body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background: url('images/background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  backdrop-filter: blur(6px);
}
.overlay {
  background-color: rgba(0, 0, 0, 0.65);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 0 20px rgba(255, 0, 0, 0.6);
}
h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  color: #ff4d4d;
}
p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: #eee;
}
button {
  background: #ff0000;
  color: #fff;
  font-size: 1.2rem;
  padding: 14px 32px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 12px #ff000088;
  transition: all 0.3s ease;
}
button:hover {
  background: #ff4d4d;
}
footer {
  margin-top: 30px;
  font-size: 0.85rem;
  color: #ccc;
}