:root {
  --challenges-accent-soft: rgba(37, 99, 235, 0.06);
}

.challenges-section {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

.challenges-section--alt {
  background: radial-gradient(circle at top left, rgba(168, 85, 247, 0.06), transparent 55%), var(--color-bg);
}

.challenges-section--steps {
  background-color: #ffffff;
}

.challenges-section--rewards {
  background: linear-gradient(135deg, #ffffff, #f3f4ff);
}

.challenges-section--stats {
  background-color: #ffffff;
}

.challenges-section--leaderboard {
  background: radial-gradient(circle at bottom right, rgba(37, 99, 235, 0.05), transparent 60%), var(--color-bg);
}

.challenges-section--cta {
  background: linear-gradient(135deg, var(--color-primary-soft), #f9f5ff);
}

.challenges-hero {
  padding-top: var(--space-40);
  padding-bottom: var(--space-32);
}

.challenges-hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--space-16);
}

.challenges-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.challenges-hero__visual {
  justify-self: center;
}

.challenges-hero__grid-preview {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, #ffffff, #e0ecff);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 260px;
}

.challenges-hero__grid-row {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.challenges-hero__badge {
  align-self: flex-end;
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-yellow);
  color: var(--color-accent-navy);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.challenges-intro {
  align-items: flex-start;
  gap: var(--space-16);
}

.challenges-intro__highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.challenges-intro__list {
  padding: var(--space-6);
}

.challenges-bullet-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.challenges-bullet-list li {
  position: relative;
  padding-left: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.challenges-bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
}

.challenges-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
}

.challenges-link::after {
  content: "→";
  font-size: 0.85em;
}

.challenges-section__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
}

.challenges-cards-layout {
  align-items: center;
  gap: var(--space-16);
}

.challenges-image-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background-color: #000000;
}

.challenges-image-frame img {
  width: 100%;
  height: auto;
}

.challenges-card-explainer {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.challenges-card-explainer__item {
  padding: var(--space-6);
}

.challenges-mission-card {
  min-height: 100%;
}

.challenges-steps-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.challenges-steps-list--compact {
  gap: var(--space-4);
}

.challenges-step-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.challenges-step-item__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.challenges-step-number {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-green));
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.challenges-rewards-layout {
  align-items: center;
  gap: var(--space-16);
}

.challenges-rewards-grid {
  align-items: stretch;
}

.challenges-protips-grid {
  align-items: stretch;
}

.challenges-protip-card {
  padding: var(--space-6);
}

.challenges-featured-layout {
  align-items: center;
  gap: var(--space-16);
}

.challenges-featured-details {
  padding: var(--space-6);
}

.challenges-stats-grid {
  align-items: stretch;
}

.challenges-stat-card {
  padding: var(--space-6);
}

.challenges-bar-chart {
  position: relative;
  width: 100%;
  height: 12px;
  border-radius: var(--radius-pill);
  background-color: var(--gray-100);
  overflow: hidden;
  margin-bottom: var(--space-3);
}

.challenges-bar {
  position: absolute;
  inset: 0;
  width: var(--bar-fill);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-purple));
  transition: width var(--transition-slow);
}

.challenges-stat-value {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.challenges-stat-note {
  font-size: var(--font-size-xs);
}

.challenges-leaderboard-grid {
  align-items: stretch;
}

.challenges-leaderboard-card {
  padding: var(--space-6);
}

.challenges-leaderboard-list {
  list-style: none;
  padding-left: 0;
  margin: 0 0 var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.challenges-leaderboard-list li {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
}

.challenges-leader-name {
  font-weight: 600;
  color: var(--color-accent-navy);
}

.challenges-leaderboard-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.challenges-archive-layout {
  align-items: flex-start;
  gap: var(--space-16);
}

.challenges-archive-card {
  padding: var(--space-6);
}

.challenges-archive-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.challenges-cta-actions {
  justify-content: center;
  margin-top: var(--space-8);
}

@media (max-width: 960px) {
  .challenges-hero__layout {
    grid-template-columns: 1fr;
  }

  .challenges-section__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .challenges-hero__visual {
    order: -1;
  }
}

@media (max-width: 640px) {
  .challenges-hero {
    padding-top: var(--space-32);
  }

  .challenges-section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }

  .challenges-hero__actions,
  .challenges-cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .challenges-step-item {
    padding: var(--space-6);
  }
}