body {
  background-color: #ffffff;
  font-family: 'Times New Roman', serif;
  text-align: center;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  font-size: 36px;
  color: #333;
}

h2, h3 {
  font-size: 20px;
  color: #666;
}

hr {
  border: none;
  border-top: 2px solid #666;
  margin: 20px 0;
}

a {
  color: #333;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

@media only screen and (max-width: 600px) {
  h1 {
    font-size: 24px;
  }

  h2, h3 {
    font-size: 18px;
  }
}

.menu {
  margin-top: 30px;
}

.menu ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.menu ul li {
  display: inline-block;
  margin-right: 10px;
}

.menu ul li a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid #666;
  border-radius: 5px;
  text-decoration: none;
  color: #333;
}

.menu ul li a:hover {
  background-color: #666;
  color: #fff;
}

#popupOverlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1;
}

#popupContainer {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
}

#closeButton {
  position: absolute;
  top: 10px;
  right: 10px;
  cursor: pointer;
}

.watermark {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  z-index: -1;  /* Behind the content */
  background-image: url('SP3-Transparent.png');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.2; /* Adjust opacity as needed */
  transform: translate(-50%, -50%);
}

/* Add spacing between list items */
ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

ul li {
  margin-bottom: 10px; /* Adjust the value as needed to create adequate spacing */
}