css3 loading

/* CSS3 Loading Animation Example */

@keyframes spinner {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loader {
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #3498db; /* Blue */
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spinner 2s linear infinite;
}

/* Explanation:
- The @keyframes rule defines the animation sequence.
- The .loader class styles a div to look like a spinning circle.
- The border properties create a circular shape with a colored top border.
- The animation property applies the spinner keyframes to the loader, making it rotate infinitely.
*/