about.css

/* Colors in this CSS are hardcoded because we want the about
screen to always look the same, no matter what skin is used. */

#about-dialog {
  /* Please keep these colors in sync with skins/default.css */
  --back: #181c25;
  --text: #fefefe;
  --primary: #ffbb50;
}

#about-dialog::backdrop {
  background-color: #0008;
}

#about-dialog {
  max-width: 900px;
  border: 1px solid black;
  border-radius: .5rem;
  background: var(--back);
  color: var(--text);
  box-shadow: 0 0 1rem 0 #0008;
  overflow: hidden;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 2fr;
  grid-template-rows: min-content auto auto;
}

#about-dialog:not([open]) {
  display: none;
}

#about-dialog > * {
  grid-column: 1;
}

#about-dialog .screenshot {
  grid-column: 2;
  grid-row: 1 / -1;
  background-image: url(./visualizer.png);
  background-repeat: no-repeat;
  background-size: cover;
}

#about-dialog .logo {
  place-self: center;
  margin: 2rem 0 1rem 0;
}

#about-dialog h1, #about-dialog h2 {
  text-align: center;
  margin: 1rem;
  font-size: 1rem;
}

#about-dialog h2 {
  font-weight: normal;
  font-size: .8rem;
  margin: 2rem;
}

#about-dialog p {
  font-size: .8rem;
  margin: 1rem 2rem;
}

#about-dialog .actions {
  margin: 0 1rem 2rem 1rem;
  text-align: center;
}

#about-dialog button {
  font-size: .8rem;
  background: var(--primary);
  color: var(--back);
  border-radius: .25rem;
  padding: .3rem;
  cursor: pointer;
}

#about-dialog button[disabled] {
  display: none;
}