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

:root {
  --primary: #0f172a;
  --accent: #0ea5e9;
  --secondary: #06b6d4;
  --dark: #1e293b;
  --light: #f8fafc;
  --white: #ffffff;
  --gray: #64748b;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--white);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

header {
  background: transparent;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transform: translateY(0);
  transition: all 0.3s ease;
}

header.scrolled {
  background: rgba(15, 23, 42, 1);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid rgba(14, 165, 233, 0.3);
}

header.hidden {
  transform: translateY(-100%);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 40px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--white);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s;
  padding: 10px 20px;
  border-radius: 8px;
}

.nav-links a:hover {
  background: rgba(14, 165, 233, 0.15);
  color: var(--white);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--white);
}

.hero {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.75) 0%, rgba(30, 41, 59, 0.75) 100%), url('construction-hero.svg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: 0;
  position: sticky;
  top: 0;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  width: 150%;
  height: 150%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
  top: -25%;
  left: -25%;
}

.hero::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
  padding: 100px 40px;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  background: rgba(14, 165, 233, 0.2);
  color: #7dd3fc;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(14, 165, 233, 0.4);
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.subtitle {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 400;
  line-height: 1.6;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

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

.cta-button {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  padding: 16px 32px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(14, 165, 233, 0.4);
  background: #0284c7;
}

.cta-button.secondary {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
}

.cta-button.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.hero-visual {
  position: relative;
  height: 500px;
  display: none;
}

.floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(1) {
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}

.floating-card:nth-child(2) {
  bottom: 15%;
  left: 5%;
  animation-delay: 1s;
}

.floating-card:nth-child(3) {
  top: 50%;
  right: 5%;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.card-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.services {
  padding: 120px 40px;
  padding-top: 180px;
  background: #ffffff;
  position: relative;
  z-index: 2;
  border-radius: 40px 40px 0 0;
  margin-top: -40px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-tag {
  color: #075985;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

.services h2,
.about h2,
.contact h2 {
  font-size: 2.75rem;
  margin-bottom: 1rem;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: -1px;
}

.section-description {
  font-size: 1.1rem;
  color: #475569;
  line-height: 1.7;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  border: 1px solid rgba(14, 165, 233, 0.1);
  transition: all 0.3s ease;
  position: relative;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  border-radius: 16px 16px 0 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.service-card:hover::before {
  opacity: 1;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(14, 165, 233, 0.15);
  border-color: rgba(14, 165, 233, 0.3);
}

.icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  background: linear-gradient(135deg, var(--accent) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.service-card h3 {
  margin-bottom: 1rem;
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 600;
}

.service-card p {
  color: #475569;
  line-height: 1.7;
}

.about {
  padding: 120px 40px;
  padding-top: 180px;
  background: #f8fafc;
  position: relative;
  z-index: 3;
  border-radius: 40px 40px 0 0;
  margin-top: -40px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.about .container {
  max-width: 900px;
}

.about p {
  font-size: 1.15rem;
  color: #475569;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.entity-info {
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  font-size: 0.95rem;
  color: #475569;
  text-align: center;
}

.contact {
  padding: 120px 40px;
  padding-top: 180px;
  background: #ffffff;
  position: relative;
  z-index: 4;
  border-radius: 40px 40px 0 0;
  margin-top: -40px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-item {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  border: 1px solid rgba(14, 165, 233, 0.1);
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(14, 165, 233, 0.12);
  border-color: rgba(14, 165, 233, 0.3);
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.contact-item h3 {
  margin-bottom: 0.75rem;
  color: var(--primary);
  font-size: 1.1rem;
  font-weight: 600;
}

.contact-item p {
  margin: 0;
}

.contact-item a {
  color: #075985;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
}

.contact-item a:hover {
  color: #0c4a6e;
}

footer {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  padding: 3rem 40px;
  font-size: 0.95rem;
  position: relative;
  z-index: 5;
  border-radius: 40px 40px 0 0;
  margin-top: -40px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.2);
}

@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .cta-buttons {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  nav .container {
    padding: 1rem 20px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0f172a;
    flex-direction: column;
    padding: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: none;
    gap: 0;
  }

  .nav-links li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
    color: var(--white);
  }

  .nav-links.active {
    display: flex;
  }

  .hero {
    min-height: auto;
  }

  .hero .container {
    padding: 60px 20px;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .subtitle {
    font-size: 1.1rem;
  }

  .services,
  .about,
  .contact {
    padding: 80px 20px;
    padding-top: 100px;
    padding-bottom: 100px;
    position: relative;
  }

  .services h2,
  .about h2,
  .contact h2 {
    font-size: 2rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-button {
    width: 100%;
    text-align: center;
  }
}