css elements from a bunch of classless CSS library that I like

_nav.css

# from chota
.nav {
  display: flex;
  min-height: 5rem;
  align-items: stretch;
}

.nav-center,
.nav-left,
.nav-right {
  display: flex;
  flex: 1;
}

.nav-left {
  justify-content: flex-start;
}

.nav-right {
  justify-content: flex-end;
}

.nav-center {
  justify-content: center;
}

@media screen and (max-width: 480px) {
  .nav {
    flex-direction: column;
  }

  .nav-center,
  .nav-left,
  .nav-right {
    flex-wrap: wrap;
    justify-content: center;
  }
}

.nav a {
  text-decoration: none;
  display: flex;
  align-items: center;
  padding: 1rem 2rem;
  color: #3f4144;
}

.nav [aria-current="page"]:not(.button),
.nav .active:not(.button) {
  color: #000; /* fallback */
  color: #14854f;
}

myclassless.css

:root {
  --secondary-fore-color: #444;
  --blockquote-color: #f57c00;
  --secondary-border-color: #ddd;
  --universal-margin: 0.5rem;
  --universal-padding: 0.5rem;
  --universal-border-radius: 0.125rem;
  --preformatted: #ccc;
}

# from mini.css
blockquote {
  display: block;
  position: relative;
  font-style: italic;
  color: var(--secondary-fore-color);
  margin: var(--universal-margin);
  padding: calc(3 * var(--universal-padding));
  border: 0.0625rem solid var(--secondary-border-color);
  border-left: 0.375rem solid var(--blockquote-color);
  border-radius: 0 var(--universal-border-radius) var(--universal-border-radius) 0;
}

blockquote:before {
  position: absolute;
  top: calc(0rem - var(--universal-padding));
  left: 0;
  font-family: sans-serif;
  font-size: 3rem;
  font-weight: 700;
  content: "\201c";
  color: var(--blockquote-color);
}

blockquote[cite]:after {
  font-style: normal;
  font-size: 0.75em;
  font-weight: 700;
  content: "\a—  " attr(cite);
  white-space: pre;
}

header.sticky {
  position: -webkit-sticky;
  position: sticky;
  z-index: 1101;
  top: 0;
}

footer.sticky {
  position: -webkit-sticky;
  position: sticky;
  z-index: 1101;
  bottom: 0;
}

#from simple.css
kbd {
  color: var(--preformatted);
  border: 1px solid var(--preformatted);
  border-bottom: 3px solid var(--preformatted);
  border-radius: var(--standard-border-radius);
  padding: 0.1rem 0.4rem;
}