/* ==========================================================================
   VANGUARD INFRASTRUCTURE & MEGAPROJECTS
   Theme: Deep Titanium Slate & Champagne Bronze
   Engineered for Multi-Viewport Precision (1440px down to 320px)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Brand Color Palette */
  --color-slate-darkest: #070A0E;
  --color-slate-bg: #0B0F14;
  --color-slate-surface: #10161F;
  --color-slate-card: rgba(16, 22, 31, 0.75);
  --color-slate-elevated: #151D28;
  
  /* Champagne Bronze Accents */
  --color-bronze: #C89D7C;
  --color-bronze-light: #E0B596;
  --color-bronze-hover: #E8C1A5;
  --color-bronze-glow: rgba(200, 157, 124, 0.35);
  --color-bronze-subtle: rgba(200, 157, 124, 0.12);
  
  /* Ice Blueprint Cyan Highlights */
  --color-cyan: #38BDF8;
  --color-cyan-glow: rgba(56, 189, 248, 0.25);
  --color-cyan-subtle: rgba(56, 189, 248, 0.08);

  /* Neutrals & Typography */
  --color-white: #FFFFFF;
  --color-text-main: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-text-dim: #64748B;
  --color-border: rgba(200, 157, 124, 0.18);
  --color-border-subtle: rgba(255, 255, 255, 0.08);

  /* Fonts */
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Syne', var(--font-sans);

  /* Radius & Shadows */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-card: 0 20px 45px rgba(0, 0, 0, 0.45);
  --shadow-bronze: 0 10px 30px rgba(200, 157, 124, 0.25);
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-slate-bg);
  color: var(--color-text-main);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, picture {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --------------------------------------------------------------------------
   3. Common Buttons & Utility Components
   -------------------------------------------------------------------------- */
.btn-bronze {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, var(--color-bronze-light) 0%, var(--color-bronze) 100%);
  color: var(--color-slate-darkest);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-bronze);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-bronze:hover {
  background: linear-gradient(135deg, var(--color-bronze-hover) 0%, var(--color-bronze-light) 100%);
  transform: translateY(-2px);
  box-shadow: 0 14px 35px rgba(200, 157, 124, 0.4);
}

.btn-ghost-cyan {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--color-cyan);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  backdrop-filter: blur(8px);
}

.btn-ghost-cyan:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--color-cyan);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Section Header Typography */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-bronze);
  text-transform: uppercase;
  margin-bottom: 0.85rem;
  padding: 0.35rem 0.9rem;
  background: var(--color-bronze-subtle);
  border: 1px solid rgba(200, 157, 124, 0.25);
  border-radius: var(--radius-full);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.8vw, 3rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
  word-break: break-word;
  overflow-wrap: break-word;
}

.section-subtext {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation (Stacked cleanly under demo bar)
   -------------------------------------------------------------------------- */
.vanguard-header {
  position: fixed;
  top: 46px; /* Exactly clears system demo preview bar */
  left: 0;
  width: 100%;
  z-index: 1020;
  background: rgba(11, 15, 20, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.vanguard-header.scrolled {
  background: rgba(7, 10, 14, 0.98);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  border-bottom-color: rgba(200, 157, 124, 0.3);
}

.header-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.logo-monogram {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.monogram-svg {
  width: 100%;
  height: 100%;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-white);
  line-height: 1.05;
  white-space: nowrap;
}

.brand-tagline {
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--color-bronze);
  text-transform: uppercase;
  white-space: nowrap;
}

/* Desktop Nav Links */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: var(--transition);
  position: relative;
  padding: 0.25rem 0;
  white-space: nowrap; /* PREVENTS ANY MULTI-LINE TEXT WRAPPING */
}

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

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

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

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

.hotline-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border-subtle);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap; /* PREVENTS PHONE NUMBER WRAPPING */
  flex-shrink: 0;
}

.hotline-badge i {
  color: var(--color-cyan);
}

.hotline-badge:hover {
  border-color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.1);
}

.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 32px;
  height: 22px;
  cursor: pointer;
  z-index: 1050;
}

.hamburger-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile Drawer */
.mobile-backdrop {
  position: fixed;
  top: 46px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1030;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 46px;
  right: 0;
  width: 88%;
  max-width: 350px;
  height: calc(100vh - 46px);
  height: calc(100dvh - 46px);
  background: rgba(10, 14, 20, 0.97);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border-left: 1px solid rgba(200, 157, 124, 0.25);
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.85);
  z-index: 1040;
  padding: 1.5rem 1.25rem 2rem 1.25rem;
  display: none;
  flex-direction: column;
  justify-content: flex-start;
  gap: 1.15rem;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  overflow-x: hidden;
}

.mobile-drawer.open {
  display: flex;
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.drawer-header .brand-title {
  font-size: 1.15rem;
}

.drawer-close-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.drawer-close-btn:hover {
  background: var(--color-bronze-subtle);
  border-color: var(--color-bronze);
  color: var(--color-white);
  transform: rotate(90deg);
}

/* CAD Navigation Status Badge inside Drawer */
.drawer-telemetry-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  width: 100%;
}

.telemetry-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  flex-shrink: 0;
}

/* Executive Dossier Navigation List */
.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-sm);
  background: rgba(16, 22, 31, 0.75);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-white);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.drawer-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.25s ease;
}

.drawer-link-idx {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-bronze);
  opacity: 0.85;
  min-width: 22px;
  flex-shrink: 0;
  line-height: 1;
}

.drawer-link-content {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex-grow: 1;
  min-width: 0;
}

.drawer-link-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-link-sub {
  font-size: 0.7rem;
  color: var(--color-text-dim);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-link i {
  color: var(--color-text-dim);
  font-size: 0.75rem;
  transition: transform 0.25s ease, color 0.25s ease;
  flex-shrink: 0;
}

.drawer-link:hover {
  background: linear-gradient(135deg, rgba(200, 157, 124, 0.12) 0%, rgba(20, 28, 40, 0.9) 100%);
  border-color: var(--color-bronze);
  transform: translateX(4px);
}

.drawer-link:hover::before {
  background: var(--color-bronze);
}

.drawer-link:hover i {
  color: var(--color-bronze);
  transform: translateX(3px);
}

/* Quick Tender Desk Footer */
.drawer-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.drawer-contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-card-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
  text-transform: uppercase;
}

.drawer-cta-group {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.btn-whatsapp-drawer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  background: linear-gradient(135deg, #25D366 0%, #1EBE5D 100%);
  color: #FFFFFF;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.86rem;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.25);
  transition: all 0.25s ease;
}

.btn-whatsapp-drawer:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn-call-drawer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  color: var(--color-white);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.86rem;
  text-decoration: none;
  transition: all 0.25s ease;
}

.btn-call-drawer:hover {
  background: var(--color-bronze-subtle);
  border-color: var(--color-bronze);
}

.drawer-micro-meta {
  font-size: 0.64rem;
  color: var(--color-text-dim);
  text-align: center;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* Smooth Scroll Offsets for Fixed Header */
section[id] {
  scroll-margin-top: 110px;
}

/* --------------------------------------------------------------------------
   5. Hero Section & Interactive Dual Split Viewer
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: calc(100vh - 46px);
  padding: 8.5rem 0 5rem 0;
  background-image: 
    linear-gradient(180deg, rgba(11, 15, 20, 0.75) 0%, rgba(11, 15, 20, 0.92) 80%, var(--color-slate-bg) 100%),
    url('../img/hero-skyline.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: scroll;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 75% 35%, rgba(56, 189, 248, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 25% 65%, rgba(200, 157, 124, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.hero-container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

/* Top CAD Coordinates Ribbon */
.cad-coords-ribbon {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.cad-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  background: rgba(16, 22, 31, 0.7);
  border: 1px solid var(--color-border-subtle);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
}

.cad-badge i {
  color: var(--color-bronze);
}

.cad-badge-highlight {
  color: var(--color-cyan);
  border-color: rgba(56, 189, 248, 0.35);
  background: rgba(56, 189, 248, 0.1);
}

.cad-badge-highlight i {
  color: var(--color-cyan);
}

/* Hero Grid Layout */
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

/* Left Hero Typography */
.hero-content {
  min-width: 0;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-bronze);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.eyebrow-line {
  width: 32px;
  height: 2px;
  background: var(--color-bronze);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5.2vw, 4.8rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.highlight-bronze {
  background: linear-gradient(135deg, var(--color-bronze-light) 0%, var(--color-bronze) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: 2.25rem;
}

.hero-btn-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 3.25rem;
  flex-wrap: wrap;
}

/* Stats Ribbon */
.hero-stats-ribbon {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: rgba(16, 22, 31, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 0.5rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  min-width: 0;
  max-width: 100%;
}

.stat-box {
  display: flex;
  flex-direction: column;
  padding: 0 1.25rem;
  border-right: 1px solid var(--color-border-subtle);
  min-width: 0;
}

.stat-box:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  white-space: nowrap;
}

.stat-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
  line-height: 1.35;
}

/* Right: Dual Split Viewer Card */
.hero-viewer-card {
  background: var(--color-slate-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card), 0 0 35px rgba(200, 157, 124, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.viewer-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-bronze);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(0, 0, 0, 0.4);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
}

.viewer-mode-btn {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  color: var(--color-text-dim);
  cursor: pointer;
  transition: var(--transition);
}

.viewer-mode-btn.active,
.viewer-mode-btn:hover {
  background: var(--color-bronze);
  color: var(--color-slate-darkest);
}

/* Split Viewport Canvas */
.split-viewport {
  position: relative;
  width: 100%;
  height: 480px;
  border-radius: var(--radius-md);
  overflow: hidden;
  user-select: none;
  border: 1px solid var(--color-border-subtle);
  cursor: ew-resize;
}

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

.split-img-base {
  position: absolute;
  inset: 0;
}

.split-overlay-container {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 50%; /* Default split */
  overflow: hidden;
  border-right: 2px solid var(--color-cyan);
  transition: width 0.05s ease-out;
}

.split-img-wire {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  min-width: 100%;
  object-fit: cover;
}

.wireframe-cad-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(8, 16, 30, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--color-cyan);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  backdrop-filter: blur(8px);
}

/* Split Divider Handle */
.split-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 32px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 20;
}

.handle-line {
  flex-grow: 1;
  width: 2px;
  background: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan);
}

.handle-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-slate-darkest);
  border: 2px solid var(--color-cyan);
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.6);
}

/* HUD Badge */
.viewer-hud-badge {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(11, 15, 20, 0.85);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-white);
  pointer-events: none;
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.hud-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-bronze);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

.viewer-footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
  padding: 0 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* --------------------------------------------------------------------------
   6. Engineering Disciplines (Horizontal Expanding Architectural Bands)
   -------------------------------------------------------------------------- */
.disciplines-section {
  padding: 6.5rem 0;
  background: var(--color-slate-bg);
  position: relative;
}

.disciplines-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
}

.discipline-band {
  position: relative;
  min-height: 280px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-slate-surface);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.discipline-band:hover {
  border-color: var(--color-bronze);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), 0 0 30px rgba(200, 157, 124, 0.18);
  transform: translateY(-4px);
}

.band-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.38;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.discipline-band:hover .band-bg {
  transform: scale(1.06);
  opacity: 0.6;
}

.band-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 10, 14, 0.25) 0%, rgba(11, 15, 20, 0.75) 45%, rgba(7, 10, 14, 0.95) 100%);
}

.band-content {
  position: relative;
  z-index: 10;
  padding: 2rem 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.band-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.band-number {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-bronze);
  opacity: 0.85;
  line-height: 1;
}

.band-explore-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  color: var(--color-bronze);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: var(--transition);
}

.discipline-band:hover .band-explore-btn {
  background: var(--color-bronze);
  color: var(--color-slate-darkest);
  transform: translateX(4px);
  box-shadow: 0 0 15px rgba(200, 157, 124, 0.4);
}

.band-info {
  min-width: 0;
}

.band-title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}

.band-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.band-specs {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.spec-pill {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* --------------------------------------------------------------------------
   7. Flagship Landmark Project Showcase
   -------------------------------------------------------------------------- */
.flagship-section {
  padding: 6.5rem 0;
  background: var(--color-slate-darkest);
  position: relative;
}

/* Interactive Landmark Project Switcher Tabs */
.landmark-tabs-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.landmark-tab-btn {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  background: rgba(16, 22, 31, 0.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.35rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.landmark-tab-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.3s ease;
}

.landmark-tab-btn:hover {
  background: rgba(22, 31, 44, 0.9);
  border-color: rgba(200, 157, 124, 0.5);
  transform: translateY(-2px);
}

.landmark-tab-btn.active {
  background: linear-gradient(135deg, rgba(200, 157, 124, 0.14) 0%, rgba(16, 22, 31, 0.92) 100%);
  border-color: var(--color-bronze);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(200, 157, 124, 0.15);
}

.landmark-tab-btn.active::before {
  background: var(--color-bronze);
  box-shadow: 0 0 10px var(--color-bronze);
}

.tab-idx {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-dim);
  opacity: 0.65;
  transition: all 0.3s ease;
  line-height: 1;
}

.landmark-tab-btn.active .tab-idx {
  color: var(--color-bronze);
  opacity: 1;
  text-shadow: 0 0 12px rgba(200, 157, 124, 0.6);
}

.tab-text-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.tab-label {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-metric {
  font-size: 0.76rem;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.landmark-tab-btn.active .tab-metric {
  color: var(--color-cyan);
}

/* Flagship Display Frame */
.flagship-display-card {
  position: relative;
  width: 100%;
  height: 640px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1.5px solid var(--color-border);
  box-shadow: var(--shadow-card), 0 25px 60px rgba(0, 0, 0, 0.7);
  background: var(--color-slate-darkest);
}

.flagship-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.4s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.flagship-hero-img.fading {
  opacity: 0.2;
  transform: scale(1.02);
}

/* Interactive CAD Hotspots Overlay */
.hotspot-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 15;
}

.cad-hotspot {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  cursor: pointer;
  z-index: 25;
  outline: none;
  transition: transform 0.25s ease;
}

.cad-hotspot:hover,
.cad-hotspot:focus {
  transform: translate(-50%, -50%) scale(1.15);
}

.hotspot-pulse {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px solid var(--color-cyan);
  animation: cadHotspotPulse 2.4s infinite cubic-bezier(0.25, 1, 0.5, 1);
  pointer-events: none;
}

@keyframes cadHotspotPulse {
  0% {
    transform: scale(0.6);
    opacity: 0.95;
  }
  70% {
    transform: scale(1.6);
    opacity: 0;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

.hotspot-pin {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(11, 15, 20, 0.92);
  border: 2px solid var(--color-cyan);
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.6), inset 0 0 8px rgba(56, 189, 248, 0.3);
  transition: all 0.25s ease;
}

.cad-hotspot:hover .hotspot-pin,
.cad-hotspot:focus .hotspot-pin {
  background: var(--color-cyan);
  color: var(--color-slate-darkest);
  box-shadow: 0 0 25px var(--color-cyan);
}

.hotspot-tooltip {
  position: absolute;
  bottom: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: rgba(11, 15, 20, 0.96);
  border: 1px solid rgba(56, 189, 248, 0.45);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  min-width: 230px;
  max-width: 270px;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.75), 0 0 20px rgba(56, 189, 248, 0.2);
  z-index: 30;
  text-align: left;
}

.hotspot-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: rgba(56, 189, 248, 0.45) transparent transparent transparent;
}

.cad-hotspot:hover .hotspot-tooltip,
.cad-hotspot:focus .hotspot-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.tt-tag {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
}

.tt-title {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.25rem;
  line-height: 1.25;
}

.tt-desc {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* CAD Corner Brackets (Shared for Plaque & HUD) */
.plaque-corner,
.cad-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--color-bronze);
  border-style: solid;
  pointer-events: none;
  opacity: 0.75;
}

.plaque-tl, .cad-tl {
  top: 6px;
  left: 6px;
  border-width: 2px 0 0 2px;
}

.plaque-tr, .cad-tr {
  top: 6px;
  right: 6px;
  border-width: 2px 2px 0 0;
}

.plaque-bl, .cad-bl {
  bottom: 6px;
  left: 6px;
  border-width: 0 0 2px 2px;
}

.plaque-br, .cad-br {
  bottom: 6px;
  right: 6px;
  border-width: 0 2px 2px 0;
}

/* Bottom-Left Architectural Metadata Plaque */
.architectural-plaque {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  width: 360px;
  max-width: calc(100% - 4rem);
  background: rgba(11, 15, 20, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card), 0 0 35px rgba(0, 0, 0, 0.7);
  z-index: 20;
}

.plaque-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-bronze);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.plaque-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1.15rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.plaque-meta-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 0.95rem;
}

.plaque-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.plaque-label {
  font-size: 0.7rem;
  color: var(--color-text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.plaque-val {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.35;
}

/* Floating Engineering Specs HUD Overlay (Top-Right) */
.engineering-specs-hud {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 360px;
  max-width: calc(100% - 4rem);
  background: rgba(11, 15, 20, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card), 0 0 35px rgba(0, 0, 0, 0.7);
  z-index: 20;
}

.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 0.75rem;
}

.hud-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hud-status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 8px #22C55E;
}

.hud-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-white);
  text-transform: uppercase;
}

.hud-code {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-bronze);
  letter-spacing: 0.08em;
}

.hud-telemetry-stamp {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
}

.telemetry-live {
  color: var(--color-cyan);
  font-weight: 700;
}

.hud-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.hud-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hud-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.hud-row-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

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

.hud-value {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-white);
}

.hud-value-cyan {
  color: var(--color-cyan);
}

.hud-micro-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, rgba(200, 157, 124, 0.6) 0%, var(--color-bronze) 100%);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.bar-fill-cyan {
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.5) 0%, var(--color-cyan) 100%);
}

.hud-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.hud-timeline {
  font-size: 0.78rem;
  color: #22C55E;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.hud-action-btn {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-bronze);
  background: var(--color-bronze-subtle);
  border: 1px solid rgba(200, 157, 124, 0.3);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-decoration: none;
}

.hud-action-btn:hover {
  background: var(--color-bronze);
  color: var(--color-slate-darkest);
}

/* --------------------------------------------------------------------------
   8. Self-Owned Capex Heavy Machinery Fleet
   -------------------------------------------------------------------------- */
.machinery-section {
  padding: 6.5rem 0;
  background: var(--color-slate-bg);
  position: relative;
}

.machinery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
}

.machine-card {
  background: var(--color-slate-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.machine-card:hover {
  border-color: var(--color-bronze);
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 25px rgba(200, 157, 124, 0.1);
}

.blueprint-schematic-box {
  width: 100%;
  height: 110px;
  background: rgba(7, 10, 14, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 25px rgba(0, 0, 0, 0.65);
}

.schematic-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.machine-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.45rem;
}

.machine-cad-id {
  font-family: monospace;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-bronze);
  letter-spacing: 0.08em;
}

.machine-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-cyan);
  text-transform: uppercase;
}

.machine-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.65rem;
}

.machine-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.machine-spec-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border-subtle);
}

.machine-spec {
  display: flex;
  flex-direction: column;
}

.spec-title {
  font-size: 0.72rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.spec-data {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   9. Executive Estimation & Feasibility Terminal
   -------------------------------------------------------------------------- */
.feasibility-section {
  padding: 6.5rem 0;
  background: var(--color-slate-darkest);
  position: relative;
}

.terminal-cockpit {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  background: var(--color-slate-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-card), 0 0 45px rgba(200, 157, 124, 0.08);
}

.terminal-controls {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  min-width: 0;
  max-width: 100%;
}

.terminal-header-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-bronze);
  text-transform: uppercase;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

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

.control-label {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-white);
}

.control-hint {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--color-text-dim);
}

.terminal-select {
  background: rgba(7, 10, 14, 0.7);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-white);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  max-width: 100%;
  transition: var(--transition);
}

.terminal-select:focus {
  border-color: var(--color-bronze);
  box-shadow: 0 0 15px rgba(200, 157, 124, 0.2);
}

.terminal-select option {
  background: var(--color-slate-darkest);
  color: var(--color-text-main);
}

/* Slider Controls */
.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.slider-readout {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-sm);
}

.terminal-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
  accent-color: var(--color-bronze);
  margin-top: 0.5rem;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--color-text-dim);
  font-weight: 600;
}

/* Terminal Output HUD */
.terminal-output-hud {
  background: rgba(7, 10, 14, 0.85);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.75rem;
  backdrop-filter: blur(12px);
  min-width: 0;
  max-width: 100%;
}

.hud-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.hud-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #22C55E;
}

.blink-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22C55E;
  animation: pulse 1.5s infinite;
}

.computed-budget-box {
  background: linear-gradient(135deg, rgba(200, 157, 124, 0.12) 0%, rgba(16, 22, 31, 0.5) 100%);
  border: 1px solid rgba(200, 157, 124, 0.35);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  text-align: center;
  position: relative;
}

.budget-top-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  gap: 0.75rem;
}

.hud-complexity-meter {
  position: relative;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.meter-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.meter-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 3.5;
}

.meter-bar {
  fill: none;
  stroke: var(--color-cyan);
  stroke-width: 3.5;
  stroke-linecap: round;
  transition: stroke-dasharray 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.meter-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: monospace;
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--color-cyan);
}

.budget-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-bronze);
  text-transform: uppercase;
}

.budget-value {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.2vw, 3.4rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.05;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

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

/* Computed Metrics Grid */
.computed-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.c-metric-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.c-metric-icon {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.c-metric-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.c-label {
  font-size: 0.68rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.c-val {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-white);
  white-space: nowrap;
}

.hud-action-box {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-align: center;
}

.tender-notice {
  font-size: 0.72rem;
  color: var(--color-text-dim);
}

/* --------------------------------------------------------------------------
   10. Executive CTA Banner
   -------------------------------------------------------------------------- */
.executive-banner-section {
  padding: 4.5rem 0;
  background: var(--color-slate-bg);
}

.executive-banner-ribbon {
  background: linear-gradient(135deg, var(--color-bronze-light) 0%, var(--color-bronze) 60%, #B88A68 100%);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2.5rem;
  box-shadow: var(--shadow-card), 0 0 50px rgba(200, 157, 124, 0.35);
  color: var(--color-slate-darkest);
}

.ribbon-content {
  max-width: 650px;
}

.ribbon-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: rgba(7, 10, 14, 0.15);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

.ribbon-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.ribbon-sub {
  font-size: 1rem;
  font-weight: 500;
  opacity: 0.9;
  line-height: 1.6;
}

.ribbon-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.btn-dark-slate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: var(--color-slate-darkest);
  color: var(--color-white);
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-dark-slate:hover {
  background: #000000;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.btn-whatsapp-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: #25D366;
  color: #FFFFFF;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-whatsapp-solid:hover {
  background: #20BA5A;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4);
}

/* --------------------------------------------------------------------------
   11. Technical CAD Blueprint Footer
   -------------------------------------------------------------------------- */
.blueprint-footer {
  position: relative;
  background: var(--color-slate-darkest);
  border-top: 1px solid var(--color-border);
  padding: 5rem 0 2rem 0;
  overflow: hidden;
}

.footer-grid-bg {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.1fr 1.1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  position: relative;
  z-index: 10;
}

.footer-col-brand .brand-logo {
  margin-bottom: 1.25rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.cad-footer-coords {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

.cad-footer-coords span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.cad-footer-coords i {
  color: var(--color-bronze);
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-bronze);
  transform: translateX(4px);
}

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

.footer-badges-list li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-badges-list i {
  color: var(--color-cyan);
}

.footer-subtext {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.footer-action-pills {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-contact-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-subtle);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-white);
  transition: var(--transition);
}

.footer-contact-pill:hover {
  border-color: var(--color-bronze);
  background: var(--color-bronze-subtle);
}

.footer-pill-wa {
  color: #25D366;
  border-color: rgba(37, 211, 102, 0.3);
}

.footer-pill-wa:hover {
  background: rgba(37, 211, 102, 0.1);
  border-color: #25D366;
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.82rem;
  color: var(--color-text-dim);
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 10;
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-bottom-links a {
  transition: var(--transition);
}

.footer-bottom-links a:hover {
  color: var(--color-bronze);
}

.sep {
  color: rgba(255, 255, 255, 0.2);
}

/* --------------------------------------------------------------------------
   12. Mobile Sticky Action Dock (<768px)
   -------------------------------------------------------------------------- */
.mobile-sticky-dock {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(7, 10, 14, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.65rem 1rem;
  border-top: 1px solid var(--color-border);
  z-index: 999;
}

.mobile-dock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.mobile-dock-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.dock-call {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-white);
}

.dock-whatsapp {
  background: #25D366;
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   13. Responsive Breakpoints & Strict Overflow Guards
   -------------------------------------------------------------------------- */
@media (max-width: 1280px) {
  .header-container {
    padding: 0.75rem 1.25rem;
    gap: 1rem;
  }

  .nav-desktop {
    gap: 1.15rem;
  }

  .nav-link {
    font-size: 0.86rem;
  }

  .hotline-badge {
    font-size: 0.8rem;
    padding: 0.45rem 0.75rem;
  }

  .btn-bronze {
    padding: 0.65rem 1.25rem;
    font-size: 0.86rem;
  }
}

@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .terminal-cockpit {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 2.25rem;
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem;
  }
}

@media (max-width: 1240px) {
  .hotline-badge {
    display: none;
  }

  .nav-desktop {
    gap: 1.25rem;
  }
}

@media (max-width: 1024px) {
  .nav-desktop,
  .hotline-badge {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .disciplines-stack {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .band-content {
    padding: 1.75rem 1.5rem;
  }

  .machinery-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .vanguard-header .header-actions .btn-bronze {
    display: none; /* Hide header CTA button on mobile to guarantee zero navbar overflow */
  }

  .mobile-sticky-dock {
    display: block;
  }

  body {
    padding-bottom: 60px; /* Space for mobile sticky action dock */
  }

  .hero-section {
    padding: 7rem 0 4rem 0;
  }

  .hero-stats-ribbon {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 0;
    padding: 1.25rem 0.5rem;
  }

  .stat-box {
    padding: 0.5rem 1rem;
  }

  .stat-box:nth-child(2) {
    border-right: none;
  }

  .discipline-band {
    min-height: auto;
  }

  .band-content {
    padding: 1.5rem 1.25rem;
    gap: 1rem;
  }

  /* Section 3 Flagship Landmark Responsive Rules */
  .landmark-tabs-nav {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    margin-bottom: 1.5rem;
  }

  .landmark-tab-btn {
    padding: 0.85rem 1rem;
    gap: 0.9rem;
  }

  .flagship-display-card {
    height: auto;
    min-height: auto;
    display: flex;
    flex-direction: column;
    position: relative;
  }

  .flagship-hero-img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    display: block;
    position: relative;
  }

  .hotspot-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 320px;
  }

  .cad-hotspot {
    width: 32px;
    height: 32px;
  }

  .hotspot-pin {
    width: 22px;
    height: 22px;
    font-size: 0.65rem;
  }

  .hotspot-tooltip {
    max-width: 200px;
    min-width: 160px;
    padding: 0.55rem 0.75rem;
    bottom: calc(100% + 8px);
  }

  .architectural-plaque {
    position: relative;
    bottom: auto;
    left: auto;
    width: 100%;
    max-width: 100%;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: 1.25rem;
    background: rgba(11, 15, 20, 0.94);
  }

  .engineering-specs-hud {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    max-width: 100%;
    margin-top: 0;
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border-left: none;
    border-right: none;
    border-bottom: none;
    padding: 1.25rem;
    background: rgba(11, 15, 20, 0.98);
  }

  .computed-metrics-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .executive-banner-ribbon {
    flex-direction: column;
    padding: 2.25rem 1.5rem;
    text-align: center;
  }

  .ribbon-actions {
    width: 100%;
    justify-content: center;
  }

  .footer-top-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }

  .brand-title {
    font-size: 1.15rem;
  }

  .brand-tagline {
    font-size: 0.55rem;
  }

  .logo-monogram {
    width: 32px;
    height: 32px;
  }

  .hero-title {
    font-size: clamp(1.75rem, 6.5vw, 2.2rem);
    word-break: break-word;
    overflow-wrap: break-word;
  }

  .section-heading {
    font-size: 1.6rem;
  }

  .split-viewport {
    height: 360px;
  }

  .machine-spec-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
  }

  .terminal-cockpit {
    padding: 1.5rem 1rem;
  }

  .terminal-output-hud {
    padding: 1.5rem 1rem;
  }

  .landmark-tab-btn {
    padding: 0.75rem 0.85rem;
    gap: 0.75rem;
  }

  .tab-idx {
    font-size: 1.15rem;
  }

  .tab-label {
    font-size: 0.88rem;
  }

  .tab-metric {
    font-size: 0.7rem;
  }

  .plaque-title {
    font-size: 1.2rem;
  }

  .hud-telemetry-stamp {
    font-size: 0.65rem;
    gap: 0.35rem;
  }

  .hud-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.65rem;
  }

  .hud-action-btn {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 360px) {
  .container {
    padding: 0 0.85rem;
  }

  .header-container {
    padding: 0.65rem 0.65rem;
    gap: 0.5rem;
  }

  .brand-title {
    font-size: 1rem;
  }

  .hero-title {
    font-size: 1.55rem;
  }

  .section-heading {
    font-size: 1.35rem;
  }

  .brand-tagline {
    display: none;
  }

  .hero-btn-group .btn-bronze,
  .hero-btn-group .btn-ghost-cyan {
    width: 100%;
  }

  .cad-coords-ribbon {
    gap: 0.5rem;
  }

  .cad-badge {
    font-size: 0.68rem;
    padding: 0.25rem 0.5rem;
  }
}

main {
  overflow-x: hidden;
  max-width: 100%;
}