:root {
  --color-primary: #5a7d6c;
  --color-primary-dark: #4a6a5a;
  --color-primary-light: #e8f0ec;
  --color-text: #3d3d3d;
  --color-text-light: #6b6b6b;
  --color-bg: #fdfcfa;
  --color-bg-alt: #f5f3ef;
  --color-white: #ffffff;
  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-weight: 300;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(253, 252, 250, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 2rem;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 400;
  transition: color 0.3s ease;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* Language Switcher */
.lang-switch {
  display: flex;
  gap: 0.5rem;
  margin-left: 1.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid rgba(0,0,0,0.1);
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-text-light);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  color: var(--color-primary);
}

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

.nav-links .lang-switch {
  border-left: none;
  margin-left: 0;
  padding-left: 0;
}

/* Language Display Rules */
[data-lang="en"] { display: none; }
[data-lang="sr"] { display: block; }
span[data-lang="sr"], a[data-lang="sr"] { display: inline; }
span[data-lang="en"], a[data-lang="en"] { display: none; }
.services-grid[data-lang="sr"], .testimonials-grid[data-lang="sr"] { display: grid; }
.contact-info[data-lang="sr"] { display: flex; }
.contact-info[data-lang="en"] { display: none; }

html[lang="en"] [data-lang="en"] { display: block; }
html[lang="en"] [data-lang="sr"] { display: none; }
html[lang="en"] span[data-lang="en"], html[lang="en"] a[data-lang="en"] { display: inline; }
html[lang="en"] span[data-lang="sr"], html[lang="en"] a[data-lang="sr"] { display: none; }
html[lang="en"] .services-grid[data-lang="en"], html[lang="en"] .testimonials-grid[data-lang="en"] { display: grid; }
html[lang="en"] .contact-info[data-lang="en"] { display: flex; }
html[lang="en"] .contact-info[data-lang="sr"] { display: none; }

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-primary-light) 100%);
}

.hero-content {
  max-width: 700px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  border: 2px solid var(--color-primary);
}

.btn:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

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

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

/* Sections */
section {
  padding: 6rem 2rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

.divider {
  width: 60px;
  height: 2px;
  background: var(--color-primary);
  margin: 1.5rem auto;
}

/* About Section */
.about {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-photo {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: 8px;
}

.about-content h3 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.about-content p {
  margin-bottom: 1.25rem;
  color: var(--color-text-light);
}

.credentials {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(0,0,0,0.1);
}

.credentials h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.credentials ul {
  list-style: none;
}

.credentials li {
  padding: 0.35rem 0;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--color-white);
  padding: 2.5rem 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}

.service-icon {
  width: 50px;
  height: 50px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
  font-size: 1.5rem;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Approach Section */
.approach {
  background: var(--color-bg-alt);
}

.approach-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.approach-text h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.approach-text p {
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.approach-list {
  list-style: none;
}

.approach-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.approach-list li:last-child {
  border-bottom: none;
}

.approach-number {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 500;
  flex-shrink: 0;
}

.approach-list h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.approach-list p {
  margin: 0;
  font-size: 0.9rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.testimonial-card p {
  font-style: italic;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 500;
}

.author-info span {
  display: block;
}

.author-name {
  font-weight: 500;
  color: var(--color-text);
}

.author-detail {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
}

.contact .section-header h2 {
  color: var(--color-white);
}

.contact .section-header p {
  color: rgba(255,255,255,0.85);
}

.contact .divider {
  background: rgba(255,255,255,0.4);
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.contact-item {
  text-align: center;
}

.contact-item h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  opacity: 0.8;
}

.contact-item p {
  font-size: 1.1rem;
}

.contact-item a {
  color: var(--color-white);
  text-decoration: none;
}

.contact-item a:hover {
  text-decoration: underline;
}

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

.contact .btn:hover {
  background: transparent;
  color: var(--color-white);
}

/* Footer */
footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 2.5rem 2rem;
}

footer p {
  font-size: 0.9rem;
}

footer a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid,
  .approach-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-image {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
  }

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

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

  section {
    padding: 4rem 1.5rem;
  }

  .hero {
    padding: 5rem 1.5rem;
  }

  .contact-info {
    gap: 2rem;
  }
}