/* ================================================================
   AMBHUTI — Premium Design System
   Brand: Construction Chemicals | Industrial Luxury
   ================================================================ */

/* --- Design Tokens --- */
:root {
  --c-primary:        #8B1C18;
  --c-primary-dark:   #6B1411;
  --c-primary-mid:    #A82420;
  --c-primary-light:  #C0392B;
  --c-accent:         #C8932A;
  --c-accent-light:   #E0A830;

  --c-dark:           #0D0D0D;
  --c-dark-2:         #161616;
  --c-dark-3:         #1F1F1F;
  --c-dark-4:         #2D2D2D;
  --c-dark-5:         #3A3A3A;
  --c-mid:            #767676;
  --c-mid-light:      #9A9A9A;
  --c-border:         #EAEAE6;
  --c-light:          #F7F5F3;
  --c-light-2:        #FAFAF8;
  --c-white:          #FFFFFF;

  --f-display:        'Barlow Condensed', sans-serif;
  --f-sans:           'Inter', sans-serif;

  --fs-xs:  0.75rem;
  --fs-sm:  0.875rem;
  --fs-base:1rem;
  --fs-md:  1.125rem;
  --fs-lg:  1.25rem;
  --fs-xl:  1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.75rem;
  --fs-4xl: 3.75rem;

  --sp-section:    clamp(72px, 10vw, 120px);
  --sp-container:  clamp(20px, 5vw, 60px);
  --container-max: 1280px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-sm:      0 1px 4px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md:      0 4px 20px rgba(0,0,0,.09), 0 8px 40px rgba(0,0,0,.06);
  --shadow-lg:      0 12px 48px rgba(0,0,0,.12), 0 32px 80px rgba(0,0,0,.08);
  --shadow-primary: 0 8px 32px rgba(139,28,24,.28), 0 2px 8px rgba(139,28,24,.16);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t:    0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 0.18s ease;
  --t-slow: 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================================================
   RESET + BASE
   ================================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--c-dark-3);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ================================================================
   LAYOUT UTILITIES
   ================================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-container);
}
.text-center { text-align: center; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ================================================================
   SECTION HEADER
   ================================================================ */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header.left { text-align: left; }
.section-header.left .section-label { padding: 0; }
.section-header.left .section-label::before { display: none; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 14px;
}
.section-label::before,
.section-label::after {
  content: '';
  display: block;
  width: 28px;
  height: 1.5px;
  background: currentColor;
  flex-shrink: 0;
}
.section-label.no-line::before,
.section-label.no-line::after { display: none; }

.section-header h2 {
  font-family: var(--f-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.05;
  color: var(--c-dark-2);
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
.section-header p {
  font-size: var(--fs-md);
  color: var(--c-mid);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.75;
}
.section-header.left p { margin: 0; }

/* Light variant */
.section-header.light h2 { color: var(--c-white); }
.section-header.light p  { color: rgba(255,255,255,.55); }
.section-header.light .section-label { color: var(--c-accent-light); }

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 34px;
  font-family: var(--f-sans);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: var(--t);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; stroke: currentColor; flex-shrink: 0; }

.btn-primary {
  background: var(--c-primary);
  color: var(--c-white);
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(139,28,24,.4);
}

.btn-accent {
  background: var(--c-accent);
  color: var(--c-white);
}
.btn-accent:hover {
  background: var(--c-accent-light);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--c-white);
  border: 1.5px solid rgba(255,255,255,.45);
}
.btn-outline:hover {
  border-color: var(--c-white);
  background: rgba(255,255,255,.08);
}

.btn-outline-dark {
  background: transparent;
  color: var(--c-dark-2);
  border: 1.5px solid rgba(0,0,0,.18);
}
.btn-outline-dark:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.btn-white {
  background: var(--c-white);
  color: var(--c-primary);
}
.btn-white:hover {
  background: var(--c-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,255,255,.15);
}

.btn-outline-white {
  background: transparent;
  color: var(--c-white);
  border: 1.5px solid rgba(255,255,255,.45);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.1);
  border-color: var(--c-white);
}

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 22px 0;
  transition: padding .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
}
.navbar.scrolled {
  padding: 13px 0;
  background: rgba(13,13,13,.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,.05), 0 8px 40px rgba(0,0,0,.35);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-container);
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.nav-logo img {
  height: 50px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: opacity var(--t);
}
.nav-logo:hover img { opacity: .85; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-menu li { position: relative; }
.nav-menu > li > a {
  display: block;
  padding: 8px 14px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: rgba(255,255,255,.75);
  letter-spacing: 0.03em;
  transition: color var(--t-fast), background var(--t-fast);
  border-radius: var(--radius-sm);
}
.nav-menu > li > a:hover,
.nav-menu > li.active > a {
  color: var(--c-white);
  background: rgba(255,255,255,.07);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid rgba(255,255,255,.5);
  margin-left: 6px;
  vertical-align: middle;
  transition: transform var(--t-fast);
}
.nav-dropdown:hover > a::after { transform: rotate(180deg); }

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 210px;
  background: var(--c-dark-3);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-md);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t), transform var(--t);
  box-shadow: var(--shadow-lg);
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: 9px 14px;
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.6);
  border-radius: var(--radius-sm);
  transition: color var(--t-fast), background var(--t-fast), padding var(--t-fast);
}
.nav-dropdown-menu a:hover {
  color: var(--c-white);
  background: rgba(255,255,255,.06);
  padding-left: 18px;
}

.nav-cta {
  margin-left: 12px;
  padding: 10px 22px;
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
  transition: var(--t);
  flex-shrink: 0;
}
.nav-cta:hover {
  background: var(--c-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  margin-left: auto;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: var(--t);
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--c-dark);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 60px var(--sp-container);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-slow);
}
.nav-mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.nav-mobile-overlay a {
  font-family: var(--f-display);
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  color: rgba(255,255,255,.7);
  letter-spacing: -0.02em;
  line-height: 1.25;
  transition: color var(--t-fast);
  display: block;
  padding: 6px 0;
}
.nav-mobile-overlay a:hover { color: var(--c-white); }
.nav-mobile-overlay .mobile-cta {
  margin-top: 32px;
  font-family: var(--f-sans);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--c-accent) !important;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-mobile-close {
  position: absolute;
  top: 24px; right: var(--sp-container);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.5);
  font-size: 28px;
  transition: color var(--t-fast);
}
.nav-mobile-close:hover { color: var(--c-white); }
.mobile-contact-info {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.08);
  width: 100%;
}
.mobile-contact-info p {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.35);
  margin-bottom: 4px;
}
.mobile-contact-info a {
  font-family: var(--f-sans) !important;
  font-size: var(--fs-md) !important;
  font-weight: 500 !important;
  color: rgba(255,255,255,.6) !important;
  letter-spacing: 0 !important;
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 100px; /* offset for fixed navbar (~94px) */
}

.hero-slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.4s ease;
}
.hero-slide.active {
  opacity: 1;
  animation: kenBurns 9s ease-in-out forwards;
}
@keyframes kenBurns {
  from { transform: scale(1.06) translateX(0); }
  to   { transform: scale(1.0) translateX(-0.5%); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(105deg,
      rgba(10,8,8,.92) 0%,
      rgba(100,18,15,.65) 50%,
      rgba(10,8,8,.82) 100%);
}
/* Bottom fade for brand strip merge */
.hero-overlay::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 180px;
  background: linear-gradient(to top, rgba(10,8,8,.7), transparent);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-container);
  width: 100%;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
  opacity: 0;
  animation: heroFadeUp .8s .2s var(--ease) forwards;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 44px;
  height: 1.5px;
  background: currentColor;
}

.hero-title {
  font-family: var(--f-display);
  font-size: clamp(3.8rem, 10vw, 8.5rem);
  font-weight: 900;
  line-height: 0.93;
  color: var(--c-white);
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  max-width: 850px;
  opacity: 0;
  animation: heroFadeUp .9s .4s var(--ease) forwards;
}
.hero-title .accent { color: var(--c-accent); }

.hero-tagline {
  font-family: var(--f-display);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,.4);
  margin-bottom: 24px;
  opacity: 0;
  animation: heroFadeUp .9s .55s var(--ease) forwards;
}

.hero-desc {
  font-size: var(--fs-md);
  color: rgba(255,255,255,.68);
  max-width: 500px;
  line-height: 1.78;
  margin-bottom: 44px;
  opacity: 0;
  animation: heroFadeUp .9s .65s var(--ease) forwards;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: heroFadeUp .9s .8s var(--ease) forwards;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,.1);
  opacity: 0;
  animation: heroFadeUp .9s 1s var(--ease) forwards;
}
.hero-stat-item {}
.hero-stat-num {
  font-family: var(--f-display);
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--c-white);
  line-height: 1;
  letter-spacing: -0.03em;
}
.hero-stat-num span { color: var(--c-accent); }
.hero-stat-label {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  opacity: 0;
  animation: heroFadeUp .9s 1.1s var(--ease) forwards;
}
.hero-scroll span {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
}
.hero-scroll-line {
  width: 1px;
  height: 52px;
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,.15);
}
.hero-scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--c-accent);
  animation: scrollTrail 2s ease-in-out infinite;
}
@keyframes scrollTrail {
  0%   { top: -100%; }
  100% { top: 200%; }
}

/* Slide dots */
.hero-dots {
  position: absolute;
  right: var(--sp-container);
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  animation: heroFadeUp .9s 1.2s var(--ease) forwards;
}
.hero-dot {
  width: 2px;
  height: 28px;
  background: rgba(255,255,255,.2);
  border-radius: 2px;
  cursor: pointer;
  transition: var(--t);
  position: relative;
}
.hero-dot::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 0;
  background: var(--c-accent);
  border-radius: 2px;
  transition: height .4s ease;
}
.hero-dot.active {
  height: 44px;
}
.hero-dot.active::after { height: 100%; }

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ================================================================
   BRAND STRIP
   ================================================================ */
.brand-strip {
  background: var(--c-primary);
  padding: 0;
  position: relative;
  z-index: 3;
}
.brand-strip-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-container);
  display: flex;
  align-items: stretch;
}
.strip-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 36px;
  border-right: 1px solid rgba(255,255,255,.12);
  flex: 1;
  transition: background var(--t-fast);
}
.strip-item:last-child { border-right: none; }
.strip-item:hover { background: rgba(255,255,255,.05); }
.strip-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  opacity: .6;
}
.strip-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--c-white);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.strip-text strong {
  display: block;
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1;
  letter-spacing: -0.01em;
}
.strip-text span {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.55);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ================================================================
   PRODUCTS SECTION
   ================================================================ */
.products-section {
  padding: var(--sp-section) 0;
  background: var(--c-white);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 52px;
}

/* Product Card */
.product-card {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
/* Top accent bar */
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
  z-index: 1;
}
.product-card:hover::before { transform: scaleX(1); }

.product-card__number {
  position: absolute;
  top: 16px;
  left: 20px;
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,.9);
  background: rgba(0,0,0,.35);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: 100px;
  z-index: 2;
}

.product-card__media {
  position: relative;
  height: 230px;
  overflow: hidden;
  background: var(--c-light);
}
.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform .65s cubic-bezier(0.4,0,0.2,1);
}
.product-card:hover .product-card__media img {
  transform: scale(1.07);
}
/* Gradient overlay on image */
.product-card__media::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  background: linear-gradient(to top, rgba(0,0,0,.25), transparent);
  pointer-events: none;
}

.product-card__body {
  padding: 28px 28px 32px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card__icon {
  width: 46px;
  height: 46px;
  background: var(--c-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: background var(--t), box-shadow var(--t);
  flex-shrink: 0;
}
.product-card:hover .product-card__icon {
  background: var(--c-primary);
  box-shadow: 0 6px 20px rgba(139,28,24,.3);
}
.product-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--c-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--t);
}
.product-card:hover .product-card__icon svg { stroke: var(--c-white); }

.product-card__title {
  font-family: var(--f-display);
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  font-weight: 700;
  color: var(--c-dark-2);
  margin-bottom: 10px;
  letter-spacing: -0.015em;
  line-height: 1.1;
}
.product-card__desc {
  font-size: var(--fs-sm);
  color: var(--c-mid);
  line-height: 1.7;
  margin-bottom: 24px;
  flex: 1;
}
.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: gap var(--t-fast), color var(--t-fast);
  align-self: flex-start;
}
.product-card__link svg {
  width: 15px; height: 15px;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform var(--t-fast);
}
.product-card:hover .product-card__link { gap: 12px; }
.product-card:hover .product-card__link svg { transform: translateX(3px); }

.products-cta { text-align: center; }

/* ================================================================
   WHY AMBHUTI
   ================================================================ */
.why-section {
  padding: var(--sp-section) 0;
  background: var(--c-dark-2);
  position: relative;
  overflow: hidden;
}
.why-section::before {
  content: 'QUALITY';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--f-display);
  font-size: 22vw;
  font-weight: 900;
  color: rgba(255,255,255,.02);
  white-space: nowrap;
  pointer-events: none;
  letter-spacing: -0.05em;
  user-select: none;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  margin-top: 60px;
}
.advantage-item {
  padding: 48px 32px;
  background: rgba(255,255,255,.025);
  position: relative;
  transition: background var(--t);
  overflow: hidden;
}
.advantage-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.advantage-item:hover { background: rgba(255,255,255,.04); }
.advantage-item:hover::after { transform: scaleX(1); }

.advantage-item__num {
  font-family: var(--f-display);
  font-size: 5rem;
  font-weight: 900;
  color: rgba(255,255,255,.04);
  line-height: 1;
  position: absolute;
  top: 16px;
  right: 20px;
  letter-spacing: -0.05em;
  pointer-events: none;
}

.advantage-icon {
  width: 54px;
  height: 54px;
  background: rgba(139,28,24,.12);
  border: 1px solid rgba(139,28,24,.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}
.advantage-item:hover .advantage-icon {
  background: var(--c-primary);
  border-color: var(--c-primary);
  box-shadow: 0 8px 24px rgba(139,28,24,.35);
}
.advantage-icon svg {
  width: 24px; height: 24px;
  stroke: var(--c-primary);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--t);
}
.advantage-item:hover .advantage-icon svg { stroke: var(--c-white); }

.advantage-item h3 {
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.advantage-item p {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.42);
  line-height: 1.75;
}

/* ================================================================
   ABOUT TEASER (Company Story)
   ================================================================ */
.about-section {
  padding: var(--sp-section) 0;
  background: var(--c-white);
  overflow: hidden;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-media {
  position: relative;
}
.about-media__main {
  width: 100%;
  height: 520px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.about-media__accent {
  position: absolute;
  bottom: -32px;
  right: -32px;
  width: 52%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 6px solid var(--c-white);
  box-shadow: var(--shadow-lg);
}
.about-badge {
  position: absolute;
  top: 32px;
  right: -24px;
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  text-align: center;
  box-shadow: var(--shadow-primary);
}
.about-badge__num {
  font-family: var(--f-display);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
}
.about-badge__label {
  font-size: var(--fs-xs);
  opacity: .75;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 4px;
}
.about-content {}
.about-content p {
  font-size: var(--fs-md);
  color: var(--c-mid);
  line-height: 1.8;
  margin-bottom: 20px;
}
.about-check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 28px 0 36px;
}
.about-check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--fs-sm);
  color: var(--c-dark-4);
  line-height: 1.5;
}
.about-check-item svg {
  width: 18px; height: 18px;
  stroke: var(--c-accent);
  fill: none;
  stroke-width: 2;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ================================================================
   APPLICATIONS
   ================================================================ */
.applications-section {
  padding: var(--sp-section) 0;
  background: var(--c-light-2);
}
.applications-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 260px 260px;
  gap: 16px;
}
.app-tile {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}
.app-tile:first-child { grid-row: 1 / 3; }

.app-tile__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform .7s cubic-bezier(0.4,0,0.2,1);
}
.app-tile:hover .app-tile__bg { transform: scale(1.07); }

.app-tile__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,.9) 0%, rgba(13,13,13,.15) 55%);
  transition: background .4s ease;
}
.app-tile:hover .app-tile__overlay {
  background: linear-gradient(to top, rgba(100,15,12,.9) 0%, rgba(100,15,12,.25) 55%);
}

.app-tile__content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 28px;
}
.app-tile__tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 8px;
}
.app-tile__title {
  font-family: var(--f-display);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.app-tile:first-child .app-tile__title {
  font-size: clamp(2rem, 3.5vw, 3rem);
}
.app-tile__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1.5px solid rgba(255,255,255,.3);
  border-radius: 50%;
  margin-top: 16px;
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.app-tile__arrow svg {
  width: 14px; height: 14px;
  stroke: var(--c-white);
  stroke-width: 2;
}
.app-tile:hover .app-tile__arrow {
  background: var(--c-accent);
  border-color: var(--c-accent);
  transform: translateX(4px);
}

/* ================================================================
   STATS
   ================================================================ */
.stats-section {
  padding: clamp(60px,8vw,100px) 0;
  background: var(--c-dark);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--c-primary) 25%,
    var(--c-accent) 50%,
    var(--c-primary) 75%,
    transparent 100%);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,.05);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-item {
  padding: 52px 24px;
  text-align: center;
  background: var(--c-dark);
  position: relative;
  transition: background var(--t);
}
.stat-item:hover { background: var(--c-dark-3); }

.stat-number-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin-bottom: 10px;
}
.stat-number {
  font-family: var(--f-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 900;
  color: var(--c-white);
  line-height: 1;
  letter-spacing: -0.04em;
}
.stat-suffix {
  font-family: var(--f-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1;
}
.stat-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: rgba(255,255,255,.4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.stat-divider {
  width: 24px;
  height: 1.5px;
  background: var(--c-primary);
  margin: 10px auto;
  transition: width var(--t);
}
.stat-item:hover .stat-divider { width: 44px; }

/* ================================================================
   CTA BANNER
   ================================================================ */
.cta-section {
  position: relative;
  padding: clamp(80px,10vw,130px) 0;
  background: var(--c-primary);
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 100% at 15% 50%, rgba(200,147,42,.15), transparent 60%),
    radial-gradient(ellipse 50% 80% at 85% 50%, rgba(0,0,0,.25), transparent 60%);
}
/* Texture */
.cta-section::after {
  content: 'AMBHUTI';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--f-display);
  font-size: 18vw;
  font-weight: 900;
  color: rgba(255,255,255,.04);
  white-space: nowrap;
  pointer-events: none;
  letter-spacing: -0.05em;
}

.cta-section .container { position: relative; z-index: 1; }
.cta-eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin-bottom: 20px;
}
.cta-title {
  font-family: var(--f-display);
  font-size: clamp(2.8rem, 7vw, 6rem);
  font-weight: 900;
  line-height: 0.95;
  color: var(--c-white);
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
.cta-subtitle {
  font-size: var(--fs-md);
  color: rgba(255,255,255,.6);
  margin-bottom: 48px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-contact-row {
  margin-top: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: rgba(255,255,255,.35);
  font-size: var(--fs-sm);
}
.cta-contact-row::before,
.cta-contact-row::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: rgba(255,255,255,.15);
}
.cta-contact-row a {
  color: rgba(255,255,255,.65);
  font-weight: 500;
  transition: color var(--t-fast);
}
.cta-contact-row a:hover { color: var(--c-accent-light); }

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: var(--c-dark);
  padding: 80px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 60px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.footer-brand {}
.footer-brand-logo {
  height: 46px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: 22px;
}
.footer-brand-desc {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.38);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 270px;
}
.footer-iso {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.45);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}
.footer-iso svg {
  width: 14px; height: 14px;
  stroke: var(--c-accent);
  fill: none;
  stroke-width: 2;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.07);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.4);
  font-size: 15px;
  transition: all var(--t-fast);
  font-style: normal;
}
.footer-social a:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: var(--c-white);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-white);
  margin-bottom: 24px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.38);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--t-fast), padding-left var(--t-fast);
}
.footer-links a::before {
  content: '';
  display: block;
  width: 0;
  height: 1px;
  background: var(--c-primary);
  transition: width var(--t-fast);
  flex-shrink: 0;
}
.footer-links a:hover {
  color: rgba(255,255,255,.75);
  padding-left: 6px;
}
.footer-links a:hover::before { width: 12px; }

.footer-contact {}
.footer-contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  align-items: flex-start;
}
.footer-contact-item svg {
  width: 15px; height: 15px;
  stroke: var(--c-primary-light);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  flex-shrink: 0;
  margin-top: 3px;
}
.footer-contact-item p {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.38);
  line-height: 1.6;
}
.footer-contact-item a {
  color: rgba(255,255,255,.6);
  transition: color var(--t-fast);
}
.footer-contact-item a:hover { color: var(--c-accent); }

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-bottom p {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.2);
}
.footer-bottom-links {
  display: flex;
  gap: 28px;
}
.footer-bottom-links a {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.2);
  transition: color var(--t-fast);
}
.footer-bottom-links a:hover { color: rgba(255,255,255,.5); }

/* ================================================================
   SCROLL ANIMATIONS
   ================================================================ */
[data-animate] {
  opacity: 0;
  transition:
    opacity .75s var(--ease),
    transform .75s var(--ease);
}
[data-animate="fade-up"]    { transform: translateY(30px); }
[data-animate="fade-left"]  { transform: translateX(-30px); }
[data-animate="fade-right"] { transform: translateX(30px); }
[data-animate="fade-scale"] { transform: scale(0.94); }
[data-animate="fade"]       { transform: none; }

[data-animate].in-view {
  opacity: 1;
  transform: none;
}
[data-delay="1"] { transition-delay: .1s; }
[data-delay="2"] { transition-delay: .18s; }
[data-delay="3"] { transition-delay: .26s; }
[data-delay="4"] { transition-delay: .34s; }
[data-delay="5"] { transition-delay: .42s; }
[data-delay="6"] { transition-delay: .50s; }
[data-delay="7"] { transition-delay: .58s; }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1140px) {
  .about-grid   { gap: 48px; }
  .footer-grid  { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 1024px) {
  .advantages-grid  { grid-template-columns: repeat(2, 1fr); }
  .products-grid    { grid-template-columns: repeat(2, 1fr); }
  .stats-grid       { grid-template-columns: repeat(2, 1fr); }
  .applications-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 240px 240px 240px;
  }
  .app-tile:first-child { grid-row: auto; grid-column: 1 / 3; }
  .about-grid   { grid-template-columns: 1fr; }
  .about-media  { display: none; }
  .brand-strip-inner { flex-wrap: wrap; }
  .strip-item   { flex: 1 1 calc(50% - 1px); }
  .strip-item:nth-child(2) { border-right: none; }
}

@media (max-width: 768px) {
  :root { --sp-container: 24px; }
  .nav-menu, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .products-grid    { grid-template-columns: 1fr; }
  .advantages-grid  { grid-template-columns: 1fr; }
  .stats-grid       { grid-template-columns: repeat(2, 1fr); }
  .applications-grid {
    grid-template-columns: 1fr;
    grid-template-rows: 260px 200px 200px 200px;
  }
  .app-tile:first-child { grid-row: auto; grid-column: auto; }
  .footer-grid  { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  .footer-bottom-links { justify-content: center; }
  .strip-item { flex: 1 1 100%; border-right: none; border-bottom: 1px solid rgba(255,255,255,.1); }
  .strip-item:last-child { border-bottom: none; }
  .hero-dots    { display: none; }
  .hero-stats   { gap: 24px; flex-wrap: wrap; }
}

@media (max-width: 540px) {
  .hero-actions, .cta-actions { flex-direction: column; align-items: flex-start; }
  .cta-actions { align-items: center; }
  .stats-grid   { grid-template-columns: 1fr; }
  .hero-stats   { display: none; }
}