Hot Tip

🔥 Another great use case for Flexbox is when you want a label to span "the rest" of the width beside an input without knowing widths

🔥 CSS case insensitive attribute selectors are coming! Part of Selectors Level 4.

🔥 Flexbox tip: In most cases, `margin: auto;` on flex-items does the same thing as `justify-content: center; align-items: center;`