body {
  margin: 0;
  padding: 0;
  background: #008080;
  font-family: 'Courier New', Courier, monospace;
  overflow: hidden;
}

.taskbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: #000080;
  display: flex;
  align-items: center;
  padding: 0 10px;
}

#start-button {
  background: silver;
  border: 2px outset white;
  font-weight: bold;
  padding: 5px 10px;
  cursor: pointer;
}

#start-menu {
  position: absolute;
  bottom: 40px;
  left: 10px;
  background: white;
  border: 2px outset gray;
  width: 150px;
}

.start-header {
  background: navy;
  color: white;
  padding: 5px;
  font-weight: bold;
}

#start-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#start-menu li {
  padding: 8px;
  cursor: pointer;
}

#start-menu li:hover {
  background: lightblue;
}

.hidden {
  display: none;
}

.desktop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 40px;
  padding: 20px;
}

.icon {
  width: 80px;
  text-align: center;
  margin: 20px;
  cursor: pointer;
  display: inline-block;
}

.icon img {
  width: 48px;
  height: 48px;
}

.window {
  position: absolute;
  top: 100px;
  left: 100px;
  background: white;
  border: 2px outset gray;
  width: 300px;
}

.window-header {
  background: navy;
  color: white;
  padding: 5px;
  display: flex;
  justify-content: space-between;
}

.window-body {
  padding: 10px;
}