#howToIntroSlides {
  display: none;
  position: relative;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}
#howToIntroSlides.is-on { display: block; }
#howToIntroSlides .how-to-intro-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  pointer-events: none;
}
#howToIntroSlides .how-to-intro-slide.is-active { opacity: 1; }
#howToIntroSlides:fullscreen,
#howToIntroSlides:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  background: #000;
}
.how-to-intro-toggle,
.how-to-intro-nav,
.how-to-intro-fs {
  z-index: 2;
  border: 0;
  color: #fff;
  background: rgba(15, 23, 42, 0.5);
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.how-to-intro-toggle {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, background 0.18s ease;
}
.how-to-intro-toggle svg { width: 32px; height: 32px; display: block; }
.how-to-intro-nav svg,
.how-to-intro-fs svg { width: 22px; height: 22px; display: block; }
#howToIntroSlides:hover .how-to-intro-toggle,
#howToIntroSlides.is-paused .how-to-intro-toggle,
.how-to-intro-toggle:focus-visible {
  opacity: 1;
  pointer-events: auto;
}
#howToIntroSlides.is-paused .how-to-intro-toggle .icon-pause,
#howToIntroSlides:not(.is-paused) .how-to-intro-toggle .icon-play,
#howToIntroSlides.is-fullscreen .how-to-intro-fs .icon-expand,
#howToIntroSlides:not(.is-fullscreen) .how-to-intro-fs .icon-compress {
  display: none;
}
.how-to-intro-bar {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 6px;
}
.how-to-intro-nav,
.how-to-intro-fs {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  opacity: 0.616;
}
.how-to-intro-toggle:hover,
.how-to-intro-nav:hover,
.how-to-intro-fs:hover {
  background: rgba(15, 23, 42, 0.72);
}
@media (hover: none) {
  .how-to-intro-toggle {
    opacity: 1;
    pointer-events: auto;
  }
}
@media (prefers-reduced-motion: reduce) {
  #howToIntroSlides .how-to-intro-slide { transition: none; }
}