body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.warning-notice {
    color: #dc3545; /* Red color for warning */
    font-weight: bold;
    margin-bottom: 20px;
    text-align: center;
}

.controls {
    margin-bottom: 20px;
    display: flex; 
    gap: 10px; 
}

.control-button { 
    padding: 10px 20px;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: background-color 0.2s ease;
    text-align: center;
}

.stop-button {
    background-color: #dc3545;
}

.stop-button:hover {
    background-color: #c82333;
}

.stop-button:active {
    background-color: #bd2130;
}

#play-all-button { 
    background-color: #28a745; 
}

#play-all-button:hover {
    background-color: #218838;
}

#play-all-button:active {
    background-color: #1e7e34;
}

.sound-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    max-width: 800px;
    width: 100%;
}

button { 
    padding: 20px;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    transition: background-color 0.2s ease;
    text-align: center;
}

button:hover {
    background-color: #0056b3;
}

button:active {
    background-color: #004085;
}