body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #121212;
  color: #eee;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

header {
  background: #1e1e1e;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 2rem;
  font-weight: bold;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav a {
  color: #eee;
  text-decoration: none;
  transition: color 0.3s;
}

nav a:hover {
  color: #1abc9c;
}

.hero {
  background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://source.unsplash.com/1600x600/?bitcoin') center/cover;
  padding: 100px 0;
  text-align: center;
}

.market, .news {
  padding: 50px 0;
}

.coin {
  background: #1e1e1e;
  padding: 20px;
  margin: 10px 0;
  border-radius: 8px;
}

footer {
  background: #1e1e1e;
  text-align: center;
  padding: 20px 0;
}