Product preview card component with flex-box

Your site is pretty solid. Main things I'd add/modify are:

• a hover effect for your button using the :hover feature
• using variables so that its easier to tell which color is which. It also helps with reusability and quick modification. It would look something like this:

:root{
  /* Primary */
  --dark-cyan: hsl(158, 36%, 37%);
  --cream: hsl(30, 38%, 92%);

  /* Neutral */
  --very-dark-blue: hsl(212, 21%, 14%);
  --dark-grayish-blue: hsl(228, 12%, 48%);
  --white: hsl(0, 0%, 100%);

  --font-theme-montserrat: "Montserrat";
  --font-theme-fraunces: "Fraunces";
}

Then to use it you could do something like: color: var(--dark-grayish-blue);

Hope you find this feedback useful 👍