body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

#panel {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    margin: auto;
}

h1 {
    font-size: 24px;
}

#channel-list {
    list-style-type: none;
    padding: 0;
}

#channel-list li {
    padding: 8px;
    border-bottom: 1px solid #ddd;
}