body {
            background-color: black;
            color: rgb(234, 180, 87);
            text-align: center;
            font-family: Arial, sans-serif;
        }
        .led-container {
            margin-top: 20px;
        }
        .led {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: inline-block;
            margin: 10px;
            cursor: pointer;
            border: 2px solid white;
        }
        #selected-led {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            margin: 20px auto;
            transition: opacity 0.3s, box-shadow 0.3s;
        }
        input[type="range"] {
            width: 80%;
            margin: 20px 0;
        }