abtmtr-comms/assets/elements.css

html, body {
  height: 100%;
  box-sizing: border-box;
}

body {
  height: 100%;
  margin: 0 2rem;
  box-sizing: border-box;
}

main {
  margin: 0 auto;
  padding: 1rem 0;
  max-width: 768px;
}

header {
  margin-block-end: 3rem;
}

footer {
  margin-block-start: 3rem;
  margin-block-end: 2rem;
}

h1, h2 {
  margin: 1rem 0;
}

h3, h4, h5, h6, p {
  margin: 0.5rem 0;
}

/* i hate styling this element */
hr {
  border: none;
  background-color: currentColor;
  color: inherit;
  height: 1px;
  margin: 2em;
}

li {
  margin: 0.5rem 0;
}

section p {
  white-space: pre-line;
}

details summary {
  list-style-type: none; 
}

summary::after {
  cursor: pointer;
  content: "(?)";
  margin-left: 0.5ch;
  opacity: 0.5;
  text-decoration: underline dotted;
}

summary:hover::after {
  opacity: 0.4;
}

details[open] summary::after {
  content: "(v)";
}

input[readonly], textarea[readonly] {
  opacity: 0.5;
}

input, textarea,
button {
  background-color: transparent;
  color: inherit;
  border: 1px solid currentColor;
  padding: 4px 8px;
  font: inherit;
  font-weight: 500;
}

input[type=submit],
input[type=reset],
input[type=button],
button {
  border: 2px solid currentColor;
  cursor: pointer;
  padding: 8px 16px;
}

input[type=submit]:hover,
input[type=reset]:hover,
input[type=button]:hover,
a:hover,
button:hover {
  opacity: 0.8;
}

a {
  color: currentColor;
  font-weight: 500;
}