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(width<=600px){.lobby-card-header,.lobby-game-row{padding:.6rem .65rem}.lobby-col.col-gear{margin-left:.5rem}.lobby-col.col-time{flex:0 0 8ch;width:8ch;min-width:8ch;max-width:8ch}}.lobby-gear-btn{cursor:pointer;color:var(--text-secondary);border-radius:var(--radius-sm);background:0 0;border:none;justify-content:center;align-items:center;padding:.25rem;transition:color .15s,transform .15s;display:inline-flex;position:relative}.lobby-gear-btn:hover{color:var(--accent-gold);transform:rotate(20deg)}.filter-active-dot{background-color:var(--accent-gold);border-radius:50%;width:6px;height:6px;position:absolute;top:1px;right:1px}.lobby-header-filter-bar{justify-content:space-between;align-items:center;width:100%;display:flex}.lobby-back-btn,.lobby-done-btn{background:var(--bg-tertiary);border:1px solid var(--border-subtle);color:var(--text-primary);border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:.35rem;padding:.3rem 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#22c55e4d}.lobby-empty-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:3.5rem 1.5rem;display:flex}.empty-icon-wrap{background-color:var(--bg-tertiary);border:1px solid var(--border-subtle);width:52px;height:52px;color:var(--text-muted);border-radius:50%;justify-content:center;align-items:center;margin-bottom:1rem;display:flex}.empty-title{color:var(--text-primary);margin-bottom:.4rem;font-size:1.05rem;font-weight:600}.empty-description{color:var(--text-secondary);max-width:320px;margin:0 auto 1.25rem;font-size:.85rem;line-height:1.45}.lobby-filter-panel{flex-direction:column;gap:1.25rem;padding:1.25rem 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