<!--Simple js Accordion start-->
<div class="accordion-group">
    <div class="accordion open closed">
      <div class="accordion-header">
        <h2 class="accordion-title">Accordion 1</h2>
        <span class="accordion-icon"><i class="fas fa-angle-down"></i></span>
      </div>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam vel massa eget magna sodales posuere.</p>
      </div>
    </div>
    <div class="accordion">
      <div class="accordion-header">
        <h2 class="accordion-title">Accordion 2</h2>
        <span class="accordion-icon"><i class="fas fa-angle-down"></i></span>
      </div>
      <div class="accordion-content">
        <p>Nullam at ex vitae dolor dapibus condimentum vel ut nisi. Sed vestibulum risus sed risus ultricies, vitae volutpat sem ultrices.</p>
      </div>
    </div>
    <div class="accordion">
      <div class="accordion-header">
        <h2 class="accordion-title">Accordion 3</h2>
        <span class="accordion-icon"><i class="fas fa-angle-down"></i></span>
      </div>
      <div class="accordion-content">
        <p>Phasellus semper, ex eu sagittis lobortis, purus lacus vehicula turpis, et auctor odio neque sed nunc.</p>
      </div>
    </div>
</div>
<!--Simple js Accordion end-->

/*  accordion css start  */
.accordion-group {
  border: 1px solid #ddd;
}

.accordion {
  border-bottom: 1px solid #ddd;
  overflow: hidden;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 15px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.accordion-header:hover {
  background-color: #eee;
}

.accordion-title {
  margin: 0;
  font-size: 18px;
}

.accordion-icon {
  display: inline-block;
  margin-left: 10px;
  font-size: 16px;
  transition: transform 0.2s ease;
}

.accordion.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion.closed .accordion-icon {
  transform: rotate(0deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  padding: 0 15px;
  transition: max-height 0.2s ease;
}

.accordion.open .accordion-content {
  max-height: 500px; /* set to your desired height */
  transition-delay: 0.1s;
}
/*  accordion css end  */

<script>
const accordions = document.querySelectorAll('.accordion');

accordions.forEach((accordion, index) => {
  const accordionHeader = accordion.querySelector('.accordion-header');
  const accordionIcon = accordion.querySelector('.accordion-icon i');

  accordionHeader.addEventListener('click', () => {
    accordion.classList.toggle('open');
    accordion.classList.toggle('closed');
    accordionIcon.classList.toggle('fa-angle-down');
    accordionIcon.classList.toggle('fa-angle-up');
  });

  // Check if this is the first accordion and set the icon rotation accordingly
  if (index === 0 && accordion.classList.contains('open')) {
    accordionIcon.classList.remove('fa-angle-down');
    accordionIcon.classList.add('fa-angle-up');
  }
});
</script>

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css"/>