body { padding-top: 70px; }

img {
    border: 5px solid #555;
}

summary  {
    cursor: pointer; /* Makes the cursor indicate interactivity */
    font-size: 32px;
    display: block;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: 500;
    line-height: 1.1;
    color: inherit;
    margin-top: 20px;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 5px;
    background-color: lightblue;
  }
  
  summary ::after {
    content: " ▶"; /* Closed state arrow */
    margin-left: 0.5em; 
  }
  
  details[open] summary ::after {
    content: " ▼"; /* Open state arrow */
  }

  details summary {
  cursor: pointer;
  position: relative;
  padding-right: 2rem;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: "🔽";
  position: absolute;
  right: 0.5rem;
  transition: transform 0.2s;
  font-size: 0.9em;

}

details[open] summary::after {
  transform: rotate(180deg);
}