.menu-bg {
  z-index: 1;
  width: 0;
  height: 0;
  background: #252b46b8;
  backdrop-filter: blur(5px);
  border-radius: 50%;
  transition: 0.3s ease;
  position: absolute;
  right: 0;
  top: 0;
}
.change {
  display: flex;
}
.change-bg {
  width: 520px;
  height: 460px;
  position: absolute;
  left: -252px;
  top: -150px;
  z-index: 10;
}

.burger-btn {
  position: fixed;
  left: 30px;
  top: 75px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 20;
  transition: 0.3s ease all;
  cursor: pointer;
}

.burger-btn.change {
  top: 25px;
  transition: 0.3s ease all;
}

.burger-menu span {
  display: flex;
  height: 7px;
  background-color: #fff;
  margin: 2px;
  justify-content: end;
  border-radius: 4px;
}
.burger-menu span:nth-child(1) {
  width: 20px;
  animation: span-menu-1 2s linear infinite;
  transition: 0.8s ease;
  top: 0;
  position: relative;
}
.burger-menu span:nth-child(2) {
  width: 30px;
  animation: span-menu-2 4s ease infinite;
  transition: 0.8s ease;
  opacity: 1;
}
.burger-menu span:nth-child(3) {
  width: 50px;
  animation: span-menu-3 2s linear infinite;
  transition: 0.8s ease;
}
@keyframes span-menu-1 {
  0%,
  100% {
    width: 20xp;
  }

  50% {
    width: 50px;
  }
}
@keyframes span-menu-2 {
  0% {
    width: 30px;
  }

  30% {
    width: 50px;
  }
  60% {
    width: 15px;
  }
  100% {
    width: 30px;
  }
}
@keyframes span-menu-3 {
  0%,
  100% {
    width: 50xp;
  }
  50% {
    width: 30px;
  }
}
.burger-btn.change span:nth-child(1) {
  transform: rotate(-45deg);
  animation: acrtive-span-menu-1 2s linear infinite;
  top: 15px;
}
.burger-btn.change span:nth-child(2) {
  position: relative;
  height: 0;
  opacity: 0;
}
.burger-btn.change span:nth-child(3) {
  transform: rotate(45deg);
  animation: acrtive-span-menu-3 2s linear infinite;
}
@keyframes acrtive-span-menu-1 {
  0%,
  100% {
    width: 40px;
  }
  50% {
    width: 40px;
  }
}
@keyframes acrtive-span-menu-3 {
  0%,
  100% {
    width: 40px;
  }
  50% {
    width: 40px;
  }
}

@media (max-width: 768.9px) {
  .burger-menu span {
    height: 5px;
  }
}

@media (max-width: 550px) {
  .burger-menu span {
    height: 4px;
  }

  .burger-btn {
    left: 20px;
    top: 40px;
  }

  .burger-btn.change span:nth-child(1) {
    top: 12px;
  }

  .change-bg {
    width: 460px;
    height: 430px;
    position: absolute;
    left: -252px;
    top: -150px;
    z-index: 10;
  }

  .change.change-bg .menu-list {
    left: 60%;
  }

  .change.change-bg .menu-list {
    top: 50%;
  }

  .change.change-bg .menu-item {
    margin: 5px 0;
  }
}