*, *::before, *::after {
  box-sizing: border-box;
  margin:0;
  padding:0;
}

body {
  background: #283156;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 100vh;
}

.lightbulb__container {
  position: relative;
  width: 15rem;
  height: 19rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}
.lightbulb__container .lightbulb__bulb {
  position: relative;
  width: 13rem;
  height: 13rem;
  background: #FEFFBE;
  border-radius: 50%;
}
.lightbulb__container .lightbulb__bulb_inside {
  position: absolute;
  right: 1rem;
  top: 2rem;
  width: 8rem;
  height: 8rem;
  border-right: 1.15rem solid #FCFCF7;
  border-radius: 50%;
  transform: rotateZ(-20deg);
}
.lightbulb__container .lightbulb__bulb_bottom {
  position: absolute;
  width: 10rem;
  height: 4rem;
  bottom: -1.5rem;
  left: calc(50% - 5rem);
  background: #FEFFBE;
  border-radius: 0 0 1rem 1rem;
}
.lightbulb__container .lightbulb__bulb::before, .lightbulb__container .lightbulb__bulb::after {
  content: '';
  display: block;
  position: absolute;
  z-index: 5;
  top: 73%;
  width: 8rem;
  height: 8rem;
  background: #283156;
}
.lightbulb__container .lightbulb__bulb::before {
  left: -41%;
  border-top-right-radius: 50%;
}
.lightbulb__container .lightbulb__bulb::after {
  right: -41%;
  border-top-left-radius: 50%;
}
.lightbulb__container .lightbulb__base {
  z-index: 10;
  position: absolute;
  bottom: 1.75rem;
  width: 7.25rem;
  height: 2.5rem;
  background: #888F98;
  border-radius: 0.5rem;
}
.lightbulb__container .lightbulb__glow {
  z-index: 8;
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%) translateY(-15%) scale(0.5);
  filter: blur(5rem);
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(#FEFFBE 25%, transparent 80%);
  animation: glow 5s ease infinite;
}
.lightbulb__container .lightbulb__spiral {
  width: 5rem;
  height: 1.5rem;
  background: #7a828c;
  border-radius: 0.5rem;
  background-image: linear-gradient(180deg, transparent 45%, #565c64 10%);
  background-size: 50% 30%;
}

@keyframes glow {
  0% {
    transform: translateX(-50%) translateY(-15%) scale(0.5);
  }
  50% {
    transform: translateX(-50%) translateY(-15%) scale(1.15);
  }
  100% {
    transform: translateX(-50%) translateY(-15%) scale(0.5);
  }
}