body {
     margin: 0;
     padding: 0;
     font-family: 'Nunito', sans-serif;
     background-color: #f9f9f9;
     color: #333;
     opacity: 0;
     transition: opacity 0.5s ease;
 }

 body.fade-out {
     opacity: 0;
 }

 body.fade-in {
     opacity: 1;
 }


 header {
     background-color: #3f7ccf;
     color: white;
     display: flex;
     align-items: center;
     padding: 10px 20px;
     gap: 3%;
 }

 header img {
     height: 30px;
     margin-right: 15px;
 }

 header h1 {
     font-size: 1.8rem;
     margin: 0;
 }

 .volverBtn {
     transition: transform 0.2s ease-in-out;
     cursor: pointer;
 }

 .volverBtn:hover {
     transform: scale(1.1);
 }

 .contenido {
     max-width: 900px;
     background: white;
     margin: 30px auto;
     padding: 30px;
     border-radius: 10px;
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15); /* Corrected box shadow alpha value */
 }

 .contenido h1 {
     color: #3f7ccf;
     font-size: 2rem;
     margin-bottom: 20px;
     text-align: center;
 }

 .contenido p {
     font-size: 1.1rem;
     line-height: 1.8;
     text-align: justify;
 }

 @media (max-width: 768px) {
     .contenido {
         margin: 20px 15px; /* Reduce margin on smaller screens */
         padding: 25px 20px; /* Adjust padding */
     }

     header h1 {
         font-size: 1.5rem;
     }

     .contenido h1 {
         font-size: 1.5rem;
     }

     .contenido p {
         font-size: 1rem;
         text-align: left; /* Justified text can be hard to read on narrow screens */
     }
 }


 .zona {
     display: flex;
     align-items: center;
     background-color: #e8f5e9;
     border-left: 6px solid #4caf50;
     padding: 12px 18px;
     border-radius: 8px;
     margin-bottom: 15px;
     gap: 10px;
 }

 .zona-icono {
     font-size: 1.5rem;
 }

 .zona-texto {
     font-size: 1.1rem;
     font-weight: 500;
 }

 .nota {
     margin-top: 25px;
     font-style: italic;
     text-align: center;
     color: #555;
 }

 @media (max-width: 600px) {
     .zona-texto {
         font-size: 1rem;
     }
 }