<button popovertarget="my-tooltip">
  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" aria-hidden="true">
    <path stroke-linecap="round" stroke-linejoin="round" d="m11.25 11.25.041-.02a.75.75 0 0 1 1.063.852l-.708 2.836a.75.75 0 0 0 1.063.853l.041-.021M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0Zm-9-3.75h.008v.008H12V8.25Z" />
  </svg>
  <span class="sr-only">Toggle tooltip</span>
</button>
<!-- for demo reasons, the popover is set to manual :) feel free to change it to auto if you want to light dismiss it -->
<div id="my-tooltip" popover="manual">Look at the cute little popover</div>

<fieldset class="controls">
  <legend>Position icon:</legend>
  <div class="grid">
    <label><input type="radio" name="position" class="top left" /><span class="sr-only">top left</span></label>
    <label><input type="radio" name="position" class="top center" /><span class="sr-only">top center</span></label>
    <label><input type="radio" name="position" class="top right" /><span class="sr-only">top righ</span></label>
    <label><input type="radio" name="position" class="left" /><span class="sr-only">left</span></label>
    <label><input type="radio" name="position" class="center" checked /><span class="sr-only">center</span></label>
    <label><input type="radio" name="position" class="right" /><span class="sr-only">right</span></label>
    <label><input type="radio" name="position" class="bottom left" /><span class="sr-only">bottom left</span></label>
    <label><input type="radio" name="position" class="bottom center" /><span class="sr-only">bottom center</span></label>
    <label><input type="radio" name="position" class="bottom right" /><span class="sr-only">bottom right</span></label>
  </div>
</fieldset>

/* For this anchoring to work, reset the margin of the popover and display the anchor (button in this case) as a grid */

[popover] {
  inset: unset;
  background: hotpink;
  color: white;
  border-radius: 0.5rem;
  border: 0;
  padding: 1rem;
  margin: 0.5rem;
  /* position */
  position-anchor: --button;
  position-area: top right;
  position-try-fallbacks: flip-inline, flip-block, flip-block flip-inline;
  position-try-order: most-width;
}

button {
  all: unset;
  anchor-name: --button;
  transition: color 0.4s ease-out;
  &:is(:hover, :focus) {
    color: hotpink;
  }
}

svg {
  width: 3rem;
  aspect-ratio: 1;
}

body {
  display: flex;
  flex-direction: column;
  align-items: var(--align, center);
  justify-content: var(--justify, center);
  min-height: 100dvh;
  margin: 0;
  font-family: sans-serif;
  font-size: 1.16rem;
  line-height: 1.6;
  color: #fff;
  background: #2b2c28;
}

@layer controls {
  .controls {
    position: fixed;
    bottom: 20vh;
    margin: 0;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.25rem;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    justify-items: center;
  }

  label,
  input {
    width: 1.5rem;
    aspect-ratio: 1;
    margin: 0;
    padding: 0;
  }

  input[type="radio"] {
    accent-color: deeppink;
    cursor: pointer;
  }

  body:has(.left:checked) {
    --align: start;
  }

  body:has(.right:checked) {
    --align: end;
  }

  body:has(.center:checked) {
    --justify: center;
  }

  body:has(.top:checked) {
    --justify: start;
  }

  body:has(.bottom:checked) {
    --justify: end;
  }

  .sr-only {
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
  }
}