.loader-lines {
  position: relative;
  color: transparent !important; /* hide the text but preserve space */
  overflow:hidden;
}

  .loader-lines::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* your loader style */
    background: linear-gradient(90deg, #3498db, #ffffff00);
    background-size: 200% 100%;
    animation: slide 0.8s linear infinite;
    border-radius: 4px;

  }

@keyframes slide {
  from {
    background-position: 200% 0;
  }

  to {
    background-position: -200% 0;
  }
}