html, body {
  height: 100%;
  overflow-x: hidden;
  overflow-y: hidden;
}

body {
  margin: 0 auto;
  background-color: #f5f9ff;
}

h1 {
  text-align: center;
  font-size: 1.4em;
}

#settings {
  text-align: center;
  margin-top: 4em;
}

#controls {
  border: 1px solid #000000;
  width: 256px;
  margin: 0 auto;
  margin-top: 2em;
  padding: 0.6em 1em;
  display: none;
}

#trees-etc {
  font-size: 2em;
}

/* ref https://ryanmulligan.dev/blog/css-marquee/ */

.marquee {
  --gap: 1rem;
  position: relative;
  display: flex;
  overflow: hidden;
  user-select: none;
  gap: var(--gap);
}

#marquee-content {
  flex-shrink: 0;
  display: flex;
  justify-content: space-around;
  gap: var(--gap);
  min-width: 100%;
  animation: marquee 2048s linear infinite;
}



@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(calc(-100% - var(--gap)));
  }
}