body {
    background-color: #121212;
    color: white;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 2 buttons per row */
    gap: 15px;
    padding: 20px;
}

.sound-btn {
    width: 140px;
    height: 140px;
    background-color: #333; /* Fallback color */

    /* Image scaling properties */
    background-size: cover;       /* Scales image to fill the button */
    background-position: center;  /* Centers the image */
    background-repeat: no-repeat;

    border: 2px solid #444;
    border-radius: 15px;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: transform 0.1s ease;
}

.sound-btn:active {
    transform: scale(0.92); /* Slight shrink effect when tapped */
    filter: brightness(0.8); /* Darkens the image slightly on tap */
}