* {
  margin: 0;
  padding: 0px;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

html {
  font-size: 62.5%;
  box-sizing: border-box;
}

body {
  font-size: 16px;
  /*1rem = 10px*/

  line-height: 1.6;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  grid-template-rows: repeat(3, auto);

  grid-template-areas: "nav"
    "main"
    "footer";
  margin: auto;
}

/* footer {
  background-color: rgb(242, 242, 242);
  margin: auto;
} */

nav,
main {
  max-width: 140rem;
  margin: auto;
}

.kenburns-bottom {
  transform-origin: 0% 0%;
  transform: scale(1) translateY(0);
  will-change: transform;
}

/* Estado activo: cuando se hace visible */
.kenburns-bottom-active {
  animation: kenburns-bottom 5s ease-out forwards;
}

@keyframes kenburns-bottom {
  0% {
    transform: scale(1) translateY(0);
    transform-origin: 50% 100%;
    /* centrado en el eje X, abajo en el eje Y */
  }

  100% {
    transform: scale(1.2) translateY(0);
    transform-origin: 50% 100%;
    /* mantiene el mismo punto de origen */
  }
}

/* ── BOTÓN IR AL INICIO (sección correspondiente en index) ── */
#goHomeBtn {
    position: fixed;
    bottom: calc(2rem + 50px + 0.8rem);
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: #c81330;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease;
    z-index: 9999;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

#goHomeBtn.visible {
    opacity: 1;
    visibility: visible;
}

#goHomeBtn:hover {
    transform: translateY(-4px);
    background-color: #a0102a;
}