:root {
  color-scheme: light;
  --fondo: #f3f6fa;
  --texto: #192e43;
  --tenue: #536579;
  --primario: #135b63;
  --borde: #d5dee8;
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
  line-height: 1.6;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
}
a {
  color: var(--primario);
  text-underline-offset: 0.2em;
}
a:focus-visible {
  outline: 3px solid #a7490c;
  outline-offset: 5px;
}
.saltar {
  position: absolute;
  transform: translateY(-150%);
  padding: 0.8rem;
  background: white;
}
.saltar:focus {
  transform: none;
  z-index: 2;
}
.cabecera {
  background: white;
  border-bottom: 1px solid var(--borde);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.2rem max(1rem, calc((100% - 1120px) / 2));
}
.marca {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  font-weight: 750;
  text-decoration: none;
  color: var(--texto);
}
.simbolo {
  padding: 0.45rem 0.55rem;
  border-radius: 0.6rem;
  background: var(--primario);
  color: white;
}
.autor {
  font-size: 0.9rem;
}
main {
  max-width: 1120px;
  margin: auto;
  padding: 2rem 1.25rem;
}
.portada {
  padding: clamp(1.25rem, 4vw, 3rem);
  border: 1px solid var(--borde);
  background: white;
  border-radius: 1.2rem;
  margin-bottom: 2.5rem;
}
.etiqueta,
.paso {
  color: var(--primario);
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 0.06em;
}
h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin: 1rem 0 1.5rem;
}
h2 {
  font-size: 1.45rem;
  line-height: 1.3;
}
h3 {
  font-size: 1.1rem;
}
p {
  overflow-wrap: anywhere;
}
.introduccion {
  max-width: 68ch;
  color: var(--tenue);
  font-size: clamp(1rem, 2vw, 1.2rem);
}
.acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.8rem;
}
.boton {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0.85rem 1.25rem;
  border: 1px solid var(--primario);
  border-radius: 0.6rem;
  color: white;
  background: var(--primario);
  font-weight: 650;
  text-decoration: none;
  text-align: center;
}
.boton:hover {
  background: #0b454d;
}
.secundario {
  background: white;
  color: var(--primario);
}
.secundario:hover {
  background: #eaf4f3;
}
.aclaracion {
  max-width: 72ch;
  font-size: 0.9rem;
  color: var(--tenue);
}
.tarjetas {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
article {
  background: white;
  padding: 1.5rem;
  border: 1px solid var(--borde);
  border-radius: 1rem;
}
article p {
  color: var(--tenue);
}
.tecnica {
  max-width: 80ch;
  margin-block: 2.5rem;
}
.aviso {
  padding: 1.2rem;
  background: #fff4e8;
  border-radius: 0.75rem;
}
footer {
  max-width: 1120px;
  margin: auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--tenue);
  font-size: 0.9rem;
}
@media (max-width: 760px) {
  .tarjetas {
    grid-template-columns: 1fr;
  }
  .acciones {
    flex-direction: column;
    align-items: stretch;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}