Reaching a planet with ring effect using CSS

Question

I'm trying to make a planet with rings like this photo

I am currently doing this in what seems very dirty. A ring (ellipse) is a div with a background, and the black frame is rotated, and I achieve the effect of the ring going behind the planet by adding another half of the red circle on top.

Here is the JSFiddle , and below is a snippet demonstration.

.elipse {
  width: 300px;
  height: 105px;
  background: none;
  border-radius: 50%;
  -ms-transform: rotate(40deg);  /* IE 9 */
  -webkit-transform: rotate(40deg);  /* Safari */
  transform: rotate(40deg);
  position: absolute;
  left: 45px;
  top: 45px;
  border: 5px solid black;
}
.full-planet {
  height: 170px;
  width: 170px;
  border-radius: 170px 170px 170px 170px;
  -moz-border-radius: 170px 170px 170px 170px;
  -webkit-border-radius: 170px 170px 170px 170px;
  position: absolute;
  left: 120px;
  top: 20px;
  background: red;
}
.half-planet {
  height: 85px;
  width: 170px;
  border-radius: 170px 170px 0 0;
  -moz-border-radius: 170px 170px 0 0;
  -webkit-border-radius: 170px 170px 0 0;
  -ms-transform: rotate(40deg);  /* IE 9 */
  -webkit-transform: rotate(40deg);  /* Safari */
  transform: rotate(40deg);
  position: absolute;
  left: 147px;
  top: 30px;
  background: red;
}
.cont {
  padding-left: 100px;
  padding-top: 100px;
  position: relative;
  width: 0;
  height: 0;
}

<div class='container'>
  <div class="full-planet"></div>
  <div class='elipse'></div>
  <div class="half-planet"></div>
</div>

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It is very difficult to adjust the parameters to get a good alignment. For example, if I need to change one parameter, I have to change almost all the others in order to maintain alignment. Is there a way to do this so that I don’t need to constantly adjust the parameters based on my vision? I feel that there is a cleaner way to do this.

Answer 1

SVG:

SVG /, SVG. Z- SVG , DOM. . SVG .

, SVG .

svg {
  width: 200px;
  height: 200px;
  margin: 20px;
}

<svg viewBox='0 0 130 130'>
  <path d='M0,78 a65,25 0 1 1 102.5,45' stroke='black' stroke-width='2' fill='transparent' transform='rotate(45,100,100)' />
  <circle cx='65' cy='65' r='45' fill='red' />
  <path d='M0,78 a65,25 0 1 0 102.5,45' stroke='black' stroke-width='2' fill='transparent' transform='rotate(45,100,100)' />
</svg>

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---

CSS:

CSS , , , . , , z-index . , , . ( ), .

.wrapper {
  position: relative;
  height: 200px;
  width: 200px;
}
.ring { /* produces the front part of the ring */
  position: absolute;
  height: 100%;
  width: 45%;
  left: 27.5%; /* half of 100% - width (to position in center) */
  border: 2px solid;
  border-color: black transparent black black;
  border-radius: 50%;
  transform: rotate(-45deg);
  z-index: 2; /* brings it forward */
}
.ring-behind { /* produces the part that goes behind */
  position: absolute;
  height: 100%;
  width: 45%;
  left: 27.5%; /* half of 100% - width (to position in center) */
  border: 2px solid;
  border-color: transparent black transparent transparent;
  border-radius: 50%;
  transform: rotate(-45deg);
  z-index: -1; /* sends it behind */
}
.planet {
  position: absolute;
  height: 75%;
  width: 75%;
  top: 12.5%; /* half of 100% - height (to position in middle) */
  left: 12.5%; /* half of 100% - width (to position in center) */
  border-radius: 50%;
  background: red;
  z-index: 1; /* above the back part of the ring but below the front */
}

/* just for demo */

.wrapper {
  transition: all 1s;
}
.wrapper:hover {
  height: 300px;
  width: 300px;
}

<div class='wrapper'>
  <div class='ring'></div>
  <div class='ring-behind'></div>
  <div class='planet'></div>
</div>

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Answer 2

- ...

CSS, ( div , ..... webkit)

.planet {
  width: 330px;
  height: 330px;
  background-color: lightgreen;
  border-radius: 50%;
  margin: 100px;
  position: relative;
  perspective: 1000px;
  transform-style: preserve-3d;
  box-shadow: inset green -20px -20px 70px;
}

.ring {
  width: 150%;
  height: 150%;
  border: solid 10px red;
  border-radius: 50%;
  top: -25%; 
  left: -25%; 
  position: absolute;
  transform: rotate3d(0.8, 0.2, 0, 75deg); 
  box-sizing: border-box;
}

<div class="planet">
<div class="ring"></div>
</div>

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