#intro {
  position: fixed;
  top: 0;
  left: 0;
  width: 100svw;
  height: 100svh;
  background-color: rgba(0, 0, 0, 0.9);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0.5rem;
}

.intro-content {
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 3rem;
}

#controls-top,
#controls-bottom {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  color: white;
  width: 100svw;
}

.buttons-row {
  display: flex;
  width: 100%;
  justify-content: space-between;
  align-items: center;
  touch-action: manipulation;
}

.control-description-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 1rem;
}

.control-description-container hr {
  flex: 1;
  border: none;
  height: 1px;
  background-color: white;
  opacity: 0.3;
}

.control-description {
  margin: 0;
  text-align: center;
  white-space: nowrap;
}

.control-button {
  --size: 3rem;
  --border-radius: 0.5rem;
  height: var(--size);
  background-color: deeppink;
  border: none;
  font-size: 1.5rem;
  color: white;
  padding: 0 1rem;
}

.control-button.square {
  width: var(--size);
  padding: 0;
}

#controls-top {
  position: absolute;
  top: 0;
  left: 0;
}

#controls-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
}

#increase-sensitivity,
#decrease-sensitivity,
#increase-density,
#decrease-density {
  background-color: deeppink;
  border: none;
  width: var(--size);
  height: var(--size);
}

#increase-sensitivity {
  border-radius: 0 0 0 var(--border-radius);
}

#decrease-sensitivity {
  border-radius: 0 0 var(--border-radius) 0;
}

#increase-density {
  border-radius: var(--border-radius) 0 0 0;
}

#decrease-density {
  border-radius: 0 var(--border-radius) 0 0;
}

#important-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
#important-info {
  background-color: rgba(255, 215, 0, 0.2);
  border: 2px solid gold;
  border-radius: 1rem;
  padding: 1rem;
  margin: 1rem 0;
}

#important-info p:first-child {
  color: deeppink;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

#important-info-title {
  color: gold !important;
}