/* ============================================
   CONCRETE COVER BLOCKS - Industrial Theme CSS
   Modern, Fast, Responsive
   ============================================ */

/* CSS Custom Properties */
:root {
  --color-primary: #1a1a1a;
  --color-secondary: #333333;
  --color-accent: #dc2626;
  --color-accent-hover: #b91c1c;
  --color-concrete: #8a8a8a;
  --color-concrete-light: #d4d4d4;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-bg: #f0eeeb;
  --color-bg-alt: #e5e2dd;
  --color-surface: #ffffff;
  --color-border: #c5c2bd;
  --color-steel: #4a5568;
  --color-brick: #6b7280;
  --color-rust: #dc2626;
  --color-yellow: #9ca3af;
  
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  --container-max: 1400px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.text-gradient {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-brick) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.section-header p {
  color: #555555;
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(245, 245, 240, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(245, 245, 240, 0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.logo img {
  height: 100px;
  width: auto;
}

.logo img.small {
  height: 48px;
  width: auto;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.25rem;
  color: white;
}

.logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  position: relative;
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-normal);
}

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
}

.mobile-toggle span {
  width: 28px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(135deg, rgba(196, 92, 38, 0.08) 0%, transparent 50%),
    linear-gradient(225deg, rgba(74, 85, 104, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(196, 92, 38, 0.06) 2px, transparent 2px),
    linear-gradient(90deg, rgba(196, 92, 38, 0.06) 2px, transparent 2px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-diagonal {
  position: absolute;
  top: 0;
  right: -10%;
  width: 60%;
  height: 100%;
  background: linear-gradient(135deg, transparent 40%, rgba(74, 85, 104, 0.08) 100%);
  transform: skewX(-15deg);
  pointer-events: none;
}

.hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-shape {
  position: absolute;
  opacity: 0.06;
}

.hero-shape-1 {
  top: 15%;
  right: 10%;
  width: 200px;
  height: 200px;
  border: 8px solid var(--color-steel);
  border-radius: 8px;
  transform: rotate(15deg);
}

.hero-shape-2 {
  bottom: 20%;
  right: 25%;
  width: 150px;
  height: 150px;
  background: repeating-linear-gradient(
    45deg,
    var(--color-brick),
    var(--color-brick) 10px,
    transparent 10px,
    transparent 20px
  );
  transform: rotate(-10deg);
}

.hero-shape-3 {
  top: 40%;
  right: 5%;
  width: 100px;
  height: 100px;
  background: var(--color-steel);
  border-radius: 4px;
  transform: rotate(45deg);
}

.hero-shape-4 {
  top: 60%;
  right: 35%;
  width: 80px;
  height: 8px;
  background: var(--color-yellow);
  border-radius: 2px;
  transform: rotate(-30deg);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(196, 92, 38, 0.12);
  border: 1px solid rgba(196, 92, 38, 0.3);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.6s ease forwards;
}

.hero h1 {
  margin-bottom: var(--space-md);
  color: var(--color-primary);
  animation: fadeInUp 0.6s ease 0.1s forwards;
  opacity: 0;
}

.hero-description {
  font-size: 1.25rem;
  color: #4a4a4a;
  margin-bottom: var(--space-lg);
  max-width: 600px;
  animation: fadeInUp 0.6s ease 0.2s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  animation: fadeInUp 0.6s ease 0.3s forwards;
  opacity: 0;
}

.hero-stats {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 3px solid var(--color-border);
  animation: fadeInUp 0.6s ease 0.4s forwards;
  opacity: 0;
}

.stat {
  text-align: left;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-steel);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: #666666;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
  font-weight: 600;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 14px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-brick) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(196, 92, 38, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(196, 92, 38, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-steel);
  border: 2px solid var(--color-steel);
  font-weight: 700;
}

.btn-secondary:hover {
  background: var(--color-steel);
  color: white;
  border-color: var(--color-steel);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   PRODUCTS GRID
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition-normal);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-brick));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-image {
  height: 200px;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.product-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 20px,
      rgba(74, 85, 104, 0.03) 20px,
      rgba(74, 85, 104, 0.03) 21px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 20px,
      rgba(74, 85, 104, 0.03) 20px,
      rgba(74, 85, 104, 0.03) 21px
    );
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1rem;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-slow);
}

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

.product-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: 
    linear-gradient(135deg, #e5e2dd 0%, #d4d1cc 100%);
}

.product-placeholder svg {
  width: 80px;
  height: 80px;
  color: var(--color-steel);
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

.product-placeholder span {
  font-size: 0.75rem;
  color: #888888;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
}

.product-content {
  padding: var(--space-lg);
}

.product-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.product-content p {
  color: #555555;
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.product-tag {
  padding: 4px 10px;
  background: rgba(74, 85, 104, 0.1);
  border: 1px solid rgba(74, 85, 104, 0.2);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-steel);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-top: var(--space-md);
  transition: var(--transition-fast);
}

.product-link svg {
  width: 16px;
  height: 16px;
  transition: var(--transition-fast);
}

.product-link:hover svg {
  transform: translateX(4px);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
  background: var(--color-bg-alt);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0px,
    var(--color-accent) 20px,
    var(--color-steel) 20px,
    var(--color-steel) 40px,
    var(--color-brick) 40px,
    var(--color-brick) 60px
  );
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-card:hover::after {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(196, 92, 38, 0.15) 0%, rgba(139, 69, 19, 0.08) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  border: 1px solid rgba(196, 92, 38, 0.2);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.feature-card h4 {
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.feature-card p {
  color: #666666;
  font-size: 0.9rem;
  line-height: 1.6;
}

.product-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.product-content p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.product-tag {
  padding: 4px 10px;
  background: rgba(90, 102, 114, 0.1);
  border: 1px solid rgba(90, 102, 114, 0.2);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-steel);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: var(--space-md);
  transition: var(--transition-fast);
}

.product-link svg {
  width: 16px;
  height: 16px;
  transition: var(--transition-fast);
}

.product-link:hover svg {
  transform: translateX(4px);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
  background: var(--color-bg-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition-normal);
}

.feature-card:hover {
  border-color: rgba(255,107,0,0.3);
  transform: translateY(-4px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(196, 92, 38, 0.15) 0%, rgba(139, 69, 19, 0.1) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.feature-card h4 {
  margin-bottom: var(--space-xs);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-brick) 100%);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 30px,
      rgba(255,255,255,0.03) 30px,
      rgba(255,255,255,0.03) 60px
    );
}

.cta::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 40px,
    rgba(0,0,0,0.05) 40px,
    rgba(0,0,0,0.05) 80px
  );
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta h2 {
  color: white;
  margin-bottom: var(--space-sm);
}

.cta p {
  color: rgba(255,255,255,0.9);
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
}

.cta .btn {
  background: white;
  color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.cta .btn:hover {
  background: #f5f5f0;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-primary);
  padding: var(--space-2xl) 0 var(--space-lg);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0px,
    var(--color-accent) 20px,
    var(--color-steel) 20px,
    var(--color-steel) 40px,
    var(--color-brick) 40px,
    var(--color-brick) 60px
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand p {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  margin-top: var(--space-md);
  max-width: 320px;
  line-height: 1.7;
}

.footer-column h5 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
  color: var(--color-accent);
  font-weight: 700;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: white;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: var(--space-sm);
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  line-height: 1.5;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

.footer-contact-item a {
  color: rgba(255,255,255,0.85);
  transition: var(--transition-fast);
}

.footer-contact-item a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom p {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
}

/* ============================================
   FLOATING BUTTONS
   ============================================ */
.floating-buttons {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 999;
}

.float-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: var(--transition-normal);
  position: relative;
  border: 3px solid white;
}

.float-btn svg {
  width: 26px;
  height: 26px;
}

.float-btn-whatsapp {
  background: #25D366;
  color: white;
}

.float-btn-whatsapp:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(37,211,102,0.5);
}

.float-btn-brochure {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-brick) 100%);
  color: white;
}

.float-btn-brochure:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(90, 102, 114, 0.4);
}

.float-btn-tooltip {
  position: absolute;
  right: 70px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.float-btn:hover .float-btn-tooltip {
  opacity: 1;
}

/* ============================================
   PRODUCT DETAIL PAGE
   ============================================ */
.product-detail {
  padding-top: calc(var(--header-height) + var(--space-xl));
}

.product-detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.product-detail-image {
  aspect-ratio: 1/1;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-steel);
  opacity: 0.5;
}

.product-placeholder svg {
  width: 80px;
  height: 80px;
}

.product-detail-info h1 {
  margin-bottom: var(--space-md);
}

.product-detail-info .lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.product-specs {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.product-specs-header {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-secondary);
  border-bottom: 1px solid var(--color-border);
}

.product-specs-header h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.specs-table {
  width: 100%;
  max-width: 500px;
  border-collapse: collapse;
  margin-top: 1.5rem;
}

.specs-table th,
.specs-table td {
  padding: 14px 20px;
  text-align: left;
  font-size: 1rem;
  border: 1px solid var(--color-border);
}

.specs-table th {
  background: var(--color-primary);
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  width: 50%;
}

.specs-table td {
  background: var(--color-surface);
  color: var(--color-text);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
  transition: var(--transition-fast);
}

.back-link:hover {
  color: var(--color-accent);
}

.back-link svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero-stats {
    gap: var(--space-lg);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
  
  .product-detail-hero {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
    --space-2xl: 3rem;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-2xl);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .stat {
    display: flex;
    align-items: center;
    gap: var(--space-md);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .floating-buttons {
    bottom: var(--space-md);
    right: var(--space-md);
  }
  
  .float-btn {
    width: 50px;
    height: 50px;
  }
  
  .float-btn-tooltip {
    display: none;
  }
  
  .product-detail-image {
    aspect-ratio: 16/10;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .product-content {
    padding: var(--space-md);
  }
  
  .feature-card {
    padding: var(--space-md);
  }
  
  .specs-table th,
  .specs-table td {
    padding: var(--space-sm) var(--space-md);
    display: block;
    width: 100%;
  }
  
  .specs-table th {
    background: transparent;
    padding-bottom: 4px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .header,
  .floating-buttons,
  .cta {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .product-card,
  .feature-card {
    break-inside: avoid;
  }
}