body{
    text-align: center;
    background-size: cover;
    background-position: center;
    background-image: Url("sound-images/theme3.jpg");
}
.btn{
    height: 200px;
    width: 200px ;
    border-radius: 20%;
    border: 10px solid black;
    margin:2.5rem;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}
.btn-container{
    display: flex;
    justify-content: center;
    font-size: 2rem;
    color:black;
}

.leopard{
    background-image: url("sound-images/leopard.jpg");
}
.tiger{
    background-image: url("sound-images/tiger.avif");
}

.lion{
   background-image: url("sound-images/lion.avif");
}
.cheetah{
    background-image: url("sound-images/cheetah.jpg");
}
.flash{
    background-color: white;
}
.userflash{
    background-color: green;
} 
.wrongflash {
    background-color: red;
}


/* Overlay for Flash Effect */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: white; /* Adjust as needed */
    opacity: 0;
    transition: opacity 0.25s ease;
}

/* Flash Effect */
.flash .overlay {
    opacity: 0.7;
}

.userflash .overlay {
    background-color: green;
    opacity: 0.7;
}

.wrongflash .overlay {
    background-color: red;
    opacity: 0.7;
}

/* Popup styles */
.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: solid black 50%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
}

.popup-content {
    background-color: rgb(188, 236, 196);
    padding: 20px;
    text-align: center;
    width: 80%;
    max-width: 500px;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 50px;
    cursor: pointer;
}

@media (max-width: 600px){
    .btn{
        height: 30vw;
        width: 30vw;
        margin: 0.7rem;
    }

    h1{
        font-size: 1.8rem;
    }

    h2{
        font-size: 1.2rem;
    }
}