/* Reset & base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body {
  background-color: #f4f4f9;
  color: #333;
}

/* Header */
header {
  background-color: #003366;
  color: white;
  padding: 20px 0;
  text-align: center;
}

header p {
  font-size: 1.1em;
}

/* Navigation */
nav {
  background-color: #0055a5;
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 10px 0;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #ffcc00;
}

/* Hero Section */
.hero {
  background: url('https://images.unsplash.com/photo-1600195077076-0034f597d8a1') no-repeat center center/cover;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.7);
}

.hero h1 {
  font-size: 3em;
  background-color: rgba(0, 51, 102, 0.6);
  padding: 20px 40px;
  border-radius: 10px;
}

/* Welcome Section */
.welcome {
  padding: 40px 20px;
  max-width: 900px;
  margin: auto;
  text-align: center;
}

.welcome p {
  line-height: 1.6;
  font-size: 1.1em;
}

/* Enter Button */
.welcome button {
  margin-top: 20px;
  padding: 12px 25px;
  background-color: #0055a5;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1em;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.welcome button:hover {
  background-color: #003366;
}

/* Footer */
footer {
  background-color: #003366;
  color: white;
  text-align: center;
  padding: 15px 0;
  margin-top: 30px;
}

/* Responsive Design */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 2em;
    padding: 10px 20px;
  }

  nav {
    flex-direction: column;
  }
}

body {
  opacity: 0;
  transition: opacity 1s ease-in;
}

body.fade-in {
  opacity: 1;
}