:root {
  /* Primary Background - Deep Ink */
  --bg-primary: #0A1220;
  /* Secondary Background - Slate Blueprint */
  --bg-secondary: #132032;
  /* Panels - Steel Navy */
  --bg-panel: #1C2C42;
  /* Primary Text - Ivory White */
  --text-primary: #FAFBFC;
  /* Secondary Text - Fog Grey */
  --text-secondary: #B8C3D1;
  /* Accent - Emerald Green */
  --accent: #24D17E;
  /* Accent Hover - Bright Emerald */
  --accent-hover: #5CFFB2;
  /* Highlight - Champagne Gold */
  --highlight: #D7C18A;
  
  /* Typography */
  --font-heading: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  
  /* Layout */
  --container-width: 1200px;
  --spacing-sm: 1rem;
  --spacing-md: 2.5rem;
  --spacing-lg: 5rem;
  --spacing-xl: 8rem;
  
  /* Borders */
  --border-thin: 1px solid rgba(250, 251, 252, 0.1);
  --border-accent: 1px solid var(--accent);
}

:root[data-theme="light"] {
  --bg-primary: #FAFBFC;
  --bg-secondary: #E5E9F0;
  --bg-panel: #FFFFFF;
  --text-primary: #0A1220;
  --text-secondary: #4C566A;
  --accent: #19995B;
  --accent-hover: #137A47;
  --border-thin: 1px solid rgba(10, 18, 32, 0.1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }

p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* Layout Classes */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: var(--spacing-xl) 0;
}

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
@media (min-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}

/* Blueprint Architectural Border System */
.blueprint-card {
  position: relative;
  background-color: var(--bg-panel);
  border: var(--border-thin);
  padding: 2.5rem;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.blueprint-card::before, .blueprint-card::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  transition: all 0.4s ease;
  z-index: 10;
}

.blueprint-card::before {
  top: -1px; left: -1px;
  border-top: var(--border-accent);
  border-left: var(--border-accent);
}

.blueprint-card::after {
  bottom: -1px; right: -1px;
  border-bottom: var(--border-accent);
  border-right: var(--border-accent);
}

.blueprint-card:hover {
  border-color: rgba(36, 209, 126, 0.3);
  box-shadow: inset 0 0 25px rgba(36, 209, 126, 0.05), 0 10px 30px rgba(0,0,0,0.3);
  transform: translateY(-5px);
}

.blueprint-card:hover::before, .blueprint-card:hover::after {
  width: 30px;
  height: 30px;
  box-shadow: 0 0 10px rgba(36, 209, 126, 0.4);
}

.blueprint-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  margin-bottom: 1.5rem;
  border: var(--border-thin);
  filter: grayscale(20%) contrast(1.1);
  transition: filter 0.4s ease;
}

.blueprint-card:hover img {
  filter: grayscale(0%) contrast(1.1);
}

.blueprint-card .tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.blueprint-card .tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
  border-radius: 20px;
}

/* Navigation */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 18, 32, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: var(--border-thin);
  transition: all 0.3s ease;
}

:root[data-theme="light"] .site-header {
  background: rgba(250, 251, 252, 0.9);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  max-width: var(--container-width);
  margin: 0 auto;
}

.brand-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-logo::before {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  background-color: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.8rem;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background-image: linear-gradient(rgba(10, 18, 32, 0.8), rgba(10, 18, 32, 0.9)), url('images/architecture-blueprint-hero-background.jpg');
  background-size: cover;
  background-position: center;
  z-index: -1;
  opacity: 0.4;
}

.hero-content {
  max-width: 800px;
  position: relative;
}

.hero-content::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0;
  height: 100%;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.hero-subtitle {
  color: var(--highlight);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: block;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background-color: transparent;
  border: 1px solid var(--accent);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%; width: 100%; height: 100%;
  background-color: var(--accent);
  z-index: -1;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn:hover {
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(36, 209, 126, 0.4);
}

/* Scroll Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Page Header */
.page-header {
  padding: var(--spacing-xl) 0 var(--spacing-md);
  background-color: var(--bg-secondary);
  border-bottom: var(--border-thin);
  text-align: center;
}

/* Footer */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: var(--border-thin);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.editorial-disclaimer-box {
  background-color: rgba(0,0,0,0.2);
  border-left: 2px solid var(--highlight);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.editorial-disclaimer-box p {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: var(--border-thin);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 1rem;
  background-color: var(--bg-primary);
  border: var(--border-thin);
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: inset 0 0 10px rgba(36, 209, 126, 0.1);
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--bg-panel);
  border-top: var(--border-accent);
  padding: 1.5rem;
  z-index: 9999;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transform: translateY(100%);
  transition: transform 0.5s ease;
  box-shadow: 0 -10px 30px rgba(0,0,0,0.5);
}

.cookie-banner.active {
  transform: translateY(0);
}

.cookie-text {
  max-width: 60%;
}

.cookie-text p {
  margin: 0;
  font-size: 0.9rem;
}

.cookie-actions {
  display: flex;
  gap: 1rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-panel);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: clip-path 0.4s ease;
    border-bottom: var(--border-thin);
  }
  
  .nav-links.active {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .cookie-banner {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .cookie-text {
    max-width: 100%;
  }
  
  .cookie-actions {
    flex-wrap: wrap;
    justify-content: center;
  }
}