.wa-icon {
    width: 30px;
    height: 30px;
    fill: white;
}            


/* Variant 13: Ripple Effect */
.btn-13 {
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
}
.btn-13::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.5s;
}
.btn-13:hover::after {
    transform: scale(2);
}