body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: white;

  /* Background image + overlay */
  background-image:
    linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
    url("../images/background.png");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  /* THIS restores your layout */
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}

.container {
  max-width: 800px;
  padding: 40px;
}

h1 {
  font-size: 48px;
  margin-bottom: 20px;
}

.tagline {
  font-size: 34px;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 10px;
}

.reference {
  font-size: 15px;
  opacity: 0.85;
  margin-bottom: 30px;
}

.description {
  font-size: 18px;
}