body {
  margin: 0;
  background-color: #000;
  overflow: hidden;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.solar-system {
  position: relative;
  width: 400px;
  height: 400px;
}

/* Sun stays centered */
.sun {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, yellow, orange);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 30px 10px rgba(255, 200, 0, 0.8);
  z-index: 2;
}

/* Earth rotates around Sun */
/* EARTH ORBIT AROUND SUN (Already working fine) */
.earth-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  margin-left: -150px;
  margin-top: -150px;
  animation: rotate-earth 10s linear infinite;
}

/* EARTH */
.earth {
  position: absolute;
  top: 0;
  left: 50%;
  width: 20px;
  height: 20px;
  background-color: #2ecc71;
  border-radius: 50%;
  transform: translateX(-50%);
}

/* MOON ORBIT AROUND EARTH */
.moon-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px; /* distance from earth */
  height: 40px;
  margin-left: -20px;
  margin-top: -20px;
  animation: rotate-moon 2s linear infinite;
}

/* MOON */
.moon {
  position: absolute;
  top: 0;
  left: 50%;
  width: 8px;
  height: 8px;
  background-color: #ccc;
  border-radius: 50%;
  transform: translateX(-40%);
}

/* ANIMATION KEYFRAMES */
@keyframes rotate-earth {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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