<header>
  <h2 class="title">Date.prototype.toISOString()</h2>
  <p class="description">Конвертує дату в рядок за стандартом ISO 8601.</p>
</header>
<main>
  <div class="result">
    <button onclick="convertToIso()">Конвертувати поточну дату</button>
    <p id="isoString">Тут буде рядок ISO 8601</p>
  </div>
</main>

body {
  font-size: 16px;
  line-height: 1.5;
  font-family: monospace;
}

header {
  background-color: #f1f1f1;
  margin-bottom: 25px;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

header h2.title {
  padding-bottom: 15px;
  border-bottom: 1px solid #999;
}

header p.description {
  font-style: italic;
  color: #222;
}

.result {
  background-color: #f8f8f8;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

button {
  display: inline-block;
  background-color: #4CAF50; /* Green */
  border: none;
  color: white;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 12px;
  padding: 10px 24px;
}

function convertToIso() {
  const currentDate = new Date();
  const isoString = currentDate.toISOString();
  document.getElementById('isoString').textContent = isoString;
}

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