body {
  font-family: 'Lato', sans-serif;
  background-color: #fff;
  color: #fff;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
}

.container { 
  max-width: 800px;
  background: #fff;
  padding: 40px;
  margin: 20px;
}

.abstract {
  font-size: 1.2rem;
  text-align: justify;
  
  margin: 20px 0;
  line-height: 1.6;
}

.keywords {
  font-size: 1.1rem;
  font-weight: bold;
  color: #333;
  padding: 10px;
  margin: 10px 0;
}

.keywords span {
  font-weight: normal;
  color: #555;
}



h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-align: center;
  color: #111;
}

h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-top: 40px;
  color: #222;
  border-bottom: 2px solid #eaeaea;
  padding-bottom: 10px;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 30px;
  color: #333;
}

p {
  font-size: 1.15rem;
  margin-bottom: 20px;
  color: #444;
}

.author-info {
  text-align: center;
  font-size: 0.9rem;
  color: #777;
  margin-bottom: 40px;
}

img {
  display: block;
  max-width: 100%;
  margin: 20px auto;
  border: 1px solid #ddd;
  padding: 5px;
  border-radius: 4px;
}

figcaption {
  font-size: 0.9rem;
  color: #666;
  text-align: center;
  margin-top: 5px;
}


hr {
  border: none;
  height: 1px;
  background-color: #ddd;
  margin: 40px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

th, td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: left;
}

th {
  background-color: #f2f2f2;
}

.references {
  margin-top: 40px;
}

.references ol {
  padding-left: 20px;
}

.references li {
  margin-bottom: 10px;
}

.references a {
  color: #444; /* Match the color of paragraph text */
  text-decoration: none; /* Remove underline from reference links */
}

.references a:hover {
  text-decoration: underline; /* Add underline on hover for reference links */
}

.share {
  margin-top: 30px;
  text-align: center;
}

.share h3 {
  font-size: 1.2rem;
}

.share a {
  margin: 0 10px;
  color: #0073e6; /* Color for share links */
  text-decoration: none;
}

.share a:hover {
  text-decoration: underline; /* Underline on hover for share links */
}

.tooltip {
  position: relative;
  display: inline-block;
  cursor: pointer;
  color: black; /* Change the color of the reference marker to black */
  text-decoration: underline; /* Underline to indicate it is a link */
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 50px; /* Width for reference number tooltip */
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 125%; /* Position above the text */
  left: 50%;
  margin-left: -25px; /* Center the tooltip */
  opacity: 0; /* Hidden by default */
  transition: opacity 0.3s; /* Fade-in effect */
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1; /* Show the tooltip on hover */
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  margin: 20px 0;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}