body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #000;
  color: #fff;
  text-align: center;
}

header {
  padding: 20px;
  background: #111;
}

h1, h2 {
  margin: 10px 0;
}

.poster {
  max-width: 90%;
  border-radius: 10px;
  margin: 20px auto;
  display: block;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  margin: 15px 0;
  background: #e50914;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  transition: 0.3s;
}

.btn:hover {
  background: #b20710;
}

.product {
  margin: 40px 0;
}

.slider {
  position: relative;
  display: inline-block;
}

.slider img {
  max-width: 300px;
  border-radius: 10px;
}

.prev, .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.6);
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
  border-radius: 50%;
}

.prev { left: -40px; }
.next { right: -40px; }