/* ==========================================================================
   SKELETAL ENGINEERING — 2026 CORPORATE DESIGN SYSTEM
   Brand Accent: #FF9A32 | Dark Neutral Architecture
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;800&family=Manrope:wght@300;400;500;600;700;800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Brand Accents */
  --color-primary: #FF9A32;
  --color-primary-hover: #FFAA4D;
  --color-primary-dark: #E68520;
  --color-primary-glow: rgba(255, 154, 50, 0.22);
  --color-primary-subtle: rgba(255, 154, 50, 0.08);

  /* Light Mode Palette */
  --bg-main: #FFFFFF;
  --bg-secondary: #F6F7F8;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-dark-section: #111315;
  --text-dark-section: #F5F5F5;
  --text-primary: #171717;
  --text-secondary: #5F6368;
  --text-muted: #8E949B;
  --border-color: #E5E7EB;
  --border-subtle: #F0F2F5;
  --header-bg: rgba(255, 255, 255, 0.85);
  --header-border: rgba(229, 231, 235, 0.8);
  --badge-bg: #FFF4E8;
  --badge-text: #D97706;

  /* Elevations */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.09);
  --shadow-glow: 0 10px 30px rgba(255, 154, 50, 0.25);

  /* Layout & Geometry */
  --max-width: 1240px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --header-height: 80px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-main: #0B0D0F;
  --bg-secondary: #111417;
  --bg-card: #171A1D;
  --bg-card-hover: #1D2125;
  --bg-glass: rgba(17, 20, 23, 0.85);
  --bg-dark-section: #0B0D0F;
  --text-dark-section: #F5F5F5;
  --text-primary: #F5F5F5;
  --text-secondary: #A8ADB3;
  --text-muted: #6B7280;
  --border-color: #2A2E33;
  --border-subtle: #1E2227;
  --header-bg: rgba(11, 13, 15, 0.88);
  --header-border: rgba(42, 46, 51, 0.8);
  --badge-bg: rgba(255, 154, 50, 0.12);
  --badge-text: #FF9A32;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 10px 30px rgba(255, 154, 50, 0.3);
}

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

html {
  font-family: 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Scroll Progress Bar */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
  z-index: 1001;
  transition: width 0.08s ease-out;
  box-shadow: 0 0 10px var(--color-primary);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.18;
}

h3 {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 600;
  line-height: 1.3;
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.68;
}

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

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

/* Container & Sections */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding-top: clamp(4.5rem, 8vw, 6.5rem);
  padding-bottom: clamp(4.5rem, 8vw, 6.5rem);
  position: relative;
}

.section-bg-secondary {
  background-color: var(--bg-secondary);
}

.section-bg-dark {
  background-color: var(--bg-dark-section);
  color: #F5F5F5;
}

.section-bg-dark h2,
.section-bg-dark h3,
.section-bg-dark h4 {
  color: #FFFFFF;
}

.section-bg-dark p {
  color: #A8ADB3;
}

/* Engineering Blueprint Background Grid */
.bg-blueprint-grid {
  background-image: 
    linear-gradient(to right, rgba(255, 154, 50, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 154, 50, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Eyebrow Badges */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  background-color: var(--badge-bg);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 154, 50, 0.25);
  margin-bottom: 1rem;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary);
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-header.text-center {
  text-align: center;
}

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

.section-header p.subheading {
  max-width: 680px;
  margin-top: 1rem;
  font-size: 1.125rem;
}

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

/* Text Highlights */
.highlight-orange {
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease-smooth);
  position: relative;
  text-align: center;
  white-space: nowrap;
}

.btn svg {
  transition: transform 0.25s var(--ease-smooth);
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #111111;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(255, 154, 50, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 6px 20px rgba(255, 154, 50, 0.45);
  transform: translateY(-2px);
  color: #111111;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  transform: translateY(-2px);
}

.btn-outline-white {
  background-color: transparent;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: rgba(255, 154, 50, 0.1);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.6rem 1.15rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1.1rem 2.25rem;
  font-size: 1.05rem;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all 0.3s var(--ease-smooth);
  background-color: transparent;
}

.site-header.scrolled {
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--header-border);
  box-shadow: var(--shadow-sm);
  height: 72px;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo svg,
.brand-logo img {
  height: 48px;
  width: auto;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}

.site-header:not(.scrolled) .nav-link {
  color: #FFFFFF;
}

[data-theme="light"] .site-header.scrolled .nav-link {
  color: #171717;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary) !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.25s var(--ease-smooth);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Dark/Light Theme Toggle */
.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.site-header:not(.scrolled) .theme-toggle-btn {
  border-color: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

.theme-toggle-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: rotate(15deg);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.site-header:not(.scrolled) .mobile-menu-btn {
  color: #FFFFFF;
}

/* Mobile Nav Drawer */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1002;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 380px);
  height: 100vh;
  background-color: var(--bg-card);
  border-left: 1px solid var(--border-color);
  z-index: 1003;
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right 0.35s var(--ease-smooth);
  overflow-y: auto;
}

.mobile-nav-drawer.active {
  right: 0;
}

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

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.mobile-nav-links .nav-link {
  font-size: 1.2rem;
  font-weight: 600;
  display: block;
  padding: 0.75rem 0;
}

.mobile-nav-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 4rem;
  overflow: hidden;
  background-color: #0B0D0F;
  color: #FFFFFF;
}

.hero-bg-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.03);
  transition: transform 1.2s ease-out;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(11, 13, 15, 0.88) 0%,
    rgba(11, 13, 15, 0.75) 50%,
    rgba(11, 13, 15, 0.85) 100%
  );
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 840px;
}

.hero-title {
  color: #FFFFFF;
  margin-bottom: 1.5rem;
}

.hero-description {
  color: #D1D5DB;
  font-size: clamp(1.1rem, 1.8vw, 1.25rem);
  line-height: 1.65;
  margin-bottom: 2.5rem;
  max-width: 700px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.mouse-icon {
  width: 22px;
  height: 36px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.mouse-wheel {
  width: 4px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 1.8s infinite;
}

@keyframes scrollWheel {
  0% { transform: translate(-50%, 0); opacity: 1; }
  100% { transform: translate(-50%, 14px); opacity: 0; }
}

/* ==========================================================================
   STATISTICS BAR SECTION
   ========================================================================== */
.stats-section {
  position: relative;
  z-index: 4;
  margin-top: -3.5rem;
  padding: 0 1.5rem;
}

.stats-card-wrapper {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 2rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-item {
  text-align: center;
  position: relative;
  padding: 0 1rem;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: var(--border-color);
}

.stat-number {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(2.5rem, 4vw, 3.25rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4.5rem;
  align-items: center;
}

.about-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image-card img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.about-image-card:hover img {
  transform: scale(1.03);
}

.about-badge-floating {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  background: rgba(17, 19, 21, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 154, 50, 0.4);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}

.about-badge-floating .badge-val {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.about-badge-floating .badge-lbl {
  font-size: 0.8125rem;
  font-weight: 500;
  color: #D1D5DB;
  margin-top: 0.25rem;
}

.checklist {
  list-style: none;
  margin: 1.75rem 0 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  flex-shrink: 0;
}

/* ==========================================================================
   SERVICES SECTION
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.75rem;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  transition: all 0.3s var(--ease-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 154, 50, 0.4);
  box-shadow: var(--shadow-lg);
}

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

.service-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.service-card:hover .service-icon-box {
  background-color: var(--color-primary);
  color: #111111;
  transform: scale(1.06);
}

.service-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.service-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-primary);
  margin-top: auto;
}

.service-link svg {
  transition: transform 0.25s ease;
}

.service-card:hover .service-link svg {
  transform: translateX(5px);
}

/* ==========================================================================
   FEATURED SERVICE DEEP-DIVE
   ========================================================================== */
.featured-service-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.featured-service-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.featured-service-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.featured-service-visual img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}

.featured-pill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.5rem 0 2rem;
}

.pill-tag {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-primary);
}

/* ==========================================================================
   PROJECTS / PORTFOLIO SECTION
   ========================================================================== */
.project-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-primary);
  color: #111111;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(255, 154, 50, 0.25);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s var(--ease-smooth);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 154, 50, 0.4);
}

.project-thumb-container {
  position: relative;
  height: 260px;
  overflow: hidden;
}

.project-thumb-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-smooth);
}

.project-card:hover .project-thumb-container img {
  transform: scale(1.06);
}

.project-category-tag {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  background-color: var(--color-primary);
  color: #111111;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.project-body {
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-location {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.project-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  transition: color 0.2s ease;
}

.project-card:hover .project-title {
  color: var(--color-primary);
}

.project-excerpt {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.project-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ==========================================================================
   FEATURED PROJECT SHOWCASE (FULL-WIDTH)
   ========================================================================== */
.featured-project-banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.featured-project-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.featured-project-banner:hover .featured-project-bg {
  transform: scale(1.03);
}

.featured-project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to top,
    rgba(11, 13, 15, 0.95) 0%,
    rgba(11, 13, 15, 0.65) 60%,
    rgba(11, 13, 15, 0.2) 100%
  );
}

.featured-project-content {
  position: relative;
  z-index: 2;
  padding: 3.5rem 3rem;
  max-width: 750px;
  color: #FFFFFF;
}

.featured-project-content h3 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: #FFFFFF;
  margin: 0.5rem 0 1rem;
}

.featured-project-content p {
  color: #D1D5DB;
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
}

/* ==========================================================================
   INDUSTRIES WE SERVE
   ========================================================================== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.industry-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s var(--ease-smooth);
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.industry-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.industry-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.industry-card:hover .industry-icon {
  background-color: var(--color-primary);
  color: #111111;
}

.industry-title {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}

.industry-desc {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* ==========================================================================
   ENGINEERING PROCESS TIMELINE
   ========================================================================== */
.timeline-container {
  position: relative;
  margin-top: 3rem;
}

.timeline-track {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.5rem;
  position: relative;
}

.timeline-track::before {
  content: '';
  position: absolute;
  top: 35px;
  left: 5%;
  width: 90%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--border-color));
  z-index: 1;
}

.timeline-step {
  position: relative;
  z-index: 2;
  text-align: center;
}

.step-number-circle {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease-spring);
}

.timeline-step:hover .step-number-circle {
  background-color: var(--color-primary);
  color: #111111;
  transform: scale(1.12);
  box-shadow: var(--shadow-glow);
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ==========================================================================
   WHY CHOOSE SKELETAL ENGINEERING
   ========================================================================== */
.why-choose-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.why-feature-card {
  background-color: rgba(23, 26, 29, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(42, 46, 51, 0.8);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  transition: all 0.3s ease;
}

.why-feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.why-feature-title {
  font-size: 1.25rem;
  color: #FFFFFF;
  margin: 1.25rem 0 0.75rem;
}

.why-feature-card p {
  color: #A8ADB3;
  font-size: 0.95rem;
}

/* ==========================================================================
   TECHNICAL EXCELLENCE SECTION
   ========================================================================== */
.tech-spec-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.tech-spec-tabs {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tech-tab-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tech-tab-btn.active,
.tech-tab-btn:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-subtle);
}

.tech-tab-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tech-display-box {
  background-color: #0B0D0F;
  border: 1px solid rgba(255, 154, 50, 0.3);
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: #FFFFFF;
  box-shadow: var(--shadow-lg);
  font-family: 'JetBrains Mono', monospace;
  position: relative;
}

.tech-display-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 1.5rem;
}

.tech-code-line {
  font-size: 0.85rem;
  line-height: 1.8;
  color: #9CA3AF;
}

.tech-code-line .highlight {
  color: var(--color-primary);
  font-weight: 600;
}

/* ==========================================================================
   TESTIMONIALS & CLIENTS
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.rating-stars {
  color: var(--color-primary);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.quote-text {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  font-style: italic;
  margin-bottom: 2rem;
}

.client-author-box {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.client-avatar-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.client-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

.client-role {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.clients-logos-grid {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 2.5rem;
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
}

.partner-logo-item {
  font-family: 'Manrope', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.partner-logo-item:hover {
  filter: grayscale(0%);
  opacity: 1;
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   FINAL CTA & CONTACT SECTION
   ========================================================================== */
.final-cta-section {
  background: linear-gradient(135deg, #111315 0%, #171A1D 100%);
  border-radius: var(--radius-xl);
  padding: 4.5rem 3.5rem;
  text-align: center;
  color: #FFFFFF;
  margin-bottom: 5rem;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 154, 50, 0.3);
}

.final-cta-section h2 {
  color: #FFFFFF;
  max-width: 750px;
  margin: 0 auto 1.25rem;
}

.final-cta-section p {
  color: #D1D5DB;
  max-width: 620px;
  margin: 0 auto 2.5rem;
  font-size: 1.15rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-form-panel {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2.25rem;
  box-shadow: var(--shadow-md);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-control {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-main);
  color: var(--text-primary);
  transition: all 0.2s ease;
  outline: none;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

/* ==========================================================================
   MODALS & DETAIL VIEW POPUPS
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s var(--ease-smooth);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  transform: translateY(30px) scale(0.97);
  transition: transform 0.35s var(--ease-spring);
}

.modal-backdrop.active .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.modal-close-btn:hover {
  background-color: var(--color-primary);
  color: #111111;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--bg-dark-section);
  color: #F5F5F5;
  border-top: 3px solid var(--color-primary);
  padding: 5rem 0 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr 1.2fr;
  gap: 3.5rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-links a {
  color: #A8ADB3;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: #8E949B;
}

.footer-legal-links {
  display: flex;
  gap: 1.5rem;
}

.footer-legal-links a:hover {
  color: var(--color-primary);
}

/* Floating Back To Top */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #111111;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(255, 154, 50, 0.4);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all 0.3s var(--ease-spring);
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(255, 154, 50, 0.6);
}

/* ==========================================================================
   ANIMATION & INTERSECTION OBSERVER UTILITIES
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-smooth), transform 0.7s var(--ease-smooth);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background-color: #111315;
  color: #FFFFFF;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideInToast 0.3s var(--ease-spring);
}

@keyframes slideInToast {
  from { transform: translateX(-100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1199px) {
  .about-grid,
  .featured-service-grid,
  .tech-spec-container,
  .contact-grid {
    gap: 3rem;
  }
  .projects-grid,
  .testimonials-grid,
  .why-choose-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-track {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .timeline-track::before {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

@media (max-width: 991px) {
  .nav-desktop {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .about-grid,
  .featured-service-grid,
  .tech-spec-container,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .stats-card-wrapper {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
  .stats-card-wrapper {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    margin-top: -2rem;
  }
  .stat-item::after {
    display: none !important;
  }
  .projects-grid,
  .testimonials-grid,
  .why-choose-grid,
  .industries-grid {
    grid-template-columns: 1fr;
  }
  .timeline-track {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .final-cta-section {
    padding: 3rem 1.5rem;
  }
}

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