:root {
  --primary-color: #0d4d2f;
  --secondary-color: #1c7c54;
  --accent-color: #ffffff;
  --dark-color: #0a0a0a;
  --gray-color: #f3f3f3;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
  font-family: "Poppins", sans-serif;
}

body {
  background: var(--accent-color);
  color: var(--dark-color);
  line-height: 1.6;
}

.navbar {
  background: var(--primary-color);
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 10%;
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  font-size: 1.2rem;
  font-weight: bold;
}

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

.navbar ul {
  display: flex;
  list-style: none;
}

.navbar li {
  margin-left: 20px;
}

.navbar a {
  color: white;
  text-decoration: none;
  transition: 0.3s;
}

.navbar a:hover {
  color: var(--secondary-color);
}

.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/hero-bg.jpg') center/cover no-repeat;
  color: white;
  text-align: center;
  padding: 120px 10%;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 30px;
}

.btn {
  padding: 10px 25px;
  border: none;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
}

.btn.primary {
  background: var(--secondary-color);
  color: white;
}

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

section {
  padding: 60px 10%;
}

.about {
  background: var(--gray-color);
  border-top: 3px solid var(--secondary-color);
}

.about h2, .services h2, .clients h2, .sustainability h2, .footer h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.values {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.values li {
  background: var(--secondary-color);
  color: white;
  padding: 8px 15px;
  border-radius: 5px;
}

.services {
  background: white;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.service-card {
  background: var(--gray-color);
  padding: 20px;
  border-radius: 10px;
  transition: transform 0.3s;
}

.service-card:hover {
  transform: translateY(-5px);
}

.sustainability {
  background: var(--secondary-color);
  color: white;
  text-align: center;
}

.footer {
  background: var(--primary-color);
  color: white;
  text-align: center;
  padding: 40px 10%;
}

.socials a {
  color: white;
  margin: 0 8px;
  text-decoration: none;
}

.socials a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
}