:root {
  --color-primary: #000000;
  --color-primary-light: #1a1a1a;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-bg-light: #ffffff;
  --color-bg-white: #ffffff;
  --color-bg-gray: #f8f8f8;
  --color-accent: #b0b0b0;
  --color-divider: #eeeeee;
  
  --font-sans: 'Outfit', sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  
  --container-max-width: 1280px;
  --container-padding: 2.5rem;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg-light);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.custom-cursor::after {
  content: '';
  width: 4px;
  height: 4px;
  background-color: #fff;
  border-radius: 50%;
}

.custom-cursor.hover {
  width: 50px;
  height: 50px;
  border-color: var(--color-primary);
  background-color: rgba(0, 0, 0, 0.03);
}

/* Blueprint Graphic Accent */
.hero-blueprint {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('https://images.unsplash.com/photo-1503387762-592dea58dc27?q=80&w=2600&auto=format&fit=crop');
  background-size: cover;
  opacity: 0.05;
  filter: invert(1);
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 0;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

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

ul {
  list-style: none;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 10rem 0;
}

.section-dark {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

.section-dark h2, .section-dark h3, .section-dark p {
  color: var(--color-bg-white);
}

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

/* Typography Utilities */
.section-badge {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 2rem;
  font-weight: 500;
}

.section-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin-bottom: 3.5rem;
  font-weight: 300;
}

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

.accent-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 3rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all var(--transition-fast);
  cursor: pointer;
  border-radius: 0;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-primary);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

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

.btn-outline-light:hover {
  background-color: var(--color-bg-white);
  color: var(--color-primary);
  border-color: var(--color-bg-white);
}

.btn-text {
  padding: 0;
  background: none;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  font-weight: 500;
  padding-bottom: 0.3rem;
  letter-spacing: 0.05em;
}

.btn-text:hover {
  padding-right: 0.5rem;
  border-color: var(--color-accent);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 3rem 0; /* More air vertically */
  z-index: 1000;
  background-color: transparent;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
  height: 90px;
  padding: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-divider);
}

.navbar.scrolled .logo-img {
  filter: none; /* Revert to original black on light backgrounds */
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 100% !important; /* Force full width to create air */
  padding: 0 5rem !important; /* Increased breathing room */
}

.logo {
  display: flex;
  align-items: center;
  height: 100%;
}

.logo-img {
  height: 320px; /* Even more monumental presence un-shrinkable */
  width: auto;
  display: block;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  object-fit: contain;
  filter: brightness(0) invert(1); /* Pure White contrast on hero images */
  pointer-events: none; /* Prevent transparent bounding box from blocking clicks below menu */
}

.logo:hover .logo-img {
  opacity: 0.8;
  transform: scale(1.02);
}

.footer .logo-img {
  height: 140px; /* Balanced signature scale */
  filter: none; /* Keep original black for footer context */
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem; /* Compact group for better separation from logo */
}

.nav-links a {
  text-decoration: none;
  color: #ffffff; /* Initial state (over hero) visibility */
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #ffffff; /* Contrast with hero */
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffffff;
}

.nav-links a.active::after {
  width: 100%;
}

/* Color transition for contrast when scrolled on light backgrounds */
.scrolled .nav-links a {
  color: var(--color-primary);
}

.scrolled .nav-links a::after {
  background-color: var(--color-primary);
}

.scrolled .nav-links a:hover,
.scrolled .nav-links a.active {
  color: var(--color-primary);
}

/* Explicit class for light background pages where white navigation is invisible */
.navbar-dark-text .nav-links a {
  color: var(--color-primary);
}

.navbar-dark-text .nav-links a::after {
  background-color: var(--color-primary);
}

.navbar-dark-text .logo-img {
  filter: none;
}

.nav-links a.nav-btn {
  padding: 0.9rem 2.8rem;
  font-size: 0.7rem;
}

.menu-toggle {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 8px;
}

.menu-toggle .bar {
  width: 30px;
  height: 1px;
  background-color: var(--color-primary);
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background-color: var(--color-bg-light);
  padding-top: 100px;
}

.hero-content {
  flex: 1;
  z-index: 2;
  position: relative;
  padding-right: 5rem;
}

.hero-title {
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 300;
  margin-bottom: 2.5rem;
  color: var(--color-primary);
}

.hero-title span {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.hero-subtitle {
  font-size: 1.15rem;
  max-width: 520px;
  line-height: 1.7;
  color: var(--color-text-muted);
  font-weight: 300;
  margin-bottom: 4rem;
}

.hero-image-wrapper {
  flex: 1.2;
  height: 75vh;
  position: relative;
  overflow: hidden;
}

.hero-blueprint {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(var(--color-divider) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
  pointer-events: none;
}

.hero-coords {
  position: absolute;
  right: 4rem;
  top: 50%;
  transform: translateY(-50%) rotate(90deg);
  transform-origin: center right;
  display: flex;
  gap: 4rem;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  opacity: 0.4;
  text-transform: uppercase;
  z-index: 5;
}

.hero-coords span {
  white-space: nowrap;
}

/* What We Do - Refined Service Cards */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background-color: var(--color-divider);
  margin-top: 4rem;
  border: 1px solid var(--color-divider);
}

.service-card {
  padding: 4rem 3rem;
  background-color: var(--color-bg-white);
  transition: all var(--transition-fast);
}

.service-card:hover {
  background-color: var(--color-bg-gray);
}

.service-number {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 3rem;
  display: block;
}

.service-title {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.service-desc {
  color: var(--color-text-muted);
  margin-bottom: 3rem;
  font-size: 1rem;
  font-weight: 300;
}

.service-link {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: 0.3rem;
}

/* Matrix Row Styles */
.matrix-row {
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.matrix-row:hover {
  transform: translateX(1.5rem);
}

.matrix-row:hover span {
  opacity: 1;
}

.matrix-row div[style*="background-image"] {
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.8s ease;
}

.matrix-row:hover div[style*="background-image"] {
  transform: scale(1.02);
}

.differential-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 3rem;
  font-weight: 300;
}

.differential-desc {
  font-size: 1.25rem;
  margin-bottom: 4rem;
  font-weight: 300;
  color: var(--color-text-muted);
}

.img-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background-color: #f0f0f0;
  background-position: center;
  background-size: cover;
}

/* Process Section - Linear and Clean */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4rem;
  margin-top: 6rem;
}

.process-step {
  border-top: 1px solid var(--color-divider);
  padding-top: 2rem;
}

.step-icon {
  font-size: 0.75rem;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
}

.step-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* Featured Projects - Architectural Grid */
.flex-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 6rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6rem;
}

.project-card {
  display: block;
}

.project-img-wrapper {
  overflow: hidden;
  aspect-ratio: 3/2;
  margin-bottom: 2rem;
  background-color: #f0f0f0;
}

.project-img {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-slow);
}

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

.project-title {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.project-category {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

/* Lightbox Modal */
.lightbox-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  z-index: 20000;
  justify-content: center;
  align-items: center;
  cursor: zoom-out;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.lightbox-modal.active {
  display: flex;
  opacity: 1;
}

.lightbox-img {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 30px 60px rgba(0,0,0,0.1);
}

.lightbox-close {
  position: absolute;
  top: 3rem;
  right: 3rem;
  font-size: 2rem;
  cursor: pointer;
  color: var(--color-primary);
}

.cta-desc {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 4rem;
  font-weight: 300;
}

/* Footer */
.footer {
  padding: 8rem 0 4rem;
  border-top: 1px solid var(--color-divider);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr 1fr; /* Optimized 4-column for Brand, Locations, Nav, Contact */
  gap: 4rem;
  margin-bottom: 6rem;
  align-items: start;
}

.footer-brand .logo {
  margin-bottom: 2.5rem;
}

.footer-desc {
  color: var(--color-text-muted);
  font-weight: 300;
  max-width: 350px;
}

.footer h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 2.5rem;
  color: var(--color-primary);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.footer-links a, .footer-contact p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 300;
}

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

.footer-bottom {
  padding-top: 4rem;
  border-top: 1px solid var(--color-divider);
  color: var(--color-accent);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

/* Utilities */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* Responsive adjustments */
@media (max-width: 1024px) {
  :root { --container-padding: 2rem; }
  .hero-image-wrapper { width: 45%; right: 0; top: 20%; height: 60%; }
  .differential-container { gap: 4rem; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 6rem 0; }
  .hero-content { padding-top: 4rem; }
  .hero-image-wrapper { position: relative; width: 100%; height: 400px; right: 0; top: 0; margin-top: 4rem; }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; gap: 4rem; }
  .differential-container { grid-template-columns: 1fr; }
  .process-timeline { grid-template-columns: 1fr 1fr; gap: 4rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 4rem; }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--color-bg-white);
    flex-direction: column;
    justify-content: center;
    padding: 4rem;
    transition: right var(--transition-fast);
    box-shadow: -10px 0 30px rgba(0,0,0,0.05);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .menu-toggle { display: flex; z-index: 101; }
}

/* --- Project Overlay System --- */
.project-item, .project-main-media, .project-side-media > div {
  position: relative;
  overflow: hidden;
}

.project-bg-img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-item:hover .project-bg-img,
.project-main-media:hover .project-bg-img,
.project-side-media > div:hover .project-bg-img {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.7); /* Deep technical veil */
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
  padding: 3rem;
  pointer-events: none;
  z-index: 5;
}

.project-item:hover .project-overlay,
.project-main-media:hover .project-overlay,
.project-side-media > div:hover .project-overlay {
  opacity: 1;
}

.overlay-content {
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-item:hover .overlay-content,
.project-main-media:hover .overlay-content,
.project-side-media > div:hover .overlay-content {
  transform: translateY(0);
}

.overlay-content span {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
  color: rgba(255, 255, 255, 0.5);
}

.overlay-content p {
  font-size: 1rem;
  font-weight: 300;
  color: #fff;
  line-height: 1.6;
  max-width: 280px;
}