/* Reset e variabili */
:root {
  --primary-color: #0066cc;
  --secondary-color: #ff6600;
  --dark-color: #1a1a1a;
  --light-color: #f8f9fa;
  --gray-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: #f5f7fa;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--dark-color), #2a2a2a);
  color: white;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--box-shadow);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo h1 {
  font-size: 1.8rem;
  margin-bottom: 5px;
  color: white;
}

.logo h1 i {
  color: var(--primary-color);
  margin-right: 10px;
}

.logo p {
  font-size: 0.9rem;
  color: var(--gray-color);
  margin: 0;
}

.navbar ul {
  display: flex;
  list-style: none;
  gap: 25px;
}

.navbar a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: var(--border-radius);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.navbar a:hover,
.navbar a.active {
  background: var(--primary-color);
}

.navbar a i {
  font-size: 0.9rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 60px 0;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-content h2 {
  font-size: 2.5rem;
  color: var(--dark-color);
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--gray-color);
  margin-bottom: 30px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

.hero-image img {
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.hero-image img:hover {
  transform: scale(1.02);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background: #0052a3;
}

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

.btn-secondary:hover {
  background: #e65c00;
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.9rem;
}

/* Featured Projects */
.featured-projects {
  padding: 60px 0;
  background: white;
}

.featured-projects h2 {
  text-align: center;
  margin-bottom: 40px;
  color: var(--dark-color);
  font-size: 2rem;
}

.featured-projects h2 i {
  color: var(--primary-color);
  margin-right: 10px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.project-card {
  background: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.project-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--primary-color);
  color: white;
  padding: 5px 10px;
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 600;
}

.project-info {
  padding: 20px;
}

.project-info h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.project-info p {
  color: var(--gray-color);
  margin-bottom: 15px;
  font-size: 0.95rem;
}

.project-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
  font-size: 0.9rem;
  color: var(--gray-color);
}

.project-meta i {
  margin-right: 5px;
}

/* Categories */
.categories {
  padding: 60px 0;
  background: #f8f9fa;
}

.categories h2 {
  text-align: center;
  margin-bottom: 40px;
  color: var(--dark-color);
  font-size: 2rem;
}

.categories h2 i {
  color: var(--primary-color);
  margin-right: 10px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
}

.category-card {
  background: white;
  padding: 25px 20px;
  border-radius: var(--border-radius);
  text-align: center;
  text-decoration: none;
  color: var(--dark-color);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.category-card:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
}

.category-card i {
  font-size: 2rem;
  margin-bottom: 10px;
}

.category-card span {
  font-weight: 600;
}

/* Footer */
.footer {
  background: var(--dark-color);
  color: white;
  padding: 50px 0 0;
}

.footer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: white;
  position: relative;
  padding-bottom: 10px;
}

.footer-section h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 2px;
  background: var(--primary-color);
}

.footer-section p {
  color: var(--gray-color);
  margin-bottom: 20px;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 10px;
}

.footer-section ul li a {
  color: var(--gray-color);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--gray-color);
  font-size: 0.9rem;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
  box-shadow: var(--box-shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #0052a3;
}

/* Responsive */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
    margin-bottom: 30px;
  }

  .hero-content h2 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 15px;
  }

  .navbar ul {
    flex-direction: column;
    gap: 10px;
    text-align: center;
    margin-top: 15px;
  }

  .mobile-menu-btn {
    display: block;
  }

  .navbar {
    display: none;
    width: 100%;
  }

  .navbar.active {
    display: block;
  }

  .hero-content p {
    font-size: 1rem;
  }

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

@media (max-width: 576px) {
  .hero-content h2 {
    font-size: 1.8rem;
  }

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

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}