/* ============================================================
   F1 — Theme tokens & layout shell
   ============================================================ */
:root {
  /* Surfaces */
  --bg: #0a0a0a;
  --surface: #141416;
  --surface-2: #1c1c20;
  --border: #26262b;

  /* Text */
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-faint: #6b6b73;

  /* Accent (overridden per car via inline --accent) */
  --accent-default: #c8c8c8;

  /* Type */
  --font-body: 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Sora', 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;

  /* Radius */
  --radius-sm: 4px;

  /* Layout */
  --content-max: 1360px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, video { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

/* ---- F9: accessibility ---- */
:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 1100;
  background: var(--surface-2);
  color: var(--text);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }
#main:focus { outline: none; }

.wrap {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(var(--space-3), 4vw, var(--space-6));
}

/* ============================================================
   Header / masthead / nav
   ============================================================ */
.site-header { padding-block: var(--space-5) var(--space-4); }
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.brand-group {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}
.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 1rem + 1.4vw, 1.75rem);
  letter-spacing: 0.22em;
}
.brand-sub {
  color: var(--text-faint);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.28em;
}
.main-nav {
  display: flex;
  gap: clamp(var(--space-3), 2.5vw, var(--space-5));
}
.main-nav a {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  transition: color 0.2s ease;
}
.main-nav a:hover { color: var(--text); }

/* ---- Section header with rule ---- */
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-block: var(--space-4) var(--space-6);
}
.section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  white-space: nowrap;
}
.section-head .rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---- Footer ---- */
.site-footer {
  margin-top: var(--space-6);
  padding-block: var(--space-5);
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ---- Async states (F2) ---- */
.state {
  color: var(--text-muted);
  padding-block: var(--space-6);
  text-align: center;
}
.state[data-state="error"] { color: #f87171; }

/* ============================================================
   Portfolio list
   ============================================================ */
.portfolio {
  display: grid;
  gap: clamp(var(--space-6), 8vw, 7rem);
  padding-bottom: var(--space-5);
}

/* F8: skip rendering off-screen cards (keep the first for fast LCP). */
.portfolio > .car-card:not(:first-child) {
  content-visibility: auto;
  contain-intrinsic-size: auto 620px;
}

/* ============================================================
   F3/F7 — Car card  (mobile-first: stacked)
   ============================================================ */
.car-card {
  display: grid;
  gap: var(--space-4);
}

/* ---- Hero (left) ---- */
.car-hero {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface);
}
.car-hero-img,
.car-hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* F4/F5 — video fades in over the poster when playing. */
.car-hero-video {
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.car-hero.is-playing .car-hero-video { opacity: 1; }

/* ---- Detail (right) ---- */
.car-detail {
  display: flex;
  flex-direction: column;
}
.car-kicker {
  color: var(--accent, var(--accent-default));
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  margin-bottom: var(--space-2);
}
.car-model {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 1rem + 7vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.car-accent-line {
  width: 64px;
  height: 4px;
  background: var(--accent, var(--accent-default));
  margin-block: var(--space-3) var(--space-4);
}
.car-tagline {
  color: var(--text-muted);
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  max-width: 42ch;
}

/* ---- Thumbnails ---- */
.car-thumbs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  list-style: none;
  margin-top: clamp(var(--space-4), 4vh, var(--space-5));
}
.car-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface);
}
.car-thumb-btn {
  position: absolute;
  inset: 0;
  display: block;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.car-thumb-btn:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: -2px;
}
.car-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.car-thumb-btn:hover img { transform: scale(1.05); }
.car-thumb-label {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  padding: var(--space-4) var(--space-3) var(--space-2);
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  pointer-events: none;
}

/* ============================================================
   F7 — Desktop: hero left, detail right (matches reference)
   ============================================================ */
@media (min-width: 860px) {
  .car-card {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4.5rem);
    align-items: stretch;
  }
  /* Hero stretches to match the detail column's height. */
  .car-hero {
    aspect-ratio: auto;
    min-height: 420px;
  }
  .car-detail { justify-content: center; }
}

@media (max-width: 600px) {
  .car-model { font-size: clamp(2.5rem, 12vw, 3.5rem); }
}

/* ============================================================
   F6 — Lightbox
   ============================================================ */
.lightbox-locked { overflow: hidden; }
.lightbox[hidden] { display: none; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.94);
  padding: clamp(1rem, 4vw, 3rem);
}
.lightbox-figure {
  margin: 0;
  max-width: min(92vw, 1400px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.lightbox-img {
  max-width: 100%;
  max-height: 82vh;
  width: auto;
  height: auto;
  object-fit: contain;
}
.lightbox-caption {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}
.lightbox-counter {
  position: absolute;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-faint);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(20, 20, 22, 0.7);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.lightbox-close { top: var(--space-4); right: var(--space-4); width: 44px; height: 44px; font-size: 1.6rem; }
.lightbox-prev, .lightbox-next { top: 50%; transform: translateY(-50%); width: 52px; height: 52px; font-size: 2rem; }
.lightbox-prev { left: var(--space-3); }
.lightbox-next { right: var(--space-3); }
.lightbox-close:focus-visible,
.lightbox-prev:focus-visible,
.lightbox-next:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }
.lightbox-prev[hidden], .lightbox-next[hidden] { display: none; }

@media (max-width: 600px) {
  .lightbox-prev, .lightbox-next { width: 44px; height: 44px; font-size: 1.6rem; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .car-hero-video { display: none; transition: none; }
  .car-thumb img { transition: none; }
  .skip-link { transition: none; }
  .main-nav a { transition: none; }
}