:root {
  /* Wireframe Aesthetic: "Blueprint Brutalist" */
  --wf-bg: #f8fafc;
  --wf-surface: #ffffff;
  --wf-text: #0f172a;
  --wf-text-muted: #64748b;
  --wf-border: #000000;
  --wf-accent: #3b82f6;
  --wf-radius: 4px;
  --wf-space-xs: 8px;
  --wf-space-sm: 16px;
  --wf-space-md: 24px;
  --wf-space-lg: 48px;
  --wf-space-xl: 80px;
  --wf-space-2xl: 120px;
  
  --wf-font-main: 'Courier Prime', 'Courier New', monospace;
  --wf-font-display: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--wf-bg);
  color: var(--wf-text);
  font-family: var(--wf-font-main);
  line-height: 1.5;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--wf-font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin: 0;
}

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

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 4rem);
}

/* Typography & Labels */
.section-label {
  display: inline-block;
  border: 2px solid var(--wf-border);
  padding: 4px 12px;
  font-weight: bold;
  font-size: 0.8rem;
  margin-bottom: var(--wf-space-md);
  background: var(--wf-surface);
}

/* Navigation (Row 1) */
.nav-header {
  border-bottom: 2px solid var(--wf-border);
  background: var(--wf-surface);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--wf-font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -1px;
}

.nav-links {
  display: flex;
  gap: var(--wf-space-md);
}

.nav-links a {
  font-weight: 600;
  font-size: 0.9rem;
}

.nav-contact {
  font-weight: bold;
  border: 2px solid var(--wf-border);
  padding: 8px 16px;
  background: var(--wf-surface);
  box-shadow: 4px 4px 0px var(--wf-border);
  transition: all 0.2s;
}

.nav-contact:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--wf-border);
}

/* Hero Section (Row 2) */
.hero {
  position: relative;
  height: 80vh;
  min-height: 600px;
  background-color: #e2e8f0;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 2px solid var(--wf-border);
}

.hero-placeholder {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(45deg, #cbd5e1 0, #cbd5e1 1px, transparent 0, transparent 50%);
  background-size: 40px 40px;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  background: var(--wf-surface);
  border: 4px solid var(--wf-border);
  padding: var(--wf-space-lg);
  box-shadow: 16px 16px 0px var(--wf-border);
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 0.9;
  margin-bottom: var(--wf-space-md);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: var(--wf-space-lg);
  max-width: 500px;
}

/* Common Section Spacing */
section {
  padding: var(--wf-space-xl) 0;
}

/* About Section (Row 3) */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--wf-space-lg);
  align-items: center;
}

.about-visual {
  height: 400px;
  border: 2px solid var(--wf-border);
  background: #f1f5f9;
  position: relative;
}

.about-content h2 {
  font-size: 2.5rem;
  margin-bottom: var(--wf-space-md);
}

/* Products Section (Row 4) */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--wf-space-md);
  margin-top: var(--wf-space-md);
}

.product-card {
  border: 2px solid var(--wf-border);
  background: var(--wf-surface);
  padding: var(--wf-space-sm);
  transition: transform 0.2s;
}

.product-card:hover {
  transform: translateY(-4px);
}

.product-image {
  height: 200px;
  background: #f1f5f9;
  border: 1px solid var(--wf-border);
  margin-bottom: var(--wf-space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.product-image::after {
  content: "IMAGE";
  font-size: 0.7rem;
  opacity: 0.3;
}

.product-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

/* Clients Section (Row 5) */
.clients-strip {
  border-top: 2px solid var(--wf-border);
  border-bottom: 2px solid var(--wf-border);
  padding: var(--wf-space-lg) 0;
  background: var(--wf-surface);
}

.clients-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--wf-space-lg);
  align-items: center;
  opacity: 0.6;
}

.client-logo {
  height: 40px;
  width: 140px;
  border: 1px dashed var(--wf-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: bold;
}

/* Testimonials (Row 6) */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--wf-space-lg);
}

.testimonial-card {
  border-left: 6px solid var(--wf-border);
  padding: var(--wf-space-md);
  background: var(--wf-surface);
}

.testimonial-text {
  font-size: 1.1rem;
  font-style: italic;
  margin-bottom: var(--wf-space-md);
}

.testimonial-author {
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  background: var(--wf-border);
  border-radius: 50%;
}

/* Footer (Row 7) */
footer {
  background: var(--wf-text);
  color: var(--wf-surface);
  padding: var(--wf-space-xl) 0 var(--wf-space-md);
  margin-top: var(--wf-space-2xl);
}

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

.footer-brand .logo {
  font-size: 2rem;
  margin-bottom: var(--wf-space-sm);
}

.footer-links h4 {
  margin-bottom: var(--wf-space-md);
  color: #94a3b8;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: var(--wf-space-md);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #94a3b8;
}

/* Placeholders */
.placeholder-image {
  width: 100%;
  background: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.placeholder-image::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  border-top: 1px solid rgba(0,0,0,0.1);
  transform: rotate(-45deg);
}

.placeholder-image::after {
  content: attr(data-label);
  font-weight: bold;
  opacity: 0.3;
  font-size: 0.8rem;
}

.placeholder-image.square { aspect-ratio: 1/1; }
.placeholder-image.portrait { aspect-ratio: 3/4; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-weight: bold;
  text-transform: uppercase;
  border: 2px solid var(--wf-border);
  background: var(--wf-text);
  color: var(--wf-surface);
  box-shadow: 4px 4px 0px var(--wf-accent);
  transition: all 0.1s;
}

.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 0px 0px 0px var(--wf-accent);
}

.btn-outline {
  background: transparent;
  color: var(--wf-text);
  box-shadow: 4px 4px 0px var(--wf-border);
}

/* Responsiveness */
@media (max-width: 768px) {
  .nav-links, .nav-contact { display: none; }
  .about-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { height: auto; padding: var(--wf-space-xl) 0; }
  .hero-content { box-shadow: 8px 8px 0px var(--wf-border); }
}