/* ============================================================
   SignalHand — style.css
   Dark amber premium product site
   ============================================================ */

/* ── Custom properties ───────────────────────────────────────── */
:root {
  --bg:          #050505;
  --bg-1:        #0a0a0a;
  --bg-2:        #0f0f0f;
  --bg-card:     #111111;
  --amber:       #F5A623;
  --amber-dim:   rgba(245, 166, 35, 0.15);
  --amber-glow:  rgba(245, 166, 35, 0.25);
  --text:        #F0EDE8;
  --text-muted:  rgba(240, 237, 232, 0.45);
  --text-sub:    rgba(240, 237, 232, 0.7);
  --border:      rgba(240, 237, 232, 0.07);
  --border-amber: rgba(245, 166, 35, 0.2);

  --f-display: 'Bebas Neue', sans-serif;
  --f-body:    'DM Sans', sans-serif;
  --f-mono:    'Space Mono', monospace;

  --topbar-h:  60px;
  --sidenav-w: 72px;
  --radius:    4px;
  --trans:     0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--topbar-h);
  background: var(--bg);
  color: var(--text);
  cursor: none;
}
body {
  font-family: var(--f-body);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: none; border: none; background: none; }
ul { list-style: none; }
em { font-style: normal; color: var(--amber); }
input, textarea, select { font-family: var(--f-body); }

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--amber-dim); }

/* ── Grain overlay ───────────────────────────────────────────── */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='320'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='320' height='320' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-anim 0.6s steps(2) infinite;
}
@keyframes grain-anim {
  0%   { background-position: 0 0; }
  25%  { background-position: -20px -30px; }
  50%  { background-position: 25px 15px; }
  75%  { background-position: -10px 25px; }
  100% { background-position: 18px -18px; }
}

/* ── Custom cursor ───────────────────────────────────────────── */
.cursor-dot {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--amber);
  border-radius: 50%;
  top: 0; left: 0;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 10000;
  transition: width 0.2s, height 0.2s, background 0.2s;
  will-change: transform;
}
.cursor-ring {
  position: fixed;
  width: 34px;
  height: 34px;
  border: 1.5px solid rgba(245, 166, 35, 0.55);
  border-radius: 50%;
  top: 0; left: 0;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 10000;
  transition: width 0.25s ease, height 0.25s ease,
              border-color 0.25s ease, opacity 0.25s ease;
  will-change: transform;
}
.cursor-dot.is-hover  { width: 10px; height: 10px; }
.cursor-ring.is-hover {
  width: 60px; height: 60px;
  border-color: rgba(245, 166, 35, 0.9);
}

/* ── Top bar ─────────────────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  background: rgba(5, 5, 5, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--trans);
}
.topbar-logo {
  font-family: var(--f-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  color: var(--text);
}
.topbar-logo strong { color: var(--amber); font-weight: 400; }
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}
.topbar-nav a {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--trans);
}
.topbar-nav a:hover { color: var(--text); }
.topbar-cta {
  background: var(--amber) !important;
  color: #050505 !important;
  padding: 0.45rem 1.25rem;
  font-weight: 700 !important;
  transition: opacity var(--trans) !important;
}
.topbar-cta:hover { opacity: 0.88 !important; }

/* Hamburger */
.topbar-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.topbar-menu-toggle span {
  width: 20px; height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: transform var(--trans), opacity var(--trans);
}
.topbar-menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.topbar-menu-toggle.open span:nth-child(2) { opacity: 0; }
.topbar-menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 499;
  background: rgba(5, 5, 5, 0.98);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding-top: var(--topbar-h);
}
.mobile-menu.open { display: flex; }
.mm-link {
  font-family: var(--f-display);
  font-size: 2.5rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  transition: color var(--trans);
}
.mm-link:hover { color: var(--amber); }
.mm-cta { color: var(--amber) !important; }

/* ── Side nav ────────────────────────────────────────────────── */
.sidenav {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 400;
  padding: 1rem 0;
}
.sidenav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidenav-item { position: relative; }
.sidenav-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.sidenav-thumb {
  width: 52px;
  height: 36px;
  overflow: hidden;
  position: relative;
  border-left: 2px solid transparent;
  transition: border-color var(--trans), transform var(--trans);
}
.sidenav-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 5, 0.4);
  transition: opacity var(--trans);
}
.sidenav-item:hover .sidenav-thumb::after { opacity: 0; }
.sidenav-item:hover .sidenav-thumb { transform: scaleX(1.04); }
.sidenav-item.active .sidenav-thumb {
  border-left-color: var(--amber);
  box-shadow: -4px 0 18px rgba(245, 166, 35, 0.3);
}
.sidenav-item.active .sidenav-thumb::after { opacity: 0.15; }

/* thumb backgrounds */
.st-inner {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.st-hero    { background: linear-gradient(135deg, #0f0800, #060606); }
.st-details { background: #0a0a0a; }
.st-oncar   { background: linear-gradient(135deg, #080a08, #060606); }
.st-how     { background: linear-gradient(135deg, #0a0800, #060606); }
.st-modes   { background: linear-gradient(135deg, #08060f, #060606); }
.st-videos  { background: linear-gradient(135deg, #05080f, #060606); }
.st-faq     { background: #0a0906; }
.st-order   { background: linear-gradient(135deg, #0d0800, #060606); }
.st-grid-dots {
  background-image: radial-gradient(circle, rgba(240,237,232,0.2) 1px, transparent 1px);
  background-size: 6px 6px;
  width: 100%; height: 100%;
}

/* Hover label */
.sidenav-label {
  position: absolute;
  right: calc(100% + 10px);
  background: var(--bg-1);
  color: var(--text-sub);
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 8px;
  white-space: nowrap;
  border: 1px solid var(--border-amber);
  opacity: 0;
  transform: translateX(6px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}
.sidenav-item:hover .sidenav-label,
.sidenav-item.active .sidenav-label {
  opacity: 1;
  transform: translateX(0);
}
.sidenav-item.active .sidenav-label { color: var(--amber); }

/* ── Container ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Sections ────────────────────────────────────────────────── */
.section {
  min-height: 100vh;
  position: relative;
  padding-top: var(--topbar-h);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* ── Section headers ─────────────────────────────────────────── */
.sec-header { margin-bottom: 4rem; }
.sec-tag {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
  display: block;
  margin-bottom: 1rem;
}
.sec-title {
  font-family: var(--f-display);
  font-size: clamp(3rem, 7vw, 6.5rem);
  letter-spacing: 0.02em;
  line-height: 0.95;
  color: var(--text);
}
.sec-sub {
  margin-top: 1.25rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  max-width: 420px;
  line-height: 1.7;
}
.sec-sub a { color: var(--amber); text-decoration: underline; text-underline-offset: 3px; }

/* ── Reveal animation ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.9rem 2.25rem;
  border-radius: var(--radius);
  transition: all var(--trans);
  white-space: nowrap;
}
.btn-amber {
  background: var(--amber);
  color: #050505;
  font-weight: 700;
  box-shadow: 0 0 0 0 var(--amber-glow);
}
.btn-amber:hover {
  background: #ffd04d;
  box-shadow: 0 0 32px var(--amber-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  border: 1px solid var(--border-amber);
  color: var(--text-muted);
}
.btn-ghost:hover {
  border-color: var(--amber);
  color: var(--text);
  background: var(--amber-dim);
}

/* ════════════════════════════════════════════════════════════
   SECTION 1 — HERO
   ════════════════════════════════════════════════════════════ */
.s-hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  padding: 0;
  justify-content: flex-start;
  align-items: flex-start;
  background: var(--bg);
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    105deg,
    rgba(5, 5, 5, 0.97) 0%,
    rgba(5, 5, 5, 0.85) 35%,
    rgba(5, 5, 5, 0.45) 65%,
    rgba(5, 5, 5, 0.1) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 3.5rem;
  padding-top: calc(var(--topbar-h) + 8vh);
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.hero-eyebrow {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(20px);
}
.hero-headline {
  font-family: var(--f-display);
  font-size: clamp(5rem, 12vw, 10.5rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--text);
  margin-bottom: 1.75rem;
  opacity: 0;
  transform: translateY(30px);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 440px;
  opacity: 0;
  transform: translateY(20px);
}
.hero-price {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 2.25rem;
  opacity: 0;
  transform: translateY(20px);
}
.price-num {
  font-family: var(--f-display);
  font-size: 3.5rem;
  color: var(--amber);
  letter-spacing: 0.02em;
  line-height: 1;
}
.price-currency {
  font-family: var(--f-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}
.price-tag {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-left: 0.5rem;
  border: 1px solid var(--border-amber);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}
.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 3.5rem;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  transform: translateY(10px);
}
.scroll-line-track {
  width: 1px;
  height: 56px;
  background: rgba(240, 237, 232, 0.1);
  position: relative;
  overflow: hidden;
}
.scroll-line-fill {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 100%;
  background: var(--amber);
  transform: scaleY(0);
  transform-origin: top;
  animation: scroll-pulse 2.4s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
.scroll-label {
  font-family: var(--f-mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
}

/* ════════════════════════════════════════════════════════════
   SECTION 2 — PRODUCT DESC
   ════════════════════════════════════════════════════════════ */
.tag {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: var(--amber);
  display: block;
  margin-bottom: 20px;
}
.product-desc-section {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 120px 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.pd-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.pd-left { display: flex; flex-direction: column; gap: 0; }
.pd-title {
  font-family: var(--f-display);
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.0;
  margin-bottom: 20px;
}
.pd-title .amber { color: var(--amber); }
.pd-body {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.75;
  max-width: 480px;
  margin-bottom: 40px;
}
.pd-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 36px;
}
.pd-spec {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  transition: border-color 0.2s;
}
.pd-spec:hover { border-color: var(--border-amber); }
.spec-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.pd-spec strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.pd-spec span {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--f-mono);
  letter-spacing: 0.5px;
  line-height: 1.5;
}
.pd-quote {
  background: linear-gradient(90deg, rgba(245,166,35,0.1), transparent);
  border-left: 3px solid var(--amber);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  font-size: 15px;
  color: #ccc;
  font-style: italic;
  line-height: 1.65;
}
.pd-right {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 500px;
}
.pd-glow {
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(245,166,35,0.15) 0%,
    transparent 70%);
  pointer-events: none;
  animation: pulse-glow 4s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%,100% { transform: scale(1); opacity: 0.7; }
  50%      { transform: scale(1.1); opacity: 1; }
}
.pd-product-img {
  width: 380px;
  max-width: 90%;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 0 48px rgba(245,166,35,0.35));
  animation: float-pd 6s ease-in-out infinite;
}
@keyframes float-pd {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}
.pd-stat-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
  justify-content: center;
  position: relative;
  z-index: 2;
}
.pd-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-amber);
  color: var(--amber);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  padding: 8px 16px;
  border-radius: 40px;
  transition: all 0.2s;
}
.pd-pill:hover {
  background: rgba(245,166,35,0.1);
  box-shadow: 0 0 16px rgba(245,166,35,0.2);
}

@media (max-width: 900px) {
  .product-desc-section { padding: 80px 24px; }
  .pd-inner { grid-template-columns: 1fr; gap: 48px; }
  .pd-right { min-height: auto; }
  .pd-product-img { width: 280px; }
  .pd-specs { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════════════════════
   SECTION 3 — DETAILS
   ════════════════════════════════════════════════════════════ */
.s-details {
  background: var(--bg-1);
  padding: 7rem 0;
}
.details-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
}
.detail-card {
  background: var(--bg-card);
  padding: 2rem 1.75rem;
  border: none;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease,
              background var(--trans);
}
.detail-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transition: transform var(--trans);
  transform-origin: left;
}
.detail-card:hover { background: #161616; }
.detail-card:hover::before { transform: scaleX(1); }
.detail-card.visible { opacity: 1; transform: translateY(0); }
.detail-icon {
  font-size: 2rem;
  margin-bottom: 1.25rem;
  display: block;
}
.detail-num {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--amber);
  opacity: 0.7;
  margin-bottom: 0.5rem;
}
.detail-name {
  font-family: var(--f-display);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 0.6rem;
  line-height: 1.1;
}
.detail-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.detail-img {
  position: absolute;
  top: 0; right: 0;
  width: 80px; height: 80px;
  object-fit: cover;
  opacity: 0.08;
  transition: opacity var(--trans);
  pointer-events: none;
}
.detail-card:hover .detail-img { opacity: 0.14; }

/* ════════════════════════════════════════════════════════════
   SECTION 3 — ON THE CAR
   ════════════════════════════════════════════════════════════ */
.s-oncar {
  background: var(--bg);
  padding: 6rem 0 4rem;
  justify-content: flex-start;
}
.oncar-header { margin-bottom: 3rem; }
.car-strip {
  display: flex;
  gap: 3px;
  height: 52vh;
  min-height: 300px;
  overflow: hidden;
  padding: 0;
}
.car-img-panel {
  flex: 0.4;
  overflow: hidden;
  position: relative;
  cursor: none;
  transition: flex 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.car-img-panel.active { flex: 4; }
.car-img-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}
.car-img-panel:hover img { transform: scale(1.03); }
.car-img-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, #0d0d0d, #1a1a14);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
}
.car-panel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,5,5,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--trans);
}
.car-img-panel.active .car-panel-overlay { opacity: 1; }
.car-panel-num {
  position: absolute;
  bottom: 1rem;
  left: 1.25rem;
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: rgba(240, 237, 232, 0.5);
  opacity: 0;
  transition: opacity var(--trans);
}
.car-img-panel.active .car-panel-num { opacity: 1; }
.car-caption {
  padding: 2.5rem 0 1rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--border);
  margin-top: 2px;
}
.car-cap-title {
  font-family: var(--f-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: 0.04em;
  color: var(--text);
  transition: opacity 0.3s;
}
.car-cap-desc {
  max-width: 360px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  transition: opacity 0.3s;
}
.car-dots {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-shrink: 0;
}
.car-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--border-amber);
  transition: background var(--trans), transform var(--trans);
}
.car-dot.active {
  background: var(--amber);
  transform: scale(1.4);
}

/* ════════════════════════════════════════════════════════════
   SECTION 4 — HOW IT WORKS
   ════════════════════════════════════════════════════════════ */
.s-how {
  background: var(--bg-1);
  padding: 7rem 0;
}
.how-rows { display: flex; flex-direction: column; gap: 0; }
.how-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border);
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}
.how-row.visible { opacity: 1; transform: translateY(0); }
.how-row:last-child { border-bottom: 1px solid var(--border); }
.how-row--reverse .how-img { order: 2; }
.how-row--reverse .how-text { order: 1; }
.how-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-2);
}
.how-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  opacity: 0.8;
}
.how-row:hover .how-img img { transform: scale(1.04); }
.how-img-placeholder {
  width: 100%; height: 100%;
  min-height: 260px;
  background: linear-gradient(135deg, #111, #0d0d0d);
  display: flex;
  align-items: center;
  justify-content: center;
}
.how-text {
  padding: 3rem 3.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.how-step-num {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 1.25rem;
}
.how-title {
  font-family: var(--f-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: 0.03em;
  line-height: 1;
  color: var(--text);
  margin-bottom: 1rem;
}
.how-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 380px;
}

/* ════════════════════════════════════════════════════════════
   SECTION 5 — GESTURE MODES
   ════════════════════════════════════════════════════════════ */
.s-modes {
  background: var(--bg);
  padding: 7rem 0;
}
.modes-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.75rem 1.5rem;
  position: relative;
  transition: color var(--trans);
}
.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transition: transform var(--trans);
}
.tab-btn:hover { color: var(--text-sub); }
.tab-btn.active { color: var(--amber); }
.tab-btn.active::after { transform: scaleX(1); }
.modes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
}
.mode-card {
  background: var(--bg-card);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: background var(--trans), opacity 0.3s, transform 0.3s;
  opacity: 0;
  transform: scale(0.96);
}
.mode-card.visible { opacity: 1; transform: scale(1); }
.mode-card:hover { background: #161616; }
.mode-card.hidden-mode {
  display: none;
}
.mode-emoji {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
  display: block;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mode-card:hover .mode-emoji { transform: scale(1.15) rotate(-5deg); }
.mode-cat {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  color: var(--amber);
  opacity: 0.7;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.mode-name {
  font-family: var(--f-display);
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.mode-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.mode-chip {
  display: inline-block;
  margin-top: 0.75rem;
  font-family: var(--f-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--amber);
  background: var(--amber-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
}

/* ════════════════════════════════════════════════════════════
   SECTION 6 — VIDEOS
   ════════════════════════════════════════════════════════════ */
.s-videos {
  background: var(--bg-1);
  padding: 7rem 0;
}
.video-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 3px;
}
.video-col {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.video-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-2);
  cursor: none;
}
.video-card--lg  { aspect-ratio: 16 / 10; }
.video-card--sm  { flex: 1; aspect-ratio: 16 / 9; }
.video-thumb {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #111, #0d0d0d);
  transition: transform 0.5s ease;
}
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.vt-main   { background: linear-gradient(135deg, #141008, #0a0a05); }
.vt-install { background: linear-gradient(135deg, #08100c, #050a07); }
.vt-modes  { background: linear-gradient(135deg, #08080f, #050506); }
.video-card:hover .video-thumb { transform: scale(1.04); }
.play-btn-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.play-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(245, 166, 35, 0.9);
  color: #050505;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--trans), background var(--trans),
              box-shadow var(--trans);
}
.video-card--sm .play-btn { width: 40px; height: 40px; }
.video-card:hover .play-btn {
  transform: scale(1.12);
  background: var(--amber);
  box-shadow: 0 0 36px rgba(245, 166, 35, 0.5);
}
.video-meta {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(5,5,5,0.9) 0%, transparent 100%);
  z-index: 2;
}
.video-tag {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 0.35rem;
}
.video-title {
  font-family: var(--f-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--text);
}
.video-card--sm .video-title { font-size: 1rem; }
.video-duration {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-sub);
  background: rgba(5,5,5,0.7);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  z-index: 2;
}

/* ── Lightbox ─────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 8000;
  background: rgba(5, 5, 5, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  backdrop-filter: blur(12px);
  animation: lb-in 0.25s ease;
}
.lightbox[hidden] { display: none; }
@keyframes lb-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.lightbox-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  color: var(--text-muted);
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: color var(--trans), border-color var(--trans);
  z-index: 1;
}
.lightbox-close:hover { color: var(--amber); border-color: var(--amber); }
.lightbox-inner {
  width: 100%;
  max-width: 960px;
  aspect-ratio: 16 / 9;
}
.lightbox-video {
  width: 100%; height: 100%;
  background: #000;
  border-radius: var(--radius);
}

/* ════════════════════════════════════════════════════════════
   SECTION 7 — REVIEWS
   ════════════════════════════════════════════════════════════ */
.s-reviews {
  background: var(--bg-1);
  padding: 7rem 0;
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease,
              border-color var(--trans), background var(--trans);
}
.review-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--trans);
}
.review-card:hover { background: #161616; }
.review-card:hover::before { transform: scaleX(1); }
.review-card.visible { opacity: 1; transform: translateY(0); }

.review-stars {
  color: var(--amber);
  font-size: 0.85rem;
  letter-spacing: 3px;
  margin-bottom: 1rem;
}
.review-quote {
  font-size: 1.6rem;
  color: var(--amber);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 0.5rem;
  font-family: Georgia, serif;
}
.review-text {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  font-style: italic;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--amber-dim);
  border: 1px solid var(--border-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--amber);
  flex-shrink: 0;
}
.review-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}
.review-meta {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ════════════════════════════════════════════════════════════
   SECTION 8 — FAQ
   ════════════════════════════════════════════════════════════ */
.s-faq {
  background: var(--bg);
  padding: 7rem 0;
}
.faq-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}
.faq-inner .sec-header { margin-bottom: 0; position: sticky; top: calc(var(--topbar-h) + 2rem); }
.faq-list { display: flex; flex-direction: column; }
.faq-item {
  border-top: 1px solid var(--border);
  overflow: hidden;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  font-family: var(--f-display);
  font-size: 1.45rem;
  letter-spacing: 0.03em;
  color: var(--text);
  text-align: left;
  transition: color var(--trans);
}
.faq-q:hover { color: var(--amber); }
.faq-icon {
  width: 24px; height: 24px;
  border: 1px solid var(--border-amber);
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--amber);
  transition: transform var(--trans), background var(--trans);
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--amber-dim);
}
.faq-a {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
  padding-bottom: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              padding-bottom 0.45s ease;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding-bottom: 1.5rem;
}

/* ════════════════════════════════════════════════════════════
   SECTION 8 — ORDER
   ════════════════════════════════════════════════════════════ */
.s-order {
  background: var(--bg-1);
  padding: 7rem 0;
}
.order-layout {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 5rem;
  align-items: start;
}
.order-info { position: sticky; top: calc(var(--topbar-h) + 2rem); }
.order-title {
  font-family: var(--f-display);
  font-size: clamp(3rem, 7vw, 6rem);
  letter-spacing: 0.02em;
  line-height: 0.92;
  color: var(--text);
  margin-bottom: 2rem;
}
.order-product-img {
  aspect-ratio: 4 / 3;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.order-product-img img { width: 100%; height: 100%; object-fit: contain; padding: 1rem; }
.img-placeholder {
  background: linear-gradient(135deg, #111, #0d0d0d) !important;
}
.order-price-block { margin-bottom: 1.5rem; }
.order-price {
  font-family: var(--f-display);
  font-size: 3rem;
  color: var(--amber);
  letter-spacing: 0.02em;
}
.order-price span {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-family: var(--f-mono);
}
.order-ship {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--f-mono);
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}
.order-perks { display: flex; flex-direction: column; gap: 0.6rem; }
.order-perks li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.perk-check {
  color: var(--amber);
  font-size: 0.75rem;
  width: 18px; height: 18px;
  border: 1px solid var(--border-amber);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Form */
.order-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.form-header {
  padding: 2rem 2.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.form-title {
  font-family: var(--f-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.form-sub { font-size: 0.85rem; color: var(--text-muted); }
#order-form { padding: 2rem 2.5rem 2.5rem; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group--full { margin-bottom: 1rem; }
.form-group label {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.form-group input,
.form-group textarea,
.form-group select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  color: var(--text);
  font-size: 0.92rem;
  transition: border-color var(--trans), box-shadow var(--trans);
  outline: none;
  resize: none;
  -webkit-appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-dim);
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23F0EDE8' stroke-opacity='0.4' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  cursor: none;
}
.form-group select option { background: #111; }
.field-error {
  font-size: 0.72rem;
  color: #ff6b6b;
  min-height: 1rem;
  display: block;
}
.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select { border-color: #ff6b6b; }
.form-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  margin: 1rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.ft-label { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--text-muted); text-transform: uppercase; }
.ft-value { font-family: var(--f-display); font-size: 1.8rem; color: var(--amber); letter-spacing: 0.04em; }
.btn-submit {
  width: 100%;
  padding: 1.1rem;
  font-size: 0.82rem;
  position: relative;
  overflow: hidden;
  margin-bottom: 1rem;
}
.btn-spinner {
  display: none;
  width: 18px; height: 18px;
  border: 2px solid rgba(5,5,5,0.3);
  border-top-color: #050505;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-submit.loading .btn-text { display: none; }
.btn-submit.loading .btn-spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
.form-fine {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}
.form-fine a { color: var(--amber); text-decoration: underline; text-underline-offset: 2px; }
.form-success, .form-error-banner {
  margin: 1.5rem 2.5rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
}
.form-success {
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid var(--border-amber);
}
.success-icon {
  font-size: 2rem;
  color: var(--amber);
  margin-bottom: 0.5rem;
}
.form-success h4 {
  font-family: var(--f-display);
  font-size: 1.5rem;
  color: var(--amber);
  margin-bottom: 0.5rem;
}
.form-success p { font-size: 0.88rem; color: var(--text-muted); }
.form-error-banner {
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.25);
  color: #ff6b6b;
  font-size: 0.88rem;
}

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-logo {
  font-family: var(--f-display);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.footer-logo strong { color: var(--amber); font-weight: 400; }
.footer-copy { font-size: 0.8rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.8rem; color: var(--text-muted); transition: color var(--trans); }
.footer-links a:hover { color: var(--amber); }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .details-grid  { grid-template-columns: repeat(2, 1fr); }
  .modes-grid    { grid-template-columns: repeat(3, 1fr); }
  .reviews-grid  { grid-template-columns: repeat(2, 1fr); }
  .video-grid   { grid-template-columns: 1fr; }
  .video-col    { flex-direction: row; }
  .video-card--sm { flex: 1; }
  .faq-inner    { grid-template-columns: 1fr; gap: 3rem; }
  .faq-inner .sec-header { position: static; }
  .order-layout { grid-template-columns: 1fr; gap: 3rem; }
  .order-info   { position: static; }
}
@media (max-width: 768px) {
  .topbar-nav   { display: none; }
  .topbar-menu-toggle { display: flex; }
  .sidenav      { display: none; }
  .hero-content { padding: 0 1.5rem; padding-top: calc(var(--topbar-h) + 6vh); }
  .hero-btns    { flex-direction: column; align-items: flex-start; }
  .s-hero { min-height: 100dvh; }
  .container    { padding: 0 1.25rem; }
  .details-grid  { grid-template-columns: 1fr; }
  .modes-grid    { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid  { grid-template-columns: 1fr; }
  .how-row      { grid-template-columns: 1fr; }
  .how-row--reverse .how-img { order: 0; }
  .how-row--reverse .how-text { order: 1; }
  .how-text     { padding: 2rem 1.5rem; }
  .video-col    { flex-direction: column; }
  .faq-inner    { grid-template-columns: 1fr; }
  .order-layout { grid-template-columns: 1fr; }
  .form-row     { grid-template-columns: 1fr; }
  #order-form   { padding: 1.5rem; }
  .form-header  { padding: 1.5rem; }
  .car-caption  { flex-direction: column; align-items: flex-start; }
  .scroll-indicator { left: 1.5rem; }
}
@media (max-width: 480px) {
  .modes-grid { grid-template-columns: 1fr 1fr; }
  .hero-headline { font-size: 4rem; }
}