/* ==========================================================================
   VERTEX VDC - CALM LUXURY ARCHITECTURAL DESIGN SYSTEM
   Domain: vertexvdc.com | Precision BIM & VDC Solutions
   ========================================================================== */

:root {
  /* Obsidian & Titanium Calm Luxury Palette */
  --bg-deep: #070A12;
  --bg-primary: #0A0E18;
  --bg-secondary: #0E1525;
  --bg-surface: #141D32;
  --bg-card: rgba(16, 23, 40, 0.75);
  --bg-card-hover: rgba(22, 33, 56, 0.88);
  --bg-card-solid: #111829;
  --bg-glass: rgba(9, 13, 22, 0.80);

  /* Brand Accents from New Logo (Cobalt Blue & Metallic Slate/Silver) */
  --accent-terracotta: #3872E0;
  --accent-terracotta-hover: #4B83EE;
  --accent-terracotta-glow: rgba(40, 85, 167, 0.42);
  --accent-steel: #6D8093;
  --accent-cyan: #9CA6AD;
  --accent-cyan-glow: rgba(156, 166, 173, 0.24);
  --steel-border: rgba(109, 128, 147, 0.28);

  /* Refined Typography Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #9CA6AD;
  --text-muted: #6D8093;
  --text-subtle: #4C6171;

  /* Borders & Dividers */
  --border-subtle: rgba(156, 166, 173, 0.10);
  --border-focus: rgba(56, 114, 224, 0.45);
  --border-terracotta: rgba(56, 114, 224, 0.38);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Geometry & Layout */
  --max-width: 1280px;
  --header-height: 80px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Shadows & Depth */
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-elevated: 0 12px 36px rgba(0, 0, 0, 0.55);
  --shadow-luxury: 0 20px 50px rgba(0, 0, 0, 0.7);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle Architectural Grid Texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -2;
}

/* Atmospheric Ambient Glows */
body::after {
  content: "";
  position: fixed;
  top: -150px;
  right: -150px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(56, 114, 224, 0.08) 0%, rgba(156, 166, 173, 0.04) 45%, transparent 70%);
  pointer-events: none;
  z-index: -1;
  filter: blur(100px);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
}

p {
  color: var(--text-secondary);
}

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

.mono {
  font-family: var(--font-mono);
}

/* Calm Luxury Accent Text */
.text-terracotta {
  color: var(--accent-terracotta);
}

.text-cyan {
  color: var(--accent-cyan);
}

.text-gradient {
  background: linear-gradient(135deg, #FFFFFF 30%, #E2E8F0 60%, var(--accent-terracotta) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Section Header Badges */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.section-tag.tag-terracotta {
  border-color: rgba(56, 114, 224, 0.32);
  color: var(--accent-terracotta);
  background: rgba(40, 85, 167, 0.12);
}

.section-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.section-title {
  font-size: clamp(2.2rem, 3.8vw, 3rem);
  font-weight: 800;
  margin-bottom: 18px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 52px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #2855A7 0%, #3872E0 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 20px var(--accent-terracotta-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3164BF 0%, #4B83EE 100%);
  box-shadow: 0 6px 28px rgba(56, 114, 224, 0.48);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* ==========================================================================
   NAVIGATION HEADER
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background: rgba(7, 9, 14, 0.94);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #FFFFFF;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-terracotta);
  transition: width var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-contact-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-contact-link:hover {
  color: var(--accent-cyan);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding-top: calc(var(--header-height) + 50px);
  padding-bottom: 90px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 52px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 10;
}

.hero-badge-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.6rem, 4.4vw, 3.8rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

/* Hero Metrics Strip */
.hero-metrics-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.hero-metric-item .metric-val {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #FFFFFF;
  line-height: 1.1;
  display: flex;
  align-items: baseline;
}

.hero-metric-item .metric-val span {
  color: var(--accent-terracotta);
}

.hero-metric-item .metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Hero BIM Viewport HUD */
.hero-visual-wrapper {
  position: relative;
}

.hero-viewport-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-luxury);
  backdrop-filter: blur(16px);
}

.viewport-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(10, 13, 20, 0.88);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.viewport-dots {
  display: flex;
  gap: 6px;
}

.viewport-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.viewport-feed {
  position: relative;
  width: 100%;
  height: 450px;
  overflow: hidden;
}

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

.hero-viewport-card:hover .viewport-img {
  transform: scale(1.02);
}

.viewport-grid-overlay {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(rgba(156, 166, 173, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156, 166, 173, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* Viewport Trade Layers Bar */
.viewport-layers-bar {
  display: flex;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(10, 13, 20, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}

.viewport-layers-bar::-webkit-scrollbar {
  display: none;
}

.layer-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.layer-pill:hover {
  color: #FFF;
  border-color: rgba(255, 255, 255, 0.2);
}

.layer-pill.active {
  background: rgba(40, 85, 167, 0.25);
  border-color: var(--accent-terracotta);
  color: #FFFFFF;
  font-weight: 600;
}

/* Interactive Hotspots */
.bim-hotspot {
  position: absolute;
  cursor: pointer;
  z-index: 15;
}

.hotspot-point {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-terracotta);
  box-shadow: 0 0 0 4px rgba(56, 114, 224, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse-hotspot 2.2s infinite;
  transition: transform var(--transition-fast);
}

.hotspot-point::after {
  content: "";
  width: 6px;
  height: 6px;
  background: #FFF;
  border-radius: 50%;
}

.hotspot-tooltip {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: rgba(10, 13, 20, 0.94);
  border: 1px solid var(--accent-terracotta);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: #FFF;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-fast);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
}

.bim-hotspot:hover .hotspot-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.bim-hotspot:hover .hotspot-point {
  transform: scale(1.2);
}

.hotspot-1 { top: 38%; left: 45%; }
.hotspot-2 { top: 60%; left: 32%; }
.hotspot-3 { top: 22%; left: 70%; }

.viewport-hud {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(7, 9, 14, 0.88);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  backdrop-filter: blur(10px);
}

.hud-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.hud-status-live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 10px #10B981;
}

/* ==========================================================================
   PARTNERS & ENDORSEMENTS
   ========================================================================== */
.partners-section {
  padding: 44px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(15, 20, 32, 0.4);
}

.partners-title {
  text-align: center;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 36px;
  opacity: 0.8;
}

.partner-logo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: #94A3B8;
  transition: var(--transition-fast);
}

.partner-logo-item:hover {
  color: #FFFFFF;
  opacity: 1;
}

/* ==========================================================================
   ABOUT US SECTION
   ========================================================================== */
.about-section {
  padding: 110px 0;
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-luxury);
}

.about-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.about-floating-card {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: rgba(14, 19, 31, 0.95);
  border: 1px solid var(--accent-terracotta);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(14px);
  max-width: 300px;
}

.card-stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-terracotta);
  line-height: 1;
  margin-bottom: 8px;
}

.card-stat-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 36px;
}

.about-feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition-fast);
}

.about-feature-box:hover {
  border-color: rgba(156, 166, 173, 0.32);
  transform: translateY(-2px);
}

.about-feature-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-xs);
  background: rgba(156, 166, 173, 0.10);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.about-feature-box:nth-child(2) .about-feature-icon,
.about-feature-box:nth-child(4) .about-feature-icon {
  background: rgba(40, 85, 167, 0.16);
  color: var(--accent-terracotta);
}

.about-feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-feature-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   CORE SERVICES GRID (4 CORE SERVICES)
   ========================================================================== */
.services-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-secondary) 100%);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(156, 166, 173, 0.3);
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}

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

.service-card.card-terracotta::before {
  background: linear-gradient(90deg, transparent, var(--accent-terracotta), transparent);
}

.service-card.card-terracotta:hover {
  border-color: var(--border-terracotta);
}

.service-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.service-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(156, 166, 173, 0.10);
  border: 1px solid rgba(156, 166, 173, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.service-card.card-terracotta .service-icon-box {
  background: rgba(40, 85, 167, 0.16);
  border-color: rgba(56, 114, 224, 0.30);
  color: var(--accent-terracotta);
}

.service-lod-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.service-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.service-bullets {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.service-bullets li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-bullets li svg {
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.service-card.card-terracotta .service-bullets li svg {
  color: var(--accent-terracotta);
}

.service-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.service-software-stack {
  display: flex;
  gap: 8px;
}

.software-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
}

.service-expand-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.service-card.card-terracotta .service-expand-btn {
  color: var(--accent-terracotta);
}

.service-expand-btn:hover {
  text-decoration: underline;
}

/* ==========================================================================
   MODEL VS BUILT COMPARISON SLIDER
   ========================================================================== */
.comparison-section {
  padding: 100px 0;
  background: var(--bg-deep);
  position: relative;
}

.slider-container {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-luxury);
  border: 1px solid var(--border-subtle);
  user-select: none;
}

.slider-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.slider-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.slider-img.img-before {
  z-index: 1;
}

.slider-img-wrapper-after {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  overflow: hidden;
  z-index: 2;
  border-right: 2px solid var(--accent-terracotta);
}

.slider-img.img-after {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: var(--slider-width, 100%);
  max-width: none;
  object-fit: cover;
}

.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: var(--accent-terracotta);
  z-index: 10;
  cursor: ew-resize;
  transform: translateX(-50%);
}

.slider-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-terracotta);
  box-shadow: 0 0 20px var(--accent-terracotta-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  cursor: ew-resize;
}

.slider-badge {
  position: absolute;
  top: 20px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  backdrop-filter: blur(12px);
  z-index: 5;
}

.slider-badge-left {
  left: 20px;
  background: rgba(40, 85, 167, 0.92);
  color: #FFF;
}

.slider-badge-right {
  right: 20px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFF;
}

.comparison-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.comp-stat-val {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #FFF;
}

.comp-stat-val.terracotta { color: var(--accent-terracotta); }
.comp-stat-val.cyan { color: var(--accent-cyan); }

.comp-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* ==========================================================================
   FEATURED PROJECTS / PORTFOLIO
   ========================================================================== */
.projects-section {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.portfolio-filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFF;
}

.filter-btn.active {
  background: var(--accent-terracotta);
  border-color: var(--accent-terracotta);
  color: #FFF;
  box-shadow: 0 4px 16px var(--accent-terracotta-glow);
}

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: rgba(56, 114, 224, 0.35);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.project-thumb-box {
  position: relative;
  width: 100%;
  height: 230px;
  overflow: hidden;
}

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

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

.project-badge-top {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10, 13, 20, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  backdrop-filter: blur(10px);
}

.project-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.project-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
  line-height: 1.6;
}

.project-metrics-row {
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.project-footer-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

.project-inspect-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  transition: var(--transition-fast);
}

.project-inspect-btn:hover {
  color: #FFF;
  text-decoration: underline;
}

.project-card-sector-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.metric-pill strong {
  color: var(--accent-terracotta);
}

/* ==========================================================================
   WHY CHOOSE US / TECHNICAL ADVANTAGE
   ========================================================================== */
.why-section {
  padding: 100px 0;
  background: var(--bg-deep);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: var(--transition-fast);
}

.advantage-card:hover {
  border-color: rgba(56, 114, 224, 0.35);
  transform: translateY(-4px);
}

.adv-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: var(--accent-cyan);
}

.advantage-card:nth-child(2) .adv-icon,
.advantage-card:nth-child(4) .adv-icon {
  color: var(--accent-terracotta);
}

.adv-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.adv-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Comparison Matrix */
.matrix-container {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

/* ==========================================================================
   48-HOUR PILOT BENCHMARK & CAPABILITY STATEMENT BANNER
   ========================================================================== */
.pilot-benchmark-card {
  margin-top: 56px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 40px 44px;
  box-shadow: var(--shadow-luxury);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.pilot-benchmark-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-terracotta));
}

.pilot-benchmark-grid {
  display: grid;
  grid-template-columns: 1.55fr 0.65fr;
  gap: 40px;
  align-items: center;
}

.pilot-benchmark-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.matrix-table th, .matrix-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.matrix-table th {
  background: rgba(15, 20, 32, 0.85);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.matrix-table th.highlight-col {
  color: var(--accent-terracotta);
  background: rgba(40, 85, 167, 0.14);
  border-left: 1px solid var(--border-terracotta);
  border-right: 1px solid var(--border-terracotta);
}

.matrix-table td.highlight-col {
  background: rgba(40, 85, 167, 0.08);
  font-weight: 600;
  color: #FFF;
  border-left: 1px solid var(--border-terracotta);
  border-right: 1px solid var(--border-terracotta);
}

/* ==========================================================================
   TESTIMONIALS SECTION
   ========================================================================== */
.testimonials-section {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.test-stars {
  color: #F59E0B;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.test-quote {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 26px;
  font-style: italic;
}

.test-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #182235;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-cyan);
  border: 1px solid rgba(156, 166, 173, 0.3);
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFF;
}

.author-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   CONTACT / RFP SECTION
   ========================================================================== */
.contact-section {
  padding: 110px 0;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-deep) 100%);
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 36px 0;
}

.contact-method-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-xs);
  background: rgba(156, 166, 173, 0.10);
  border: 1px solid rgba(156, 166, 173, 0.24);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-method-item:nth-child(2) .contact-icon {
  background: rgba(40, 85, 167, 0.16);
  border-color: rgba(56, 114, 224, 0.30);
  color: var(--accent-terracotta);
}

.method-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.method-val {
  font-size: 1rem;
  font-weight: 600;
  color: #FFF;
  margin-top: 2px;
}

.contact-sla-badge {
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: #10B981;
}

/* Intake Form Card */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 44px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-luxury);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

/* Quick Scope Chips */
.scope-chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.scope-chip {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.scope-chip:hover {
  border-color: rgba(56, 114, 224, 0.4);
  color: #FFF;
}

.scope-chip.selected {
  background: rgba(40, 85, 167, 0.22);
  border-color: var(--accent-terracotta);
  color: #FFFFFF;
  font-weight: 600;
}

.file-remove-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.file-remove-btn:hover {
  color: #EF4444;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 13px 18px;
  background: rgba(7, 9, 14, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  color: #FFF;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-terracotta);
  box-shadow: 0 0 14px rgba(56, 114, 224, 0.22);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* File Upload Zone */
.file-dropzone {
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: var(--transition-fast);
}

.file-dropzone:hover, .file-dropzone.dragover {
  border-color: var(--accent-terracotta);
  background: rgba(40, 85, 167, 0.08);
}

.dropzone-icon {
  font-size: 1.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.dropzone-text {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.dropzone-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.file-list-preview {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-preview-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(40, 85, 167, 0.16);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-cyan);
}

.form-success-message {
  display: none;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid #10B981;
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
  margin-top: 24px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #040508;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 32px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand-desc {
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 320px;
  font-size: 0.88rem;
  line-height: 1.65;
}

.footer-heading {
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #FFF;
  margin-bottom: 20px;
}

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

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-certifications {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* ==========================================================================
   MODAL
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(14px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 44px;
  position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.9);
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal-backdrop.open .modal-dialog {
  transform: translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 22px;
  right: 22px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
}

.modal-close-btn:hover {
  color: #FFF;
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   ========================================================================== */
@media (max-width: 1100px) {
  .hero-grid, .about-grid, .contact-grid, .pilot-benchmark-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .about-floating-card {
    right: 20px;
    bottom: -20px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(7, 9, 14, 0.98);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    z-index: 999;
  }

  .nav-links.nav-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    display: flex;
  }

  .header-actions {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .services-grid, .portfolio-grid, .testimonials-grid, .advantages-grid {
    grid-template-columns: 1fr;
  }
  .services-grid .service-card:nth-child(n) {
    grid-column: span 1;
  }

  .pilot-benchmark-card {
    padding: 24px;
  }

  .form-row, .hero-metrics-strip, .comparison-stats-bar {
    grid-template-columns: 1fr;
  }

  .contact-form-card {
    padding: 24px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .hero-title {
    font-size: 2.3rem;
  }
}