#about-trigger,
#mute-toggle {
  position: fixed;
  bottom: 1.25rem;
  z-index: 10002;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: 1rem var(--serifFont), serif;
  line-height: 1;
  cursor: pointer;
}

#about-trigger { left: 1.25rem; }
#mute-toggle   { right: 1.25rem; }

#about-trigger:hover,
#mute-toggle:hover { opacity: .55; }

#mute-toggle .mute-note {
  position: relative;
  display: inline-block;
}

#mute-toggle[aria-pressed="true"] .mute-note { opacity: .5; }

#mute-toggle[aria-pressed="true"] .mute-note::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1.15em;
  height: 1px;
  background: currentColor;
  transform: translate(-50%, -50%) rotate(-45deg);
}

#about-modal[hidden] { display: none; }

#about-modal {
  position: fixed;
  inset: 0;
  z-index: 10003;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, .78);
}

.about-panel {
  width: min(100%, 34rem);
  padding: 1rem;
  background: transparent;
  text-align: center;
}

.about-panel h2 {
  margin: 0 0 .6rem;
  font-size: 1.1rem;
  font-weight: normal;
}

.about-author {
  margin: 0 0 1.4rem;
}

.about-panel p {
  font-size: .9rem;
  line-height: 1.6;
}

.about-panel p:last-child { margin: 0; }