:root {
  /* Color */
  --white: #f5f5f7; /* 페이지 배경색 */
  --black: #1d1d1f; /* 기본 텍스트 및 라이트 모드 버튼 배경 */
  --red: #d11719; /* 강조 텍스트 (Series 9) */
  --gray: #86868b; /* 보조 텍스트 (출시일 등) */
  --blue-100: #2997ff; /* 다크 모드 보조 버튼 텍스트 */
  --blue-200: #0077ed;
  --blue-300: #0071e3; /* 다크 모드 메인 버튼 배경 */
  --blue-400: #006edb;

  /* Box Size */
  --size: 36.25rem; /* 580px - 카드 높이 */

  /* Text Size */
  --xx-small-text: 0.75rem; /* 12px */
  --x-small-text: 0.875rem; /* 14px - 버튼 텍스트 */
  --small-text: 1.0625rem; /* 17px - 보조 설명 */
  --base-text: 1.1875rem; /* 19px - 모바일 설명 */
  --medium-text: 1.3125rem; /* 21px - 데스크탑 설명 */
  --large-text: 2rem; /* 32px - 모바일 제목 */
  --extra-large-text: 2.5rem; /* 40px - 데스크탑 제목 */

  /* Spacing */
  --x-small-spacing: 0.5rem; /* 8px - 버튼 상하 패딩 */
  --small-spacing: 0.75rem; /* 12px - 버튼 좌우 패딩, 요소 간 간격 */
  --base-spacing: 1rem; /* 16px - 버튼 사이 간격 */
  --large-spacing: 2.5rem; /* 40px - 모바일 상단 여백 */
  --extra-large-spacing: 3.75rem; /* 60px - 데스크탑 상단 여백 */

  --line-normal: 1.5; /* 줄간격 */
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--white);
  color: var(--black);
  display: flex;
  justify-content: center;
  padding-top: 40px;
  padding-bottom: 40px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 980px;
  width: 90%;
  margin: 0 auto;
}

.card {
  height: var(--size);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  background-color: #fff;
}

.card:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.card-content {
  margin-top: var(--large-spacing);
  z-index: 2;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--small-spacing);
}

.product-name {
  font-size: var(--large-text);
  font-weight: 600;
  margin: 0;
  line-height: 1.1;
}

.product-desc {
  font-size: var(--base-text);
  font-weight: 400;
  margin: 0;
  line-height: var(--line-normal);
}

.product-desc-gray {
  color: var(--gray);
  font-size: var(--small-text);
  margin-top: 0;
}

.series-text {
  color: var(--red) !important;
  font-weight: 600;
  font-size: var(--small-text);
}

.card.light {
  background-color: #fff;
  color: var(--black);
}
.card.light .product-name,
.card.light .product-desc {
  color: var(--black);
}

.card.dark {
  background-color: #000;
  color: var(--white);
}
.card.dark .product-name,
.card.dark .product-desc {
  color: var(--white);
}

.cta-links {
  display: flex;
  gap: var(--base-spacing);
  justify-content: center;
  margin-top: var(--x-small-spacing);
  position: relative;
  z-index: 10;
}

.cta-links span {
  font-size: var(--x-small-text);
  padding: var(--x-small-spacing) var(--small-spacing);
  border-radius: 980px;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1.2;
}

.cta-links span:hover {
  opacity: 0.8;
}

.card.dark .cta-links span:first-child {
  background-color: var(--blue-300);
  color: #fff;
}
.card.dark .cta-links span:last-child {
  background-color: transparent;
  color: var(--blue-100);
  border: 1px solid var(--blue-100);
  padding: calc(var(--x-small-spacing) - 1px) calc(var(--small-spacing) - 1px);
}

.card.light .cta-links span:first-child {
  background-color: var(--black);
  color: #fff;
}
.card.light .cta-links span:last-child {
  background-color: transparent;
  color: var(--black);
  border: 1px solid var(--black);
  padding: calc(var(--x-small-spacing) - 1px) calc(var(--small-spacing) - 1px);
}

.card-image {
  background-size: cover;
  background-position: center bottom;
  background-repeat: no-repeat;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  transition: transform 0.5s ease;
}

.card:hover .card-image {
  transform: scale(1.03);
}

.img-iphone-pro {
  background-image: url('../products/iphone15_pro.jpeg');
  background-image: image-set(url('../products/iphone15_pro.jpeg') 1x, url('../products/iphone15_pro_2x.jpeg') 2x);
}
.img-ipad-pro {
  background-image: url('../products/ipad_pro.jpeg');
  background-image: image-set(url('../products/ipad_pro.jpeg') 1x, url('../products/ipad_pro_2x.jpeg') 2x);
}
.img-ipad-air {
  background-image: url('../products/ipad_air.jpeg');
  background-image: image-set(url('../products/ipad_air.jpeg') 1x, url('../products/ipad_air_2x.jpeg') 2x);
}
.img-iphone-15 {
  background-image: url('../products/iphone15.jpeg');
  background-image: image-set(url('../products/iphone15.jpeg') 1x, url('../products/iphone15_2x.jpeg') 2x);
}
.img-watch {
  background-image: url('../products/apple_watch.jpeg');
  background-image: image-set(url('../products/apple_watch.jpeg') 1x, url('../products/apple_watch_2x.jpeg') 2x);
}
.img-macbook {
  background-image: url('../products/macbook_air.jpeg');
  background-image: image-set(url('../products/macbook_air.jpeg') 1x, url('../products/macbook_air_2x.jpeg') 2x);
}
.img-airpods {
  background-image: url('../products/airpods_pro.jpeg');
  background-image: image-set(url('../products/airpods_pro.jpeg') 1x, url('../products/airpods_pro_2x.jpeg') 2x);
}

@media (min-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .card:nth-child(1),
  .card:nth-child(2),
  .card:nth-child(3) {
    grid-column: span 6;
  }
  .card:nth-child(n + 4) {
    grid-column: span 3;
  }

  .card-content {
    margin-top: var(--extra-large-spacing);
  }
  .product-name {
    font-size: var(--extra-large-text);
  }
  .product-desc {
    font-size: var(--medium-text);
  }

  .img-iphone-pro {
    background-image: url('../products/iphone15_pro_wide.jpeg');
    background-image: image-set(url('../products/iphone15_pro_wide.jpeg') 1x, url('../products/iphone15_pro_wide_2x.jpeg') 2x);
    background-position: center bottom;
  }
}

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
  .card {
    grid-column: span 1 !important;
    height: 480px;
  }
}