:root {
  --fondo: #07080d;
  --superficie: #12141c;
  --linea: rgba(214, 220, 255, 0.14);
  --texto: #f4f6fb;
  --suave: #c5cad8;
  --acento: #8b7cff;
  --acento-azul: #6ea2ff;
  --foco: #d7e2ff;
  --ancho: 72rem;
  --espacio: clamp(1.25rem, 2vw, 2rem);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 70% 45% at 15% -10%, rgba(110, 162, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 0%, rgba(139, 124, 255, 0.16), transparent 50%),
    var(--fondo);
  color: var(--texto);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: auto -20% 8% auto;
  width: 28rem;
  height: 28rem;
  background: radial-gradient(circle, rgba(110, 162, 255, 0.08), transparent 68%);
  pointer-events: none;
  animation: deriva 18s ease-in-out infinite alternate;
}

.saltar {
  position: absolute;
  left: 1rem;
  top: 0;
  transform: translateY(-120%);
  padding: 0.6rem 0.9rem;
  background: var(--texto);
  color: var(--fondo);
  border-radius: 0.5rem;
  z-index: 3;
}

.saltar:focus {
  transform: translateY(0.75rem);
}

.cabecera {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 1rem var(--espacio);
  background: rgba(7, 8, 13, 0.86);
  backdrop-filter: blur(12px);
}

.marca {
  color: var(--texto);
  font-weight: 650;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.menu a,
.marca:hover,
.marca:focus-visible {
  color: var(--suave);
}

a {
  color: var(--acento-azul);
}

a:hover,
a:focus-visible {
  color: var(--foco);
}

a:focus-visible {
  outline: 2px solid var(--foco);
  outline-offset: 3px;
  border-radius: 0.25rem;
}

main {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 0 var(--espacio) 4rem;
}

.hero {
  padding: clamp(3.5rem, 10vw, 7rem) 0 clamp(3rem, 6vw, 4.5rem);
  animation: entrada 0.7s ease both;
}

.etiqueta {
  display: inline-block;
  margin: 0 0 1.25rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--linea);
  border-radius: 999px;
  color: var(--suave);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.4rem;
  color: var(--texto);
  font-size: clamp(3.5rem, 10vw, 6.5rem);
  font-weight: 640;
  letter-spacing: -0.045em;
  line-height: 0.95;
}

@supports ((background-clip: text) or (-webkit-background-clip: text)) {
  h1 {
    background: linear-gradient(100deg, var(--texto) 20%, var(--acento-azul) 55%, var(--acento) 90%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.subtitulo {
  max-width: 18ch;
  margin-bottom: 1.25rem;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.descripcion,
.bloque p {
  max-width: 42rem;
  color: var(--suave);
}

.bloque {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  border-top: 1px solid var(--linea);
}

h2 {
  margin-bottom: 0.85rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.03em;
}

.pasos {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.pasos li {
  min-height: 100%;
  padding: 1.15rem 1rem 1.25rem;
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 1rem;
}

.paso-numero {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  margin-bottom: 0.85rem;
  border-radius: 999px;
  background: linear-gradient(140deg, var(--acento-azul), var(--acento));
  color: #071018;
  font-size: 0.85rem;
  font-weight: 700;
}

.pasos h3 {
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
}

.pasos p,
.funciones {
  margin-bottom: 0;
}

.funciones {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding: 0;
  list-style: none;
}

.funciones li {
  padding: 1rem 1.1rem;
  background: rgba(18, 20, 28, 0.75);
  border: 1px solid var(--linea);
  border-radius: 0.9rem;
}

.estado p {
  margin-bottom: 0;
  color: var(--texto);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  letter-spacing: -0.03em;
}

.pie {
  border-top: 1px solid var(--linea);
  padding: 1.5rem var(--espacio) 2rem;
  color: var(--suave);
  text-align: center;
}

.pie p {
  margin: 0;
}

@keyframes entrada {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes deriva {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-8%, 6%, 0);
  }
}

@media (max-width: 800px) {
  .pasos,
  .funciones {
    grid-template-columns: 1fr;
  }

  .cabecera {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero,
  body::before {
    animation: none;
  }
}