* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
}

header, footer {
  padding: 12px;
  text-align: center;
  background: #111;
  color: #fff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 12px;
}

.card {
  background: #f5f5f5;
  border-radius: 8px;
  overflow: hidden;
}

.card img {
  width: 100%;
  aspect-ratio: 2 / 3; /* 電影海報感 */
  object-fit: cover;
  display: block;
}

.card h3 {
  font-size: 14px;
  padding: 8px;
  margin: 0;
  text-align: center;
}

/* 平板以上 */
@media (min-width: 768px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}