*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,Helvetica,sans-serif;background-color:#f4f4f9;text-align:center;padding:50px}h1{font-size:3rem;margin-bottom:30px;color:#333}#game-container{display:flex;justify-content:center;margin-bottom:30px}.color-btn{width:100px;height:100px;border-radius:10px;margin:10px;cursor:pointer;box-shadow:0 4px 10px #0003;transition:transform .2s}#green{background-color:green}#red{background-color:red}#yellow{background-color:#ff0}#blue{background-color:#00f}.color-btn.active{transform:scale(1.1)}#game-status{margin-top:20px;font-size:1.2rem;color:#333}#start-btn{margin-top:20px;padding:10px 20px;font-size:1.2rem;background-color:#4caf50;color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .3s}#start-btn:hover{background-color:#45a049}#status{font-weight:700}#level-message{font-size:24px;font-weight:700;color:green;text-align:center;margin-top:20px;opacity:0;transition:opacity .5s ease-in-out;display:none}#level-message.show{opacity:1;display:block}.my-text{font-size:1.5rem;margin-top:20px;color:#333;opacity:0;transition:opacity .5s ease-in-out;display:none}.my-text.show{opacity:1;display:block;transition:opacity .5s ease-in-out}