:root {
  --bg-dark: #09090b;
  --bg-card: #18181b;
  --bg-card-hover: #27272a;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-gold: #D4AF37;
  --accent-gold-dim: #997b20;
  --border-color: #3f3f46;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(212, 175, 55, 0.15);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Playfair Display', serif; /* For headings to match luxury feel */
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  margin-top: 0;
  color: var(--text-primary);
  font-weight: 700;
}

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

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

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  position: sticky;
  top: 0;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  padding: 16px 0;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand img {
  height: 40px;
  width: auto;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-gold);
}

/* Hero */
.hero {
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 16px;
  background: linear-gradient(to right, #fff, #a1a1aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Sections */
.specs-section {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 40px;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 8px;
  color: var(--accent-gold);
}

.section-subtitle {
  color: var(--text-secondary);
}

/* Grids */
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 768px) {
  .spec-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards & Visualizations */
.preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.specs-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
}

.specs-table th {
  text-align: left;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  width: 40%;
}

.specs-table td {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: monospace;
}

/* Specific Application Mockups */

/* Business Card Mockup */
.biz-card {
  width: 340px; /* Scaled visual representation */
  height: 190px;
  background: #111;
  border: 1px solid #333;
  position: relative;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.biz-card-logo {
  width: 40px;
}

.biz-card-content h3 {
  font-size: 16px;
  margin-bottom: 4px;
  color: var(--accent-gold);
}

.biz-card-content p {
  font-size: 10px;
  color: #ccc;
  margin: 2px 0;
}

/* Letterhead Mockup */
.letterhead-mockup {
  width: 300px;
  height: 424px; /* A4 aspect ratio */
  background: #fff;
  color: #111;
  padding: 30px;
  position: relative;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.letterhead-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--accent-gold);
  padding-bottom: 15px;
  margin-bottom: 30px;
}

.letterhead-logo {
  width: 120px;
}

.dummy-text-lines {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.line {
  height: 4px;
  background: #e5e5e5;
  width: 100%;
}

.line.short { width: 60%; }

/* Website Mockup */
.website-frame {
  width: 100%;
  height: 300px;
  background: #000;
  border: 1px solid #333;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

.browser-bar {
  height: 24px;
  background: #222;
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 0 12px;
}

.dot { width: 8px; height: 8px; border-radius: 50%; background: #444; }

.web-hero {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: radial-gradient(circle at center, #222 0%, #000 100%);
}

/* Wall Signage Mockup */
.wall-mockup {
  width: 100%;
  height: 300px;
  background-color: #2a2a2a;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0h40v40H0V0zm20 20h20v20H20V20zM0 20h20v20H0V20z' fill='%23333' fill-opacity='0.4' fill-rule='evenodd'/%3E%3C/svg%3E");
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.wall-logo-3d {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5), 0 0 20px rgba(212, 175, 55, 0.3);
}

/* Outdoor Signage */
.signage-mockup {
  width: 200px;
  height: 300px;
  background: #111;
  border: 4px solid #444;
  border-radius: 4px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.signage-mockup::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.badge {
  display: inline-block;
  padding: 4px 8px;
  background: rgba(212, 175, 55, 0.1);
  color: var(--accent-gold);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  margin-bottom: 8px;
}

.dimension-line {
  position: absolute;
  background: var(--accent-gold);
}

.dim-h {
  height: 1px;
  left: 0; right: 0;
}
.dim-v {
  width: 1px;
  top: 0; bottom: 0;
}

/* Utilities */
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--accent-gold);
  color: #000;
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.2s;
}

.btn:hover {
  background: #fff;
  transform: translateY(-2px);
}