:root {
  --primary-color: #3ca273;
  --secondary-color: #ffffff;
  --background-color: #f5f5f5;
  --text-color: #333;
  --header-bg: #ffffff;
  --link-color: #3ca273;
  --accent-color: #e0f2ec;
  --transition-speed: 0.3s;
}

body.dark-mode {
  --primary-color: #3ca273;
  --secondary-color: #1e1e1e;
  --background-color: #121212;
  --text-color: #e4e4e4;
  --header-bg: #1e1e1e;
  --link-color: #91dab7;
  --accent-color: #26332e;
}

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

body {
  font-family: "Segoe UI", sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  line-height: 1.6;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease-out forwards;
}

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

.site-header {
  background-color: var(--header-bg);
  border-bottom: 1px solid #ccc;
  transition: background-color var(--transition-speed);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1.2rem;
}

.logo img {
  height: 40px;
  width: auto;
  border-radius: 8px;
}

/* Centrirana navigacija */
.nav {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav .main-menu {
  list-style: none;
  display: flex;
  gap: 2rem;
  justify-content: center;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 600;
  padding: 0;
  margin: 0;
}

.nav .main-menu a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav .main-menu a:hover {
  color: var(--primary-color);
}

/* Kontrole u desnom kutu */
.top-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-color);
}

.hero {
  position: relative;
  background-image: url("background.jpeg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
  text-align: center;
  padding: 6rem 1rem 4rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 0;
}

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

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
}

.hero .btn {
  font-size: 1.1rem;
  padding: 0.8rem 1.6rem;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 30px;
  text-decoration: none;
  transition: background-color 0.3s ease;
}

.hero .btn:hover {
  background-color: #2b7e58;
}

.btn {
  background-color: var(--primary-color);
  color: #fff;
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color var(--transition-speed);
}

.btn:hover {
  background-color: #2b7e58;
}

.services-section {
  padding: 3rem 0;
  background-color: var(--background-color);
}

.services-section h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
  color: var(--primary-color);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background-color: var(--secondary-color);
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
}

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

.site-footer {
  text-align: center;
  padding: 1rem 0;
  background-color: var(--header-bg);
  color: var(--text-color);
  border-top: 1px solid #ccc;
  margin-top: 2rem;
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  padding: 2rem 0;
}

.gallery-grid img {
  width: 100%;
  border-radius: 12px;
  transition: transform 0.3s ease;
}

.gallery-grid img:hover {
  transform: scale(1.03);
}

/* Contact form */
.contact-form {
  background-color: var(--secondary-color);
  padding: 2rem;
  max-width: 600px;
  margin: auto;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.contact-form label {
  display: block;
  margin-bottom: 0.3rem;
  font-weight: bold;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.6rem;
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
}

.contact-form button {
  background-color: var(--primary-color);
  color: #fff;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}

.contact-form button:hover {
  background-color: #2b7e58;
}

/* Animacije */
.service-card:hover,
.gallery-item img:hover {
  transform: scale(1.03);
  transition: transform 0.3s ease;
}

.gallery-item {
  transition: transform 0.3s ease;
}

/* Lightbox */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: 2rem;
}

.lightbox-overlay img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  animation: zoomIn 0.4s ease-out;
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.service-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 1rem;
  filter: invert(40%) sepia(23%) saturate(288%) hue-rotate(90deg) brightness(94%) contrast(89%);
  transition: transform 0.3s ease;
}

.service-card:hover .service-icon {
  transform: scale(1.1);
}

/* CTA sekcija */
.cta-section {
  background-color: var(--accent-color);
  color: var(--text-color);
  padding: 4rem 2rem;
  text-align: center;
  border-radius: 16px;
  margin: 4rem auto;
}

.cta-section h2 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.cta-section .btn {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  max-width: 100%;
  padding: 0.8rem 1.6rem;
  font-size: 1rem;
  border-radius: 30px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  transition: background-color 0.3s ease;
}

@media (max-width: 600px) {
  .cta-section h2 {
    font-size: 1.5rem;
  }

  .cta-section p {
    font-size: 1rem;
  }

  .cta-section .btn {
    font-size: 1rem;
    padding: 0.7rem 1.2rem;
  }
}

.cta-section .btn:hover {
  background-color: #2a7d5e;
}

.cta-section .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.project-description {
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
  line-height: 1.6;
}

/* Responsive navigacija */
@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    position: static;
    transform: none;
    margin-top: 1rem;
  }

  .nav .main-menu {
    flex-direction: column;
    gap: 0.8rem;
    align-items: flex-start;
  }

  .top-controls {
    justify-content: flex-end;
    margin-top: 1rem;
  }
}