body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: url('your-background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
}

.floating-icon {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  z-index: 1000;
}

header {
  display: flex;
  justify-content: flex-end;
  padding: 1em 2em;
  background-color: rgba(0, 0, 0, 0.5);
}

nav a {
  margin-left: 1.5em;
  text-decoration: none;
  color: #fff;
  font-weight: 600;
}

main {
  padding: 4em 2em;
  text-align: center;
  backdrop-filter: blur(4px);
}

footer {
  text-align: center;
  padding: 2em;
  background-color: rgba(0, 0, 0, 0.6);
  font-size: 0.9em;
}