/* ============================================
   DESAFÍOS — listing page
   Plataforma premium de desafíos abiertos de IA.
   Coherente con el resto del sitio: paleta cyan
   + pink, glass cards, hover sutil, sin íconos
   extra ni elementos administrativos.
   ============================================ */

.desafios-hero {
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(0, 229, 255, 0.07), transparent 70%),
    radial-gradient(ellipse 60% 40% at 10% 50%, rgba(234, 64, 118, 0.06), transparent 70%);
  /* El top grande despeja el nav fijo; el resto del ritmo vertical de la
     página usa --section-pad-sm (escala de core.css) para que las siete
     secciones del arco Challenge → Evento → Biblioteca respiren igual. */
  padding-top: clamp(120px, 14vw, 180px);
  padding-bottom: var(--section-pad-sm);
  position: relative;
}
.desafios-hero::before {
  content: "";
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.3), transparent);
}
.desafios-hero .section__title {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
}

/* Cifras del Challenge — datos de apoyo del deck (meta de obras, periodo de
   creación, premiación en vivo). Se reutiliza también en el bloque del legado. */
.desafios-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-5);
  max-width: 860px;
  margin: var(--section-head-gap) auto 0;
}
.desafios-stat { text-align: center; }
.desafios-stat__value {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--c-white);
}
.desafios-stat__label {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted-2);
  margin-top: var(--space-2);
}
@media (max-width: 720px) {
  .desafios-stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-5) var(--space-4); }
}

/* Tres pilares debajo del hero — comunican valor antes de las tarjetas */
.desafios-hero__pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 26px);
  max-width: 980px;
  margin: var(--section-head-gap) auto 0;
}
.desafios-hero__pillar {
  background: rgba(18, 18, 18, 0.55);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 22px 22px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.32s var(--ease-out), transform 0.32s var(--ease-out);
}
.desafios-hero__pillar:hover { border-color: var(--c-cyan); transform: translateY(-3px); }
.desafios-hero__pillar-num {
  display: inline-block;
  font-family: var(--f-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--c-cyan);
  margin-bottom: 10px;
}
.desafios-hero__pillar h3 {
  font-family: var(--f-display);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.desafios-hero__pillar p { font-size: 13px; color: var(--c-muted); line-height: 1.55; }

@media (max-width: 720px) {
  .desafios-hero__pillars { grid-template-columns: 1fr; }
}

/* ============================================
   GRID DE DESAFÍOS — tarjetas premium
   ============================================ */
.desafios-grid-section { padding-top: var(--section-pad-sm); padding-bottom: var(--section-pad-sm); }
.desafios-grid-section__head { text-align: center; margin-bottom: var(--section-head-gap); }
.desafios-grid-section__head .section__title {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  letter-spacing: -0.015em;
}
.desafios-grid-section__note {
  max-width: 620px;
  margin: var(--space-4) auto 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--c-muted);
}

.desafios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(20px, 2.4vw, 32px);
  max-width: 1180px;
  margin: 0 auto;
}

.challenge-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px;
  background: rgba(18, 18, 18, 0.7);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  isolation: isolate;
  /* Microinteracción premium — lift + tinte cyan + box-shadow del color de marca */
  transition:
    transform 0.4s var(--ease-out),
    border-color 0.32s var(--ease-out),
    background 0.32s var(--ease-out),
    box-shadow 0.4s var(--ease-out);
}
.challenge-card::before {
  /* Aura interior que aparece al hover, palette-only */
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), transparent 55%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  z-index: -1;
  pointer-events: none;
}
.challenge-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-cyan);
  background: rgba(18, 18, 18, 0.82);
  box-shadow:
    0 28px 60px -24px rgba(0, 229, 255, 0.4),
    inset 0 0 0 1px rgba(0, 229, 255, 0.16);
}
.challenge-card:hover::before { opacity: 1; }

.challenge-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 56px;
}
.challenge-card__sponsor {
  display: inline-flex;
  align-items: center;
  height: 44px;
  max-width: 65%;
}
.challenge-card__sponsor img {
  max-height: 44px;
  width: auto;
  filter: grayscale(1) brightness(2);
  opacity: 0.9;
  transition: filter 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.challenge-card__sponsor span {
  font-family: var(--f-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-muted-2);
}
.challenge-card:hover .challenge-card__sponsor img { filter: grayscale(0) brightness(1); opacity: 1; }

/* Badge de estado — Abierto = cyan, Próximamente = ámbar suave (palette pink soft),
   Cerrado = gris muted. Sin íconos. */
.challenge-card__badge {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.challenge-card__badge--abierto {
  color: var(--c-cyan);
  background: var(--c-cyan-soft);
  border: 1px solid rgba(0, 229, 255, 0.32);
}
.challenge-card__badge--proximamente {
  color: var(--c-pink);
  background: rgba(234, 64, 118, 0.10);
  border: 1px solid rgba(234, 64, 118, 0.32);
}
.challenge-card__badge--cerrado {
  color: var(--c-muted-2);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--c-line);
}

.challenge-card__title {
  font-family: var(--f-display);
  font-size: clamp(20px, 2.2vw, 24px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.18;
  color: var(--c-white);
}
.challenge-card__slogan {
  font-size: 15px;
  line-height: 1.45;
  color: var(--c-white);
  opacity: 0.92;
  font-weight: 500;
}
.challenge-card__desc { font-size: 13.5px; line-height: 1.6; color: var(--c-muted); }

.challenge-card__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px dashed var(--c-line);
  border-bottom: 1px dashed var(--c-line);
  margin-top: auto;
}
.challenge-card__meta-item { display: flex; flex-direction: column; gap: 4px; }
.challenge-card__meta-label {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted-2);
  font-weight: 600;
}
.challenge-card__meta-value {
  font-family: var(--f-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: -0.005em;
}

.challenge-card__cta {
  /* Botón de tamaño ESTÁNDAR del sitio: el padding y el alto los pone .btn
     (core.css). Antes era `width:100%; max-width:340px; min-height:48px`, que
     dentro de la tarjeta se leía como una barra sobredimensionada.
     `align-self: flex-start` lo deja al ancho de su contenido y alineado con
     el texto de la tarjeta; `margin-top: auto` lo pega abajo para que todas
     las tarjetas de la fila tengan el botón a la misma altura. */
  align-self: flex-start;
  width: auto;
  margin-top: auto;
}
.challenge-card__cta svg { transition: transform 0.3s var(--ease-out); }
.challenge-card:hover .challenge-card__cta svg { transform: translateX(3px); }

/* ============================================
   AVISO TRANSVERSAL — el requisito IA aplica a todos
   ============================================ */
/* Retos aún no anunciados: misma tarjeta, en tono más bajo y sin botón —
   comunica "esto viene" sin competir con las convocatorias abiertas. */
.challenge-card--proximamente {
  background: rgba(18, 18, 18, 0.45);
  border-style: dashed;
}
.challenge-card--proximamente:hover {
  transform: none;
  border-color: var(--c-line-strong);
  background: rgba(18, 18, 18, 0.55);
  box-shadow: none;
}
.challenge-card--proximamente:hover::before { opacity: 0; }
.challenge-card--proximamente .challenge-card__title { color: var(--c-muted); }
.challenge-card__soon {
  margin-top: auto;
  padding-top: var(--space-2);
  font-family: var(--f-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted-2);
}

.desafios-ai-note { padding-top: 0; padding-bottom: var(--section-pad-sm); }
.desafios-ai-note__card {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 44px) clamp(28px, 4vw, 48px);
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.10), transparent 60%),
    rgba(18, 18, 18, 0.75);
  border: 1px solid rgba(0, 229, 255, 0.28);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  position: relative;
  overflow: hidden;
}
.desafios-ai-note__card::before {
  content: "";
  position: absolute;
  top: 0; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-cyan), transparent);
}
.desafios-ai-note__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
  background: var(--c-cyan-soft);
  border: 1px solid rgba(0, 229, 255, 0.32);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.desafios-ai-note__card h2 {
  font-family: var(--f-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 14px;
}
.desafios-ai-note__card p { color: var(--c-muted); font-size: 15px; line-height: 1.62; max-width: 700px; }

@media (max-width: 640px) {
  .challenge-card { padding: 22px; }
  .challenge-card__meta { grid-template-columns: 1fr; }
}

/* Banner de confirmación de voto (redirección del backend con ?voto=). */
.desafios-vote-banner {
  margin: 0 0 24px;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--c-white);
  background: rgba(234, 64, 118, 0.08);
  border: 1px solid rgba(234, 64, 118, 0.35);
  border-left: 3px solid var(--c-pink);
  border-radius: var(--radius-sm);
}
.desafios-vote-banner--ok {
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.35);
  border-left-color: var(--c-cyan);
}

/* ============================================
   PUENTE — cierra "crear" y abre "exponer".
   Bloque angosto y centrado: se lee como una
   transición, no como una sección más.
   ============================================ */
.desafios-bridge { padding-top: var(--section-pad-sm); padding-bottom: 0; }
.desafios-bridge__body {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  padding-top: var(--space-7);
}
/* Hilo vertical que conecta visualmente con la sección anterior */
.desafios-bridge__body::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  width: 1px; height: var(--space-6);
  background: linear-gradient(180deg, transparent, var(--c-cyan));
  opacity: 0.55;
}
.desafios-bridge__body h2 {
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.16;
  margin: var(--space-4) 0 var(--space-3);
}
.desafios-bridge__body p {
  color: var(--c-muted);
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.62;
}

/* La galería (componente compartido) trae un padding-bottom grande pensado
   para cuando era lo último de la antigua /galeria. Acá va a mitad de página, así que se
   ajusta al ritmo del resto de secciones. */
[data-page="desafios"] .exhibit {
  padding-top: var(--space-7);
  padding-bottom: var(--section-pad-sm);
}

/* ============================================
   BUZÓN "MEDELLÍN PREGUNTA" — la otra
   experiencia ciudadana del evento.
   ============================================ */
.desafios-buzon { padding-top: var(--section-pad-sm); padding-bottom: var(--section-pad-sm); }
.desafios-buzon__card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding: clamp(32px, 4.5vw, 56px);
  background:
    radial-gradient(circle at 0% 0%, rgba(234, 64, 118, 0.10), transparent 55%),
    rgba(18, 18, 18, 0.7);
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  position: relative;
  overflow: hidden;
}
.desafios-buzon__card::before {
  content: "";
  position: absolute;
  top: 0; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-pink), var(--c-cyan), transparent);
}
.desafios-buzon__body h2 {
  font-family: var(--f-display);
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.16;
  margin: var(--space-3) 0 var(--space-4);
}
.desafios-buzon__body p {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.62;
}
.desafios-buzon__body p + p { margin-top: var(--space-3); }
.desafios-buzon__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.desafios-buzon__list li {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--c-muted);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-6);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  position: relative;
}
.desafios-buzon__list li::before {
  content: "";
  position: absolute;
  left: var(--space-4);
  /* alineado al centro de la primera línea (padding + media línea) */
  top: calc(var(--space-4) + 0.45em);
  width: 8px; height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-pink));
}
.desafios-buzon__list strong {
  color: var(--c-white);
  font-family: var(--f-display);
  font-weight: 600;
}

@media (max-width: 880px) {
  .desafios-buzon__card { grid-template-columns: 1fr; }
}

/* ============================================
   EL LEGADO — Biblioteca Expl-AI-n. Cierra el
   arco: la creación ciudadana sigue viva.
   ============================================ */
.desafios-legado { padding-top: var(--section-pad-sm); padding-bottom: var(--section-pad-sm); }
.desafios-legado__head {
  max-width: 780px;
  margin: 0 auto var(--section-head-gap);
  text-align: center;
}
.desafios-legado__head h2 {
  font-family: var(--f-display);
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.018em;
  line-height: 1.14;
  margin: var(--space-4) 0 var(--space-4);
}
.desafios-legado__head p {
  color: var(--c-muted);
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.62;
}
.desafios-legado__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(24px, 3vw, 44px);
  align-items: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 44px);
  background:
    radial-gradient(circle at 100% 0%, rgba(0, 229, 255, 0.09), transparent 55%),
    rgba(18, 18, 18, 0.62);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.desafios-legado__stats {
  display: grid;
  gap: var(--space-6);
}
.desafios-legado__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.desafios-legado__list li {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--c-muted);
  padding-left: var(--space-5);
  position: relative;
}
.desafios-legado__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.5em;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-pink));
}
.desafios-legado__list strong {
  color: var(--c-white);
  font-family: var(--f-display);
  font-weight: 600;
}
.desafios-legado__cta { text-align: center; margin-top: var(--section-head-gap); }

@media (max-width: 880px) {
  .desafios-legado__grid { grid-template-columns: 1fr; }
  .desafios-legado__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
}
@media (max-width: 480px) {
  .desafios-legado__stats { grid-template-columns: 1fr; gap: var(--space-5); }
}