:root {
  --bg: #0a0a0d;
  --bg-soft: radial-gradient(circle at 50% -10%, #202025 0%, #0a0a0d 55%);
  --panel: #151519;
  --panel-border: rgba(255, 255, 255, 0.1);
  --accent: #d83f2f;
  --accent-2: #c7c2b6;
  --text: #f5f5f7;
  --text-dim: #aaa7a2;
  --muted: #737078;
  --radius-lg: 8px;
  --radius-md: 6px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg-soft), var(--bg);
  background-attachment: fixed;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.site-header {
  text-align: center;
  padding: 3.25rem 1rem 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.05;
  background: linear-gradient(120deg, var(--text) 18%, #e9e5dc 54%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0.6rem 0 0;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 600;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

/* Slideshow */

.slideshow {
  margin-bottom: 1.75rem;
}

.slideshow-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

#slideshow-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(20, 20, 26, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 1.3rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.nav-btn:hover {
  background: rgba(255, 59, 59, 0.25);
  border-color: rgba(255, 59, 59, 0.5);
  transform: translateY(-50%) scale(1.06);
}

.nav-btn:focus-visible,
.thumbnail-button:focus-visible,
.overlay-close:focus-visible,
.overlay-nav:focus-visible {
  outline: 3px solid rgba(216, 63, 47, 0.9);
  outline-offset: 3px;
}

.nav-prev {
  left: 16px;
}

.nav-next {
  right: 16px;
}

.slide-counter {
  position: absolute;
  bottom: 14px;
  right: 16px;
  background: rgba(20, 20, 26, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Details */

.details {
  margin-bottom: 1.75rem;
  padding: 2rem 2.25rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.details-copy {
  max-width: 760px;
}

.details-headline {
  margin: 0 0 0.85rem;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text);
}

.details-description {
  margin: 0 0 1.5rem;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 65ch;
  font-size: 0.98rem;
}

.spec-grid {
  margin: 0 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  background: var(--panel-border);
}

.spec-grid div {
  min-width: 0;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.035);
}

.spec-grid dt {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spec-grid dd {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 650;
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem 1.5rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.3rem;
  color: var(--text);
  line-height: 1.5;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}

.inquiry-panel {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.045);
  border-radius: var(--radius-md);
}

.inquiry-panel p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.55;
}

/* Gallery */

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.gallery h2 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin: 0;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
  gap: 10px;
}

.thumbnail-button {
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
}

.thumbnail-button img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  opacity: 0.7;
  transition: opacity 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  display: block;
}

.thumbnail-button:hover img {
  opacity: 1;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.7);
}

.empty-state {
  color: var(--text-dim);
  line-height: 1.6;
}

.overlay-open {
  overflow: hidden;
}

.photo-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(56px, 1fr) minmax(0, 1080px) minmax(56px, 1fr);
  align-items: center;
  gap: 1rem;
  padding: 4.5rem 1.5rem 2rem;
  background: rgba(5, 5, 7, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.photo-overlay[hidden] {
  display: none;
}

.overlay-frame {
  grid-column: 2;
  margin: 0;
  min-width: 0;
  text-align: center;
}

#overlay-image {
  display: block;
  width: 100%;
  max-height: calc(100vh - 8rem);
  object-fit: contain;
  border-radius: var(--radius-lg);
  background: #000;
  box-shadow: 0 24px 80px -24px rgba(0, 0, 0, 0.9);
}

.overlay-counter {
  margin-top: 0.85rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.overlay-close,
.overlay-nav {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(20, 20, 26, 0.72);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.overlay-close:hover,
.overlay-nav:hover {
  background: rgba(216, 63, 47, 0.28);
  border-color: rgba(216, 63, 47, 0.58);
}

.overlay-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 2rem;
  line-height: 1;
}

.overlay-nav {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  font-size: 1.4rem;
}

.overlay-prev {
  grid-column: 1;
  justify-self: end;
}

.overlay-next {
  grid-column: 3;
  justify-self: start;
}

.site-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

@media (max-width: 760px) {
  .spec-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .photo-overlay {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr auto;
    gap: 1rem;
    padding: 4.25rem 1rem 1.25rem;
  }

  .overlay-frame {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  #overlay-image {
    max-height: calc(100vh - 11rem);
  }

  .overlay-prev,
  .overlay-next {
    grid-row: 2;
    justify-self: center;
  }

  .overlay-prev {
    grid-column: 1;
  }

  .overlay-next {
    grid-column: 2;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding-top: 2.5rem;
  }

  main {
    padding-inline: 1rem;
  }

  .details {
    padding: 1.5rem 1.5rem;
  }

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

  .nav-btn {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}