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

html { color-scheme: dark; background: var(--color-fondo); }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--color-fondo);
  color: var(--color-texto);
  font-family: var(--font-titular);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.escena {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  align-content: center;
  gap: clamp(1.25rem, 4vw, 2.25rem);
  padding: var(--spacing-pagina);
  isolation: isolate;
  text-align: center;
}

/* ---------- Fondo ---------- */
.fondo { position: fixed; inset: 0; z-index: -1; overflow: hidden; background:
  radial-gradient(120% 90% at 50% 110%, var(--color-fondo-alterno), var(--color-fondo) 70%); }

.mancha {
  position: absolute;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  mix-blend-mode: screen;
  will-change: transform;
  animation:
    mancha-entra var(--duration-lenta-2) var(--ease-entrada) forwards,
    deriva var(--duration-deriva) var(--ease-cambio) infinite alternate;
}
.mancha-1 { background: radial-gradient(circle, var(--color-acento) 0%, transparent 65%); top: -25vmax; left: -15vmax; --o: 0.5; }
.mancha-2 { background: radial-gradient(circle, var(--color-acento-2) 0%, transparent 65%); bottom: -30vmax; right: -20vmax; --o: 0.42; animation-delay: var(--mov-retardo-mancha-2), var(--mov-fase-mancha-2); animation-duration: var(--duration-lenta-2), calc(var(--duration-deriva) * 1.25); }
.mancha-3 { background: radial-gradient(circle, var(--color-acento-3) 0%, transparent 65%); top: 30%; left: 45%; width: 40vmax; height: 40vmax; --o: 0.22; animation-delay: var(--mov-retardo-mancha-3), var(--mov-fase-mancha-3); animation-duration: var(--duration-lenta-2), calc(var(--duration-deriva) * 0.8); }

@keyframes mancha-entra { to { opacity: var(--o); } }
@keyframes deriva {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(9vmax, 6vmax, 0) scale(1.12); }
  100% { transform: translate3d(-6vmax, 10vmax, 0) scale(0.94); }
}

.foco {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(520px circle at var(--mx, 50%) var(--my, 50%), var(--color-luz-foco), transparent 65%);
  animation: aparece var(--duration-lenta-2) var(--ease-entrada) var(--mov-retardo-foco) forwards;
}

.vineta {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 45%, var(--color-sombra-borde) 100%);
}

.grano {
  position: absolute;
  inset: -50%;
  opacity: 0.07;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grano var(--duration-grano) steps(6) infinite;
}
@keyframes grano {
  0% { transform: translate(0, 0); } 20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); } 60% { transform: translate(-2%, -1%); }
  80% { transform: translate(3%, 3%); } 100% { transform: translate(0, 0); }
}

@keyframes aparece { to { opacity: 1; } }

/* ---------- Marca ---------- */
.marca {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-family: var(--font-etiqueta);
  font-size: var(--text-etiqueta);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-texto-suave);
  opacity: 0;
  transform: translateY(-0.6em);
  animation: marca-entra var(--duration-media-2) var(--ease-entrada) var(--mov-retardo-marca) forwards;
}
.punto {
  width: 0.55em;
  height: 0.55em;
  border-radius: 50%;
  background: var(--color-acento-3);
  box-shadow: 0 0 0 0 var(--color-acento-3);
  animation: pulso var(--duration-pulso) var(--ease-cambio) infinite;
}
@keyframes marca-entra { to { opacity: 1; transform: none; } }
@keyframes pulso {
  0%   { box-shadow: 0 0 0 0 var(--color-pulso-inicio); }
  70%  { box-shadow: 0 0 0 0.8em var(--color-pulso-fin); }
  100% { box-shadow: 0 0 0 0 var(--color-pulso-fin); }
}

/* ---------- Titular ---------- */
.titular {
  position: relative;
  margin: 0;
  font-size: var(--text-titular);
  font-weight: var(--peso-titular);
  line-height: 1;
  letter-spacing: var(--tracking-titular);
  font-kerning: none;
  font-variant-ligatures: none;
  text-wrap: balance;
  color: var(--color-texto);
  animation: respiro var(--duration-respiro) var(--ease-cambio) var(--mov-retardo-brillo) infinite alternate;
}
.palabra { display: inline-block; white-space: nowrap; }

.letra {
  display: inline-block;
  padding-bottom: var(--mov-holgura);
  margin-bottom: calc(var(--mov-holgura) * -1);
  opacity: 0;
  transform: translate(calc((var(--i) - var(--mov-centro)) * var(--mov-apertura)), var(--mov-distancia));
  filter: blur(var(--mov-desenfoque));
  animation: letra-entra var(--duration-entrada) var(--ease-entrada) forwards;
  animation-delay: calc(var(--mov-inicio) + var(--i) * var(--mov-escalonado));
  will-change: transform, opacity, filter;
}
@keyframes letra-entra {
  to { opacity: 1; transform: none; filter: blur(0); }
}

/* Barrido de luz sobre el titular, una vez terminada la entrada */
.titular::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  pointer-events: none;
  white-space: nowrap;
  color: transparent;
  background-image: linear-gradient(100deg, transparent 42%, var(--color-brillo) 50%, transparent 58%);
  background-size: 260% 100%;
  background-position: 160% 0;
  -webkit-background-clip: text;
  background-clip: text;
  opacity: 0;
  animation: brillo var(--duration-brillo) var(--ease-cambio) var(--mov-retardo-brillo) infinite;
}
@keyframes brillo {
  0%   { opacity: 0; background-position: 160% 0; }
  4%   { opacity: 1; }
  30%  { opacity: 1; background-position: -60% 0; }
  34%, 100% { opacity: 0; background-position: -60% 0; }
}
@keyframes respiro {
  from { text-shadow: 0 0 30px var(--color-resplandor-suave-1), 0 0 80px var(--color-resplandor-suave-2); }
  to   { text-shadow: 0 0 40px var(--color-resplandor-1), 0 0 110px var(--color-resplandor-2); }
}

/* ---------- Línea ---------- */
.linea {
  position: relative;
  width: var(--spacing-linea);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-texto-suave), transparent);
  transform: scaleX(0);
  opacity: 0.8;
  animation: linea-entra var(--duration-linea) var(--ease-entrada) var(--mov-retardo-linea) forwards;
}
.linea::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 28%;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--color-acento), transparent);
  filter: blur(1px);
  animation: viaja var(--duration-viaje) var(--ease-cambio) var(--mov-retardo-viaje) infinite;
}
@keyframes linea-entra { to { transform: scaleX(1); } }
@keyframes viaja {
  0% { left: -28%; opacity: 0; } 15% { opacity: 1; }
  85% { opacity: 1; } 100% { left: 100%; opacity: 0; }
}

/* ---------- Accesibilidad ---------- */
.solo-lectores {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: var(--mov-reducido) !important;
    animation-delay: var(--mov-reducido) !important;
    animation-iteration-count: 1 !important;
  }
  .mancha { animation: mancha-entra var(--mov-reducido) forwards; }
  .grano { animation: none; }
  .titular::after, .linea::after, .punto { animation: none; }
  .titular { animation: none; }
}