body {
  margin: 0;
  padding: 0;
  height: 100vh;
  background: url('assets/background.jpg') no-repeat center center fixed;
  background-size: cover;
  font-family: 'Montserrat', sans-serif;
  display: flex;
  align-items: flex-end; /* lower position */
  justify-content: center;
  overflow: hidden;
  animation: zoomIn 20s ease-in-out infinite alternate;
}

.overlay {
  text-align: center;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.45);
  padding: 30px 40px;
  border-radius: 15px;
  margin-bottom: 12vh; /* lowers below aircraft */
  animation: fadeIn 2.5s ease-in-out;
}

h1 {
  font-size: 3em;
  font-weight: 900;
  margin: 0;
  letter-spacing: 2px;
}

h2 {
  font-size: 1.3em;
  font-weight: 500;
  margin-top: 10px;
}

p {
  font-size: 1em;
  font-weight: 400;
  margin-top: 15px;
  opacity: 0.85;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes zoomIn {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

@media (max-width: 600px) {
  h1 { font-size: 2em; }
  h2 { font-size: 1.1em; }
}