<div class="text-shadow" contenteditable>Hello World !</div>
<div class="code">
  <pre id="result"></pre>
</div>

<form class="form">
  <span>text-shadow:</span>
  <label for="x-offset">x-offset:</label>
  <input type="number" enterkeyhint="enter" min="-100" max="100" value="5" step="1" id="x-offset" name="x-offset" />
  <label for="y-offset">y-offset:</label>
  <input type="number" enterkeyhint="enter" min="-100" max="100" value="5" step="1" id="y-offset" name="y-offset" />
  <label for="blur-radius">blur-radius:</label>
  <input type="number" enterkeyhint="enter" min="0" max="100" value="5" step="1" id="blur-radius" name="blur-radius" />
  <label for="color">color:</label>
  <input type="color" value="#09fa00" id="color" name="color" />
</form>
@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #557;
  color: #fff;
  display: grid;
  grid-template-columns: 1fr max-content;
  gap: 1.25rem;
}

.form {
  grid-column: 2 / 3;
  grid-row: 1 / span 2;
  background: rebeccapurple;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 10px;
  align-content: start;
  padding: 20px;
  min-width: 20vw;
  font-family: "Exo", Arial, sans-serif;
}

.form span {
  grid-column: 1 / -1;
}

.form input {
  display: inline-flex;
  padding: 5px 10px;
  justify-self: start;
  border-radius: 4px;
  min-width: 80px;
  min-height: 2.5rem;
}

.form label {
  align-self: center;
  text-align: right;
}

.form input[type="color"] {
  padding: 0;
}

input[type="color" i]::-webkit-color-swatch-wrapper {
  padding: 0;
  border: none 0;
  border-radius: 4px;
}

.text-shadow {
  justify-self: center;
  align-self: center;
  font-size: clamp(1.5rem, 1.5rem + 3vw, 3rem);
}

.code {
  justify-self: center;
  align-self: start;
  font-size: clamp(1rem, 1rem + 2vw, 1.5rem);
}

:root {
  --x-offset: 5;
  --y-offset: 5;
  --blur-radius: 5;
  --color: #09fa00;
}

.text-shadow {
  text-shadow: calc(var(--x-offset) * 1px) calc(var(--y-offset) * 1px)
    calc(var(--blur-radius) * 1px) var(--color);
}
const offsetX = document.querySelector("#x-offset");
const offsetY = document.querySelector("#y-offset");
const blur = document.querySelector("#blur-radius");
const color = document.querySelector("#color");
const rootElement = document.documentElement;
const resultElement = document.querySelector("#result");

const render = () => {
  const result = `text-shadow: ${offsetX.value}px ${offsetY.value}px ${blur.value}px ${color.value};`;

  resultElement.innerHTML = `<code>${result}</code>`;
};

render();

[offsetX, offsetY, blur, color].forEach((input, index) => {
  input.addEventListener("change", (etv) => {
    render();
    rootElement.style.setProperty(`--${etv.target.id}`, `${etv.target.value}`);
  });
});
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