html {
  background-color: #7C78C3;
}

.body {
  position: fixed; 
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('https://whizzy.neocities.org/webtopia/img/spaceuniverse.jpg');
  opacity: 0.3;
  z-index: -1; 
}

.main-container {
  display: grid;
  grid-template-columns: 220px 1fr 220px;
  gap: 10px;
  background: #f9f9f9;
  border: 6px solid #888;
  padding: 10px;
  box-shadow: 0 0 20px #555;
  width: 80%;  
  margin: 0 auto;  
}

header {
  grid-column: 1 / -1;
  background: linear-gradient(to right, orange, yellow, green, cyan, blue, violet);
  color: white;
  text-align: center;
  padding: 10px;
  font-size: 2.2rem;
  font-weight: bold;
  border: 4px dotted #fff;
}

.sidebar {
  background-color: #f0f0ff;
  padding: 10px;
  border: 2px dashed #666;
}

.navbar {
  border: 1px solid black;
  border-radius: 5px;
  padding: 5px;
  width: 90%;
  margin:auto;
  background: #9D9C9C;
  background: linear-gradient(
    180deg, #ECDC5F 0%, #ECDC5F 24%, #ECC632 78%, #ECDC5F 100%);
  text-align:center;
  box-shadow: 0px 0px 3px #575757;
}

/* nav buttons */
.navbutton {
  box-shadow: inset 0px 1px 0px 0px var(--button-shadow, #ff9933), 0px 2px 1px black;
  background-color: var(--button-background, #f9f9f9);
  border-radius: 6px;
  border: 1px solid white;
  display: inline-block;
  cursor: pointer;
  color: white;
  font-family: "navbuttonfont", MS; 
  font-size: 10px;
  padding: 3px;
  text-decoration: none;
  text-shadow: 0px 1px 0px black;
  width: 120px;
  margin-right: 3px;
  text-align: center;
  font-weight: bold;
}
.navbutton:active {
  position: relative;
  top: 1px;
}

main {
  background: #fff;
  padding: 15px;
  border: 2px solid #ccc;
}