/* ============================================
   HydroProtect — Modern Industrial Design
   ============================================ */

:root {
  /* Colors */
  --bg-primary: hsl(215, 32%, 4%);
  --bg-secondary: hsl(215, 28%, 8%);
  --bg-tertiary: hsl(215, 25%, 12%);
  --surface: hsl(215, 22%, 16%);
  --surface-elevated: hsl(215, 20%, 20%);
  
  --text-primary: hsl(210, 15%, 95%);
  --text-secondary: hsl(210, 12%, 70%);
  --text-muted: hsl(210, 10%, 55%);
  
  --primary: hsl(200, 85%, 54%);
  --primary-light: hsl(200, 85%, 64%);
  --primary-dark: hsl(200, 85%, 44%);
  
  --accent: hsl(35, 92%, 58%);
  --accent-light: hsl(35, 92%, 68%);
  
  --danger: hsl(0, 78%, 62%);
  --danger-light: hsl(0, 78%, 72%);
  
  --border: hsl(215, 20%, 25%);
  --border-subtle: hsl(215, 15%, 18%);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px hsl(215, 30%, 0%, 0.3);
  --shadow-md: 0 4px 16px hsl(215, 30%, 0%, 0.4);
  --shadow-lg: 0 8px 32px hsl(215, 30%, 0%, 0.5);
  --shadow-glow: 0 0 40px hsl(200, 85%, 54%, 0.3);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Border radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  
  /* Typography */
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-heading: "Space Grotesk", system-ui, sans-serif;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

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

/* Utilities */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-tertiary { background: var(--bg-tertiary); }
.bg-surface { background: var(--surface); }
.bg-surface-elevated { background: var(--surface-elevated); }

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-subtle);
  background: hsla(215, 32%, 4%, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: hsla(215, 32%, 4%, 0.95);
  border-bottom-color: var(--border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-links a {
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.nav-cta {
  color: var(--primary) !important;
  font-weight: 600;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-primary);
  background-image: url('images/entreprise-etancheite-liquide.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(10, 22, 40, 0.75) 50%, rgba(10, 22, 40, 0.85) 100%),
    radial-gradient(circle at 20% 50%, hsla(200, 85%, 54%, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, hsla(35, 92%, 58%, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, hsla(215, 85%, 64%, 0.05) 0%, transparent 50%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(hsla(200, 85%, 54%, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, hsla(200, 85%, 54%, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
  0% { transform: translate(0, 0); }
  100% { transform: translate(80px, 80px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 8rem var(--space-lg) 4rem;
  max-width: 680px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
  color: var(--text-primary);
}

.hero-text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  border: 1px solid hsla(200, 85%, 54%, 0.4);
  background: hsla(200, 85%, 54%, 0.15);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  padding: var(--space-xs) var(--space-md);
  margin-bottom: var(--space-xl);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse-glow 3s ease-in-out infinite;
  box-shadow: 0 0 10px var(--primary);
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.2); }
}

.stats {
  display: flex;
  gap: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.stat {
  text-align: center;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--primary);
  display: block;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-weight: 600;
  font-size: 1rem;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--bg-primary);
  box-shadow: 0 4px 16px hsla(35, 92%, 58%, 0.3);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px hsla(35, 92%, 58%, 0.4);
}

.btn-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-cta:hover::before {
  left: 100%;
}

.btn-cta-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.125rem;
}

.arrow {
  font-size: 1.2em;
  transition: transform var(--transition-fast);
}

.btn:hover .arrow {
  transform: translateX(2px);
}

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

.bg-card {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.7;
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.grid-2-asymmetric {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover::before {
  opacity: 0.5;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-primary:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-destructive {
  border-color: hsla(0, 78%, 62%, 0.2);
  background: hsla(0, 78%, 62%, 0.05);
}

.card-destructive:hover {
  border-color: hsla(0, 78%, 62%, 0.4);
}

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

/* Icons */
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  transition: all var(--transition-normal);
}

.card-icon-lg {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.card-center .card-icon-lg {
  margin: 0 auto var(--space-md);
}

.bg-primary-light {
  background: hsla(200, 85%, 54%, 0.15);
  color: var(--primary);
}

.bg-danger-light {
  background: hsla(0, 78%, 62%, 0.15);
  color: var(--danger);
}

.border-primary-subtle {
  border: 1px solid hsla(200, 85%, 54%, 0.2);
}

/* Mobile Unit Section */
.mobile-unit-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.mobile-unit-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.mobile-unit-image:hover img {
  transform: scale(1.05);
}

.specs-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.spec {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all var(--transition-normal);
}

.spec:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.spec .card-icon {
  flex-shrink: 0;
}

.spec h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.spec p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Commitments Section */
.section-commitments {
  position: relative;
  overflow: hidden;
}

.glow-orb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, hsla(200, 85%, 54%, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(100px);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.1); }
}

.commitment {
  text-align: center;
  padding: var(--space-xl);
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition-normal);
}

.commitment:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-8px);
}

.commitment .card-icon-lg {
  margin: 0 auto var(--space-md);
}

.commitment h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.commitment p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.mb-16 { margin-bottom: var(--space-2xl); }
.cta-center { text-align: center; }

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-normal);
  transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .container { padding: 0 var(--space-md); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    padding: var(--space-xl);
    flex-direction: column;
    gap: var(--space-lg);
    align-items: flex-start;
    transition: right var(--transition-normal);
    z-index: 1000;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links a {
    font-size: 1.1rem;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-subtle);
    width: 100%;
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .grid-2-asymmetric { grid-template-columns: 1fr; }
  .hero-content { padding: 6rem var(--space-md) 3rem; }
  .section { padding: var(--space-xl) 0; }
  .stats { gap: var(--space-md); }
  .specs-list { gap: var(--space-lg); }
  
  .hero h1 {
    font-size: clamp(2rem, 6vw, 3rem);
  }
  
  .section-header h2 {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-sm); }
  .hero-content { padding: 4rem var(--space-sm) 2rem; }
  .section { padding: var(--space-lg) 0; }
  .card { padding: var(--space-lg); }
  .btn-cta { padding: var(--space-sm) var(--space-lg); }
  .stats { flex-direction: column; gap: var(--space-md); }
  .stat { text-align: left; }
}

/* Performance optimizations */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


/* Fix layout live */
.logo,
.logo-text,
.nav-links a {
  white-space: nowrap;
}

.logo {
  flex-shrink: 0;
}

.navbar-inner {
  gap: 2rem;
}

.nav-links {
  flex-wrap: nowrap;
}

.hero {
  padding-top: 72px;
}

.hero-content {
  padding-top: calc(8rem + 72px);
}

@media (max-width: 768px) {
  .hero {
    padding-top: 0;
  }

  .hero-content {
    padding-top: 6rem;
  }
}