Cilindru Rubik cu operatii matematice din lemn si cifre

.age-tabs{ display:flex; gap:8px; margin-bottom:14px; flex-wrap:wrap; } .age-btn{ border:1px solid #ddd; background:#f5f5f5; padding:8px 14px; cursor:pointer; border-radius:6px; font-size:13px; transition:all .2s; } .age-btn:hover{ background:#ececec; } .age-btn.active{ background:#3bb54a; color:#fff; border-color:#3bb54a; } .age-content{ display:none; } .age-content.active{ display:block; } function showAge(id){ document.querySelectorAll('.age-content').forEach(el=>el.classList.remove('active')); document.querySelectorAll('.age-btn').forEach(el=>el.classList.remove('active')); document.getElementById(id).classList.add('active'); event.target.classList.add('active'); }