body {
  margin: 0;
  padding: 0;
  background: url('background.png') no-repeat center center fixed;
  background-size: cover;
  font-family: Arial, sans-serif;
  color: #f0f0f0;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 0;
}

header, section, footer {
  position: relative;
  z-index: 1;
  background: rgba(30, 30, 30, 0.85);
  padding: 20px;
  margin: 20px;
  border-radius: 8px;
}

.logo {
  width: 100px;
}