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.rank-medal{text-align:center;flex-shrink:0;width:2rem;font-size:1.2rem}.leaderboard-item .user-info{flex:1;min-width:0}.leaderboard-item .user-name{color:#1a1a1a;white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.leaderboard-item .user-streak{color:#f97316;font-size:.8rem}.leaderboard-item .user-xp{color:var(--color-red);flex-shrink:0;font-weight:700}.leaderboard-empty{color:var(--color-gray);text-align:center;padding:1rem 0;font-weight:500}.account-challenge-card{margin-top:1.5rem}.account-challenge-stats{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1rem;margin:1.25rem 0;display:grid}.account-challenge-stat{text-align:center;background:var(--color-light-gray);border-radius:15px;padding:1rem}.account-challenge-stat strong{color:var(--color-red);margin-bottom:.25rem;font-size:1.5rem;display:block}.account-challenge-stat span{color:var(--color-gray);font-size:.85rem;font-weight:600}.account-challenge-empty{color:var(--color-gray);text-align:center;margin:1rem 0;font-weight:500}.account-challenge-actions{margin-top:1rem}@media (width<=768px){.challenge-grid{grid-template-columns:1fr}.challenge-sidebar{position:static}}