.trail {
    position: fixed;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(75, 102, 246, 0.8);
    border-radius: 50%;
    pointer-events: none;
    transition: transform 0.1s ease, opacity 0.2s ease, background-color 0.3s ease;
    opacity: 0.8;
    background-color: transparent;
    z-index: 999;
  }