.scroll-up-arrow {
    position: fixed;
    bottom: 26px;
    right: 26px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid #111;
    cursor: pointer;
    z-index: 99999;
  
    display: flex;
    align-items: center;
    justify-content: center;
  
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, transform .25s ease;
    transform: translateY(12px);
  }
  
  /* شكل السهم */
  .scroll-up-arrow::before {
    content: "";
    width: 14px;
    height: 14px;
    border-left: 2px solid #111;
    border-top: 2px solid #111;
    transform: rotate(45deg);
    margin-top: 6px;
  }
  
  /* الظهور */
  .scroll-up-arrow.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  /* hover */
  .scroll-up-arrow:hover {
    background: #111;
  }
  .scroll-up-arrow:hover::before {
    border-color: #fff;
  }