.btn-53,
.btn-53 *,
.btn-53 :after,
.btn-53 :before,
.btn-53:after,
.btn-53:before {
  border: 0 solid;
  box-sizing: border-box;
}

.btn-53 {
  -webkit-tap-highlight-color: transparent;
  -webkit-appearance: none;
  background-color: rgba(255, 255, 255, 0.1); /* Semi-transparent background */
  backdrop-filter: blur(10px); /* Blur effect for glassmorphism */
  border: 1px solid rgba(255, 255, 255, 0.3); /* Light border for depth */
  box-shadow: 0 0 20px rgba(0, 195, 255, 0.7); /* Sun color glow */
  color: #fff;
  cursor: pointer;
  display: inline-block;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 100%;
  font-weight: 900;
  line-height: 1.5;
  margin: 0;
  padding: 1.2rem 3rem;
  position: relative;
  text-transform: uppercase;
  border-radius: 999px;
  overflow: hidden;
}

.btn-53 .original {
  background: #000;
  color: #fff;
  display: grid;
  place-content: center;
  position: absolute;
  inset: 0;
  transition: transform 0.2s cubic-bezier(0.87, 0, 0.13, 1);
}

.btn-53 .letters {
  display: flex;
  justify-content: center;
  height: 100%;
  position: relative;
}

.btn-53 span {
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s cubic-bezier(0.87, 0, 0.13, 1);
  transition-delay: 0.1s;
}

.btn-53:hover .original,
.btn-53:hover span {
  transform: translateY(100%);
}

.btn-53:hover .letters span {
  opacity: 1;
  transform: translateY(0);
}

/* Additional CSS for spinning "U" */
.btn-53 span:first-child {
  display: inline-block;
  transition: transform 0.5s ease-in-out;
}

.btn-53:hover span:first-child {
  transform: rotate(360deg); /* Spin the "U" */
}

/* Adjusting nth-child delays for sequential appearance */
.btn-53:hover span:nth-child(1) {
  transition-delay: 0.1s;
}
.btn-53:hover span:nth-child(2) {
  transition-delay: 0.2s;
}
.btn-53:hover span:nth-child(3) {
  transition-delay: 0.3s;
}
.btn-53:hover span:nth-child(4) {
  transition-delay: 0.4s;
}
.btn-53:hover span:nth-child(5) {
  transition-delay: 0.5s;
}
.btn-53:hover span:nth-child(6) {
  transition-delay: 0.6s;
}
.btn-53:hover span:nth-child(7) {
  transition-delay: 0.7s;
}
.btn-53:hover span:nth-child(8) {
  transition-delay: 0.8s;
}
.btn-53:hover span:nth-child(9) {
  transition-delay: 0.9s;
}