/* Desafios */
.challenges-list { display: flex; flex-direction: column; gap: 1rem; }
.challenge-item {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.challenge-item:hover { border-color: var(--border); }
.challenge-item-header { padding: 1.25rem 1.25rem 0; }
.challenge-item-body { padding: 0 1.25rem 1.25rem; }
.challenge-duration {
  display: inline-flex; align-items: center; gap: 0.3rem;
  background: var(--gold-muted); color: var(--gold);
  padding: 0.25rem 0.625rem; border-radius: 100px;
  font-size: 0.75rem; font-weight: 700;
  margin-bottom: 0.625rem;
}
.challenge-item-title { font-size: 1.05rem; font-weight: 800; margin-bottom: 0.375rem; }
.challenge-item-desc { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1rem; }
.challenge-item-footer { display: flex; align-items: center; justify-content: space-between; }
.challenge-points { font-size: 0.8rem; color: var(--gold); font-weight: 600; }
.challenge-status-badge {
  padding: 0.3rem 0.75rem; border-radius: 100px; font-size: 0.75rem; font-weight: 700;
}
.status-active { background: rgba(76,175,80,0.15); color: var(--success); }
.status-completed { background: var(--gold-muted); color: var(--gold); }
.status-abandoned { background: rgba(244,67,54,0.1); color: var(--danger); }

.day-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 0.375rem; margin-top: 1rem; }
.day-cell {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  background: var(--surface-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.day-cell.done { background: var(--gold-muted); color: var(--gold); }
.day-cell.current { border: 2px solid var(--gold); }
.day-cell.locked { opacity: 0.4; cursor: not-allowed; }

.ranking-list { display: flex; flex-direction: column; gap: 0.5rem; }
.ranking-item { display: flex; align-items: center; gap: 0.875rem; padding: 0.875rem; background: var(--surface); border-radius: var(--radius-md); }
.ranking-pos { font-size: 1.25rem; font-weight: 800; color: var(--text-muted); min-width: 32px; text-align: center; }
.ranking-pos.gold { color: var(--gold); }
.ranking-pos.silver { color: #C0C0C0; }
.ranking-pos.bronze { color: #CD7F32; }
.ranking-info { flex: 1; }
.ranking-name { font-weight: 600; font-size: 0.9rem; }
.ranking-progress { font-size: 0.8rem; color: var(--text-muted); }
.ranking-pts { font-weight: 700; color: var(--gold); font-size: 0.85rem; }