:root {
  --tinta:      #10233d;
  --tinta-suave:#3d4f68;
  --papel:      #fbfaf7;
  --papel-alt:  #f2efe9;
  --borde:      #ddd8cf;
  --acento:     #9c2a2a;
  --acento-sua: #7a2121;
  --aviso-fondo:#fdf3d8;
  --aviso-borde:#e6c96a;
  --aviso-texto:#5a4409;
  --maxw: 68rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --tinta:      #edeae4;
    --tinta-suave:#a9b3c2;
    --papel:      #11151c;
    --papel-alt:  #171c25;
    --borde:      #2b323e;
    --acento:     #e8776f;
    --acento-sua: #f09a93;
    --aviso-fondo:#2a2410;
    --aviso-borde:#6b5a20;
    --aviso-texto:#e8d9a4;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--papel);
  color: var(--tinta);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.contenido { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.contenido.estrecho { max-width: 38rem; }

/* Aviso superior */
.aviso {
  background: var(--aviso-fondo);
  border-bottom: 1px solid var(--aviso-borde);
  color: var(--aviso-texto);
  font-size: .9rem;
  padding: .7rem 1.5rem;
  text-align: center;
}

/* Cabecera */
.cabecera {
  border-bottom: 3px double var(--borde);
  padding: 2.2rem 0 1.4rem;
  text-align: center;
}
.mancheta {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin: 0;
  line-height: 1.05;
}
.descriptor {
  font-size: .82rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--tinta-suave);
  margin: .7rem 0 0;
}

/* Hero */
.hero { padding: 3.5rem 0 3rem; }
.hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.75rem, 4.6vw, 2.9rem);
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 1.2rem;
  max-width: 24ch;
}
.entrada {
  font-size: clamp(1.02rem, 2.2vw, 1.18rem);
  color: var(--tinta-suave);
  max-width: 54ch;
  margin: 0 0 1.8rem;
}
.entrada strong { color: var(--tinta); }

.acciones { display: flex; flex-wrap: wrap; gap: 1rem 1.6rem; align-items: center; margin: 0; }

.boton {
  display: inline-block;
  background: var(--acento);
  color: #fff;
  border: 0;
  border-radius: 3px;
  padding: .8rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
}
.boton:hover { background: var(--acento-sua); }
@media (prefers-color-scheme: dark) { .boton { color: #17120f; } }

.enlace { color: var(--tinta); text-underline-offset: .25em; }

/* Secciones */
.seccion { padding: 3.2rem 0; border-top: 1px solid var(--borde); }
.seccion.alterna { background: var(--papel-alt); }
.seccion h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.4rem, 3.4vw, 1.95rem);
  margin: 0 0 1.6rem;
}
.intro { color: var(--tinta-suave); max-width: 58ch; margin: 0 0 1.8rem; }

/* Tarjetas */
.rejilla {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.5rem;
}
.tarjeta {
  background: var(--papel);
  border: 1px solid var(--borde);
  border-radius: 4px;
  padding: 1.5rem;
}
.etiqueta {
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--acento);
  font-weight: 700;
  margin: 0 0 .5rem;
}
.tarjeta h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.22rem;
  margin: 0 0 .7rem;
  line-height: 1.3;
}
.tarjeta p { margin: 0 0 .8rem; }
.nota {
  font-size: .87rem;
  color: var(--tinta-suave);
  border-top: 1px solid var(--borde);
  padding-top: .8rem;
  margin: 0 !important;
}

/* Reglas */
.reglas { list-style: none; padding: 0; margin: 0 0 1.8rem; max-width: 60ch; }
.reglas li {
  padding: .85rem 0 .85rem 1.6rem;
  border-bottom: 1px solid var(--borde);
  position: relative;
}
.reglas li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--acento);
  font-weight: 700;
}
.pie-reglas { color: var(--tinta-suave); max-width: 58ch; margin: 0; }

/* Formulario */
.formulario { margin-top: 1.5rem; }
.campo { margin-bottom: 1.2rem; }
.campo label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .95rem; }
.opcional { font-weight: 400; color: var(--tinta-suave); }
.campo input[type="email"],
.campo input[type="text"] {
  width: 100%;
  padding: .7rem .8rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--tinta);
  background: var(--papel);
  border: 1px solid var(--borde);
  border-radius: 3px;
}
.campo input:focus-visible { outline: 2px solid var(--acento); outline-offset: 1px; }
.consentimiento label {
  display: flex;
  gap: .7rem;
  align-items: flex-start;
  font-weight: 400;
  font-size: .92rem;
  color: var(--tinta-suave);
}
.consentimiento input { margin-top: .3rem; flex: none; }
.formulario .nota { border: 0; padding-top: .9rem; }
.oculto { position: absolute; left: -9999px; }

/* Pie */
.pie {
  border-top: 3px double var(--borde);
  padding: 2.5rem 0 3rem;
  color: var(--tinta-suave);
  font-size: .92rem;
}
.mancheta-pie {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--tinta);
  margin: 0 0 .8rem;
}
.pie p { max-width: 62ch; margin: 0 0 .7rem; }
.legal { font-size: .85rem; }