.muestra {
    margin-bottom: 1em;
    border: 1px solid #444;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 0 4px rgba(255,204,0,0.2);
    transition: box-shadow 0.3s ease;
  }
  
  .toggle-muestra {
    width: 100%;
    text-align: left;
    padding: 1em;
    font-weight: bold;
    border: none;
    background: #333;
    color: #ffcc00;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
  }
  
  .toggle-muestra:hover {
    background: #444;
  }
  
  .toggle-muestra::after {
    content: "▸";
    transition: transform 0.3s ease;
  }
  
  .toggle-muestra.active::after {
    transform: rotate(90deg);
  }
  
  .contenido-muestra {
    max-height: 0;
    overflow: hidden;
    background: #1f1f1f;
    transition: max-height 0.5s ease, padding 0.5s ease;
    padding: 0 1em;
    color: #fff;
  }
  
  .contenido-muestra.open {
    max-height: 1000px;
    padding-top: 1em;
    padding-bottom: 1em;
  }
  
  .galeria-muestra {
    display: flex;
    gap: 1em;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1em;
  }
  
  .galeria-muestra img {
    max-height: 300px;
    border-radius: 4px;
    box-shadow: 0 0 6px rgba(0,0,0,0.4);
  }