/* Mobile systems may render Unicode arrows as colorful emoji. Desktop keeps
   the original characters; narrow screens receive matching CSS line icons. */
@media (max-width: 900px) {
  .line-arrow {
    position: relative;
    display: inline-block;
    flex: 0 0 auto;
    width: 12px;
    height: 12px;
    margin-left: 12px;
    overflow: hidden;
    font-size: 0;
    text-indent: -9999px;
    transform: rotate(-45deg);
  }

  .line-arrow::before {
    position: absolute;
    content: "";
    left: 1px;
    top: 5px;
    width: 10px;
    height: 1px;
    background: currentColor;
    transform-origin: center;
  }

  .line-arrow::after {
    position: absolute;
    content: "";
    right: 0;
    top: 2px;
    width: 6px;
    height: 6px;
    border-top: 1px solid currentColor;
    border-right: 1px solid currentColor;
  }

  .line-arrow-down { transform: rotate(90deg); }
  .line-arrow-down-right { transform: rotate(45deg); }

  .slider-btn {
    position: relative;
    font-size: 0;
    text-indent: -9999px;
  }

  .slider-btn::before,
  .slider-btn::after {
    position: absolute;
    content: "";
  }

  .slider-btn::before {
    left: 12px;
    top: 18px;
    width: 13px;
    height: 1px;
    background: currentColor;
  }

  .slider-btn::after {
    top: 14px;
    width: 7px;
    height: 7px;
    border-top: 1px solid currentColor;
    border-left: 1px solid currentColor;
  }

  .slider-btn[data-phone-prev]::after {
    left: 12px;
    transform: rotate(-45deg);
  }

  .slider-btn[data-phone-next]::after {
    right: 12px;
    transform: rotate(135deg);
  }
}