body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #111;
  color: #eee;
}

header, footer {
  text-align: center;
  padding: 1rem;
  background: #222;
  border-bottom: 1px solid #333;
}

.poster-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  padding: 2rem;
  justify-items: center;
}

.poster img {
  width: 100%;
  max-width: 240px;
  border-radius: 8px;
  transition: transform 0.2s ease;
}

.poster:hover img {
  transform: scale(1.05);
  box-shadow: 0 0 10px #00f2ff;
}