body {
  font-family: Futura, "Trebuchet MS", Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #999999;
  color: white;
  display: flex;
  flex-direction: column;
}
header {
  background-color: #999999;
  color: white;
  padding: 10px;
  text-align: center;
}
nav {
  background-color: #999999;
  display: flex;
  justify-content: space-around;
  padding: 10px;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}
nav a {
  color: white;
  text-decoration: none;
  padding: 5px 10px;
  background-color: #333333;
  border-radius: 5px;
  font-size: 2vw;
}
nav a:hover {
  color: #333333;
  background-color: #ff3300;
}
.container {
  display: flex;
  margin-top: 50px; /* To avoid overlapping the fixed nav bar */
  flex-grow: 1;
}
h1 { font-weight: normal; color: #9900ff; font-size: calc(20px + 2vw); }
h2 { font-weight: normal; color: #9900ff; font-size: calc(16px + 1vw); }
h3 { font-weight: normal; color: #9900ff; font-size: calc(12px + 1vw); }
.sidebar {
  background-color: #cccccc;
  background-image: url("cthru-circuits.png"); 
  background-position: center;
  background-repeat: repeat;
  color: #333333;
  flex: 1;
  min-width: 150px;
  max-width: 300px;
  padding-top: 5px;
  padding-left: 10px;
  padding-right: 20px;
  padding-bottom: 20px;
}
.main-content {
  flex: 3;
  background: linear-gradient(#ffffff, #99cccc);
  padding-top: 60px;
  padding-left: 5%;
  padding-right: 5%;
  padding-bottom: 20px;
  text-align: center; /* Center the content */
  position: relative;
}
.main-content img {
  display: block;
  margin: 0 auto 20px; /* Center the image and add bottom spacing */
  max-width: 100%;
  width: 600px;
  height: auto;
}
.main-content p, .main-content ul {
  font-size: calc(10px + 1vw);
  text-align:left; 
  color: #333333;
}
footer {
  background-color: #669999;
  color: #333333;
  text-align: center;
  padding: 10px;
}