.top-btn {
  border-radius: 28px;
  width: 55px;
  height: 55px;
  background-color: var(--green-color);
}

.top-btn img {
    width: 25px;
    height: 25px;

    object-fit: contain;
}

@media (max-width: 430px) {
    .top-btn {
        width: 40px;
        height: 40px;
    }

    .top-btn img {
        width: 20px;
        height: 20px;
    }
}