body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    padding: 20px;
  }
  
  .accordion {
    max-width: 600px;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    background-color: #fff;
  }
  
  .accordion-item {
    border-bottom: 1px solid #ddd;
  }
  
  .accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    font-weight: 500;
    background-color: #d9e9f1;
    transition: background-color 0.3s ease;
  }
  
  .accordion-header:hover {
    background-color: #ffe6e6;
  }
  
  .accordion-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 20px;
    background-color: #fff;
    transition: max-height 0.4s ease, padding 0.4s ease;
  }
  
  .accordion-content.open {
    padding: 15px 20px;
  }
  
  .arrow {
    transition: transform 0.3s ease;
    font-size: 18px;
  }
  
  .arrow.rotate {
    transform: rotate(272deg); /* or use rotate(45deg) for + to × transition */
  }