/* ==========================================================================
   KOTHARI CORROSION CONTROLLERS - ADVANCED INDUSTRIAL ARCHITECTURAL SYSTEM
   Acid Proof Tiles • Acid Proof Bricks • Acid & Alkali Resistant Mortar
   Manufacturer, Exporter & Turnkey Applicator Since 1969
   Visual Identity: Industrial Engineering + Advanced Materials + 3D Technology
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. DESIGN TOKENS & COLOR PALETTE
   -------------------------------------------------------------------------- */
:root {
  /* Core Industrial Palette */
  --color-graphite: #0B0D0E;
  --color-charcoal: #15191C;
  --color-steel: #242A2E;
  --color-surface-elevated: #1C2227;
  --color-surface-card: rgba(21, 25, 28, 0.85);

  /* Typography Colors */
  --color-offwhite: #F2EFE8;
  --color-warm-metal: #D4C7B5;
  --color-metal-light: #EBE5DC;
  --color-text-muted: #8E98A0;
  --color-text-dim: #5C6770;
  --pure-white: #FFFFFF;

  /* Industrial Accents */
  --accent-orange: #C96B32;
  --accent-orange-hover: #E07A3B;
  --accent-orange-glow: rgba(201, 107, 50, 0.35);
  --accent-orange-dim: rgba(201, 107, 50, 0.15);

  /* Brand Logo Navy & Royal Blue */
  --kothari-navy: #1C284E;
  --kothari-blue: #2563EB;
  --kothari-blue-light: #3B82F6;
  --kothari-blue-glow: rgba(37, 99, 235, 0.35);

  /* Micro Acid Accent */
  --accent-acid: #B6C85A;
  --accent-acid-glow: rgba(182, 200, 90, 0.3);

  /* Borders & Grid Overlays */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-bright: rgba(255, 255, 255, 0.35);
  --grid-line: rgba(255, 255, 255, 0.035);

  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Monaco, monospace;

  /* Header & Containers */
  --container-max: 1380px;
  --header-height: 84px;
  --header-compact-height: 70px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.75s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-elevated: 0 16px 48px rgba(0, 0, 0, 0.75);
  --shadow-3d: 0 25px 60px rgba(0, 0, 0, 0.85);
  --shadow-orange: 0 8px 30px var(--accent-orange-glow);
}

/* --------------------------------------------------------------------------
   02. BASE RESETS & GLOBAL STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-compact-height) + 16px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-graphite);
  color: var(--color-offwhite);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

body {
  background-color: var(--color-graphite);
  color: var(--color-offwhite);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Subtle Technical Blueprint Background Grid Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Top Scroll Progress Indicator */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--kothari-blue) 0%, var(--accent-orange) 100%);
  z-index: 1200;
  pointer-events: none;
  transition: width 0.1s linear;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   03. TYPOGRAPHY & INDUSTRIAL HEADINGS
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--pure-white);
}

.text-gradient {
  background: linear-gradient(135deg, var(--pure-white) 40%, var(--color-warm-metal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-orange { color: var(--accent-orange); }
.text-blue { color: var(--kothari-blue-light); }
.text-warm-metal { color: var(--color-warm-metal); }
.text-white { color: var(--pure-white); }
.text-muted { color: var(--color-text-muted); }
.text-mono { font-family: var(--font-mono); letter-spacing: -0.01em; }

/* 3D Strategic Typography */
.heading-3d {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  position: relative;
  text-shadow: 
    0 1px 0 rgba(255, 255, 255, 0.15),
    0 2px 2px rgba(0, 0, 0, 0.7),
    0 8px 24px rgba(0, 0, 0, 0.8);
}

.heading-3d-extruded {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  color: var(--pure-white);
  text-shadow:
    1px 1px 0 #181d21,
    2px 2px 0 #111518,
    3px 3px 0 #0b0d0e,
    4px 4px 14px rgba(0, 0, 0, 0.9);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-orange);
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 2px;
  background-color: var(--accent-orange);
}

.section-label.blue-label {
  color: var(--kothari-blue-light);
}
.section-label.blue-label::before {
  background-color: var(--kothari-blue-light);
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3.25rem);
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.025em;
}

.section-subtitle {
  font-size: clamp(1rem, 1.25vw, 1.1875rem);
  color: var(--color-warm-metal);
  max-width: 740px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   04. CONTAINER & LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section-spacing {
  padding-top: clamp(80px, 9vw, 130px);
  padding-bottom: clamp(80px, 9vw, 130px);
  position: relative;
}

.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border-medium) 20%, var(--border-medium) 80%, transparent 100%);
  position: relative;
  z-index: 2;
}

/* --------------------------------------------------------------------------
   05. BUTTON ARCHITECTURE (STRICTLY NO OVAL / NO PILL BUTTONS)
   -------------------------------------------------------------------------- */
.btn-industrial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 15px 30px;
  border-radius: 2px; /* Strictly Rectangular */
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  background-clip: padding-box;
}

/* Primary Industrial Accent Button (Orange) */
.btn-primary {
  background-color: var(--accent-orange);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 15px var(--accent-orange-dim), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-orange-hover);
  color: #FFFFFF;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--accent-orange-glow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* Brand Blue Button */
.btn-brand-blue {
  background-color: var(--kothari-blue);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 15px var(--kothari-blue-glow);
}

.btn-brand-blue:hover {
  background-color: var(--kothari-blue-light);
  color: #FFFFFF;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--kothari-blue-glow);
}

/* Secondary Engineered Outline Button */
.btn-secondary {
  background-color: rgba(21, 25, 28, 0.7);
  color: var(--color-offwhite);
  border: 1px solid var(--border-medium);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background-color: var(--color-steel);
  border-color: var(--color-warm-metal);
  color: var(--pure-white);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* Chamfered Technical Cutout Detail */
.btn-chamfer {
  clip-path: polygon(
    0 0,
    calc(100% - 10px) 0,
    100% 10px,
    100% 100%,
    10px 100%,
    0 calc(100% - 10px)
  );
}

.btn-industrial .btn-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.btn-industrial:hover .btn-arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   06. BULLET POINTS & TECHNICAL NUMBERING (NO CHECKMARKS)
   -------------------------------------------------------------------------- */
.tech-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tech-list-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 0.95rem;
  color: var(--color-warm-metal);
  line-height: 1.6;
}

.tech-list-item .pip {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  background-color: var(--accent-orange);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--accent-orange-glow);
}

.tech-list-item .pip-blue {
  background-color: var(--kothari-blue);
  box-shadow: 0 0 8px var(--kothari-blue-glow);
}

/* --------------------------------------------------------------------------
   07. NAVBAR: LOGO (LEFT) | NAVIGATION + CTA (RIGHT)
   -------------------------------------------------------------------------- */
.navbar-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(11, 13, 14, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: height var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar-header.scrolled {
  height: var(--header-compact-height);
  background-color: rgba(11, 13, 14, 0.98);
  border-bottom-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between; /* Distinct Left and Right placement */
  height: 100%;
  gap: 20px;
}

/* Left: Logo Only */
.brand-area {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-plate {
  display: flex;
  align-items: center;
  background-color: #FFFFFF;
  padding: 6px 14px;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.logo-plate:hover {
  transform: translateY(-1px);
  border-color: var(--kothari-blue);
  box-shadow: 0 4px 14px var(--kothari-blue-glow);
}

.logo-plate img {
  height: 38px;
  width: auto;
  max-width: 250px;
  object-fit: contain;
}

/* Center / Right: Navigation Links + Far-Right CTA */
.nav-right-group {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 32px);
  margin-left: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.4vw, 22px);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-warm-metal);
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--accent-orange);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--pure-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-quote-btn {
  padding: 10px 22px;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* Mobile Toggle Button */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--color-offwhite);
  width: 44px;
  height: 44px;
  border-radius: 2px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1001;
  transition: border-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--accent-orange);
}

.nav-toggle-icon {
  width: 20px;
  height: 14px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-offwhite);
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.nav-toggle.open .nav-toggle-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.open .nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open .nav-toggle-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   08. HERO SECTION: 3D MATERIAL OBJECT & CINEMATIC DEPTH
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 80px;
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 75% 35%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
              radial-gradient(circle at 25% 75%, rgba(201, 107, 50, 0.1) 0%, transparent 50%),
              linear-gradient(180deg, var(--color-graphite) 0%, var(--color-charcoal) 100%);
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('../assets/images/hero-industrial-bg.jpg');
  background-size: cover;
  background-position: center right;
  opacity: 0.18;
  mix-blend-mode: luminosity;
  pointer-events: none;
  filter: contrast(120%) brightness(75%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(40px, 5vw, 80px);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  padding: 6px 14px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pure-white);
  margin-bottom: 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

.hero-tag .tag-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--kothari-blue);
  box-shadow: 0 0 10px var(--kothari-blue);
}

.hero-title {
  font-size: clamp(2.5rem, 5.2vw, 4.75rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}

.hero-title-highlight {
  display: block;
  color: var(--accent-orange);
  position: relative;
}

.hero-positioning {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-warm-metal);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-positioning span {
  color: var(--kothari-blue-light);
}

.hero-description {
  font-size: clamp(1.05rem, 1.25vw, 1.2rem);
  color: var(--color-warm-metal);
  line-height: 1.7;
  max-width: 620px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-bottom: 48px;
}

.hero-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.hero-badge-item strong {
  color: var(--pure-white);
  font-family: var(--font-mono);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   09. HERO 3D MATERIAL BLOCK OBJECT & MULTI-SLIDE CAROUSEL
   -------------------------------------------------------------------------- */
.hero-stage-wrapper {
  perspective: 1200px;
  position: relative;
  z-index: 2;
}

.hero-card-3d {
  position: relative;
  background: linear-gradient(145deg, rgba(27, 33, 38, 0.95), rgba(15, 18, 20, 0.95));
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 24px;
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(255, 255, 255, 0.05);
  transform-style: preserve-3d;
  transition: transform var(--transition-fast);
}

.technical-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--kothari-blue);
  pointer-events: none;
  z-index: 10;
}

.technical-corner.tl { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
.technical-corner.tr { top: -1px; right: -1px; border-top: 2px solid; border-right: 2px solid; }
.technical-corner.bl { bottom: -1px; left: -1px; border-bottom: 2px solid; border-left: 2px solid; }
.technical-corner.br { bottom: -1px; right: -1px; border-bottom: 2px solid; border-right: 2px solid; }

/* --------------------------------------------------------------------------
   HERO 3D LAYERED MATERIAL COMPOSITION (SURFACE • MORTAR • STRUCTURAL BASE)
   -------------------------------------------------------------------------- */
.hero-stage-tabs {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-view-switch {
  display: flex;
  gap: 6px;
}

.hero-view-tab {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--color-text-muted);
  padding: 6px 12px;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hero-view-tab:hover {
  color: var(--pure-white);
  border-color: var(--border-bright);
}

.hero-view-tab.active {
  background: rgba(37, 99, 235, 0.2);
  border-color: var(--kothari-blue);
  color: var(--pure-white);
}

.hero-explode-toggle-btn {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  background: var(--color-charcoal);
  border: 1px solid var(--accent-orange);
  color: var(--accent-orange);
  padding: 5px 12px;
  border-radius: 2px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.hero-explode-toggle-btn:hover {
  background: var(--accent-orange);
  color: #FFFFFF;
}

.hero-material-container {
  position: relative;
  width: 100%;
  height: 350px;
  perspective: 1200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(30, 36, 42, 0.85) 0%, rgba(11, 13, 14, 0.98) 75%);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}

.hero-material-container.hidden {
  display: none;
}

.hero-slider-container.hidden {
  display: none;
}

.hero-material-assembly {
  position: relative;
  width: 250px;
  height: 170px;
  transform-style: preserve-3d;
  transform: rotateX(58deg) rotateZ(-30deg) rotateY(0deg);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.hero-material-assembly.floating {
  animation: materialFloat 7s ease-in-out infinite alternate;
}

@keyframes materialFloat {
  0% { transform: rotateX(58deg) rotateZ(-30deg) translateY(0px); }
  50% { transform: rotateX(56deg) rotateZ(-28deg) translateY(-8px); }
  100% { transform: rotateX(60deg) rotateZ(-32deg) translateY(6px); }
}

.material-shadow-floor {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 280px;
  height: 190px;
  margin-top: -95px;
  margin-left: -140px;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.8) 0%, transparent 70%);
  transform: translateZ(-110px);
  filter: blur(12px);
  pointer-events: none;
}

.material-slab {
  position: absolute;
  width: 230px;
  height: 150px;
  left: 10px;
  top: 10px;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.6s;
}

/* Layer 1: Top Acid Proof Tile Surface */
.slab-surface {
  transform: translateZ(36px);
}
.slab-surface .slab-face-top {
  background: linear-gradient(135deg, #C96B32 0%, #994819 100%);
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: inset 0 0 25px rgba(0,0,0,0.3);
  background-image: 
    linear-gradient(to right, rgba(255,255,255,0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 32px 32px;
}
.slab-surface .slab-face-front {
  background: #803C15;
  height: 20px;
}
.slab-surface .slab-face-side {
  background: #662E0E;
  width: 20px;
}

/* Layer 2: Middle Mortar / Bonding Layer */
.slab-mortar {
  transform: translateZ(0px);
}
.slab-mortar .slab-face-top {
  background: linear-gradient(135deg, #1C2329 0%, #0E1317 100%);
  border: 1px solid rgba(59, 130, 246, 0.35);
  box-shadow: inset 0 0 20px rgba(0,0,0,0.65);
}
.slab-mortar .slab-face-front {
  background: #14191E;
  height: 14px;
}
.slab-mortar .slab-face-side {
  background: #0B0E11;
  width: 14px;
}

/* Layer 3: Bottom Structural Concrete Base */
.slab-base {
  transform: translateZ(-36px);
}
.slab-base .slab-face-top {
  background: linear-gradient(135deg, #444D56 0%, #2D343C 100%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: inset 0 0 25px rgba(0,0,0,0.5);
}
.slab-base .slab-face-front {
  background: #232930;
  height: 28px;
}
.slab-base .slab-face-side {
  background: #191E23;
  width: 28px;
}

.slab-face {
  position: absolute;
  box-sizing: border-box;
}
.slab-face-top {
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}
.slab-face-front {
  width: 100%;
  bottom: 0;
  left: 0;
  transform-origin: bottom;
  transform: rotateX(-90deg);
}
.slab-face-side {
  height: 100%;
  top: 0;
  right: 0;
  transform-origin: right;
  transform: rotateY(90deg);
}

/* Separated State (Triggered on Scroll or by Slider) */
.hero-material-assembly.separated .slab-surface,
.hero-material-assembly[data-exploded="true"] .slab-surface {
  transform: translateZ(90px);
}
.hero-material-assembly.separated .slab-mortar,
.hero-material-assembly[data-exploded="true"] .slab-mortar {
  transform: translateZ(0px);
}
.hero-material-assembly.separated .slab-base,
.hero-material-assembly[data-exploded="true"] .slab-base {
  transform: translateZ(-90px);
}

.slab-callout-tag {
  position: absolute;
  right: -140px;
  top: 50%;
  margin-top: -14px;
  background: rgba(11, 13, 14, 0.95);
  border: 1px solid var(--border-bright);
  padding: 4px 10px;
  border-radius: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--pure-white);
  transform: rotateZ(30deg) rotateX(-58deg) translateZ(10px);
  pointer-events: none;
  box-shadow: 0 4px 15px rgba(0,0,0,0.7);
  transition: opacity 0.4s, transform 0.4s;
}
.slab-callout-tag::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 50%;
  width: 24px;
  height: 1px;
}
.slab-surface .slab-callout-tag {
  border-color: var(--accent-orange);
  color: #FFA566;
}
.slab-surface .slab-callout-tag::before {
  background: var(--accent-orange);
}
.slab-mortar .slab-callout-tag {
  border-color: var(--kothari-blue-light);
  color: #93C5FD;
}
.slab-mortar .slab-callout-tag::before {
  background: var(--kothari-blue-light);
}
.slab-base .slab-callout-tag {
  border-color: var(--border-medium);
  color: var(--color-warm-metal);
}
.slab-base .slab-callout-tag::before {
  background: var(--color-text-muted);
}

/* 3D Hero Slider Container */
.hero-slider-container {
  position: relative;
  width: 100%;
  height: 350px;
  overflow: hidden;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
  background-color: var(--color-graphite);
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96) translateZ(-40px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.6s;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateZ(0);
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 6s ease-out;
}

.hero-slide.active img {
  transform: scale(1.04);
}

.hero-slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 20px 24px;
  background: linear-gradient(0deg, rgba(11, 13, 14, 0.95) 0%, rgba(11, 13, 14, 0.6) 60%, transparent 100%);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  z-index: 2;
}

.slide-caption-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 4px;
}

.slide-caption-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
}

.slide-metric-val {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--kothari-blue-light);
  text-align: right;
}

.slide-metric-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  text-align: right;
}

.hero-slider-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.slider-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-dot {
  width: 24px;
  height: 3px;
  background-color: var(--border-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.slider-dot.active {
  width: 38px;
  background-color: var(--accent-orange);
  box-shadow: 0 0 10px var(--accent-orange-glow);
}

.slider-nav-arrows {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-btn {
  width: 36px;
  height: 36px;
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--border-medium);
  color: var(--color-offwhite);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 2px;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.slider-btn:hover {
  background-color: var(--accent-orange);
  color: #FFFFFF;
  border-color: var(--accent-orange);
}

.hero-floating-spec {
  position: absolute;
  bottom: -25px;
  left: -25px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-bright);
  padding: 14px 20px;
  border-radius: 2px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  gap: 16px;
  transform: translateZ(40px);
  z-index: 5;
}

.floating-spec-icon {
  width: 36px;
  height: 36px;
  background-color: rgba(28, 40, 78, 0.6);
  border: 1px solid var(--kothari-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pure-white);
  flex-shrink: 0;
}

.floating-spec-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.floating-spec-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--pure-white);
}

/* --------------------------------------------------------------------------
   10. METRIC TICKER & STATISTICS SECTION
   -------------------------------------------------------------------------- */
.metric-ticker-bar {
  background-color: var(--color-charcoal);
  border-top: 1px solid var(--border-medium);
  border-bottom: 1px solid var(--border-medium);
  padding: 34px 0;
  position: relative;
  z-index: 5;
}

.ticker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.ticker-item {
  display: flex;
  flex-direction: column;
  padding: 0 16px;
  border-left: 2px solid var(--border-subtle);
  transition: border-color var(--transition-fast);
}

.ticker-item:hover {
  border-left-color: var(--accent-orange);
}

.ticker-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--pure-white);
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.ticker-number .unit {
  font-size: 1.25rem;
  color: var(--accent-orange);
  font-weight: 700;
}

.ticker-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   11. ABOUT SECTION WITH EDITORIAL LAYOUT & 3D TIMELINE
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: clamp(36px, 5vw, 64px);
  align-items: stretch;
}

.about-visual-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
  height: 100%;
}

.about-primary-photo {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  background-color: var(--color-charcoal);
  height: 350px;
  flex-shrink: 0;
}

.about-primary-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.about-primary-photo:hover img {
  transform: scale(1.05);
}

.about-caption-badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: rgba(11, 13, 14, 0.92);
  border: 1px solid var(--border-bright);
  padding: 6px 14px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--pure-white);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}

.about-caption-badge .tag-dot {
  width: 7px;
  height: 7px;
  background-color: var(--accent-orange);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-orange);
}

.about-secondary-row {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  flex-grow: 1;
}

.about-secondary-photo {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  background-color: var(--color-charcoal);
  min-height: 200px;
}

.about-secondary-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.about-secondary-photo:hover img {
  transform: scale(1.06);
}

.about-spec-plate {
  background: linear-gradient(155deg, rgba(27, 34, 40, 0.95) 0%, rgba(15, 19, 22, 0.98) 100%);
  border: 1px solid var(--border-bright);
  border-radius: 2px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  position: relative;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.about-spec-plate-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
}

.about-spec-plate-stat {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--pure-white);
  line-height: 1.2;
}

.about-spec-plate-meta {
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
}

.about-story-column {
  display: flex;
  flex-direction: column;
}

.about-editorial-statement {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1.8vw, 1.75rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--pure-white);
  margin-bottom: 20px;
  border-left: 3px solid var(--kothari-blue);
  padding-left: 20px;
}

.about-prose {
  font-size: 1rem;
  color: var(--color-warm-metal);
  line-height: 1.75;
  margin-bottom: 24px;
}

/* 3D Vertical Animated Timeline */
.timeline-track {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 10px;
}

.timeline-track::before {
  content: '';
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--kothari-blue) 0%, var(--accent-orange) 100%);
}

.timeline-node {
  display: flex;
  gap: 18px;
  position: relative;
  z-index: 2;
  align-items: flex-start;
}

.timeline-marker {
  width: 42px;
  height: 42px;
  background-color: var(--color-surface-elevated);
  border: 2px solid var(--kothari-blue);
  color: var(--pure-white);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 14px rgba(0, 0, 0, 0.85);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.timeline-node:hover .timeline-marker {
  border-color: var(--accent-orange);
  background-color: var(--color-steel);
  box-shadow: 0 0 14px var(--accent-orange-glow);
  transform: scale(1.05);
}

.timeline-node-content {
  background: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 14px 18px;
  flex-grow: 1;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-node:hover .timeline-node-content {
  border-color: var(--border-medium);
  transform: translateX(4px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

.timeline-node-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 4px;
}

.timeline-node-desc {
  font-size: 0.84rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   12. FULL-WIDTH PARALLAX IMAGE SECTION ("PROTECTION AGAINST THE PROCESS")
   -------------------------------------------------------------------------- */
.parallax-showcase-section {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
  background-color: var(--color-graphite);
  border-top: 1px solid var(--border-medium);
  border-bottom: 1px solid var(--border-medium);
}

.parallax-bg-layer {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 140%;
  background-image: url('../assets/images/chemical-processing-hall.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.28;
  filter: contrast(130%) brightness(65%);
  will-change: transform;
}

.parallax-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: url('../assets/textures/grid-blueprint.svg');
  opacity: 0.5;
  pointer-events: none;
}

.parallax-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.parallax-headline {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--pure-white);
}

/* --------------------------------------------------------------------------
   13. 3D PRODUCT SHOWCASE SECTION WITH MATERIAL / APPLICATION / PROTECTION
   -------------------------------------------------------------------------- */
.products-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  color: var(--color-warm-metal);
  padding: 10px 20px;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--border-bright);
  color: var(--pure-white);
}

.filter-btn.active {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: var(--kothari-blue);
  color: var(--pure-white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  transform-style: preserve-3d;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-orange);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.8);
}

.product-card-header {
  padding: 24px 24px 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border-subtle);
  transform: translateZ(20px);
}

.product-card-index {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-orange);
  letter-spacing: -0.02em;
  transition: transform var(--transition-normal);
}

.product-card:hover .product-card-index {
  transform: translateZ(-20px);
}

.product-card-spec-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--kothari-blue-light);
  letter-spacing: 0.08em;
  background-color: var(--color-surface-elevated);
  padding: 3px 8px;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.product-media {
  position: relative;
  height: 230px;
  overflow: hidden;
  background-color: var(--color-graphite);
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-media img {
  transform: scale(1.08) translateZ(30px);
}

/* Overlays: MATERIAL • APPLICATION • PROTECTION */
.product-pillars-strip {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  gap: 6px;
  z-index: 3;
}

.pillar-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 6px;
  border-radius: 2px;
  background-color: rgba(11, 13, 14, 0.85);
  border: 1px solid var(--border-subtle);
  color: var(--color-warm-metal);
}

.product-trade-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: rgba(11, 13, 14, 0.92);
  border: 1px solid var(--border-medium);
  padding: 4px 10px;
  border-radius: 2px;
  z-index: 3;
}

.product-trade-badge img {
  height: 18px;
  width: auto;
}

.product-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  transform: translateZ(25px);
}

.product-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--pure-white);
}

.product-brief {
  font-size: 0.9375rem;
  color: var(--color-warm-metal);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.product-specs-matrix {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spec-matrix-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
}

.spec-matrix-label {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.spec-matrix-val {
  color: var(--pure-white);
  font-family: var(--font-mono);
  font-weight: 600;
  text-align: right;
}

.product-card-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

/* --------------------------------------------------------------------------
   14. INTERACTIVE 3D CROSS SECTION ("HOW THE SYSTEM PROTECTS")
   -------------------------------------------------------------------------- */
.system-protect-section {
  background-color: var(--color-graphite);
  position: relative;
  overflow: hidden;
}

.system-protect-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

/* Interactive Exploded 3D Stage */
.exploded-stage-container {
  position: relative;
  background: radial-gradient(circle at center, rgba(30, 36, 42, 0.7) 0%, rgba(11, 13, 14, 0.95) 80%);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 24px;
  box-shadow: var(--shadow-elevated);
}

.exploded-stage-container img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.separation-slider-bar {
  margin-top: 20px;
  padding: 16px 20px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.separation-slider-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-warm-metal);
  text-transform: uppercase;
  white-space: nowrap;
}

.separation-range-input {
  flex-grow: 1;
  accent-color: var(--accent-orange);
  cursor: pointer;
}

.protect-layer-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 30px;
}

.protect-layer-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.protect-layer-card:hover,
.protect-layer-card.active {
  background-color: var(--color-steel);
  border-color: var(--kothari-blue);
  transform: translateX(6px);
}

.protect-layer-idx {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--kothari-blue-light);
  width: 24px;
}

.protect-layer-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pure-white);
  flex-grow: 1;
}

.protect-layer-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.protect-active-note {
  margin-top: 20px;
  padding: 16px 20px;
  background-color: var(--color-charcoal);
  border-left: 3px solid var(--kothari-blue);
  border-radius: 2px;
}

.protect-note-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.protect-note-desc {
  font-size: 0.875rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   15. SOLUTIONS SECTION - 3D ARCHITECTURAL GRID & UNIQUE EFFECTS
   -------------------------------------------------------------------------- */
.workflow-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-top: 40px;
  margin-bottom: 50px;
}

.workflow-card {
  background: linear-gradient(145deg, var(--color-charcoal) 0%, rgba(20, 24, 28, 0.95) 100%);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.workflow-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-orange);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.workflow-stage-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-orange);
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.workflow-stage-num::after {
  content: '→';
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.workflow-card:last-child .workflow-stage-num::after {
  content: '•';
  color: var(--kothari-blue-light);
  font-size: 1.5rem;
}

.workflow-stage-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.workflow-stage-desc {
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
  line-height: 1.55;
}

/* 3D Solutions Architectural Grid */
.solutions-3d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  perspective: 1200px;
}

.solution-card-3d {
  position: relative;
  background: linear-gradient(155deg, rgba(27, 34, 40, 0.95) 0%, rgba(15, 19, 22, 0.98) 100%);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.4s, 
              box-shadow 0.4s;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.65);
}

.solution-card-3d:hover {
  transform: translateY(-8px) rotateX(4deg) translateZ(12px);
  border-color: var(--accent-orange);
  box-shadow: 
    0 24px 60px rgba(0, 0, 0, 0.85),
    0 0 20px var(--accent-orange-glow);
}

.solution-3d-media {
  position: relative;
  height: 220px;
  overflow: hidden;
  background-color: var(--color-graphite);
  border-bottom: 1px solid var(--border-subtle);
  transform-style: preserve-3d;
}

.solution-3d-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.75s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s;
  filter: contrast(110%) brightness(85%);
}

.solution-card-3d:hover .solution-3d-media img {
  transform: scale(1.08) translateZ(20px);
  filter: contrast(120%) brightness(100%);
}

.solution-3d-index {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-orange);
  background: rgba(11, 13, 14, 0.9);
  border: 1px solid rgba(201, 107, 50, 0.4);
  padding: 4px 10px;
  border-radius: 2px;
  z-index: 3;
  transform: translateZ(30px);
  box-shadow: 0 4px 14px rgba(0,0,0,0.6);
  letter-spacing: -0.02em;
}

.solution-3d-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--kothari-blue-light);
  background: rgba(11, 13, 14, 0.9);
  border: 1px solid var(--border-medium);
  padding: 5px 10px;
  border-radius: 2px;
  z-index: 3;
  transform: translateZ(25px);
  text-transform: uppercase;
}

.solution-3d-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  position: relative;
  z-index: 2;
  transform: translateZ(25px);
}

.solution-3d-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 12px;
  line-height: 1.3;
}

.solution-3d-desc {
  font-size: 0.8875rem;
  color: var(--color-warm-metal);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.solution-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.solution-chip {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  background-color: var(--color-surface-elevated);
  padding: 4px 9px;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.solution-3d-cta {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-orange);
  padding: 11px 16px;
  background: rgba(201, 107, 50, 0.08);
  border: 1px solid rgba(201, 107, 50, 0.3);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.solution-card-3d:hover .solution-3d-cta {
  background: var(--accent-orange);
  color: var(--pure-white);
  border-color: var(--accent-orange);
  box-shadow: 0 4px 15px var(--accent-orange-glow);
}

.solution-3d-cta .cta-arrow {
  transition: transform var(--transition-fast);
}

.solution-card-3d:hover .solution-3d-cta .cta-arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   15. PROJECT SHOWCASE & INSTALLATION GALLERY (GRID & LIST FORMATS)
   -------------------------------------------------------------------------- */
.gallery-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.gallery-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.gallery-filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  color: var(--color-warm-metal);
  padding: 8px 16px;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-filter-btn:hover {
  border-color: var(--border-bright);
  color: var(--pure-white);
}

.gallery-filter-btn.active {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: var(--kothari-blue);
  color: var(--pure-white);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.25);
}

.gallery-format-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  padding: 3px;
  border-radius: 2px;
}

.gallery-format-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: transparent;
  border: none;
  color: var(--color-warm-metal);
  padding: 6px 12px;
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.gallery-format-btn:hover {
  color: var(--pure-white);
}

.gallery-format-btn.active {
  background-color: var(--color-surface-elevated);
  color: var(--accent-orange);
  border: 1px solid var(--border-medium);
}

/* Gallery Grid (Compact 3-Column Architectural Grid) */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  transition: all 0.3s ease;
}

.gallery-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
}

.gallery-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-orange);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.75), 0 0 15px var(--accent-orange-glow);
}

.gallery-media {
  position: relative;
  height: 220px;
  width: 100%;
  overflow: hidden;
  background-color: var(--color-graphite);
  border-bottom: 1px solid var(--border-subtle);
}

.gallery-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s;
  filter: contrast(108%) brightness(90%);
}

.gallery-card:hover .gallery-media img {
  transform: scale(1.07);
  filter: contrast(115%) brightness(100%);
}

.gallery-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(11, 13, 14, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 10px;
  border-radius: 2px;
  color: var(--pure-white);
  z-index: 2;
}

.gallery-zoom-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 13, 14, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  color: var(--color-offwhite);
  opacity: 0;
  transform: scale(0.85);
  transition: all var(--transition-fast);
  z-index: 2;
  cursor: pointer;
  font-size: 1.1rem;
}

.gallery-card:hover .gallery-zoom-indicator {
  opacity: 1;
  transform: scale(1);
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.gallery-card-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
}

.gallery-card-top {
  margin-bottom: 12px;
}

.gallery-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--kothari-blue-light);
  margin-bottom: 6px;
}

.gallery-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-offwhite);
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

.gallery-card:hover .gallery-title {
  color: var(--accent-orange);
}

.gallery-meta {
  font-family: var(--font-mono);
  font-size: 0.78125rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
  display: block;
}

.gallery-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.gallery-chip {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--color-offwhite);
  padding: 3px 8px;
  border-radius: 2px;
}

/* Alternate Format: Row / List View */
.gallery-grid.format-list {
  grid-template-columns: 1fr;
  gap: 18px;
}

.gallery-grid.format-list .gallery-card {
  flex-direction: row;
  align-items: stretch;
}

.gallery-grid.format-list .gallery-media {
  width: 320px;
  height: auto;
  min-height: 200px;
  flex-shrink: 0;
  border-bottom: none;
  border-right: 1px solid var(--border-subtle);
}

.gallery-grid.format-list .gallery-card-body {
  padding: 24px 28px;
}

/* Filter hidden state */
.gallery-card.hidden {
  display: none !important;
}

/* Lightbox Modal */
.gallery-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 13, 14, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.gallery-modal.visible {
  opacity: 1;
  visibility: visible;
}

.gallery-modal-dialog {
  background: var(--color-charcoal);
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  max-width: 960px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.9);
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-modal.visible .gallery-modal-dialog {
  transform: translateY(0) scale(1);
}

.gallery-modal-img-wrap {
  position: relative;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.gallery-modal-img-wrap img {
  width: 100%;
  height: 100%;
  max-height: 520px;
  object-fit: cover;
}

.gallery-modal-info {
  padding: 32px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}

.gallery-modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  background: rgba(11, 13, 14, 0.85);
  border: 1px solid var(--border-medium);
  color: var(--color-offwhite);
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  transition: all var(--transition-fast);
  z-index: 10;
}

.gallery-modal-close-btn:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .gallery-grid.format-list .gallery-card {
    flex-direction: column;
  }
  .gallery-grid.format-list .gallery-media {
    width: 100%;
    height: 200px;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .gallery-modal-dialog {
    grid-template-columns: 1fr;
    max-height: 85vh;
  }
  .gallery-modal-img-wrap img {
    max-height: 260px;
  }
}

@media (max-width: 640px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .gallery-media {
    height: 200px;
  }
  .gallery-controls-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* --------------------------------------------------------------------------
   16. TECHNICAL DATA SECTION (ENGINEERING DATA INTERFACE)
   -------------------------------------------------------------------------- */
.technical-data-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  box-shadow: var(--shadow-elevated);
  overflow: hidden;
}

.tech-card-header {
  padding: 20px 28px;
  background-color: var(--color-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.tech-tabs-nav {
  display: flex;
  gap: 8px;
}

.tech-tab-btn {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--color-text-muted);
  padding: 8px 18px;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tech-tab-btn:hover {
  color: var(--pure-white);
  border-color: var(--border-bright);
}

.tech-tab-btn.active {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: var(--kothari-blue);
  color: var(--kothari-blue-light);
}

.tech-card-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tech-card-meta .indicator-dot {
  width: 6px;
  height: 6px;
  background-color: #38b000;
  border-radius: 50%;
  box-shadow: 0 0 6px #38b000;
}

.tech-table-scroll-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
  min-width: 780px;
}

.tech-table th {
  background-color: var(--color-surface-elevated);
  color: var(--pure-white);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-medium);
  white-space: nowrap;
}

.tech-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--color-warm-metal);
  font-family: var(--font-body);
}

.tech-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

.tech-table td.val-bold {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--pure-white);
}

.tech-table td.val-highlight {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-orange);
}

.tech-table td.val-code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
}

.tech-table-footer-note {
  padding: 16px 28px;
  background-color: var(--color-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

/* Animated Technical Measurement Lines & Graphic */
.dimension-graphic-card {
  margin-top: 24px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 30px;
  align-items: center;
}

.dimension-render-box {
  position: relative;
  background-color: var(--color-graphite);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 40px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.measurement-tile-visual {
  position: relative;
  width: 190px;
  height: 110px;
  background: linear-gradient(135deg, #C96B32 0%, #8A3B0F 100%);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--pure-white);
  letter-spacing: 0.06em;
}

.dim-arrow-horiz {
  position: absolute;
  top: -24px;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--accent-orange);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}
.dim-arrow-horiz::before,
.dim-arrow-horiz::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background-color: var(--accent-orange);
  margin: 0 8px;
}

.dim-arrow-vert {
  position: absolute;
  right: -38px;
  top: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  color: var(--kothari-blue-light);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}
.dim-arrow-vert::before,
.dim-arrow-vert::after {
  content: '';
  flex-grow: 1;
  width: 1px;
  background-color: var(--kothari-blue-light);
  margin: 6px 0;
}

.dimension-info-content h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 8px;
}

.dimension-info-content p {
  font-size: 0.875rem;
  color: var(--color-warm-metal);
  line-height: 1.6;
  margin-bottom: 14px;
}

.dimension-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dimension-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  color: var(--pure-white);
}

/* --------------------------------------------------------------------------
   17. INDUSTRIES 3D GRID (WITH PHOTOGRAPHY)
   -------------------------------------------------------------------------- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.industry-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  min-height: 240px;
}

.industry-card-bg {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  transition: opacity var(--transition-normal), transform var(--transition-slow);
}

.industry-card-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.industry-card:hover .industry-card-bg {
  opacity: 0.35;
  transform: scale(1.08);
}

.industry-card-content {
  position: relative;
  z-index: 2;
  padding: 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: linear-gradient(180deg, rgba(19, 23, 26, 0.7) 0%, rgba(19, 23, 26, 0.95) 100%);
}

.industry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0%;
  background-color: var(--kothari-blue);
  transition: height var(--transition-normal);
  z-index: 3;
}

.industry-card:hover {
  border-color: var(--kothari-blue);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
}

.industry-card:hover::before {
  height: 100%;
}

.industry-icon-wrap {
  width: 36px;
  height: 36px;
  color: var(--kothari-blue-light);
  margin-bottom: 14px;
}

.industry-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 8px;
}

.industry-desc {
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
  flex-grow: 1;
}

.industry-structures-tag {
  margin-top: 14px;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--pure-white);
  background-color: rgba(28, 40, 78, 0.8);
  border: 1px solid rgba(37, 99, 235, 0.3);
  padding: 4px 8px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   18. WHY KOTHARI SECTION (01 - 06 INDUSTRIAL NUMBERING)
   -------------------------------------------------------------------------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.why-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 32px 28px;
  position: relative;
  transition: all var(--transition-normal);
}

.why-card:hover {
  background-color: var(--color-steel);
  border-color: var(--accent-orange);
  transform: translateY(-4px);
  box-shadow: var(--shadow-subtle);
}

.why-card-num {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-orange);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1;
}

.why-card-line {
  width: 32px;
  height: 2px;
  background-color: var(--border-medium);
  margin-bottom: 20px;
  transition: width var(--transition-fast), background-color var(--transition-fast);
}

.why-card:hover .why-card-line {
  width: 56px;
  background-color: var(--accent-orange);
}

.why-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.why-card-desc {
  font-size: 0.9375rem;
  color: var(--color-warm-metal);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   19. FAQ SECTION - ACCORDION
   -------------------------------------------------------------------------- */
.faq-wrap {
  max-width: 940px;
  margin-left: auto;
  margin-right: auto;
}

.faq-search-box {
  margin-bottom: 32px;
  position: relative;
}

.faq-search-input {
  width: 100%;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  color: var(--pure-white);
  padding: 14px 20px 14px 46px;
  border-radius: 2px;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.faq-search-input:focus {
  border-color: var(--kothari-blue);
  outline: none;
}

.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
}

.faq-item {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  margin-bottom: 14px;
  transition: border-color var(--transition-fast);
}

.faq-item:hover,
.faq-item.open {
  border-color: var(--border-medium);
}

.faq-item.open {
  border-left: 3px solid var(--kothari-blue);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 22px 26px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--pure-white);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--kothari-blue-light);
  font-weight: 700;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer-panel {
  padding: 0 26px 24px 26px;
  font-size: 0.95rem;
  color: var(--color-warm-metal);
  line-height: 1.7;
  display: none;
}

.faq-item.open .faq-answer-panel {
  display: block;
  animation: faqFadeIn 0.25s ease-out;
}

@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   20. CONTACT & ENQUIRY SECTION (WITH INDUSTRIAL BACKDROP)
   -------------------------------------------------------------------------- */
.contact-section {
  position: relative;
  background-color: var(--color-graphite);
  overflow: hidden;
}

.contact-bg-layer {
  position: absolute;
  inset: 0;
  background-image: url('../assets/images/chemical-plant-floor.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  filter: contrast(120%) brightness(70%);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
  position: relative;
  z-index: 2;
}

.contact-info-block {
  display: flex;
  flex-direction: column;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.contact-detail-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 20px;
  display: flex;
  gap: 16px;
  transition: border-color var(--transition-fast);
}

.contact-detail-card:hover {
  border-color: var(--border-medium);
}

.contact-detail-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-detail-val {
  font-size: 0.95rem;
  color: var(--pure-white);
  line-height: 1.6;
}

.contact-detail-val a:hover {
  color: var(--accent-orange);
}

.enquiry-form-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--shadow-elevated);
}

.enquiry-form-title {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--pure-white);
  margin-bottom: 8px;
}

.enquiry-form-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pure-white);
  font-weight: 600;
}

.form-input,
.form-select,
.form-textarea {
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  padding: 13px 16px;
  color: var(--pure-white);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--kothari-blue);
  background-color: var(--color-steel);
  box-shadow: 0 0 0 1px var(--kothari-blue);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

.form-field-error {
  font-size: 0.75rem;
  color: #ff595e;
  font-family: var(--font-mono);
  display: none;
}

.form-field.has-error .form-input,
.form-field.has-error .form-textarea {
  border-color: #ff595e;
}

.form-field.has-error .form-field-error {
  display: block;
}

.form-submit-row {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-success-banner {
  display: none;
  background-color: rgba(56, 176, 0, 0.12);
  border: 1px solid #38b000;
  border-radius: 2px;
  padding: 18px 20px;
  margin-top: 20px;
}

.form-success-banner.visible {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.form-success-icon {
  font-family: var(--font-mono);
  color: #38b000;
  font-weight: 800;
  font-size: 1.125rem;
}

.form-success-heading {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.form-success-text {
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
}

.form-error-banner {
  display: none;
  background-color: rgba(239, 68, 68, 0.12);
  border: 1px solid #ef4444;
  border-radius: 2px;
  padding: 18px 20px;
  margin-top: 20px;
}

.form-error-banner.visible {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.form-error-icon {
  font-family: var(--font-mono);
  color: #ef4444;
  font-weight: 800;
  font-size: 1.125rem;
}

.form-error-heading {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.form-error-text {
  font-size: 0.8125rem;
  color: var(--color-warm-metal);
  line-height: 1.5;
}

.btn-industrial:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(40%);
}

/* --------------------------------------------------------------------------
   21. FLOATING WHATSAPP CTA
   -------------------------------------------------------------------------- */
.whatsapp-floating-cta {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.whatsapp-btn-circle {
  width: 58px;
  height: 58px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.whatsapp-floating-cta:hover .whatsapp-btn-circle {
  transform: scale(1.08);
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.6);
}

.whatsapp-pulse-ring {
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 2px solid #25D366;
  border-radius: 50%;
  animation: waPulse 2s infinite ease-out;
  pointer-events: none;
}

@keyframes waPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.4); opacity: 0; }
}

.whatsapp-tooltip {
  position: absolute;
  right: 70px;
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-medium);
  color: var(--pure-white);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 2px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateX(8px);
  transition: all var(--transition-fast);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
}

.whatsapp-floating-cta:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* --------------------------------------------------------------------------
   22. FOOTER ARCHITECTURE
   -------------------------------------------------------------------------- */
.footer-industrial {
  background-color: var(--color-graphite);
  border-top: 1px solid var(--border-medium);
  padding-top: 80px;
  padding-bottom: 30px;
  position: relative;
  z-index: 10;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
}

.footer-logo-plate {
  margin-bottom: 20px;
  display: inline-block;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-trade-stamp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--kothari-blue-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pure-white);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-col-title::after {
  content: '';
  width: 14px;
  height: 2px;
  background-color: var(--kothari-blue);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--color-warm-metal);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-orange);
  transform: translateX(3px);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-admin-link {
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.footer-admin-link:hover {
  color: var(--color-text-muted);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   23. LOCAL ENQUIRY INSPECTION MODAL
   -------------------------------------------------------------------------- */
.admin-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.admin-modal.visible {
  display: flex;
}

.admin-modal-card {
  background-color: var(--color-charcoal);
  border: 1px solid var(--border-bright);
  border-radius: 2px;
  width: 100%;
  max-width: 820px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9);
}

.admin-modal-header {
  padding: 18px 24px;
  background-color: var(--color-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-modal-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-warm-metal);
  text-transform: uppercase;
}

.admin-modal-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 0.875rem;
}

.admin-json-box {
  background-color: var(--color-graphite);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #38b000;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 380px;
  overflow-y: auto;
}

.admin-modal-actions {
  padding: 16px 24px;
  background-color: var(--color-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
}

/* --------------------------------------------------------------------------
   24. RESPONSIVENESS & MEDIA QUERIES
   -------------------------------------------------------------------------- */
@media (max-width: 1440px) {
  :root {
    --container-max: 1260px;
  }
}

@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .hero-stage-wrapper {
    max-width: 620px;
    margin: 0 auto;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .industries-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
}

@media (max-width: 1024px) {
  .nav-right-group {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 320px;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-charcoal);
    border-left: 1px solid var(--border-medium);
    flex-direction: column;
    align-items: flex-start;
    padding: 30px;
    gap: 20px;
    transition: right var(--transition-normal);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.7);
    overflow-y: auto;
    z-index: 1000;
  }

  .nav-menu.open {
    right: 0;
  }

  .about-grid,
  .system-protect-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ticker-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .workflow-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .workflow-card:last-child {
    grid-column: 1 / -1;
  }

  .jobworks-grid,
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 72px;
    --header-compact-height: 64px;
  }

  .logo-plate img {
    height: 30px;
    max-width: 190px;
  }

  .products-grid,
  .jobworks-grid,
  .industries-grid,
  .why-grid {
    grid-template-columns: 1fr;
  }

  .about-photos-container {
    grid-template-columns: 1fr;
  }

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

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

  .workflow-card:last-child {
    grid-column: auto;
  }

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

  .ticker-item {
    border-left: 3px solid var(--accent-orange);
    padding-left: 16px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .whatsapp-floating-cta {
    bottom: 20px;
    right: 20px;
  }

  .whatsapp-tooltip {
    display: none;
  }

  .hero-floating-spec {
    position: static;
    margin-top: 16px;
    transform: none;
  }
}

@media (max-width: 600px) {
  .hero-material-container {
    height: 300px;
  }
  .hero-material-assembly {
    transform: scale(0.8) rotateX(58deg) rotateZ(-30deg) rotateY(0deg);
  }
  .dimension-graphic-card {
    grid-template-columns: 1fr;
  }
  .dimension-render-box {
    padding: 30px 10px;
  }
  .measurement-tile-visual {
    width: 150px;
    height: 90px;
  }
  .slab-callout-tag {
    display: none;
  }
}

@media (max-width: 430px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn-industrial {
    width: 100%;
  }

  .nav-menu {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero-card-3d {
    transform: none !important;
  }

  .whatsapp-pulse-ring {
    display: none !important;
  }
}