:root {
  color-scheme: dark;
  --accent: #d8dde6;
  --accent-2: #9aa4b2;
  --glow: rgba(210, 216, 228, 0.55);
  --bg: radial-gradient(120% 120% at 70% 20%, #2b2f36 0%, #14171c 45%, #060708 100%);
  --text: #f7f7fb;
  --muted: rgba(247, 247, 251, 0.68);
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.14);
  --border: rgba(255, 255, 255, 0.18);
  --shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Tahoma, Arial, "Segoe UI", sans-serif;
  background: #07080b;
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.cars-app {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  transition: background 600ms ease;
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 24px clamp(18px, 4vw, 64px) 48px;
  isolation: isolate;
}

.hero__aurora,
.hero__grid {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero__aurora {
  background:
    radial-gradient(circle at 20% 25%, var(--glow), transparent 30%),
    radial-gradient(circle at 80% 18%, color-mix(in srgb, var(--accent) 38%, transparent), transparent 28%),
    radial-gradient(circle at 50% 80%, rgba(255,255,255,0.08), transparent 34%);
  filter: blur(10px);
  opacity: .8;
}
.hero__grid {
  z-index: -1;
  opacity: .18;
  background-image:
    linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black 10%, transparent 92%);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  position: relative;
  z-index: 5;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--panel-strong), rgba(255,255,255,.04));
  box-shadow: inset 0 0 18px rgba(255,255,255,.06), 0 0 28px var(--glow);
  color: var(--accent);
  font-size: 24px;
  font-weight: 900;
}
.brand strong { display: block; font-size: 16px; letter-spacing: .4px; }
.brand small { display: block; color: var(--muted); font-size: 11px; margin-top: 3px; }

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(14px);
}
.nav a {
  padding: 9px 18px;
  border-radius: 999px;
  color: var(--muted);
  transition: 220ms ease;
}
.nav a:hover { color: var(--text); background: var(--panel); }

.call,
.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  min-height: 46px;
  padding: 0 19px;
  font-weight: 800;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}
.call,
.primary-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #050608;
  box-shadow: 0 16px 42px var(--glow);
}
.ghost-btn {
  background: rgba(255,255,255,.06);
  color: var(--text);
}
.call:hover,
.primary-btn:hover,
.ghost-btn:hover { transform: translateY(-2px); }
.call__icon { font-size: 18px; }

.slider {
  position: relative;
  margin-top: clamp(34px, 7vh, 82px);
}
.slide-layout {
  display: grid;
  grid-template-columns: minmax(280px, .92fr) minmax(360px, 1.25fr) minmax(260px, .78fr);
  align-items: center;
  gap: clamp(20px, 4vw, 58px);
}
.copy,
.specs,
.contact,
.models {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255,255,255,.11), rgba(255,255,255,.045));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.copy {
  padding: clamp(22px, 4vw, 36px);
  border-radius: 34px;
  transform-style: preserve-3d;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-weight: 900;
  letter-spacing: .2px;
}
.copy h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 72px);
  line-height: 1.05;
  letter-spacing: -1.2px;
}
.tagline {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 23px);
  line-height: 1.8;
}
.price-card {
  margin-top: 28px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(0,0,0,.22);
}
.price-card span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.price-card strong { display: block; color: var(--accent); font-size: clamp(20px, 2.1vw, 28px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.stage {
  position: relative;
  min-height: clamp(360px, 48vw, 620px);
  display: grid;
  place-items: center;
  perspective: 1100px;
  cursor: grab;
  user-select: none;
}
.stage:active { cursor: grabbing; }
.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(2px);
  opacity: .68;
  animation: floatOrb 8s ease-in-out infinite alternate;
}
.orb--one {
  width: clamp(210px, 28vw, 420px);
  height: clamp(210px, 28vw, 420px);
  background: radial-gradient(circle, var(--glow), transparent 68%);
  top: 7%;
  right: 7%;
}
.orb--two {
  width: clamp(150px, 18vw, 290px);
  height: clamp(150px, 18vw, 290px);
  background: radial-gradient(circle, rgba(255,255,255,.14), transparent 66%);
  bottom: 12%;
  left: 10%;
  animation-delay: -2s;
}
.platform {
  position: absolute;
  width: min(72vw, 720px);
  height: min(23vw, 210px);
  bottom: 14%;
  border-radius: 50%;
  background:
    radial-gradient(ellipse at center, color-mix(in srgb, var(--accent) 28%, transparent) 0%, rgba(255,255,255,.08) 35%, transparent 70%);
  transform: rotateX(70deg);
  filter: blur(.2px);
}
.platform::after {
  content: "";
  position: absolute;
  inset: 22%;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: inherit;
  box-shadow: 0 0 60px var(--glow);
}
.car-image {
  position: relative;
  z-index: 2;
  width: min(85vw, 850px);
  max-height: 520px;
  object-fit: contain;
  filter: drop-shadow(0 34px 42px rgba(0,0,0,.58)) drop-shadow(0 0 42px var(--glow));
  transform: translateY(0) rotateY(-8deg) rotateX(2deg);
  animation: floatCar 4.8s ease-in-out infinite;
  transition: opacity 260ms ease, transform 420ms ease, filter 420ms ease;
}
.car-image.is-switching {
  opacity: 0;
  transform: translateY(20px) scale(.94) rotateY(10deg);
}

.specs {
  padding: 24px;
  border-radius: 30px;
}
.specs h2 {
  margin: 0 0 17px;
  font-size: 22px;
}
.spec-grid {
  display: grid;
  gap: 12px;
}
.spec-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(0,0,0,.18);
}
.spec-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-size: 20px;
}
.spec-item small { display: block; color: var(--muted); margin-bottom: 5px; }
.spec-item strong { display: block; font-size: 15px; }

.arrow {
  position: absolute;
  z-index: 8;
  top: 50%;
  transform: translateY(-50%);
  width: 54px;
  height: 54px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  color: var(--text);
  backdrop-filter: blur(14px);
  font-size: 42px;
  line-height: 1;
  cursor: pointer;
  transition: 220ms ease;
}
.arrow:hover { background: var(--accent); color: #050608; box-shadow: 0 0 30px var(--glow); }
.arrow--right { right: 0; }
.arrow--left { left: 0; }

.progress {
  width: min(720px, 80vw);
  height: 4px;
  margin: 32px auto 0;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.16);
}
.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 24px var(--glow);
}
.progress span.is-running { animation: progress 2.8s linear forwards; }

.models,
.contact {
  margin: 0 clamp(18px, 4vw, 64px) 48px;
  border-radius: 34px;
}
.models { padding: clamp(22px, 4vw, 36px); }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.section-title p { margin: 0; color: var(--accent); font-weight: 900; }
.section-title h2 { margin: 0; font-size: clamp(24px, 3vw, 40px); }
.thumbs {
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 14px;
}
.thumb {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(0,0,0,.18);
  color: var(--text);
  padding: 12px;
  cursor: pointer;
  text-align: right;
  transition: 220ms ease;
}
.thumb:hover,
.thumb.is-active {
  border-color: color-mix(in srgb, var(--accent) 68%, white 0%);
  background: color-mix(in srgb, var(--accent) 16%, rgba(0,0,0,.22));
  transform: translateY(-3px);
}
.thumb img {
  width: 100%;
  height: 84px;
  object-fit: contain;
  filter: drop-shadow(0 14px 15px rgba(0,0,0,.4));
}
.thumb strong { display: block; margin-top: 8px; font-size: 13px; }
.thumb small { display: block; color: var(--muted); margin-top: 4px; }

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: clamp(22px, 4vw, 38px);
}
.contact p { margin: 0 0 8px; color: var(--muted); }
.contact h2 { margin: 0; font-size: clamp(22px, 3vw, 40px); }

@keyframes floatCar {
  0%, 100% { transform: translateY(0) rotateY(-8deg) rotateX(2deg); }
  50% { transform: translateY(-18px) rotateY(-3deg) rotateX(3deg); }
}
@keyframes floatOrb {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(28px, -22px, 0) scale(1.06); }
}
@keyframes progress {
  from { width: 0; }
  to { width: 100%; }
}

@media (max-width: 1180px) {
  .slide-layout { grid-template-columns: 1fr; }
  .stage { order: -1; min-height: 430px; }
  .spec-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arrow { top: 36%; }
  .thumbs { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
}
@media (max-width: 720px) {
  .hero { padding: 18px 14px 34px; }
  .topbar { align-items: stretch; }
  .nav { display: none; }
  .call { padding: 0 13px; font-size: 13px; }
  .brand strong { font-size: 14px; }
  .stage { min-height: 340px; }
  .car-image { width: 105vw; }
  .copy, .specs { border-radius: 24px; }
  .spec-grid, .thumbs { grid-template-columns: 1fr; }
  .arrow { width: 46px; height: 46px; font-size: 34px; top: 28%; }
  .contact { flex-direction: column; align-items: flex-start; }
}