/* ============================================
   CHALLENGE / TRUST SECTION
   ============================================ */

.challenge {
  position: relative;
  overflow: hidden;
}

.challenge__content {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto;
  margin-bottom: var(--space-16);
}

.challenge__content h2 {
  margin-bottom: var(--space-6);
}

.challenge__content p {
  font-size: var(--font-size-md);
  max-width: 640px;
  margin: 0 auto;
}

.challenge__solution {
  font-size: var(--font-size-md);
  color: var(--text-primary) !important;
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-8) !important;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

/* ---- Data flow visual ---- */
.challenge__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  max-width: 1000px;
  margin: 0 auto;
}

.challenge__sources {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  flex-shrink: 0;
}

.source-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  min-width: 150px;
  transition:
    border-color var(--transition-base),
    transform var(--transition-base);
}

.source-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.source-card__icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(74, 124, 80, 0.06);
  color: var(--accent-green);
  flex-shrink: 0;
}

.source-card__icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--accent-green);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.source-card__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

/* Arrow / connector */
.challenge__connector {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--accent-green-dim);
}

.challenge__connector svg {
  width: 80px;
  height: 24px;
}

/* Central platform element */
.challenge__platform {
  background: var(--bg-surface);
  border: 1px solid var(--accent-green-dim);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-10);
  text-align: center;
  flex-shrink: 0;
  box-shadow: 0 0 40px var(--accent-green-glow);
}

.challenge__platform-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-3);
}

.challenge__platform-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.challenge__platform-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  letter-spacing: 0.04em;
}

/* ---- Responsive ---- */
@media (max-width: 1199px) {
  .challenge__flow {
    flex-direction: column;
    gap: var(--space-6);
  }

  .challenge__connector {
    transform: rotate(90deg);
  }

  .challenge__connector svg {
    width: 60px;
  }
}

@media (max-width: 767px) {
  .challenge__sources {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .source-card {
    min-width: 0;
    padding: var(--space-3) var(--space-4);
  }
}

@media (max-width: 479px) {
  .challenge__sources {
    grid-template-columns: 1fr;
  }
}