<input type="checkbox" aria-label="Open the menu">

input {
  width: 150px; /* control the size */
  aspect-ratio: 1;
  background: linear-gradient(#000 50%, #0000 0) 0 0/100% 40%;
 
  -webkit-appearance:none;
  -moz-appearance:none;
  appearance:none;
  cursor:pointer;
}
input:checked {
  background: 
    conic-gradient(from 90deg at 33% 33%, #0000 90deg, #000 0) 
    100% 100%/60% 60%;
  transform: translateZ(0px) rotate(45deg);
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-content: center;
}