* {
  -webkit-user-drag: none;
  user-select: none;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}

#ctn-background-image {
  position: absolute;
}

#ctn-background-image img {
  width: 100%;
  height: 100%;
}

.central-ctn {
  display: grid;
  place-items: center;
  height: 100%;
}
.ctn-planets {
  border: 2.2px solid black;
  animation: rotate 35s infinite linear;
  border-radius: 50%;
  position: absolute;
}

@keyframes rotate {
  from {
    rotate: 0deg;
  }
  to {
    rotate: 360deg;
  }
}
.ctn-mercury {
  width: 160px;
  height: 160px;
}

.ctn-venus {
  width: 270px;
  height: 270px;
}

.ctn-earth {
  width: 370px;
  height: 370px;
}

.ctn-mars {
  width: 480px;
  height: 480px;
}

.ctn-jupiter {
  width: 610px;
  height: 610px;
}

.ctn-saturn {
  width: 710px;
  height: 710px;
}

.ctn-uranus {
  width: 810px;
  height: 810px;
}

.ctn-neptune {
  width: 900px;
  height: 900px;
}

.element-img {
  display: flex;
  animation: rotatePlanet 20s infinite linear;
}

@keyframes rotatePlanet {
  from {
    rotate: 0deg;
  }
  to {
    rotate: 360deg;
  }
}

.element-sun img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  position: relative;
}

.element-sun {
  animation: rotate2 40s infinite linear;
}

.element-inner img {
  position: absolute;
  z-index: 7;
}

@keyframes rotate2 {
  from {
    rotate: 0deg;
  }
  to {
    rotate: 360deg;
  }
}

.element-sun {
  animation: none;
}

.element-mercury img {
  width: 20px;
  height: 20px;
  top: 17%;
}

.element-venus img {
  width: 30px;
  height: 30px;
  right: 25%;
  bottom: -1%;
}

.element-earth img {
  width: 35px;
  height: 35px;
  left: 0;
  bottom: 24%;
}

.element-mars img {
  width: 30px;
  height: 30px;
  top: 0;
  left: 29%;
}

.element-jupiter img {
  width: 55px;
  height: 55px;
  top: 20%;
  right: 2.5%;
}

.element-saturn img {
  width: 95px;
  height: 50px;
  bottom: 0%;
  right: 25%;
}

.element-uranus img {
  width: 40px;
  height: 40px;
  top: 50%;
  left: -2.5%;
}

.element-neptune img {
  width: 40px;
  height: 40px;
  top: -1%;
  left: 60%;
}

/* ... */

.side-menu-default {
  position: absolute;
  background-color: black;
  width: 250px;
  height: 100%;
  bottom: 0;
  left: 0;
  color: white;
}

.side-menu-heading {
  display: flex;
  justify-content: center;
}

.side-menu-content {
  display: flex;
  justify-content: center;
  color: black;
}

.content-button {
  background-color: darkred;
  color: white;
  width: 70%;
  height: 50px;
  display: flex;
  border-radius: 25px;
  justify-content: center;
  align-items: center;
  font-size: 15px;
  cursor: pointer;
}

.content-button:hover {
  box-shadow: 0 0 10px white;
}

.side-menu-planets-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin-top: 50px;
}

.side-menu-planets-card {
  width: 70%;
  background-color: white;
  text-align: center;
  cursor: pointer;
  border-radius: 15px;
  padding: 5px 0;
}

.side-menu-planets-card h1 {
  margin: 0;
  font-size: 25px;
  color: black;
}

#side-menu-planets-minicard {
  display: none;
  width: 40%;
  background-color: white;
  text-align: center;
  cursor: pointer;
  border-radius: 15px;
  padding: 5px 0;
}

#side-menu-planets-minicard h1 {
  margin: 0;
  font-size: 20px;
  color: black;
}

.other-side-default {
  position: absolute;
  right: 0;
  width: 250px;
  height: 500px;
  border-top-left-radius: 20px;
  border-bottom-left-radius: 20px;
  background-color: black;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 20px 15px;
  color: white;
}

.other-side-content {
  text-align: center;
}

.other-side-heading {
  display: flex;
  flex-direction: column;
}

.other-side-heading h1 {
  margin: 0;
  text-align: center;
}

.other-side-heading img {
  height: 60px;
}

.other-side-heading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}

.other-side-footer {
  display: flex;
  flex-direction: column;
  text-align: center;
  font-size: 10px;
  gap: 30px;
}

.other-side-footer-left h1,
p {
  margin: 0;
}

.other-side-footer-right h1,
p {
  margin: 0;
}

.other-side-footer-left-card p {
  font-size: 15px;
}