CSS: overflow
https://developer.mozilla.org/ja/docs/Web/CSS/overflow
https://saruwakakun.com/html-css/basic/overflow
overflow-x
overflow-y
キーワード値
overflow: visible
default
内容が要素のboxを超えてもscrollbarは表示されない
overflow: hidden
overflow: clip
https://zenn.dev/ruri14/articles/c85b4fcc6783c7
overflow: scroll
overflow: auto
overflow: hidden visible
グローバル値
overflow: inherit
overflow: initial
overflow: revert
overflow: unset
ScrollできるContainerを作る