:root {
  --color-text: navy;
  --color-bg: papayawhip;
  --size: clamp(5rem, 1rem + 25vmin, 15rem);
  --gap: calc(var(--size) / 14);
  --duration: 10s;
  --scroll-start: 0;
  --scroll-end: calc(-100% - var(--gap));
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: papayawhip;
    --color-bg: navy;
  }
}

.zk-label {
  color: #95BFFF;
}

.marquee {
  display: flex;
  overflow: hidden;
  user-select: none;
  gap: var(--gap);
      -webkit-mask-image: linear-gradient( var(--mask-direction, to right), hsl(0 0% 0% / 0), hsl(0 0% 0% / 1) 4%, hsl(0 0% 0% / 1) 97%, hsl(0 0% 0% / 0) );
}

.marquee__group {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--gap);
  min-width: 100%;
  animation: scroll-x var(--duration) linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .marquee__group {
    animation-play-state: paused;
  }
}

.marquee--vertical {
  --mask-direction: to bottom;
}

.marquee--vertical,
.marquee--vertical .marquee__group {
  flex-direction: column;
}

.marquee--vertical .marquee__group {
  animation-name: scroll-y;
}

.marquee--reverse .marquee__group {
  animation-direction: reverse;
  animation-delay: -3s;
}

@keyframes scroll-x {
  from {
    transform: translateX(var(--scroll-start));
  }
  to {
    transform: translateX(var(--scroll-end));
  }
}

@keyframes scroll-y {
  from {
    transform: translateY(var(--scroll-start));
  }
  to {
    transform: translateY(var(--scroll-end));
  }
}

.marquee zk {
  display: grid;
  place-items: center;
  width: var(--size);
  height: 100%;
  fill: var(--color-text);
  background: var(--color-bg-accent);
  aspect-ratio: 19 / 7;
  padding: calc(var(--size) / 20);
  border-radius: 2.5rem;
  text-align: center;
  font-size: 0.79rem;
}

.marquee--vertical zk {
  aspect-ratio: 1;
  width: calc(var(--size) / 1.5);
  padding: calc(var(--size) / 6);
}

/* Parent wrapper */
.wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  margin: auto;
  max-width: 100vw;
}

.wrapper--vertical {
  flex-direction: row;
  height: 100vh;
}

/* Toggle direction button */
.toggle {
  --size: 3rem;
  position: relative;
  position: fixed;
  top: 1rem;
  left: 1rem;
  width: var(--size);
  height: var(--size);
  font: inherit;
  text-align: center;
  cursor: pointer;
  outline: none;
  border: none;
  border-radius: 50%;
  color: inherit;
  background-color: var(--color-bg-accent);
  z-index: 1;
}

.toggle:focus-visible {
  box-shadow: 0 0 0 2px var(--color-text);
}

.toggle span {
  position: absolute;
  display: inline-block;
  top: 50%;
  left: calc(100% + 0.4em);
  width: fit-content;
  white-space: nowrap;
  transform: translateY(-50%);
  animation: fade 400ms 4s ease-out forwards;
  user-select: none;
}

.toggle zk {
  --size: 1.5rem;
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--size);
  height: var(--size);
  fill: currentcolor;
  transform: translate(-50%, -50%);
  transition: transform 300ms cubic-bezier(0.25, 1, 0.5, 1);
}

.toggle--vertical zk {
  transform: translate(-50%, -50%) rotate(-90deg);
}

@keyframes fade {
  to {
    opacity: 0;
    visibility: hidden;
  }
}