body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 90vh;
    background-color: #f4f4f4;
    font-family: sans-serif;
}

.ui-container {
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 500px;
    width: 90%;
}

h2 {
    color: #333;
    margin-bottom: 10px;
}

p {
    color: #666;
    margin-bottom: 20px;
}

.button-group {
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.ui-button {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.ui-button:active {
    transform: scale(0.95);
}

.ui-button[data-sound="basic-click"] { background-color: #007bff; }
.ui-button[data-sound="basic-click"]:hover { background-color: #0056b3; }

.ui-button[data-sound="soft-click"] { background-color: #17a2b8; }
.ui-button[data-sound="soft-click"]:hover { background-color: #117a8b; }

.ui-button.toggle { background-color: #6c757d; }
.ui-button.toggle:hover { background-color: #545b62; }

.ui-button.notify { background-color: #ffc107; color: #333;}
.ui-button.notify:hover { background-color: #e0a800; }

.ui-button.success { background-color: #28a745; }
.ui-button.success:hover { background-color: #1e7e34; }

.ui-button.error { background-color: #dc3545; }
.ui-button.error:hover { background-color: #b02a37; }

.ui-button.warning { background-color: #fd7e14; }
.ui-button.warning:hover { background-color: #c66511; }

#status {
    margin-top: 20px;
    font-size: 0.85rem;
    color: #888;
    min-height: 1.2em;
}