.tracker-item{background:#fff;padding:15px;border-radius:10px;margin:10px 0;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 4px rgba(0,0,0,.1)}.tracker-label{font-weight:700;color:#16a085;flex:1}.tracker-checkbox{width:30px;height:30px;cursor:pointer;accent-color:#27ae60}.memory-card{background:#fff;padding:20px;border-radius:10px;font-size:1.2em;cursor:pointer;transition:all .3s ease;min-height:60px;display:flex;align-items:center;justify-content:center;font-weight:700;color:#2c3e50;box-shadow:0 4px 6px rgba(0,0,0,.1)}.memory-card:hover{transform:translateY(-3px);box-shadow:0 6px 12px rgba(0,0,0,.15)}.memory-card.flipped{background:#27ae60;color:white}.memory-card.matched{background:#16a085;color:white;cursor:default}