\u679c<\/strong><\/p>\n\n\n\n<style>\n:root {\n  --basic-color: #f53838;\n}\n\n.container_1 {\n  background-color: aqua;\n  width: 150px;\n}\n\n.text-A_1 {\n  color: var(--basic-color);\n}\n\n.text-B_1 {\n  color: var(--basic-color);\n}\n\n.text-C_1 {\n  color: var(--basic-color);\n}\n<\/style>\n<div class=\"container_1\">\n  <p class=\"text-A_1\">\u3042\u3044\u3046\u3048\u304a<\/p>\n  <p class=\"text-B_1\">\u304b\u304d\u304f\u3051\u3053<\/p> \n<\/div>\n<p class=\"text-C_1\">\u3055\u3057\u3059\u305b\u305d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30b9\u30b3\u30fc\u30d7<\/h2>\n\n\n\n<p>\u5909\u6570\u306e\u5b9a\u7fa9\u3092 :root \u64ec\u4f3c\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u3001\u30b9\u30b3\u30fc\u30d7\u306e\u7bc4\u56f2\u3092\u660e\u78ba\u306b\u3057\u3066\u307f\u307e\u3059\u3002<br>\u30b9\u30b3\u30fc\u30d7\u3092 container\u30af\u30e9\u30b9 \u306b\u9650\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p><strong>HTML<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;div class=&quot;container&quot;&gt;\n  &lt;p class=&quot;text-A&quot;&gt;\u3042\u3044\u3046\u3048\u304a&lt;\/p&gt;\n  &lt;p class=&quot;text-B&quot;&gt;\u304b\u304d\u304f\u3051\u3053&lt;\/p&gt; \n&lt;\/div&gt;\n&lt;p class=&quot;text-C&quot;&gt;\u3055\u3057\u3059\u305b\u305d&lt;\/p&gt;<\/code><\/pre><\/div>\n\n\n\n<p><strong>CSS<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.container {\n  background-color: aqua;\n  width: 150px;\n  --basic-color: #f53838;\n}\n\n.text-A {\n  color: var(--basic-color);\n}\n\n.text-B {\n  color: var(--basic-color);\n}\n\n.text-C {\n  color: var(--basic-color);\n}<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u7d50\u679c<\/strong><\/p>\n\n\n\n<style>\n:root {\n  --basic-color: unset;\n}\n\n.container_2 {\n  background-color: aqua;\n  width: 150px;\n  --basic-color: #f53838;\n}\n\n.text-A_2 {\n  color: var(--basic-color);\n}\n\n.text-B_2 {\n  color: var(--basic-color);\n}\n\n.text-C_2 {\n  color: var(--basic-color);\n}\n<\/style>\n<div class=\"container_2\">\n  <p class=\"text-A_2\">\u3042\u3044\u3046\u3048\u304a<\/p>\n  <p class=\"text-B_2\">\u304b\u304d\u304f\u3051\u3053<\/p> \n<\/div>\n<p class=\"text-C_2\">\u3055\u3057\u3059\u305b\u305d<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u6700\u5f8c\u306b<\/h1>\n\n\n\n<p>\u7279\u306b\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CSS\u3067\u5909\u6570\u304c\u4f7f\u3048\u308b\u3068\u306e\u4e8b\u306a\u306e\u3067\u3001\u4f7f\u7528\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":4723,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-5342","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-css"],"_links":{"self":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/5342","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5342"}],"version-history":[{"count":7,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/5342\/revisions"}],"predecessor-version":[{"id":5349,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/5342\/revisions\/5349"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/media\/4723"}],"wp:attachment":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}