/* ==========================================================================
   UAIII — Páginas de sección
   Portada interior, índice de contenidos, navegación entre páginas
   ========================================================================== */

/* --------------------------------------------------------------------------
   Portada interior
   -------------------------------------------------------------------------- */

.portada {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(560px, 88svh, 940px);
  padding-top: calc(var(--header-h) + clamp(2.5rem, 7vh, 5rem));
  padding-bottom: clamp(2.5rem, 6vh, 4.5rem);
  background: var(--tinta);
  color: var(--texto-invertido);
  overflow: hidden;
}

.portada__reticula {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to right,
    transparent 0,
    transparent calc(12.5% - 1px),
    rgba(246, 241, 233, 0.055) calc(12.5% - 1px),
    rgba(246, 241, 233, 0.055) 12.5%
  );
  mask-image: linear-gradient(to bottom, transparent 0, #000 24%, #000 82%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 24%, #000 82%, transparent 100%);
}

.portada__arco {
  position: absolute;
  top: clamp(-16rem, -14vw, -7rem);
  right: clamp(-13rem, -9vw, -5rem);
  width: clamp(320px, 42vw, 640px);
  aspect-ratio: 1;
  pointer-events: none;
  z-index: 0;
}

.portada__arco svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.portada__arco .arco-trazo {
  fill: none;
  stroke: var(--oro);
  stroke-width: 12;
  stroke-linecap: round;
  opacity: 0.2;
}

.portada__arco .arco-punto {
  fill: var(--oro);
  opacity: 0.9;
}

.portada__contenido {
  position: relative;
  z-index: 1;
  width: 100%;
}

@media (min-width: 1000px) {
  .portada__contenido {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.68fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: end;
  }
}

/* Migas de pan */
.migas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-size: var(--fs-mini);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(246, 241, 233, 0.55);
  margin-bottom: clamp(1.5rem, 4vh, 2.5rem);
}

.migas a {
  color: var(--oro);
  transition: color 0.3s ease;
}

.migas a:hover {
  color: #fff;
}

.migas i {
  font-style: normal;
  opacity: 0.45;
}

.migas [aria-current] {
  color: var(--texto-invertido);
}

/* Número de sección */
.portada__num {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--ff-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--oro);
  font-variant-numeric: tabular-nums;
  margin-bottom: clamp(1rem, 2.5vh, 1.6rem);
}

.portada__num::after {
  content: "";
  flex: 1;
  max-width: 12rem;
  height: 1px;
  background: linear-gradient(to right, var(--oro-linea), transparent);
}

.portada__titulo {
  margin-top: clamp(0.9rem, 2.2vh, 1.4rem);
  max-width: 24ch;
  font-size: clamp(2.05rem, 1rem + 3.4vw, 3.9rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
}

.portada__titulo .mascara {
  display: block;
  overflow: hidden;
  padding-bottom: 0.05em;
}

.portada__titulo .linea {
  display: block;
}

.portada__titulo .cursiva {
  font-style: italic;
  color: var(--oro);
}

.portada__lead {
  margin-top: clamp(1.25rem, 3vh, 2rem);
  max-width: 54ch;
  font-size: var(--fs-lead);
  line-height: 1.62;
  color: var(--texto-invertido-medio);
}

.portada__pie {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  align-items: center;
  margin-top: clamp(1.75rem, 4vh, 2.75rem);
  padding-top: clamp(1.25rem, 3vh, 1.75rem);
  border-top: 1px solid var(--linea-oscura);
  font-size: var(--fs-mini);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(246, 241, 233, 0.55);
}

/* Índice de la página */
.portada__indice {
  margin-top: clamp(2.25rem, 5vh, 3.25rem);
}

@media (min-width: 1000px) {
  .portada__indice {
    margin-top: 0;
  }
}

.portada__indice > p {
  font-size: var(--fs-mini);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(246, 241, 233, 0.55);
  margin-bottom: 0.9rem;
}

.portada__indice ol {
  border-top: 1px solid var(--linea-oscura);
}

.portada__indice li {
  border-bottom: 1px solid var(--linea-oscura);
}

.portada__indice a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 0.9rem;
  align-items: baseline;
  padding: 0.7rem 0;
  color: rgba(246, 241, 233, 0.78);
  transition: color 0.3s ease, padding-left 0.4s var(--ease);
}

.portada__indice a:hover {
  color: var(--oro);
  padding-left: 0.4rem;
}

.portada__indice b {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--oro);
  font-variant-numeric: tabular-nums;
}

.portada__indice span {
  font-family: var(--ff-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* --------------------------------------------------------------------------
   Índice de secciones (home)
   -------------------------------------------------------------------------- */

.indice {
  border-top: 1px solid var(--linea);
}

.indice__item {
  border-bottom: 1px solid var(--linea);
}

.indice__item a {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: center;
  padding: clamp(1.35rem, 2.6vw, 2rem) clamp(0.75rem, 2vw, 1.5rem);
  margin-inline: clamp(-0.75rem, -2vw, -1.5rem);
  transition: background-color 0.4s ease;
}

.indice__item a:hover {
  background: rgba(173, 21, 25, 0.045);
}

.indice__num {
  font-family: var(--ff-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--linea-fuerte);
  font-variant-numeric: tabular-nums;
  transition: color 0.35s ease;
}

.indice__item a:hover .indice__num {
  color: var(--rojo);
}

.indice__cuerpo {
  display: grid;
  gap: 0.4rem;
}

.indice__titulo {
  font-family: var(--ff-display);
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.018em;
  transition: color 0.35s ease;
}

.indice__item a:hover .indice__titulo {
  color: var(--rojo);
}

.indice__texto {
  color: var(--texto-medio);
  font-size: var(--fs-small);
  line-height: 1.6;
  max-width: 64ch;
}

.indice__flecha {
  display: grid;
  place-items: center;
  width: clamp(38px, 4vw, 46px);
  height: clamp(38px, 4vw, 46px);
  border: 1px solid var(--linea-fuerte);
  border-radius: 50%;
  color: var(--texto-medio);
  transition: background-color 0.4s var(--ease), border-color 0.4s ease,
    color 0.4s ease, transform 0.4s var(--ease);
}

.indice__flecha svg {
  width: 15px;
  height: 15px;
}

.indice__item a:hover .indice__flecha {
  background: var(--rojo);
  border-color: var(--rojo);
  color: #fff;
  transform: translateX(5px);
}

@media (max-width: 700px) {
  .indice__item a {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.35rem 1rem;
    align-items: start;
  }

  .indice__flecha {
    display: none;
  }

  .indice__num {
    grid-row: span 2;
    padding-top: 0.2rem;
  }
}

/* --------------------------------------------------------------------------
   Cierre compacto en páginas de sección
   -------------------------------------------------------------------------- */

.cierre--compacta {
  padding-block: clamp(3.5rem, 6vw, 6rem);
}