How to Apply CSS Padding Around Your Website's Elements
background-clip - スタイルシートリファレンス
The `background-clip` Property and its Use Cases | CSS-Tricks - CSS-Tricks
CSS background-clip Property
css - background-clip: border-box behaves like its value were padding-box - Stack Overflow
background-clip property in CSS 👇 ✳️ This property sets the background extension Values: ✳️ border-box ✳️ padding-box ✳️ content-box ✳️ text - Twitter thread by Poonam Soni @CodeByPoonam - Rattibha
CSS3のbackground-clipプロパティって知ってた? - Qiita
The `background-clip` Property and its Use Cases | CSS-Tricks - CSS-Tricks