CodePen Embed - Anchor Positioning Input Indicator Transitions

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onsubmit=\\\"e => preventDefault()\\\">\\n  <div class=\\\"form-groups\\\">\\n    <div class=\\\"form-group\\\">\\n      <label for=\\\"name\\\" class=\\\"form-group__label\\\">\\n        Name\\n      </label>\\n      <input required=\\\"\\\" type=\\\"text\\\" id=\\\"name\\\" class=\\\"form-input\\\" placeholder=\\\"Name\\\" title=\\\"Name must be at least 2 characters\\\" pattern=\\\".{2,}\\\" />\\n    </div>\\n    <div class=\\\"form-group\\\">\\n      <label for=\\\"email\\\" class=\\\"form-group__label\\\">\\n        Email\\n      </label>\\n      <input required type=\\\"email\\\" id=\\\"email\\\" class=\\\"form-input\\\" title=\\\"Enter valid email address\\\" placeholder=\\\"Email\\\" />\\n    </div>\\n    <div class=\\\"form-group\\\">\\n      <label for=\\\"password\\\" class=\\\"form-group__label\\\">\\n        Password\\n      </label>\\n      <input required=\\\"\\\" type=\\\"password\\\" id=\\\"password\\\" class=\\\"form-input\\\" placeholder=\\\"Password\\\" title=\\\"Password must be at least 8 characters\\\" pattern=\\\".{8,}\\\" />\\n    </div>\\n  </div>\\n  <div class=\\\"form-actions\\\">\\n    <label>Layout</label>\\n    <div class=\\\"radio-groups\\\">\\n      <input type=\\\"radio\\\" name=orientation checked id=vertical />\\n      <label for=vertical>Vertical</label>\\n      <input type=\\\"radio\\\" name=orientation id=stagger />\\n      <label for=stagger>Staggered</label>\\n      <input type=\\\"radio\\\" name=orientation id=horizontal />\\n      <label for=horizontal>Horizontal</label>\\n    </div>\\n  </div>\\n  <div class=\\\"form-actions\\\">\\n    <label></label>\\n    <button type=\\\"submit\\\">Sign up</button>\\n  </div>\\n\\n</form>\\n<div class=\\\"form-indicator\\\">👈</div>\",\"css\":\"@layer demo {\\n  :root:has(#vertical:checked) {\\n    --flow: row;\\n  }\\n\\n  :root:has(#horizontal:checked) {\\n    --flow: column;\\n    --twist: 1;\\n  }\\n\\n  :root:has(#stagger:checked) {\\n    --stagger: 1;\\n  }\\n  :root {\\n    --active-anchor: --name;\\n    --active-left: anchor(var(--active-anchor) right);\\n    --active-top: calc(\\n      anchor(var(--active-anchor) top) +\\n        (\\n          (\\n              anchor(var(--active-anchor) bottom) -\\n                anchor(var(--active-anchor) top)\\n            ) * 0.5\\n        )\\n    );\\n  }\\n\\n  :root:has(.form-group:focus-within) {\\n    --anchor-scale: 1;\\n    --anchor-transition: top 0.2s, left 0.2s, transform 0.2s;\\n  }\\n\\n  #email {\\n    anchor-name: --email;\\n  }\\n  #name {\\n    anchor-name: --name;\\n  }\\n  #password {\\n    anchor-name: --password;\\n  }\\n\\n  :root:has(#email:focus) {\\n    --active-anchor: --email;\\n  }\\n  :root:has(#name:focus) {\\n    --active-anchor: --name;\\n  }\\n  :root:has(#password:focus) {\\n    --active-anchor: --password;\\n  }\\n\\n  .form-indicator {\\n    left: var(--active-left);\\n    top: var(--active-top);\\n    transform: translate(\\n        var(--active-translate-x, 1rem),\\n        var(--active-translate-y, -50%)\\n      )\\n      scale(var(--anchor-scale, 0)) rotate(calc(var(--twist, 0) * -90deg));\\n    transition: var(\\n      --anchor-transition,\\n      top 0.2s 0.2s,\\n      left 0.2s 0.2s,\\n      transform 0.2s\\n    );\\n    font-size: 4rem;\\n    background: none;\\n    position: fixed;\\n  }\\n\\n  :root:has(#horizontal:checked) {\\n    --active-translate-x: -50%;\\n    --active-translate-y: -150%;\\n    --active-left: calc(\\n      anchor(var(--active-anchor) left) +\\n        (\\n          (\\n              anchor(var(--active-anchor) right) -\\n                anchor(var(--active-anchor) left)\\n            ) * 0.5\\n        )\\n    );\\n    --active-top: calc(\\n      anchor(var(--active-anchor) top) +\\n        (\\n          (\\n              anchor(var(--active-anchor) bottom) -\\n                anchor(var(--active-anchor) top)\\n            ) * 0.5\\n        )\\n    );\\n  }\\n}\\n\\n* {\\n  box-sizing: border-box;\\n}\\n\\n:root {\\n  --red: hsl(18 100% 50%);\\n  --green: hsl(130 52% 46%);\\n  --yellow: hsl(44 83% 53%);\\n  --blue: hsl(215 100% 53%);\\n  --grey: hsl(0 0% 45%);\\n  --text: var(--gray-5);\\n  --transition: 0.2s;\\n  --valid: var(--green);\\n  --invalid: var(--red);\\n  --focus: var(--yellow);\\n  --blur: var(--gray-0);\\n  --disabled: var(--grey);\\n}\\n\\n.whitespace {\\n  width: 0.5ch;\\n}\\n\\n:where(html) {\\n  background-color: transparent;\\n  color-scheme: none;\\n}\\n\\nbody {\\n  display: grid;\\n  min-height: 100vh;\\n  place-items: center;\\n  overflow: hidden;\\n  margin: 0;\\n  background-color: var(--gray-9);\\n  font-size: 1rem;\\n}\\n\\nform {\\n  display: grid;\\n  grid-gap: 1rem;\\n  place-items: center;\\n}\\n\\n.form-groups {\\n  display: grid;\\n  grid-gap: 1rem;\\n  grid-auto-flow: var(--flow);\\n}\\n\\n.form-actions {\\n  width: 100%;\\n}\\n\\n.radio-groups {\\n  display: grid;\\n  grid-template-columns: auto 1fr;\\n  align-items: center;\\n  justify-content: center;\\n  gap: 0.5rem;\\n}\\n\\n.radio-groups label {\\n  font-weight: 300;\\n  font-size: 1rem;\\n}\\n\\n.radio-groups * {\\n  display: inline-block;\\n}\\n\\n.form-group,\\n.form-actions {\\n  --color: var(--blur);\\n  display: grid;\\n  grid-auto-flow: column;\\n  align-items: center;\\n  justify-content: flex-end;\\n}\\n\\n.form-group {\\n  position: relative;\\n  left: calc((var(--stagger, 0) * var(--index)) * 4rem);\\n}\\n\\n.form-group:nth-of-type(1) {\\n  --index: 0;\\n}\\n\\n.form-group:nth-of-type(2) {\\n  --index: 1;\\n}\\n\\n.form-group:nth-of-type(3) {\\n  --index: 2;\\n}\\n\\nlabel {\\n  font-family: sans-serif;\\n  display: flex;\\n  font-weight: bold;\\n  padding-right: 1rem;\\n  transform-style: preserve-3d;\\n  transition: color var(--transition);\\n  color: var(--color);\\n  font-size: 1.25rem;\\n}\\n\\n.form-group label {\\n  grid-row: 1;\\n}\\ninput:not([type=\\\"radio\\\"]) {\\n  grid-row: 1;\\n  border: 4px solid var(--blur);\\n  background: var(--blur);\\n  border-radius: 4px;\\n  padding: 1rem 2rem;\\n  font-weight: 400;\\n  transition: border-color var(--transition);\\n  outline: transparent;\\n}\\n\\ninput:focus-visible {\\n  outline-color: var(--color);\\n}\\n\\ninput::placeholder {\\n  color: transparent;\\n}\\n\\nbutton {\\n  padding: 1rem 2rem;\\n  border-radius: 4px;\\n  border: 0;\\n  cursor: pointer;\\n  background: var(--disabled);\\n  font-weight: bold;\\n  font-size: 1.25rem;\\n  color: var(--gray-5);\\n  transition: color var(--transition), background var(--transition);\\n}\\n\\ninput:not([type=\\\"radio\\\"]),\\nbutton,\\n.radio-groups {\\n  width: 250px;\\n}\\n\\n.form-group:has(:invalid) {\\n  --color: var(--invalid);\\n}\\n\\n.form-group:has(:focus) {\\n  --color: var(--focus);\\n}\\n\\n.form-group:has(:valid) {\\n  --color: var(--valid);\\n}\\n\\n@media (prefers-reduced-motion: no-preference) {\\n  .form-group:has(:valid) label span {\\n    display: inline-block;\\n    animation: jump 0.25s calc(var(--char-index) * 0.05s);\\n  }\\n  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