body {
  background-color: #0d1117;
  color: #e6e6e6;
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background: linear-gradient(90deg, #001f3f, #003366, #001f3f);
  color: gold;
  padding: 1.5em 0;
  border-bottom: 2px solid #444;
}

h1 {
  margin: 0;
  font-size: 2em;
  letter-spacing: 1px;
}

h2 {
  margin-top: 1.5em;
  color: #ffd700;
}

main {
  padding: 2em;
}

/* Responsive calendar iframe container */
.calendar-frame {
  position: relative;
  overflow: hidden;
  padding-top: 75%; /* 4:3 aspect ratio */
  margin-top: 2em;
}

.calendar-frame iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Calendar links section */
.calendar-links {
  margin-top: 1.5em;
}

.calendar-links a {
  color: #87cefa;
  text-decoration: none;
  font-weight: bold;
}

.calendar-links a:hover {
  text-decoration: underline;
  color: #1e90ff;
}

/* List of calendar pages */
ul.calendar-links {
  list-style: none;
  padding: 0;
}

ul.calendar-links li {
  margin: 0.8em 0;
}

ul.calendar-links a {
  font-size: 1.2em;
  color: #87cefa;
  text-decoration: none;
}

ul.calendar-links a:hover {
  color: #1e90ff;
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  h1 {
    font-size: 1.5em;
  }
  h2 {
    font-size: 1.2em;
  }
  main {
    padding: 1em;
  }
}