* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  line-height: 1.6;
  color: #333;
}

/* Header */
header {
  text-align: center;
  padding: 40px 20px;
  background: #0d3b2e;
  color: white;
}

.tagline {
  margin-top: 10px;
  font-size: 18px;
  opacity: 0.9;
}

/* Hero */
.hero {
  background: url('https://images.unsplash.com/photo-1501004318641-b39e6451bec6') no-repeat center/cover;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.overlay {
  background: rgba(0,0,0,0.5);
  color: white;
  padding: 30px;
  text-align: center;
  border-radius: 10px;
}

/* Sections */
.content {
  padding: 50px 20px;
  max-width: 900px;
  margin: auto;
}

.content h2 {
  margin-bottom: 15px;
  color: #0d3b2e;
}

.content.alt {
  background: #f4f4f4;
}

/* Launch */
.launch {
  text-align: center;
  padding: 60px 20px;
  background: #0d3b2e;
  color: white;
}

.launch h2 {
  font-size: 32px;
  margin-bottom: 10px;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  background: #222;
  color: white;
}