:root {
  color-scheme: light;
  --ink: #111111;
  --muted: #606266;
  --line: #dedede;
  --surface: #ffffff;
  --soft: #f4f4f2;
  --accent: #b12b2b;
  --accent-dark: #6f1515;
  --shadow: 0 24px 60px rgba(17, 17, 17, 0.12);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

button,
a {
  font: inherit;
}

img {
  display: block;
  width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 18px;
  padding: 0;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
  backdrop-filter: blur(18px);
}

main {
  min-height: calc(100vh - 18px);
}

.list-view,
.detail-view {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(44px, 8vw, 96px) clamp(20px, 5vw, 36px);
}

.section-heading {
  max-width: 900px;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 62px);
  font-weight: 650;
  line-height: 1.08;
}

#list-title {
  display: grid;
  gap: 10px;
}

#list-title span:last-child {
  color: var(--muted);
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 500;
}

.car-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 32px) clamp(18px, 2.4vw, 28px);
}

.car-card {
  display: grid;
  gap: 12px;
  padding: 0;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.card-gallery {
  display: grid;
  gap: 7px;
}

.card-image-wrap {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--soft);
  aspect-ratio: 16 / 9;
}

.number-badge {
  display: inline-grid;
  min-height: 28px;
  place-items: center;
  padding: 4px 10px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(17, 17, 17, 0.14);
  backdrop-filter: blur(14px);
}

.card-number {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
}

.card-image-wrap img,
.card-thumb img {
  height: 100%;
  object-fit: cover;
  transition: opacity 220ms ease, transform 420ms ease;
}

.card-thumbs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.card-thumb {
  display: block;
  overflow: hidden;
  background: var(--soft);
  aspect-ratio: 4 / 3;
}

.car-card:hover .card-image-wrap img,
.car-card:focus-visible .card-image-wrap img {
  transform: scale(1.035);
}

.car-card:hover .card-thumb img,
.car-card:focus-visible .card-thumb img {
  opacity: 0.86;
}

.car-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 8px;
}

.card-meta {
  display: grid;
  min-height: 50px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.card-title {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 650;
  line-height: 1.25;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin-bottom: 28px;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.back-button span:first-child {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #ffffff;
  background: var(--ink);
  border-radius: 50%;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.8fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.gallery-item {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  cursor: zoom-in;
  background: var(--soft);
  border: 0;
  aspect-ratio: 16 / 9;
}

.gallery-item img {
  height: 100%;
  object-fit: contain;
  transition: transform 320ms ease, opacity 220ms ease;
}

.gallery-item:hover img,
.gallery-item:focus-visible img {
  transform: scale(1.025);
}

.gallery-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.spec-panel {
  position: sticky;
  top: 104px;
  padding: clamp(24px, 4vw, 36px) 0;
  border-top: 2px solid var(--ink);
}

.spec-panel h1 {
  display: grid;
  gap: 14px;
  justify-items: start;
  margin-bottom: 30px;
  font-size: clamp(34px, 5vw, 54px);
}

.detail-number {
  min-height: 30px;
  padding-inline: 12px;
  color: var(--accent-dark);
  background: transparent;
  border-color: rgba(111, 21, 21, 0.35);
}

.spec-list {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.spec-list div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.spec-list dt {
  color: var(--muted);
  font-size: 13px;
}

.spec-list dd {
  margin: 0;
  font-weight: 600;
}

.options-block {
  margin-top: 34px;
  padding: 26px;
  color: #ffffff;
  background: var(--ink);
}

.options-block h2 {
  margin: 0 0 16px;
  font-size: 18px;
}

.options-block ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 18px;
}

.options-block li::marker {
  color: var(--accent);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(44px, 0.12fr) minmax(0, 1fr) minmax(44px, 0.12fr);
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  padding: clamp(18px, 4vw, 48px);
  background: rgba(8, 8, 8, 0.88);
}

.lightbox-frame {
  display: grid;
  gap: 14px;
  margin: 0;
}

.lightbox-frame img {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
}

.lightbox-frame figcaption {
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  text-align: center;
}

.lightbox-close,
.lightbox-nav {
  display: grid;
  place-items: center;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.24);
  cursor: pointer;
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  font-size: 30px;
  line-height: 1;
}

.lightbox-nav {
  width: 48px;
  height: 72px;
  font-size: 44px;
}

.lightbox-close:hover,
.lightbox-nav:hover,
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  outline: none;
}

.is-lightbox-open {
  overflow: hidden;
}

[hidden] {
  display: none !important;
}

@media (max-width: 820px) {
  .site-header {
    min-height: 14px;
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }

  .spec-panel {
    position: static;
    padding-top: 12px;
  }
}

@media (max-width: 1040px) {
  .car-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .list-view,
  .detail-view {
    padding-inline: 18px;
  }

  .car-grid {
    grid-template-columns: 1fr;
  }

  .spec-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .options-block {
    padding: 22px;
  }

  .lightbox {
    grid-template-columns: 1fr;
    padding: 60px 16px 22px;
  }

  .lightbox-frame {
    grid-row: 1;
  }

  .lightbox-nav {
    position: fixed;
    top: 50%;
    width: 42px;
    height: 58px;
    transform: translateY(-50%);
  }

  .lightbox-prev {
    left: 10px;
  }

  .lightbox-next {
    right: 10px;
  }
}