body {
    text-align: center;
    background-color: #111;
    color: white;
    font-family: Arial, sans-serif;
}

h1 {
    margin-top: 20px;
}

.btn {
    height: 150px;
    width: 150px;
    border-radius: 20%;
    border: none;
    margin: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}


.btn:hover {
    transform: scale(1.05);
    opacity: 0.9;
}


.btn-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 30px;
}


/* Colors */
.yellow {
    background-color: rgb(245, 245, 61);
}

.green {
    background-color: rgb(35, 226, 35);
}

.red {
    background-color: rgb(204, 42, 42);
}

.purple {
    background-color: rgb(224, 33, 224);
}

/* Flash effects */
.flash {
    background-color: white ;
}

.userFlash {
    background-color: lightgreen ;
}