/* Fonts are preconnected + loaded via <link> in each HTML <head> for faster first paint.
   Kept as a non-blocking fallback for pages that embed style.css standalone. */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@500;600;700;800&family=Outfit:wght@300;400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ==========================================================================
   BUX INDUSTRIES — LIQUID GLASS & BRUSHED METAL DESIGN SYSTEM (V2 EVOLUTION)
   ========================================================================== */

:root {
  /* Typography */
  --font-display: 'Syne', 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Outfit', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Obsidian & Stealth Dark Metallurgy Canvas */
  --bg-dark: #07080a;
  --bg-deep: #0b0d11;
  --bg-surface: #101318;
  --bg-surface-elevated: #161a22;
  --bg-glass: rgba(16, 19, 24, 0.72);
  --bg-glass-heavy: rgba(11, 13, 17, 0.88);
  --bg-glass-light: rgba(255, 255, 255, 0.04);
  --bg-input: rgba(7, 8, 10, 0.65);

  /* Metallic Accents & Finishes */
  --metal-titanium: #798394;
  --metal-titanium-dark: #222731;
  --metal-titanium-light: #a9b3c4;
  --metal-chrome: #e2e8f0;
  --metal-gold: #f3c623;
  --metal-gold-bright: #ffd447;
  --metal-gold-dark: #c89d14;
  --metal-bronze: #d97736;
  --metal-cyan: #38bdf8;
  --metal-emerald: #10b981;

  /* Typography Colors */
  --color-text-main: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --color-text-gold: #f3c623;

  /* Borders & Specular Highlights */
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glass-bright: rgba(255, 255, 255, 0.22);
  --border-metal: rgba(121, 131, 148, 0.25);
  --border-gold: rgba(243, 198, 35, 0.35);

  /* Gradients */
  --gradient-gold: linear-gradient(135deg, #ffd447 0%, #f3c623 50%, #c89d14 100%);
  --gradient-chrome: linear-gradient(135deg, #ffffff 0%, #cbd5e1 50%, #94a3b8 100%);
  --gradient-titanium: linear-gradient(135deg, #2a313e 0%, #171b22 100%);
  --gradient-metal-bar: linear-gradient(90deg, #101318 0%, #161a22 50%, #101318 100%);
  --gradient-glass-card: linear-gradient(135deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.015) 100%);

  /* Shadows & Specular Glows */
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-glass: 0 20px 45px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  --shadow-glass-hover: 0 25px 60px rgba(0, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  --shadow-gold-glow: 0 0 35px rgba(243, 198, 35, 0.25);
  --shadow-cyan-glow: 0 0 30px rgba(56, 189, 248, 0.25);

  /* Dimensions */
  --header-height: 86px;
  --ticker-height: 40px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme — Brushed Silver & Platinum Aluminum */
:root.light-theme,
body.light-theme {
  --bg-dark: #f1f5f9;
  --bg-deep: #e2e8f0;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-glass-heavy: rgba(255, 255, 255, 0.96);
  --bg-glass-light: rgba(0, 0, 0, 0.04);
  --bg-input: #ffffff;

  --metal-titanium: #475569;
  --metal-titanium-dark: #cbd5e1;
  --metal-titanium-light: #334155;
  --metal-chrome: #0f172a;
  --metal-gold: #b45309;
  --metal-gold-bright: #d97706;
  --metal-gold-dark: #92400e;

  --color-text-main: #0f172a;
  --color-text-muted: #334155;
  --color-text-dim: #64748b;
  --color-text-gold: #b45309;

  --border-glass: rgba(15, 23, 42, 0.12);
  --border-glass-bright: rgba(15, 23, 42, 0.22);
  --border-metal: rgba(71, 85, 105, 0.25);
  --border-gold: rgba(217, 119, 6, 0.4);

  --gradient-titanium: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
  --gradient-glass-card: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-glass: 0 10px 30px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-glass-hover: 0 20px 45px rgba(0, 0, 0, 0.14), 0 2px 6px rgba(0, 0, 0, 0.08);
  --shadow-gold-glow: 0 0 25px rgba(217, 119, 6, 0.2);
}

:root.light-theme body,
body.light-theme {
  background-color: #f1f5f9 !important;
  color: #0f172a !important;
}

:root.light-theme body::before,
body.light-theme::before {
  opacity: 0.15 !important;
}

:root.light-theme #webglBgCanvas,
body.light-theme #webglBgCanvas {
  opacity: 0.10 !important;
  filter: invert(0.9) brightness(1.1);
}

:root.light-theme .theme-btn .sun-icon,
body.light-theme .theme-btn .sun-icon {
  display: none !important;
}

:root.light-theme .theme-btn .moon-icon,
body.light-theme .theme-btn .moon-icon {
  display: block !important;
}

:root.light-theme .header,
body.light-theme .header {
  background: rgba(255, 255, 255, 0.94) !important;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08) !important;
}

:root.light-theme .nav-link,
body.light-theme .nav-link {
  color: #334155 !important;
}

:root.light-theme .nav-link:hover,
body.light-theme .nav-link:hover,
:root.light-theme .nav-link.active,
body.light-theme .nav-link.active {
  color: #0f172a !important;
}

:root.light-theme .glass-card,
body.light-theme .glass-card,
:root.light-theme .product-card,
body.light-theme .product-card,
:root.light-theme .portfolio-card,
body.light-theme .portfolio-card,
:root.light-theme .quote-form-container,
body.light-theme .quote-form-container,
:root.light-theme .facade-controls-card,
body.light-theme .facade-controls-card,
:root.light-theme .config-controls-card,
body.light-theme .config-controls-card,
:root.light-theme .contact-info-block,
body.light-theme .contact-info-block,
:root.light-theme .visualizer-container,
body.light-theme .visualizer-container {
  background: #ffffff !important;
  border-color: rgba(15, 23, 42, 0.12) !important;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.07) !important;
  color: #0f172a !important;
}

:root.light-theme h1, body.light-theme h1,
:root.light-theme h2, body.light-theme h2,
:root.light-theme h3, body.light-theme h3,
:root.light-theme h4, body.light-theme h4,
:root.light-theme .product-title, body.light-theme .product-title,
:root.light-theme .portfolio-title, body.light-theme .portfolio-title {
  color: #0f172a !important;
}

:root.light-theme p, body.light-theme p,
:root.light-theme .product-desc, body.light-theme .product-desc {
  color: #334155 !important;
}

:root.light-theme input, body.light-theme input,
:root.light-theme select, body.light-theme select,
:root.light-theme textarea, body.light-theme textarea {
  background: #f8fafc !important;
  color: #0f172a !important;
  border-color: rgba(15, 23, 42, 0.18) !important;
}

:root.light-theme .file-dropzone,
body.light-theme .file-dropzone {
  background: #f8fafc !important;
  border-color: rgba(15, 23, 42, 0.18) !important;
}

:root.light-theme .filter-tab,
body.light-theme .filter-tab {
  background: #ffffff !important;
  color: #475569 !important;
  border-color: rgba(15, 23, 42, 0.15) !important;
}

:root.light-theme .filter-tab.active,
body.light-theme .filter-tab.active {
  background: #0f172a !important;
  color: #ffffff !important;
  border-color: #0f172a !important;
}

:root.light-theme .config-swatch-pill,
body.light-theme .config-swatch-pill,
:root.light-theme .material-chip,
body.light-theme .material-chip {
  background: #f1f5f9 !important;
  color: #334155 !important;
  border-color: rgba(15, 23, 42, 0.15) !important;
}

:root.light-theme .config-swatch-pill.active,
body.light-theme .config-swatch-pill.active,
:root.light-theme .material-chip.active,
body.light-theme .material-chip.active {
  background: #d97706 !important;
  color: #ffffff !important;
  border-color: #d97706 !important;
}

:root.light-theme .chatbot-panel,
body.light-theme .chatbot-panel {
  background: #ffffff !important;
  border-color: rgba(15, 23, 42, 0.18) !important;
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.18) !important;
}

:root.light-theme .chat-msg.bot,
body.light-theme .chat-msg.bot {
  background: #f1f5f9 !important;
  color: #0f172a !important;
}

:root.light-theme .chatbot-input-area,
body.light-theme .chatbot-input-area {
  background: #f8fafc !important;
  border-top-color: rgba(15, 23, 42, 0.1) !important;
}

:root.light-theme .chatbot-input-area input,
body.light-theme .chatbot-input-area input {
  background: #ffffff !important;
  color: #0f172a !important;
}

:root.light-theme .footer,
body.light-theme .footer {
  background: #e2e8f0 !important;
  border-top-color: rgba(15, 23, 42, 0.1) !important;
  color: #334155 !important;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--color-text-main);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background-color: var(--bg-dark);
  color: var(--color-text-main);
  position: relative;
  min-height: 100vh;
}

/* Dynamic background noise & radial metallic aura */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: 
    radial-gradient(circle at 20% 15%, rgba(56, 189, 248, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 80% 60%, rgba(243, 198, 35, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(121, 131, 148, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--color-text-main);
}

p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}



/* Container & Layout */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.section-padding {
  padding: 7rem 0;
  position: relative;
}

.text-center { text-align: center; }
.text-accent { color: var(--metal-gold); }
.text-cyan { color: var(--metal-cyan); }
.text-mono { font-family: var(--font-mono); }

/* Section Header Component */
.section-header {
  margin-bottom: 4rem;
  max-width: 760px;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header .tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--metal-gold);
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(243, 198, 35, 0.08);
  border: 1px solid var(--border-gold);
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

.section-header h2 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.section-header h2 span {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.15rem;
  line-height: 1.7;
}

/* ==========================================================================
   LIQUID GLASS & BRUSHED METAL CORE UTILITIES
   ========================================================================== */

.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  box-shadow: var(--shadow-glass);
  position: relative;
  overflow: hidden;
}

.glass-card {
  background: var(--gradient-glass-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  box-shadow: var(--shadow-glass);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

/* Cursor-following specular gleam inside cards */
.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle 350px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.08), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.glass-card:hover::before {
  opacity: 1;
}

.glass-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glass-bright);
  box-shadow: var(--shadow-glass-hover);
}

/* Metal Textures & Finishes */
.metal-chrome-text {
  background: var(--gradient-chrome);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metal-gold-text {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metal-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(121, 131, 148, 0.12);
  border: 1px solid var(--border-metal);
  color: var(--color-text-main);
  backdrop-filter: blur(12px);
}

.metal-badge.gold {
  background: rgba(243, 198, 35, 0.12);
  border-color: var(--border-gold);
  color: var(--metal-gold-bright);
}

.metal-badge.cyan {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--metal-cyan);
}

/* ==========================================================================
   BUTTONS & INTERACTIVE CONTROLS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 2rem;
  border-radius: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn-primary {
  background: var(--gradient-gold);
  color: #07080a;
  box-shadow: 0 4px 20px rgba(243, 198, 35, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary:hover::after {
  left: 120%;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 30px rgba(243, 198, 35, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-main);
  border: 1px solid var(--border-glass-bright);
  backdrop-filter: blur(16px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--metal-gold);
  color: var(--metal-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 15px rgba(243, 198, 35, 0.2);
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.82rem;
  border-radius: 8px;
}

/* ==========================================================================
   TOP LIVE METAL COMMODITIES & KANPUR TELEMETRY BAR
   ========================================================================== */

.market-telemetry-bar {
  background: rgba(7, 8, 10, 0.95);
  border-bottom: 1px solid var(--border-glass);
  height: var(--ticker-height);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  position: relative;
  z-index: 1001;
  display: flex;
  align-items: center;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

:root.light-theme .market-telemetry-bar {
  background: rgba(240, 242, 245, 0.95);
}

.ticker-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  gap: 1.5rem;
}

.ticker-track {
  display: flex;
  align-items: center;
  gap: 2rem;
  overflow-x: auto;
  scrollbar-width: none;
  white-space: nowrap;
}

.ticker-track::-webkit-scrollbar { display: none; }

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.ticker-badge {
  color: var(--color-text-main);
  font-weight: 600;
}

.ticker-val {
  color: var(--metal-cyan);
  font-weight: 700;
}

.ticker-change.up { color: var(--metal-emerald); }
.ticker-change.down { color: #f87171; }

.telemetry-kanpur {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--metal-emerald);
  box-shadow: 0 0 8px var(--metal-emerald);
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.2); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.currency-select-wrapper {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.currency-select {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.currency-select:focus {
  border-color: var(--metal-gold);
}

/* ==========================================================================
   NAVIGATION HEADER
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(7, 8, 10, 0.65);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  z-index: 1000;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
}

:root.light-theme .header {
  background: rgba(255, 255, 255, 0.75);
}

.header.scrolled {
  background: rgba(7, 8, 10, 0.92);
  height: 74px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-bottom-color: var(--border-glass-bright);
}

:root.light-theme .header.scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: var(--gradient-titanium);
  border: 1px solid var(--border-glass-bright);
  box-shadow: var(--shadow-glass), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform var(--transition-normal);
}

.logo-icon::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--metal-gold);
  border-radius: 4px;
  transform: rotate(45deg);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover .logo-icon::before {
  transform: rotate(135deg);
  border-color: #ffffff;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--color-text-main);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text span {
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  color: var(--metal-gold);
  font-weight: 700;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
}

:root.light-theme .nav-menu {
  background: rgba(0, 0, 0, 0.03);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 1.15rem;
  border-radius: 999px;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.07);
}

.nav-link.active {
  color: #07080a;
  background: var(--gradient-gold);
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(243, 198, 35, 0.3);
}

/* Nav Controls */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.theme-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-glass-bright);
  color: var(--metal-gold);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  cursor: pointer;
  z-index: 1010;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text-main);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   HERO SECTION & 3D INTERACTIVE CANVAS VISUALIZER
   ========================================================================== */

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height) - var(--ticker-height));
  display: flex;
  align-items: center;
  padding: 4rem 0 6rem;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(140%) contrast(110%);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 65% 50%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
    linear-gradient(to right, var(--bg-dark) 40%, rgba(7, 8, 10, 0.7) 100%),
    linear-gradient(to top, var(--bg-dark) 0%, transparent 50%);
}

:root.light-theme .hero-overlay {
  background: 
    linear-gradient(to right, var(--bg-dark) 45%, rgba(240, 242, 245, 0.8) 100%),
    linear-gradient(to top, var(--bg-dark) 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3.5rem;
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 680px;
}

.hero-content h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.6rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 1.25rem 0 1.5rem;
}

.hero-content h1 span {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-pillars {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--metal-titanium-light);
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-pillars span {
  color: var(--metal-gold);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

/* 3D Interactive Canvas Visualizer Card */
.metal-visualizer-card {
  position: relative;
  width: 100%;
  height: 480px;
  background: rgba(16, 19, 24, 0.75);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  box-shadow: var(--shadow-glass), var(--shadow-gold-glow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.visualizer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.visualizer-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text-main);
  font-weight: 600;
}

.visualizer-canvas-container {
  flex: 1;
  position: relative;
  cursor: grab;
}

.visualizer-canvas-container:active {
  cursor: grabbing;
}

#metalCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.visualizer-controls {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-glass);
  background: rgba(7, 8, 10, 0.85);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.material-swatches {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.material-chip {
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--border-glass);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.material-chip.active {
  color: #07080a;
  background: var(--metal-gold);
  border-color: var(--metal-gold-bright);
  font-weight: 700;
}

.visualizer-hint {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-dim);
}

/* Badges Grid under Hero */
.hero-badges-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
  position: relative;
  z-index: 2;
}

.hero-badge-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  box-shadow: var(--shadow-glass);
  transition: all var(--transition-normal);
}

.hero-badge-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-gold);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(243, 198, 35, 0.15);
}

.badge-icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  background: rgba(243, 198, 35, 0.1);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--metal-gold);
  flex-shrink: 0;
}

.badge-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.badge-info p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   INTERACTIVE METALLURGY ESTIMATOR / SPECIFICATION CALCULATOR
   ========================================================================== */

.estimator-section {
  position: relative;
  overflow: hidden;
}

.estimator-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  padding: 3rem;
  box-shadow: var(--shadow-glass);
}

.estimator-form {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.form-val-badge {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--metal-gold);
}

.alloy-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.alloy-pill {
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.alloy-pill.active {
  border-color: var(--metal-gold);
  background: rgba(243, 198, 35, 0.12);
  box-shadow: 0 0 15px rgba(243, 198, 35, 0.15);
}

.alloy-name {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  display: block;
}

.alloy-grade {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-dim);
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--metal-gold);
  box-shadow: 0 0 10px rgba(243, 198, 35, 0.8);
  border: 2px solid #ffffff;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Estimator Live Output Display Card */
.estimator-results {
  background: rgba(7, 8, 10, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-glass);
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.result-metric {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  padding: 1rem;
  border-radius: 10px;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.metric-value.highlight {
  color: var(--metal-gold-bright);
}

.cost-summary-box {
  background: rgba(243, 198, 35, 0.06);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.cost-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--metal-gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.cost-amount {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-text-main);
}

/* ==========================================================================
   METRICS & STATS SECTION
   ========================================================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-card {
  padding: 2.5rem 2rem;
  text-align: center;
  border-radius: 16px;
  background: var(--gradient-glass-card);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-glass);
  position: relative;
  overflow: hidden;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 4vw, 3.6rem);
  font-weight: 800;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 0.75rem;
}

.stat-label {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

.stat-desc {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

/* ==========================================================================
   PRODUCTS & SOLUTIONS SHOWCASE
   ========================================================================== */

.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-main);
  border-color: var(--border-glass-bright);
}

.filter-tab.active {
  background: var(--gradient-gold);
  color: #07080a;
  border-color: var(--metal-gold-bright);
  box-shadow: 0 4px 15px rgba(243, 198, 35, 0.3);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 2.5rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-img-wrapper {
  position: relative;
  height: 280px;
  overflow: hidden;
  border-radius: 16px 16px 0 0;
  background: #0d0f12;
}

.product-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover .product-img-wrapper img {
  transform: scale(1.06);
}

.product-category-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
}

.product-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.product-tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--metal-gold);
  margin-bottom: 1rem;
}

.product-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Material Switcher Swatches inside Product Card */
.product-finish-selector {
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-glass);
}

.finish-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.finish-swatches {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.finish-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border-glass);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.finish-swatch:hover {
  transform: scale(1.15);
}

.finish-swatch.active {
  border-color: #ffffff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.finish-swatch.titanium { background: linear-gradient(135deg, #475569, #1e293b); }
.finish-swatch.gold { background: linear-gradient(135deg, #ffd447, #c89d14); }
.finish-swatch.chrome { background: linear-gradient(135deg, #ffffff, #94a3b8); }
.finish-swatch.obsidian { background: linear-gradient(135deg, #1e1e1e, #050505); }

.product-specs-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.product-spec-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
  padding-bottom: 0.35rem;
}

.spec-name { color: var(--color-text-dim); }
.spec-val { color: var(--color-text-main); font-weight: 600; }

/* ==========================================================================
   PORTFOLIO & INTERACTIVE CAD BLUEPRINT INSPECTOR
   ========================================================================== */

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  border-radius: 16px;
  overflow: hidden;
  position: relative;
  height: 380px;
  cursor: pointer;
}

.portfolio-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s ease;
}

.portfolio-blueprint-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(14, 30, 60, 0.88);
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.15) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
}

.portfolio-card.show-blueprint .portfolio-blueprint-overlay {
  opacity: 1;
}

.portfolio-card.show-blueprint img {
  filter: contrast(130%) brightness(50%) hue-rotate(180deg);
}

.portfolio-info-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 2rem;
  background: linear-gradient(to top, rgba(7, 8, 10, 0.95) 0%, rgba(7, 8, 10, 0.6) 60%, transparent 100%);
  z-index: 2;
  transition: transform var(--transition-normal);
}

.portfolio-card:hover img {
  transform: scale(1.05);
}

.portfolio-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.portfolio-location {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--metal-cyan);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* CAD Blueprint Toggle Pill */
.blueprint-toggle-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 3;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(7, 8, 10, 0.75);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.blueprint-toggle-btn:hover {
  border-color: var(--metal-cyan);
  color: var(--metal-cyan);
  box-shadow: var(--shadow-cyan-glow);
}

/* ==========================================================================
   GLOBAL OPERATIONS & LIVE TIMEZONE DASHBOARD
   ========================================================================== */

.world-clocks-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.clock-card {
  padding: 1.5rem;
  border-radius: 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-glass);
}

.clock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.clock-city {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.clock-time {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--metal-gold);
  margin-bottom: 0.35rem;
}

.clock-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* ==========================================================================
   CONTACT, CONSULTATION & RFQ FORM
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3.5rem;
}

.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-info-block {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem;
  border-radius: 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(243, 198, 35, 0.1);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--metal-gold);
  flex-shrink: 0;
}

.quote-form-container {
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  padding: 3rem;
  box-shadow: var(--shadow-glass);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.quote-form input,
.quote-form select,
.quote-form textarea {
  width: 100%;
  padding: 0.95rem 1.25rem;
  border-radius: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.quote-form input:focus,
.quote-form select:focus,
.quote-form textarea:focus {
  border-color: var(--metal-gold);
  box-shadow: 0 0 15px rgba(243, 198, 35, 0.2);
}

.file-dropzone {
  border: 2px dashed var(--border-glass);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.02);
}

.file-dropzone:hover {
  border-color: var(--metal-gold);
  background: rgba(243, 198, 35, 0.04);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background: #040507;
  border-top: 1px solid var(--border-glass);
  padding: 6rem 0 2rem;
  position: relative;
  z-index: 2;
}

:root.light-theme .footer {
  background: #e2e8f0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 3.5rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--metal-gold);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
}

/* ==========================================================================
   ENHANCED FLOATING AI ASSISTANT WIDGET
   ========================================================================== */

.chatbot-widget {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 10000;
}

.chatbot-bubble {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--gradient-titanium);
  border: 1px solid var(--border-glass-bright);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 25px rgba(243, 198, 35, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--metal-gold);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
}

.chatbot-bubble:hover {
  transform: scale(1.08) rotate(5deg);
  box-shadow: 0 15px 40px rgba(243, 198, 35, 0.4);
}

.chatbot-bubble svg {
  width: 26px;
  height: 26px;
}

.chatbot-panel {
  position: absolute;
  bottom: 74px;
  right: 0;
  width: 390px;
  height: 540px;
  background: rgba(11, 13, 17, 0.94);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: scale(0.9) translateY(20px);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.chatbot-panel.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.chatbot-header {
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chatbot-header-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.chatbot-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient-titanium);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--metal-gold);
}

.chatbot-avatar svg {
  width: 20px;
  height: 20px;
}

.chatbot-title h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.chatbot-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--metal-emerald);
}

.chatbot-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--metal-emerald);
}

.chatbot-close {
  cursor: pointer;
  color: var(--color-text-dim);
  font-size: 1.1rem;
  transition: color 0.2s;
}

.chatbot-close:hover {
  color: #ffffff;
}

.chatbot-messages {
  flex: 1;
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-msg {
  padding: 0.85rem 1.1rem;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.5;
  max-width: 88%;
}

.chat-msg.bot {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}

.chat-msg.user {
  background: var(--gradient-gold);
  color: #07080a;
  font-weight: 600;
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

.chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.chat-chip {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chat-chip:hover {
  background: var(--metal-gold);
  color: #07080a;
  border-color: var(--metal-gold-bright);
}

.chatbot-input-area {
  padding: 1rem 1.25rem;
  background: rgba(7, 8, 10, 0.8);
  border-top: 1px solid var(--border-glass);
  display: flex;
  gap: 0.6rem;
}

.chatbot-input-area input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--color-text-main);
}

.chatbot-input-area input:focus {
  border-color: var(--metal-gold);
}

.chatbot-send {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--gradient-gold);
  color: #07080a;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

/* ==========================================================================
   MODAL DIALOGS
   ========================================================================== */

.spec-modal, .success-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(7, 8, 10, 0.85);
  backdrop-filter: blur(20px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  padding: 1.5rem;
}

.spec-modal.active, .success-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 600px;
  background: var(--bg-glass-heavy);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  padding: 2.5rem;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.spec-modal.active .modal-card,
.success-modal.active .modal-card {
  transform: translateY(0);
}

/* Page Hero for Catalog, Portfolio, About, Contact */
.page-hero {
  padding: 6rem 0 4rem;
  position: relative;
  background: 
    radial-gradient(circle at 70% 30%, rgba(243, 198, 35, 0.05) 0%, transparent 50%),
    linear-gradient(to bottom, var(--bg-surface) 0%, var(--bg-dark) 100%);
  border-bottom: 1px solid var(--border-glass);
}

.page-hero h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 800;
  margin: 1rem 0;
}

.page-hero h1 span {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-hero p {
  font-size: 1.15rem;
  max-width: 720px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLETS & PHONES)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .metal-visualizer-card {
    height: 400px;
  }

  .estimator-container {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

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

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

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

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

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

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

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: rgba(11, 13, 17, 0.98);
    backdrop-filter: blur(30px);
    border-left: 1px solid var(--border-glass);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    gap: 1.25rem;
    border-radius: 0;
    transition: right var(--transition-normal);
    z-index: 1005;
  }

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

  .nav-toggle {
    display: flex;
  }

  .ticker-inner {
    padding: 0 1rem;
  }

  .telemetry-kanpur {
    display: none;
  }

  .hero-content h1 {
    font-size: 2.3rem;
  }

  .hero-badges-wrapper {
    grid-template-columns: 1fr;
  }

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

  .world-clocks-grid {
    grid-template-columns: 1fr;
  }

  .alloy-pills {
    grid-template-columns: 1fr;
  }

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

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

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

  .chatbot-panel {
    width: calc(100vw - 2rem);
    right: -1rem;
  }
}

/* ==========================================================================
   METAMORPHIC FOUNDRY (V2) — AVANT-GARDE 3D, SHADERS & MICRO-INTERACTIONS
   ========================================================================== */

/* 1. Global WebGL & Sparks Canvas Overlays */
#webglBgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  opacity: 0.65;
  transition: opacity 0.5s ease;
}

#sparkCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 999;
  pointer-events: none;
}

/* 2. Liquid Mercury Magnetic Cursor */
.bux-cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 8px;
  height: 8px;
  background: #ffffff;
  border-radius: 50%;
  pointer-events: none;
  z-index: 99999;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.9), 0 0 24px rgba(56, 189, 248, 0.8);
  transition: width 0.18s ease, height 0.18s ease, background 0.18s ease;
}

.bux-cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  width: 38px;
  height: 38px;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99998;
  transform: translate(-50%, -50%);
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1), height 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, background 0.25s ease;
  backdrop-filter: invert(0.12);
}

.bux-cursor-ring.active-hover {
  width: 60px;
  height: 60px;
  border-color: var(--metal-gold);
  background: rgba(243, 198, 35, 0.09);
}

.bux-cursor-ring.magnetic-snap {
  border-radius: 4px;
  border-color: var(--metal-cyan);
  background: rgba(56, 189, 248, 0.12);
}

.bux-cursor-hud {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 99997;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--metal-cyan);
  background: rgba(7, 8, 10, 0.88);
  border: 1px solid rgba(56, 189, 248, 0.5);
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
  transform: translate(22px, 22px);
  display: none;
  letter-spacing: 0.06em;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}

/* 3. Header Utility Controls: Audio & X-Ray Toggles */
.nav-utility-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass-bright);
  border-radius: 100px;
  color: var(--color-text-main);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-utility-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--metal-gold);
  color: var(--metal-gold-bright);
  transform: translateY(-1px);
}

.nav-utility-btn.active {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--metal-cyan);
  color: var(--metal-cyan);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.35);
}

.audio-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 12px;
}

.audio-bars span {
  width: 2px;
  height: 3px;
  background: currentColor;
  border-radius: 1px;
  transition: height 0.15s ease;
}

.nav-utility-btn.audio-on .audio-bars span:nth-child(1) { animation: soundBarWave 0.65s infinite alternate ease-in-out; }
.nav-utility-btn.audio-on .audio-bars span:nth-child(2) { animation: soundBarWave 0.45s infinite alternate ease-in-out 0.2s; }
.nav-utility-btn.audio-on .audio-bars span:nth-child(3) { animation: soundBarWave 0.55s infinite alternate ease-in-out 0.1s; }

@keyframes soundBarWave {
  0% { height: 3px; }
  100% { height: 12px; }
}

/* 4. X-Ray Blueprint Mode (Inspection View) */
body.xray-active {
  background-color: #020712 !important;
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.12) 1px, transparent 1px) !important;
  background-size: 32px 32px !important;
}

body.xray-active #webglBgCanvas {
  filter: hue-rotate(180deg) saturate(200%);
  opacity: 0.85;
}

body.xray-active .glass-card,
body.xray-active .product-card,
body.xray-active .project-card,
body.xray-active .estimator-card,
body.xray-active .hero-3d-card,
body.xray-active .service-card,
body.xray-active .stat-card,
body.xray-active .configurator-card,
body.xray-active .facade-studio-card {
  background: rgba(3, 14, 30, 0.88) !important;
  border: 1px solid rgba(56, 189, 248, 0.75) !important;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.22), inset 0 0 15px rgba(56, 189, 248, 0.12) !important;
  position: relative;
}

body.xray-active .glass-card::before,
body.xray-active .product-card::before,
body.xray-active .project-card::before {
  content: 'CAD: RIGID_TOL_±0.02mm [CNC_ACTIVE]';
  position: absolute;
  top: 6px;
  right: 10px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--metal-cyan);
  letter-spacing: 0.08em;
  z-index: 10;
  pointer-events: none;
}

/* 5. 3D Vanguard Hydro-System Configurator Styles */
.configurator-section {
  padding: 6rem 0;
  position: relative;
}

.configurator-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.config-preview-card {
  background: var(--bg-glass-heavy);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-glass);
}

.config-canvas-wrapper {
  position: relative;
  width: 100%;
  height: 480px;
  background: radial-gradient(circle at center, #131720 0%, #080a0e 100%);
}

#jacuzziCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.config-hud-overlay {
  position: absolute;
  bottom: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(7, 8, 10, 0.78);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.config-hud-overlay strong {
  color: var(--color-text-main);
}

.config-controls-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-glass);
}

.config-control-group {
  margin-bottom: 1.75rem;
}

.config-control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.config-swatch-pills {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.config-swatch-pill {
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--color-text-main);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.config-swatch-pill:hover {
  border-color: var(--border-glass-bright);
  background: rgba(255, 255, 255, 0.08);
}

.config-swatch-pill.active {
  background: rgba(243, 198, 35, 0.12);
  border-color: var(--metal-gold);
  color: var(--metal-gold-bright);
  box-shadow: 0 0 15px rgba(243, 198, 35, 0.2);
}

.chroma-color-picker-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chroma-color-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 44px;
  height: 44px;
  background: none;
  border: 2px solid var(--border-glass-bright);
  border-radius: 50%;
  cursor: pointer;
  overflow: hidden;
}

.chroma-color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.chroma-color-input::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
}

.chroma-quick-presets {
  display: flex;
  gap: 0.5rem;
}

.chroma-preset-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: transform 0.2s ease;
}

.chroma-preset-btn:hover {
  transform: scale(1.18);
}

/* 6. Parametric Facade Studio Styles */
.facade-studio-section {
  padding: 6rem 0;
  position: relative;
}

.facade-studio-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.facade-canvas-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-glass);
}

#facadeCanvas {
  width: 100%;
  height: 480px;
  display: block;
}

.facade-controls-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-glass);
}

.facade-slider-row {
  margin-bottom: 1.5rem;
}

.facade-slider-header {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.facade-slider-header strong {
  color: var(--metal-cyan);
}

/* 7. Scrollytelling: "The Journey of an Atom" Styles */
.scrolly-journey-section {
  padding: 6rem 0;
  position: relative;
}

.scrolly-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.scrolly-visual-sticky {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  background: radial-gradient(circle at center, #151a24 0%, #07090d 100%);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-glass);
  height: 520px;
}

#journeyCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.scrolly-dimension-overlay {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: rgba(7, 8, 10, 0.82);
  border: 1px solid rgba(56, 189, 248, 0.4);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--metal-cyan);
}

.scrolly-steps-container {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  padding-bottom: 4rem;
}

.scrolly-step-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 2.25rem;
  backdrop-filter: blur(20px);
  transition: all 0.4s ease;
  position: relative;
}

.scrolly-step-card.active-step {
  border-color: var(--metal-gold);
  box-shadow: 0 0 35px rgba(243, 198, 35, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateX(10px);
}

.scrolly-step-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--metal-gold-bright);
  margin-bottom: 0.75rem;
  letter-spacing: 0.06em;
}

.scrolly-step-card h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-text-main);
  margin-bottom: 0.75rem;
}

.scrolly-step-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.scrolly-spec-callouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.35);
  padding: 0.85rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-callout-item span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-dim);
}

.spec-callout-item strong {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-main);
}

/* 8. Live Metal Market Historical Canvas Chart Styles */
.market-chart-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass-bright);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-glass);
  margin-top: 3rem;
}

.market-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.market-chart-title h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--color-text-main);
}

.market-chart-title p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.chart-metal-pills {
  display: flex;
  gap: 0.5rem;
}

.chart-metal-pill {
  padding: 0.4rem 0.85rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chart-metal-pill.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--metal-cyan);
  color: var(--metal-cyan);
}

.chart-canvas-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
}

#marketTrendCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* 9. Expanded Kanpur Factory IoT Telemetry Card */
.kanpur-iot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.iot-data-card {
  background: rgba(16, 19, 24, 0.85);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.iot-data-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--metal-cyan);
}

.iot-card-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.iot-card-value {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.25rem;
}

.iot-card-subtext {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* 10. Kinetic Typography Sheen Sweep */
.kinetic-sheen-sweep {
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.kinetic-sheen-sweep::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-25deg);
  transition: none;
}

.kinetic-sheen-sweep:hover::after {
  left: 150%;
  transition: left 0.75s ease-in-out;
}

/* ==========================================================================
   RESPONSIVE — TABLET (max 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  .container { padding: 0 1.5rem; }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-pillars { justify-content: center; }
  .metal-visualizer-card { height: 380px; margin-top: 2rem; }

  .hero-badges-wrapper { grid-template-columns: repeat(2, 1fr); gap: 1rem; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }

  .estimator-container {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }

  .configurator-grid,
  .facade-studio-grid,
  .scrolly-layout {
    grid-template-columns: 1fr;
  }
  .scrolly-visual-sticky {
    position: relative;
    top: 0;
    margin-bottom: 2rem;
  }
}

/* ==========================================================================
   RESPONSIVE — MOBILE APP (max 768px)
   Full app-style redesign with bottom tab bar navigation
   ========================================================================== */
@media (max-width: 768px) {

  /* ---- Base & Body ---- */
  html { font-size: 15px; }
  body {
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
    -webkit-tap-highlight-color: transparent;
  }
  .section-padding { padding: 3.5rem 0; }
  .container { padding: 0 1rem; }

  /* ---- Hide custom cursor on touch ---- */
  .bux-cursor-dot,
  .bux-cursor-ring,
  .bux-cursor-hud { display: none !important; }

  /* ---- Ticker bar: compact ---- */
  .market-telemetry-bar {
    height: auto;
    min-height: 36px;
    padding: 0.4rem 0;
  }
  .ticker-inner {
    padding: 0 0.75rem;
    gap: 0.75rem;
  }
  .telemetry-kanpur { display: none; }
  .currency-select-wrapper span { display: none; }

  /* ---- Header: compact app header ---- */
  .header {
    height: 60px;
    --header-height: 60px;
  }
  .header.scrolled { height: 56px; }
  .logo-text { font-size: 1.05rem; }
  .logo-icon { width: 32px; height: 32px; }

  /* Hide desktop nav, show mobile bottom bar */
  .nav-menu { display: none !important; }
  .mobile-app-bar { display: flex !important; }

  /* Compact nav utility buttons */
  .nav-cta { gap: 0.3rem; }
  .nav-utility-btn {
    padding: 0.4rem 0.55rem;
    font-size: 0;  /* hide text labels */
    letter-spacing: 0;
    min-width: 36px;
  }
  .nav-utility-btn .audio-bars { margin: 0; }
  /* Keep [X] label visible as icon character */
  .nav-cta .btn-sm { display: none; }
  .theme-btn { width: 36px; height: 36px; border-radius: 8px; }

  /* ---- Section Headers ---- */
  .section-header { margin-bottom: 2rem; }
  .section-header h2 { font-size: clamp(1.75rem, 7vw, 2.4rem); }
  .section-header p { font-size: 0.95rem; }
  .section-header .tagline { font-size: 0.7rem; }

  /* ---- Hero ---- */
  .hero {
    min-height: calc(100svh - 60px - var(--ticker-height));
    padding: 2.5rem 0 3rem;
    align-items: flex-start;
  }
  .hero-content h1 {
    font-size: clamp(2.2rem, 9.5vw, 3.2rem);
    margin: 1rem 0 1.25rem;
  }
  .hero-desc { font-size: 0.95rem; margin-bottom: 1.75rem; }
  .hero-actions {
    flex-direction: column;
    gap: 0.75rem;
    align-items: stretch;
  }
  .hero-actions .btn { text-align: center; width: 100%; padding: 1rem; }
  .hero-badges-wrapper {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 2.5rem;
  }
  .hero-badge-card { padding: 1rem; gap: 0.85rem; }
  .badge-icon { width: 38px; height: 38px; }
  .badge-info h4 { font-size: 0.88rem; }
  .badge-info p { font-size: 0.75rem; }

  /* Hide hero 3D visualizer on mobile to reduce load */
  .metal-visualizer-card { display: none; }

  /* ---- Stats ---- */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .stat-card { padding: 1.5rem 1rem; }
  .stat-number { font-size: 2rem; }
  .stat-label { font-size: 0.9rem; }

  /* ---- Filter Tabs: horizontal scroll strip ---- */
  .filter-tabs {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    gap: 0.5rem;
    justify-content: flex-start;
    padding-bottom: 0.75rem;
    margin-bottom: 2rem;
    padding-left: 0;
  }
  .filter-tabs::-webkit-scrollbar { display: none; }
  .filter-tab {
    flex-shrink: 0;
    padding: 0.55rem 1.1rem;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  /* ---- Products Grid: single column ---- */
  .products-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .product-img-wrapper { height: 220px; }
  .product-body { padding: 1.25rem; }
  .product-title { font-size: 1.2rem; }

  /* ---- Portfolio Grid: single column ---- */
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .portfolio-card { height: 280px; }

  /* ---- Estimator ---- */
  .estimator-container {
    grid-template-columns: 1fr;
    padding: 1.25rem;
    gap: 1.5rem;
  }
  .alloy-pills { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .alloy-pill { padding: 0.6rem 0.5rem; }
  .results-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .result-metric { padding: 0.75rem; }
  .metric-value { font-size: 1rem; }
  .cost-amount { font-size: 1.6rem; }

  /* ---- Contact Form ---- */
  .contact-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .quote-form-container { padding: 1.25rem; }
  .form-row { grid-template-columns: 1fr; gap: 1rem; }

  /* ---- World Clocks ---- */
  .world-clocks-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .clock-card { padding: 1rem; }
  .clock-time { font-size: 1.3rem; }

  /* ---- Canvas heights ---- */
  .config-canvas-wrapper { height: 280px; }
  #facadeCanvas { height: 280px; }
  .market-chart-card { padding: 1rem; }
  .chart-canvas-wrapper { height: 180px; }

  /* ---- Facade Studio ---- */
  .facade-studio-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .facade-controls-card { padding: 1.25rem; }

  /* ---- Scrollytelling ---- */
  .scrolly-layout { grid-template-columns: 1fr; gap: 1.5rem; }
  .scrolly-step-card { padding: 1.25rem; }
  .scrolly-spec-callouts { grid-template-columns: 1fr 1fr; }

  /* ---- IoT Grid ---- */
  .kanpur-iot-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .iot-data-card { padding: 0.85rem; }
  .iot-card-value { font-size: 1.1rem; }

  /* ---- Chart Pills: wrap ---- */
  .chart-metal-pills { flex-wrap: wrap; gap: 0.4rem; }
  .market-chart-header { flex-direction: column; align-items: flex-start; }

  /* ---- Footer: single col ---- */
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    font-size: 0.8rem;
  }

  /* ---- Buttons: full width on mobile ---- */
  .btn { min-height: 48px; }

  /* ---- Toast: centered at bottom above tab bar ---- */
  .bux-toast {
    bottom: calc(85px + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    max-width: calc(100vw - 2rem);
    width: auto;
  }

  /* ---- Chatbot: move above tab bar ---- */
  .chatbot-widget {
    bottom: calc(82px + env(safe-area-inset-bottom));
    right: 1rem;
  }

  /* ---- Spec Modal ---- */
  .spec-modal-box,
  .success-modal-box {
    margin: 1rem;
    max-height: calc(100svh - 2rem);
    overflow-y: auto;
  }

  /* ---- Glass card hover: disable lift on touch ---- */
  .glass-card:hover { transform: none; }
  .hero-badge-card:hover { transform: none; }
  .product-card:hover .product-img-wrapper img { transform: none; }

  /* ---- XRay overlay: full screen ---- */
  #xrayOverlay {
    font-size: 0.7rem;
    padding: 1rem;
  }
}

/* ==========================================================================
   RESPONSIVE — SMALL MOBILE (max 480px)
   ========================================================================== */
@media (max-width: 480px) {
  html { font-size: 14px; }

  .hero-content h1 { font-size: clamp(1.9rem, 10vw, 2.6rem); }

  .hero-badges-wrapper { grid-template-columns: 1fr 1fr; }

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

  .world-clocks-grid { grid-template-columns: 1fr 1fr; }

  .kanpur-iot-grid { grid-template-columns: 1fr 1fr; }

  .alloy-pills { grid-template-columns: 1fr 1fr; }

  .section-header h2 { font-size: clamp(1.6rem, 8vw, 2rem); }

  .portfolio-card { height: 240px; }
}

/* ==========================================================================
   MOBILE APP BOTTOM TAB BAR
   ========================================================================== */
.mobile-app-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(7, 8, 10, 0.92);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 10000;
  justify-content: space-around;
  align-items: flex-end;
  padding: 0.4rem 0 env(safe-area-inset-bottom);
  gap: 0;
}

:root.light-theme .mobile-app-bar {
  background: rgba(255, 255, 255, 0.94);
  border-top-color: rgba(0, 0, 0, 0.12);
}

.mobile-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.25rem 0.3rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  gap: 0.28rem;
  text-decoration: none;
  flex: 1;
  position: relative;
  transition: color var(--transition-fast);
}

.mobile-tab svg {
  width: 23px;
  height: 23px;
  stroke: currentColor;
  stroke-width: 1.6;
  fill: none;
  transition: transform var(--transition-fast), stroke var(--transition-fast);
}

.mobile-tab::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  border-radius: 0 0 3px 3px;
  background: var(--metal-cyan);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.mobile-tab.active {
  color: var(--metal-cyan);
}

.mobile-tab.active svg {
  stroke: var(--metal-cyan);
  stroke-width: 2;
  transform: translateY(-1px);
}

.mobile-tab.active::after {
  opacity: 1;
}

/* Contact tab gets gold accent */
.mobile-tab:last-child.active {
  color: var(--metal-gold);
}
.mobile-tab:last-child.active svg { stroke: var(--metal-gold); }
.mobile-tab:last-child.active::after { background: var(--metal-gold); }

/* Light theme tab bar */
:root.light-theme .mobile-tab { color: var(--color-text-dim); }
:root.light-theme .mobile-tab.active { color: #0369a1; }
:root.light-theme .mobile-tab.active svg { stroke: #0369a1; }
:root.light-theme .mobile-tab.active::after { background: #0369a1; }

/* ==========================================================================
   MOBILE HAMBURGER MENU BUTTON
   ========================================================================== */
.mob-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}
.mob-menu-btn svg { width: 20px; height: 20px; }
.mob-menu-btn:hover { background: rgba(255,255,255,0.12); border-color: var(--metal-gold); }

@media (max-width: 768px) {
  .mob-menu-btn { display: flex; }
  /* Hide old nav-toggle if still present */
  .nav-toggle { display: none !important; }
}

/* ==========================================================================
   MOBILE DRAWER SLIDE-IN PANEL
   ========================================================================== */
.mob-drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  z-index: 19998;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.mob-drawer-overlay.open { display: block; opacity: 1; }

.mob-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(340px, 88vw);
  height: 100%;
  height: 100dvh;
  background: rgba(10, 12, 17, 0.97);
  backdrop-filter: blur(32px) saturate(200%);
  border-left: 1px solid rgba(255,255,255,0.1);
  z-index: 19999;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.mob-drawer.open { transform: translateX(0); }

:root.light-theme .mob-drawer {
  background: rgba(255,255,255,0.97);
  border-left-color: rgba(0,0,0,0.1);
}

/* Drawer Header */
.mob-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.mob-drawer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.mob-drawer-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.mob-drawer-close svg { width: 18px; height: 18px; }
.mob-drawer-close:hover { background: rgba(239,68,68,0.15); border-color: #ef4444; color: #ef4444; }

/* Section Labels */
.mob-drawer-section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  padding: 0 1.25rem;
  margin-bottom: 0.5rem;
}

/* Nav Links */
.mob-drawer-nav {
  padding: 1.25rem 0 0.5rem;
  flex-shrink: 0;
}
.mob-drawer-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}
.mob-drawer-link:hover {
  background: rgba(255,255,255,0.04);
  color: var(--color-text-main);
}
.mob-drawer-link.active {
  color: var(--metal-cyan);
  background: rgba(56,189,248,0.07);
}
.mob-drawer-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--metal-cyan);
}
.mob-drawer-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mob-drawer-link.active .mob-drawer-icon {
  background: rgba(56,189,248,0.1);
  border-color: rgba(56,189,248,0.25);
}
.mob-drawer-icon svg { width: 16px; height: 16px; }
.mob-drawer-label {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
}
.mob-drawer-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: rgba(56,189,248,0.12);
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--metal-cyan);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.mob-drawer-arrow { width: 16px; height: 16px; opacity: 0.3; flex-shrink: 0; }
.mob-drawer-link:hover .mob-drawer-arrow { opacity: 0.7; }

/* Tools Grid */
.mob-drawer-tools {
  padding: 1.25rem 0 0.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.mob-drawer-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  padding: 0 1.25rem;
  margin-top: 0.5rem;
}
.mob-drawer-tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 0.5rem;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.04em;
}
.mob-drawer-tool-btn svg { width: 20px; height: 20px; }
.mob-drawer-tool-btn .audio-bars { height: 20px; display: flex; align-items: flex-end; gap: 2px; }
.mob-drawer-tool-btn .audio-bars span { width: 4px; border-radius: 2px; background: currentColor; }
.mob-drawer-tool-btn .audio-bars span:nth-child(1) { height: 55%; }
.mob-drawer-tool-btn .audio-bars span:nth-child(2) { height: 100%; }
.mob-drawer-tool-btn .audio-bars span:nth-child(3) { height: 70%; }
.mob-drawer-tool-btn:hover {
  background: rgba(56,189,248,0.08);
  border-color: rgba(56,189,248,0.2);
  color: var(--metal-cyan);
}
.mob-drawer-tool-btn.active, .mob-drawer-tool-btn.audio-on {
  background: rgba(56,189,248,0.1);
  border-color: rgba(56,189,248,0.3);
  color: var(--metal-cyan);
}

/* Currency inside tools grid */
.mob-drawer-currency {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 0.5rem;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  grid-column: span 2;
}
.mob-drawer-currency svg { width: 18px; height: 18px; color: var(--metal-gold); }
.mob-currency {
  background: transparent;
  border: none;
  color: var(--color-text-main);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  width: 100%;
}
.mob-currency option { background: #0b0d11; }

/* Drawer Footer */
.mob-drawer-footer {
  padding: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: auto;
  flex-shrink: 0;
}
.mob-drawer-contact {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.mob-drawer-contact a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.mob-drawer-contact a:hover { color: var(--metal-gold); }

/* prefers-reduced-motion accessibility */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  #webglBgCanvas,
  #sparkCanvas {
    display: none !important;
  }
}