html, body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: Verdana, Arial, sans-serif;

  background-image: url("../../images/iconbackground.png");
  background-repeat: repeat;
  background-position: 0 0;
  background-size: auto;
  background-color: #d9ecff;

  animation: bg-scroll 40s linear infinite;
}

@keyframes bg-scroll {
  from { background-position: 0 0; }
  to { background-position: 0 512px; }
}

.site-box {
  max-width: 800px;
  margin: 60px auto;
  padding: 30px;
  background-color: rgb(255, 255, 255);
  border: 4px solid #5aa9ff;
  box-shadow: 0 0 0 2px #7f9fcf;
  box-sizing: border-box;
}

.page-title {
  text-align: center;
  font-size: 2.4em;
  margin-top: 0;
  margin-bottom: 8px;
}

.page-subtitle {
  text-align: center;
  font-size: 0.95em;
  color: #555;
  margin-top: 0;
  margin-bottom: 35px;
}

.site-category {
  margin-bottom: 30px;
}

.site-category h2 {
  font-size: 1.3em;
  margin-bottom: 10px;
  padding-bottom: 4px;
  border-bottom: 2px dashed #5aa9ff;
}

.site-category ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.site-category li {
  margin: 6px 0;
}

.site-category a {
  color: #003366;
  font-weight: bold;
  text-decoration: none;
}

.site-category a:hover {
  text-decoration: underline;
}

.site-desc {
  font-weight: normal;
  color: #444;
}

.return-home {
  text-align: center;
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.return-home a,
.return-home button {
  padding: 10px 22px;
  background-color: #e6f2ff;
  color: #003366;
  font-weight: bold;
  border: 3px solid #5aa9ff;
  box-shadow: inset 0 0 0 2px #9bbcf0;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.return-home a,
.return-home button {
  padding: 10px 22px;
  background-color: #e6f2ff;
  color: #003366;
  font-weight: bold;
  border: 3px solid #5aa9ff;
  box-shadow: inset 0 0 0 2px #9bbcf0;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  font-family: Verdana, Arial, sans-serif;
}

.return-home a:active,
.return-home button:active {
  transform: translateY(1px);
}