1STEP621のホームページです。
https://bulma.io/
https://w.atwiki.jp/aapose/pages/83.html
https://un4navi.com/prologue/20079/
https://q-az.net/buruburu-hurueru-css/
https://web-camp.io/magazine/archives/27870
https://techacademy.jp/magazine/24552
https://www.youtube.com/watch?v=KG2m-eGkOQI
https://www.zentai-powered.com/privacy-policy (プライバシーポリシー、免責事項の書き方を参考にしました)
https://www.xserver.ne.jp/blog/write-privacy-policy/#%E5%85%8D%E8%B2%AC%E4%BA%8B%E9%A0%85%E3%81%AB%E7%9B%9B%E3%82%8A%E8%BE%BC%E3%82%80%E9%A0%85%E7%9B%AE
https://digitalidentity.co.jp/blog/seo/ogp-share-setting.html
https://wemo.tech/1909
https://codelife.cafe/entry/2015/10/27/222803
http://web-dsn.com/css/position-footer/#position
https://ai-create.net/blog/2019/08/28/%E3%80%90%E6%B8%B8%E3%82%B4%E3%82%B7%E3%83%83%E3%82%AF%E3%80%91mac%E3%81%A8win%E3%81%AE%E5%B7%AE%E7%95%B0%EF%BC%81/
https://qiita.com/mpyw/items/dfc63c1fed5dfc5eda26
https://imasara-blog.com/post-2037/#Wayback_Machine-2
https://zbnr-hp.com/archiveis-block
https://naeco.jp/iframe-responsive
https://www.fenet.jp/dotnet/column/%E8%A8%80%E8%AA%9E%E3%83%BB%E7%92%B0%E5%A2%83/7601/
https://teratail.com/questions/167427
https://on-ze.com/archives/7778
https://black-flag.net/jquery/20110405-2878.html
https://www.fenet.jp/dotnet/column/language/6626/
https://www.sejuku.net/blog/46746
https://developer.mozilla.org/ja/docs/Web/CSS/text-overflow
https://wayohoo.com/article/5870
https://fuuno.net/ani/ani16/ani16.html
https://gotohayato.com/content/451/
https://www.sejuku.net/blog/25583
https://webdesign-abc.com/howto/head-tag/
https://www.sungrove.co.jp/ogp-setting/
https://www.buildinsider.net/web/jqueryref/037
https://qiita.com/nekoneko-wanwan/items/227ccad5f8cc449e91e9
https://omachizura.com/2015/04/javascript-json-length.html
https://qiita.com/yumetodo/items/00b37234cb86e741f0fb
https://sun-san-tech.com/regex/90/
https://js.studio-kingdom.com/jquery/traversing/not
https://www.jquerystudy.info/reference/traversing/add.html
https://qiita.com/minodisk/items/1fc538179ba8bd881325
https://www.javadrive.jp/javascript/object/index5.html
https://qumeru.com/magazine/450
https://boukenki.info/sakuraeditor-shiteimoji-ato-sakujo/
HTMLをまったく知らない状態から始めたので、このほかにもいろいろなサイトの情報を参考にさせていただきました。