/* ===========================================
   X-TRAC — Design System
   Spacing scale: 8 / 16 / 24 / 32 / 48 / 64 / 80 / 120
   Colors: 3 + neutrals
   Type: Space Grotesk (display) + Inter (body)
   =========================================== */

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

:root {
  /* Brand — only three real colors */
  --gold: #D4960C;
  --black: #0F0F0F;
  --white: #FFFFFF;

  /* Neutrals */
  --gray-950: #141414;
  --gray-900: #1A1A1A;
  --gray-800: #272727;
  --gray-600: #6B6B6B;
  --gray-400: #9E9E9E;
  --gray-200: #E0E0E0;
  --gray-100: #F3F3F3;
  --gray-50: #F9F9F9;

  /* Type */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', var(--font-body);

  /* Spacing scale */
  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 32px;
  --s5: 48px;
  --s6: 64px;
  --s7: 80px;
  --s8: 120px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--gray-600);
  background: var(--white);
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--s3);
}


/* ===========================================
   Typography
   =========================================== */

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--black);
  line-height: 1.12;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  margin-bottom: var(--s3);
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section--dark h2,
.section--dark h3 { color: var(--white); }
.section--dark p,
.section--dark { color: var(--gray-400); }


/* ===========================================
   Buttons
   =========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 40px;
  background: var(--gold);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
  letter-spacing: 0.005em;
}

.btn:hover {
  background: #B87E08;
  transform: translateY(-1px);
}

.btn--full { width: 100%; }


/* ===========================================
   Navigation
   =========================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: rgba(255,255,255,0.06);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--s3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.logo span { color: var(--gold); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s4);
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--white); }

.nav-cta {
  background: var(--gold) !important;
  color: var(--white) !important;
  padding: 10px 24px !important;
  border-radius: 4px !important;
  font-weight: 600 !important;
  transition: background 0.25s !important;
}

.nav-cta:hover { background: #B87E08 !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--s1);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s;
}


/* ===========================================
   Hero
   =========================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 65% 50%, rgba(212, 150, 12, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 20% 80%, rgba(255, 255, 255, 0.015) 0%, transparent 50%),
    linear-gradient(180deg, #111111 0%, #0D0D0D 40%, #0A0A0A 100%);
}

/* Thin gold accent line at bottom edge of hero, above trust bar */
.hero::after {
  content: '';
  position: absolute;
  bottom: 68px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1120px, calc(100% - 48px));
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(212, 150, 12, 0.15) 20%, rgba(212, 150, 12, 0.15) 80%, transparent 100%);
  z-index: 4;
}

/* Subtle grid texture overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 70% 70% at 60% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 60% 50%, black 20%, transparent 70%);
}

/* Warm ambient glow behind product image */
.hero-glow {
  position: absolute;
  top: 45%;
  right: 8%;
  width: 700px;
  height: 700px;
  transform: translateY(-50%);
  background: radial-gradient(circle, rgba(212, 150, 12, 0.08) 0%, rgba(212, 150, 12, 0.03) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--s3);
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--s6);
  align-items: center;
}

.hero-content {
  padding: var(--s7) 0;
}

.hero-eyebrow {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--s2);
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--s4);
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.75;
  max-width: 460px;
  margin-bottom: var(--s5);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--s4);
}

.hero-scroll {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.02em;
  transition: color 0.3s var(--ease);
}

.hero-scroll:hover {
  color: var(--white);
}

.hero-scroll-arrow {
  display: inline-block;
  margin-left: 4px;
  animation: hero-bounce 2.5s var(--ease) infinite;
}

@keyframes hero-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* Product image — large, floating, slightly overflowing */
.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s5) 0;
}

.hero-image img {
  max-width: 110%;
  max-height: 65vh;
  filter:
    drop-shadow(0 24px 80px rgba(0, 0, 0, 0.6))
    drop-shadow(0 0 40px rgba(212, 150, 12, 0.06));
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image img:hover {
  transform: scale(1.04);
  filter:
    drop-shadow(0 28px 60px rgba(0, 0, 0, 0.7))
    drop-shadow(0 0 30px rgba(212, 150, 12, 0.08));
}

/* -- Staggered entrance animation -- */
.hero-anim {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-anim[data-delay="0"] { transition-delay: 0.1s; }
.hero-anim[data-delay="1"] { transition-delay: 0.22s; }
.hero-anim[data-delay="2"] { transition-delay: 0.36s; }
.hero-anim[data-delay="3"] { transition-delay: 0.5s; }
.hero-anim[data-delay="4"] { transition-delay: 0.7s; }

.hero-anim.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Product image gets a scale entrance instead */
.hero-image.hero-anim {
  transform: translateY(0) scale(0.96);
}
.hero-image.hero-anim.is-visible {
  transform: translateY(0) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .hero-anim {
    opacity: 1;
    transform: none;
    transition: none;
  }
}


/* ===========================================
   Trust Bar
   =========================================== */

.trust-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.6) 0%, rgba(10, 10, 10, 0.8) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.trust-bar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--s4) var(--s3);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--s6);
}

.trust-divider {
  width: 1px;
  height: 28px;
  background: rgba(255, 255, 255, 0.08);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.trust-item strong {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--white);
  font-size: 1.6rem;
  letter-spacing: -0.02em;
  line-height: 1;
}

.trust-item span {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
}


/* ===========================================
   Sections — Common
   =========================================== */

.section {
  padding: var(--s8) 0;
}

.section--dark {
  background: var(--gray-950);
}

.section--muted {
  background: var(--gray-50);
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--s2);
}

.section-intro {
  max-width: 600px;
  margin-bottom: var(--s7);
  line-height: 1.7;
}

.section--dark .section-intro { color: var(--gray-400); }


/* ===========================================
   Applications
   =========================================== */

.applications {
  background: var(--gray-950);
  padding: var(--s8) 0 var(--s6);
}

.applications h2 {
  color: var(--white);
  margin-bottom: var(--s2);
}

.app-intro {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.7;
  max-width: 100%;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s3);
  margin-top: var(--s6);
  margin-bottom: var(--s4);
}

.app-card {
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), background 0.35s var(--ease);
}

.app-card:hover {
  border-color: rgba(212, 150, 12, 0.4);
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.03);
}

.app-card-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--gray-900);
}

.app-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: transform 0.6s var(--ease), opacity 0.6s var(--ease);
}

.app-card:hover .app-card-img img {
  transform: scale(1.04);
  opacity: 1;
}

.app-card-body {
  padding: var(--s3);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-card h3 {
  color: var(--white);
  margin-bottom: var(--s1);
}

.app-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.4);
  flex: 1;
}

.app-card-link {
  display: inline-block;
  margin-top: var(--s2);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.app-card:hover .app-card-link {
  opacity: 1;
  transform: translateX(0);
}

.app-note {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.3);
}


/* ===========================================
   Product Section
   =========================================== */

.product {
  background: var(--gray-950);
}


/* -- Product Intro -- */

.product-intro {
  padding: var(--s8) 0 var(--s7);
}

.product-intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s7);
  align-items: center;
}

.product-intro-text .section-label { margin-bottom: var(--s2); }

.product-intro-text h2 {
  color: var(--white);
  margin-bottom: var(--s3);
}

.product-intro-text p {
  color: var(--gray-400);
  line-height: 1.75;
  max-width: 480px;
}

/* -- Product Features 4-column -- */

.product-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s5);
  margin-top: var(--s7);
}

.product-feature {
  padding-top: var(--s4);
  border-top: 2px solid rgba(255,255,255,0.08);
  transition: border-color 0.3s var(--ease);
}

.product-feature:hover {
  border-top-color: var(--gold);
}

.product-feature-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: var(--s3);
}

.product-feature h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--s2);
}

.product-feature p {
  font-size: 0.88rem;
  color: var(--gray-400);
  line-height: 1.7;
}


/* -- Product Showcase (inline with stats) -- */

.product-showcase-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s4);
}

.product-showcase-inner img {
  max-width: 100%;
  filter: drop-shadow(0 12px 40px rgba(0,0,0,0.5));
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-showcase-inner img:hover {
  transform: scale(1.04);
  filter: drop-shadow(0 16px 50px rgba(0,0,0,0.6)) drop-shadow(0 0 30px rgba(212, 150, 12, 0.08));
}


/* -- Construction Rows -- */

.construction {
  padding: var(--s6) 0 var(--s8);
}

.construct-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--s6);
  align-items: center;
  margin-bottom: var(--s7);
}

.construct-row:last-child { margin-bottom: 0; }

.construct-row--flip .construct-img { order: 2; }
.construct-row--flip .construct-text { order: 1; }

.construct-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 8px;
  max-width: 420px;
}

.construct-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.construct-row:hover .construct-img img {
  transform: scale(1.03);
}

.construct-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: var(--s3);
}

.construct-text h3 {
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: var(--s2);
}

.construct-text p {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.75;
  max-width: 440px;
}




/* ===========================================
   Tread Patterns (inside Product section)
   =========================================== */

.treads-section {
  padding: var(--s7) 0 var(--s8);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.treads-section .section-label { margin-bottom: var(--s2); }

.treads-section h2 {
  color: var(--white);
  margin-bottom: var(--s3);
}

.treads {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s4);
  margin-top: var(--s6);
  margin-bottom: var(--s4);
}

.tread {
  display: flex;
  flex-direction: column;
  gap: var(--s3);
  padding: var(--s4);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.tread:hover {
  border-color: var(--gold);
  background: rgba(212, 150, 12, 0.04);
}

.tread-header {
  display: flex;
  align-items: center;
  gap: var(--s3);
}

.tread-img {
  width: 72px;
  height: 72px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--gray-900);
  flex-shrink: 0;
  border: 2px solid var(--gold);
}

.tread-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tread-title h3 {
  color: var(--white);
  margin-bottom: 2px;
}

.tread-sub {
  display: block;
  font-size: 0.82rem;
  color: var(--gold);
  font-weight: 500;
  white-space: nowrap;
}

.tread-body p {
  font-size: 0.92rem;
  color: var(--gray-400);
  line-height: 1.65;
  margin-bottom: var(--s2);
  max-width: 540px;
}

.tread-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1);
}

.tread-tags span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-400);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 5px 14px;
  border-radius: 3px;
}

.treads-note {
  font-size: 0.88rem;
  color: var(--gray-400);
}


/* ===========================================
   OEM Grid (within Applications)
   =========================================== */

.oem-block {
  margin-top: var(--s7);
  padding-top: var(--s7);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.oem-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.025em;
  margin-bottom: var(--s3);
}

.oem-sub {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.7;
  margin-top: var(--s5);
}

.oem-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
  margin-top: var(--s5);
}

.oem-grid span {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px 8px;
  border-radius: 6px;
  letter-spacing: 0.02em;
  text-align: center;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.oem-grid span:hover {
  border-color: rgba(212, 150, 12, 0.5);
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}


/* ===========================================
   Manufacturing
   =========================================== */

.manufacturing {
  background: var(--gray-950);
}

.manufacturing-intro {
  padding: var(--s8) 0 0;
}

.manufacturing-intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s7);
  align-items: center;
}

.manufacturing-intro-img {
  display: flex;
  align-items: center;
  justify-content: center;
}

.manufacturing-intro-img img {
  max-width: 100%;
  filter: drop-shadow(0 12px 40px rgba(0,0,0,0.5));
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.manufacturing-intro-img img:hover {
  transform: scale(1.04);
  filter: drop-shadow(0 16px 50px rgba(0,0,0,0.6)) drop-shadow(0 0 30px rgba(212, 150, 12, 0.08));
}

.manufacturing-intro h2,
.manufacturing-intro-text h2 {
  color: var(--white);
  margin-bottom: var(--s3);
}

.manufacturing-sub {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 640px;
}

.manufacturing-sub + .manufacturing-sub {
  margin-top: var(--s3);
}


/* ===========================================
   About
   =========================================== */

.about {
  position: relative;
  padding: var(--s8) 0;
  overflow: hidden;
}

.about-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.about-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.about-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(15, 15, 15, 0.92) 0%,
    rgba(15, 15, 15, 0.85) 50%,
    rgba(15, 15, 15, 0.75) 100%
  );
}

.about .container {
  position: relative;
  z-index: 2;
}

.about-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: var(--s8);
  align-items: start;
}

.about h2 {
  color: var(--white);
}

.about-text p {
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.8;
  margin-bottom: var(--s3);
  max-width: 560px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: var(--s1);
}

.about-stat {
  padding: var(--s4) 0;
  padding-left: var(--s4);
  border-left: 2px solid rgba(255, 255, 255, 0.12);
  transition: border-color 0.3s var(--ease);
}

.about-stat:first-child {
  padding-top: 0;
}

.about-stat:last-child {
  padding-bottom: 0;
}

.about-stat:hover {
  border-left-color: var(--gold);
}

.about-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 6px;
}

.about-stat-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}


/* ===========================================
   Contact
   =========================================== */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s7);
  align-items: start;
}

.contact-text p {
  max-width: 440px;
  line-height: 1.7;
  margin-bottom: var(--s4);
}

.contact-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-points li {
  font-size: 0.92rem;
  color: var(--gray-400);
  padding-left: var(--s3);
  position: relative;
}

.contact-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1.5px;
  background: var(--gold);
}


/* Form */

.contact-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: var(--s5);
}

.form-field {
  margin-bottom: var(--s2);
}

.form-field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--gray-400);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s2);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: border-color 0.2s;
  outline: none;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255,255,255,0.25);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--gold);
}

.contact-form select {
  appearance: none;
  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 1l4 4 4-4' stroke='%236B6B6B' stroke-width='1.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
}

.contact-form select option {
  background: var(--gray-950);
}

.contact-form textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form .btn {
  margin-top: var(--s1);
}


/* ===========================================
   Footer
   =========================================== */

.footer {
  background: var(--black);
  padding: var(--s5) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-email {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0.02em;
  transition: color 0.3s var(--ease);
}

.footer-email:hover {
  color: var(--gold);
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--gray-600);
}


/* ===========================================
   Scroll Reveal — subtle only
   =========================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}


/* ===========================================
   Responsive
   =========================================== */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--s4); text-align: center; }
  .hero-content { padding: 0; }
  .hero-content p { max-width: 100%; margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-image img { max-width: 80%; max-height: 40vh; margin: 0 auto; }
  .hero-glow { right: 50%; transform: translate(50%, -50%); width: 400px; height: 400px; }
  .product-intro-inner { grid-template-columns: 1fr; gap: var(--s5); }
  .product-showcase-inner { max-width: 400px; margin: 0 auto; }
  .manufacturing-intro-inner { grid-template-columns: 1fr; gap: var(--s5); }
  .manufacturing-intro-img { max-width: 400px; margin: 0 auto; }
  .construct-row { grid-template-columns: 1fr; gap: var(--s4); }
  .construct-row--flip .construct-img { order: 0; }
  .construct-row--flip .construct-text { order: 0; }
  .construct-text p { max-width: none; }
  .product-features { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: 1fr; }
  .about-layout { grid-template-columns: 1fr; gap: var(--s6); }
  .about-stats { flex-direction: row; gap: var(--s4); }
  .about-stat { border-left: none; border-top: 2px solid rgba(255,255,255,0.12); padding: var(--s3) 0 0; padding-left: 0; flex: 1; }
  .about-stat:first-child { padding-top: var(--s3); }
  .about-stat:hover { border-top-color: var(--gold); border-left-color: transparent; }
  .contact-layout { grid-template-columns: 1fr; gap: var(--s5); }
  .treads { grid-template-columns: 1fr; }
  .oem-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 680px) {
  .section { padding: var(--s7) 0; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: var(--gray-950);
    flex-direction: column;
    align-items: flex-start;
    padding: 96px var(--s4) var(--s5);
    gap: var(--s3);
    transition: right 0.35s var(--ease);
    border-left: 1px solid rgba(255,255,255,0.06);
  }

  .nav-links.is-open { right: 0; }

  .nav-links a {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
  }

  .nav-cta { width: 100%; text-align: center; }

  .hero { padding-top: 80px; min-height: auto; padding-bottom: 240px; }
  .hero-inner { padding-top: var(--s4); padding-bottom: var(--s4); }
  .hero h1 { font-size: 2.2rem; }
  .hero-actions { flex-direction: column; align-items: center; gap: var(--s3); }
  .hero-image img { max-height: 32vh; }

  .trust-bar-inner {
    flex-direction: column;
    gap: var(--s2);
    padding: var(--s3) var(--s2);
  }
  .trust-item strong { font-size: 1.1rem; }
  .trust-item span { font-size: 0.6rem; letter-spacing: 0.06em; }
  .trust-divider { display: none; }
  .oem-grid { grid-template-columns: repeat(3, 1fr); }

  .product-intro { padding: var(--s7) 0 var(--s5); }
  .product-features { grid-template-columns: 1fr; gap: var(--s4); }
  .construction { padding: var(--s5) 0 var(--s7); }
  .construct-row { margin-bottom: var(--s5); }

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

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

  .about-stats { flex-direction: column; }
  .about-stat { flex: none; border-top: none; border-left: 2px solid rgba(255,255,255,0.12); padding: var(--s3) 0 var(--s3) var(--s3); }
  .about-stat:first-child { padding-top: var(--s3); }
  .about-stat:hover { border-left-color: var(--gold); border-top-color: transparent; }
  .about-stat-value { font-size: 1.5rem; }
  .manufacturing-intro { padding: var(--s7) 0 0; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; gap: var(--s3); text-align: center; }
}