:root {
  --primary-color: #ff4757;
  --bg-color: #f7f9fc;
  --card-bg: #ffffff;
}

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    'Open Sans',
    'Helvetica Neue',
    sans-serif;
  background-color: var(--bg-color);
  margin: 0;
  color: #333333;
}

.app-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

head {
  text-align: center;
  margin-bottom: 40px;
  color: #2f3542;
}

main {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 30px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s;
}

.image {
  font-size: 3rem;
  margin-bottom: 10px;
}

.price {
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1.2rem;
  margin: 10px 0;
}

button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.2s;
}

/** 购物车 */
.cart {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 12px;
  height: fit-content;

  ul {
    list-style: none;
    padding: 0;
  }

  li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid #eeeeee;
  }
}

.item-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon {
  font-size: 1.5rem;
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  button {
    padding: 5px 10px;
    background: #eeeeee;
    color: #333333;
  }
}

.total {
  display: flex;
  justify-content: space-between;
  font-size: 1.2rem;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid #eeeeee;
}

.checkout {
  width: 100%;
  margin-top: 20px;
  padding: 15px;
  font-size: 1rem;
}

@media screen and (max-width: 768px) {
  main {
    grid-template-columns: 1fr;
  }
}

@media (any-hover: hover) and (pointer: fine) {
  .card:hover {
    transform: translateY(-5px);
  }

  button:hover {
    opacity: 0.9;
  }

  .remove:hover {
    background: transparent;
    color: red;
  }
}