.p4y-back-button {
  position: fixed;
  left: 18px;
  top: 18px;
  z-index: 99999;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: #fff;
  background: rgba(4, 8, 14, 0.72);
  text-decoration: none;
  font: 900 22px/1 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(14px);
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.p4y-back-button:hover {
  transform: translateX(-2px);
  color: #06100c;
  background: rgba(214, 255, 69, 0.92);
}

@media (max-width: 720px) {
  .p4y-back-button {
    left: 12px;
    top: 12px;
    width: 38px;
    height: 38px;
  }
}