* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; width: 100%; overflow: hidden; font-family: 'Segoe UI', sans-serif; color: white; }

body {
  position: relative;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 110vw;
  height: 110vh;/**/
  /*
  background: url("./img/fondo.png") center center / cover no-repeat;
  */
  background: url("./img/red-neuronal-invertida.png") center center / cover no-repeat;
  z-index: -1;
  animation: zoomandmove 40s ease-in-out infinite;
  transform-origin: center;
}


.slide {
  position: absolute;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  padding: 60px;
  text-align: center;
  opacity: 0;
  transition: opacity 1s ease;
  z-index: 0;
  pointer-events: none;
}

.slide.visible {
  opacity: 1;
  z-index: 1;
  pointer-events: auto;
}

.slide h1 {
  font-size: 3.8em;
  margin-bottom: 0.5em;
}

.slide h2 {
  font-size: 3em;
  margin-bottom: 0.5em;
}

.slide h3 {
  font-size: 2.5em;
  margin-bottom: 0.5em;
}
.slide p, li {
  font-size: 2.5em;
  line-height: 1.5;
}

p.chico{
  font-size: 1.8em;
}

.slide h1, .slide h2, .slide p {
   text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.813);
}

.nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3em;
  color: #444;
  background: rgba(255,255,255,0.6);
  border-radius: 50%;
  padding: 10px 20px;
  cursor: pointer;
  z-index: 10;
  user-select: none;
}

.nav-left { left: 20px; }
.nav-right { right: 20px; }
.nav-arrow:hover { background: rgba(255,255,255,0.9); }

.carousel {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 70vh;
  position: relative;
}

.carousel img {
  max-height: 100%;
  max-width: 90%;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
  position: absolute;
  opacity: 0;
  transition: opacity 1s ease;
  z-index: 0;
}

.carousel img.active {
  opacity: 1;
  z-index: 1;
}

.zoomable {
  display: inline-block;
  transition: transform 0.3s ease;
  cursor: default;
  position: relative;
  padding-left: 2em;
  z-index: 3;
}

li.zoomable{
  display: block;
}

.sonoro::before {
  content: "🔊";
  position: absolute;
  left: 0;
  top: 0;
}

.zoomable:hover {
  transform: scale(1.3);
}

@keyframes zoomandmove {
  0% {
    transform: scale(1) translate(0px, 0px);
    filter: brightness(1);
  }
  25% {
    transform: scale(1.05) translate(15px, 15px);
    filter: brightness(1.06);
  }
  50% {
    transform: scale(1.10) translate(5px, 5px);
    filter: brightness(1.12);
  }
  100% {
    transform: scale(1) translate(0px, 0px);
    filter: brightness(1);
  }
}