Why can't my checkbox affect my div contents?

Question

I have a checkbox and a div element. When I click on the checkbox, the contents of the div elements are supposed to rotate to form a cross. But it does not do that. Below is the code

:root {
  --main-color: red;
  --secondary-color: blue;
  --dark-color: #444;
  --light-color: #fafafa;
}

body {
  font-family: 'Montserrat', sans-serif;
  text-align: justify;
  margin: 0px;
  display: grid;
  place-items: center;
  font-size: 18px;
}

input {
  box-sizing: border-box;
}

.toggle {
  height: 100px;
  width: 100px;
  border: 1px solid black;
}

span {
  height: 20px;
  width: 100px;
  display: grid;
  place-items: center;
  background-color: blue;
  margin: 5px 0;
}

.check:checked~span {
  background: red;
}

.check:checked~.span-one {
  position: relative;
  top: 100%;
  transform: rotate(45deg);
  transition: 400ms;
}

.check:checked~.span-two {
  position: relative;
  opacity: 0;
  transition: 400ms;
}

.check:checked~.span-three {
  position: relative;
  bottom: 100%;
  transform: rotate(-45deg);
  transition: 400ms;
}

<input class="check" type="checkbox">
<div>
  <span class="span-one"></span>
  <span class="span-two"></span>
  <span class="span-three"></span>
</div>

It works without the div but I need the div for something else so I can't remove that.

How do I fix this?

Answer 1

:root {
  --main-color: red;
  --secondary-color: blue;
  --dark-color: #444;
  --light-color: #fafafa;
}

body {
  font-family: 'Montserrat', sans-serif;
  text-align: justify;
  margin: 0px;
  display: grid;
  place-items: center;
  font-size: 18px;
}

input {
  box-sizing: border-box;
}

.toggle {
  height: 100px;
  width: 100px;
  border: 1px solid black;
}

span {
  height: 20px;
  width: 100px;
  display: grid;
  place-items: center;
  background-color: blue;
  margin: 5px 0;
}

.check:checked ~ div span { /* We need to make the div the sibling instead of the span */
  background: red;
}

.check:checked ~ div .span-one {
  position: relative;
  top: 50px; /* Changed from 100% */
  transform: rotate(45deg);
  transition: 400ms;
}

.check:checked ~ div .span-two {
  position: relative;
  opacity: 0;
  transition: 400ms;
}

.check:checked ~ div .span-three {
  position: relative;
  bottom: 100%;
  transform: rotate(-45deg);
  transition: 400ms;
}

<input class="check" type="checkbox">
<div>
  <span class="span-one"></span>
  <span class="span-two"></span>
  <span class="span-three"></span>
</div>