body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #333; /* Dark background */
  margin: 0;
}
button {
    background-color: #fff;
    position: relative;
    list-style: none;
    width: 60px;
    height: 60px;
    border-radius: 60px;
    cursor: pointer;
    box-shadow: 0px 10px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.5s;
    border: none;
  }
  
  button:active {
    scale: 1.2;
  }
  
  button:hover {
    width: 180px;
    box-shadow: 0px 10px 25px rgba(0, 0, 0, 0);
  }
  
  button::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50px;
    background: linear-gradient(45deg, var(--i), var(--j));
    opacity: 0;
    transition: 0.5s;
  }
  
  button:hover::before {
    opacity: 1;
  }
  
  button::after {
    content: '';
    position: absolute;
    top: 10px;
    width: 100%;
    height: 100%;
    border-radius: 60px;
    background: linear-gradient(45deg, var(--i), var(--j));
    filter: blur(15px);
    transition: 0.5s;
    z-index: -1;
    opacity: 0;
  }
  
  button:hover::after {
    opacity: 0.5;
  }
  
  button svg {
    color: #777;
    width: auto;
    height: 30px;
    transition: 0.5s;
    transition-delay: 0.25s;
  }
  
  button:hover svg {
    transform: scale(0);
    color: #fff;
    transition-delay: 0s;
  }
  
  button span {
    position: absolute;
  }
  
  button .title {
    color: #fff;
    font-size: 1.3em;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transform: scale(0);
    transition: 0.5s;
    transition-delay: 0s;
    font-weight: 600;
  }
  
  button:hover .title {
    transform: scale(1);
    transition-delay: 0.25s;
  }