body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: aliceblue;
    font-family: cursive;
}

.btn {
    background-color: rgb(255, 171, 162);
    padding: 20px 40px;
    border-radius: 5px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.6);
    text-decoration: none;
    color: black;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    background-color: orangered;
    width: 0px;
    height: 0px;
    top: var(--yPos);
    left: var(--xPos);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    transition: width 0.5s, height 0.5s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn > span {
    position: relative;
    z-index: 99;
}