styles.css

* {
  margin: 0;
  padding: 0;
}

html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

:root {
  --spacing: 1rem;
  --max-width: 56rem;

  --font-size-button: 1rem;
  --font-family: -system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

  --color-light-gray: #f5f5f5;
  --color-background-code: var(--color-light-gray);
}

.hidden {
  /* Viljum að þetta feli alltaf element, notum því !important */
  display: none !important;
}

html {
  font-family: var(--font-family);
}

input,
textarea,
button {
  font-size: inherit;
}

h1,
h2,
h3 {
  margin-block-end: var(--spacing);
}

code {
  display: inline-block;

  background-color: var(--color-background-code);
  padding: 0.2em 0.3em;
  border-radius: 0.2em;
}

code.wide {
  display: block;
  padding: 0.4em 1em;
  margin-inline-start: -1rem;
  margin-inline-end: -1rem;
  width: calc(100% + 2rem);
}

pre {
  overflow-x: auto;
}

main {
  display: flex;
  flex-direction: column;
  gap: var(--spacing);

  margin: var(--spacing) auto;
  padding-inline: var(--spacing);
  max-width: var(--max-width);
}

.string-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing);
}

.string-form .buttons {
  display: flex;
  gap: var(--spacing);
}

.string-form .output {
  display: flex;
  flex-direction: column;
  gap: var(--spacing);
}

.string-form .output ul {
  list-style: none;
}

textarea {
  min-height: 30vh;
  padding: 1rem;
  margin-inline-start: -1rem;
  margin-inline-end: -1rem;
}

button {
  padding: 0.5rem 1rem;
  cursor: pointer;

  font-size: var(--font-size-button);
}