@keyframes skeleton-shimmer{0%{opacity:1}50%{opacity:.4}to{opacity:1}}.challenges-loading__button,.challenges-loading__switch,.challenges-loading__column-title,.challenges-loading__column-sort,.challenges-loading__mobile-tabs,.challenges-loading__mobile-card{background:var(--bg-2);border-radius:var(--radius-sm);animation:1.6s ease-in-out infinite skeleton-shimmer}.challenges-loading__header{margin-bottom:var(--spacing-md);justify-content:space-between;align-items:center;gap:var(--spacing-md);display:flex}.challenges-loading__button{border-radius:var(--radius-md);flex-shrink:0;width:120px;height:36px}.challenges-loading__filter{margin-bottom:var(--spacing-lg)}.challenges-loading__switch{border-radius:var(--radius-full);width:160px;height:24px}.challenges-loading__kanban{gap:var(--spacing-lg);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}@media (max-width:767px){.challenges-loading__kanban{display:none}}.challenges-loading__column{gap:var(--spacing-md);flex-direction:column;min-width:0;display:flex}.challenges-loading__column-title{width:60px;height:18px}.challenges-loading__column-sort{border-radius:var(--radius-md);width:100%;height:36px}.challenges-loading__column-list{margin:0;padding:0;list-style:none}.challenges-loading__mobile-list{display:none}@media (max-width:767px){.challenges-loading__mobile-list{gap:var(--spacing-md);flex-direction:column;display:flex}}.challenges-loading__mobile-tabs{border-radius:var(--radius-md);width:100%;height:36px}.challenges-loading__mobile-card{border-radius:var(--radius-md);width:100%;height:110px}