*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: var(--fuente);
  font-size: var(--paso-0);
  font-weight: 300;
  line-height: var(--ritmo);
  overflow-x: hidden;
}
::selection { background: rgba(59, 130, 246, 0.3); }

h1, h2, h3 {
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--paso-5); }
h2 { font-size: var(--paso-4); }
h3 { font-size: var(--paso-2); }
p { margin: 0 0 var(--paso-0); max-width: var(--medida); text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--neon-azul); outline-offset: 3px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }

.meta {
  font-family: var(--fuente-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--texto-secundario);
}
.degradado-texto {
  background: var(--degradado);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.saltar {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--texto);
  color: var(--fondo);
  padding: 0.75rem 1.25rem;
}
.saltar:focus { left: 0; }
.envoltura {
  width: min(100% - 2.5rem, 72rem);
  margin-inline: auto;
  position: relative;
}

.boton {
  display: inline-block;
  background: var(--texto);
  color: var(--fondo);
  font-weight: 600;
  padding: 0.8rem 1.9rem;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  transition: transform var(--dur-corta) var(--curva), box-shadow var(--dur-corta) var(--curva);
}
.boton:hover { transform: scale(1.05); box-shadow: 0 0 20px rgba(255, 255, 255, 0.2); }
.boton:active { transform: scale(0.95); }

.vidrio {
  background: var(--vidrio);
  border: 1px solid var(--vidrio-borde);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.cabecera {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  width: min(100% - 2rem, 60rem);
  border-radius: 999px;
  padding: 0.6rem 1.4rem;
}
.cabecera__fila { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.cabecera__marca { font-weight: 700; letter-spacing: -0.02em; font-size: 1rem; }
.cabecera__nav { display: flex; gap: 1.75rem; align-items: center; }
.cabecera__nav a { position: relative; font-size: 0.9rem; font-weight: 500; color: var(--texto-suave); }
.cabecera__nav a::after {
  content: '';
  position: absolute;
  inset: auto auto -4px 0;
  block-size: 1px;
  inline-size: 100%;
  background: var(--texto);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-corta) var(--curva);
}
.cabecera__nav a:hover::after, .cabecera__nav a:focus-visible::after { transform: scaleX(1); }
.cabecera__boton { display: none; background: none; border: 0; cursor: pointer; color: var(--texto-suave); font-family: var(--fuente); font-size: 0.9rem; padding: 0; }
.indice {
  border: 0;
  padding: 0;
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  background: rgba(12, 17, 40, 0.97);
  color: var(--texto);
}
.indice nav { display: flex; flex-direction: column; gap: 1.25rem; padding: 5.5rem 1.75rem 2rem; }
.indice nav a { font-size: var(--paso-3); font-weight: 800; letter-spacing: -0.02em; display: flex; gap: 1rem; align-items: baseline; }
.indice__cerrar { position: absolute; top: 1.5rem; right: 1.5rem; background: none; border: 0; cursor: pointer; color: var(--texto-secundario); font-family: var(--fuente); }
@media (max-width: 48rem) {
  .cabecera__nav { display: none; }
  .cabecera__boton { display: block; }
}

.pie { position: relative; padding: 6rem 0 2rem; }
.pie__cta { text-align: center; margin-bottom: 5rem; }
.pie__cta h2 { font-size: var(--paso-5); margin-bottom: 2rem; }
.pie__fila {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--vidrio-borde);
  padding-top: 1.5rem;
}
.pie__fila p { color: var(--texto-secundario); font-size: 0.85rem; margin: 0; }