@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400;500;600;700&display=swap');

:root {
  --primary-color: #000000;
  --secondary-color: #333333;
  --accent-color: #005f73;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --border-color: #eeeeee;
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --section-padding: 120px;
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--secondary-color);
  background: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

/* Typography styles */
h1, h2, h3, h4 {
  color: var(--primary-color);
  font-weight: 300;
  margin-bottom: 24px;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background-color: var(--accent-color);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 90px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.header.scrolled {
  background: var(--bg-white);
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-color);
}

.lang-switch {
  display: flex;
  gap: 10px;
  margin-left: 20px;
  border-left: 1px solid var(--border-color);
  padding-left: 20px;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: #888;
  transition: var(--transition);
}

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

/* Mobile Menu Button */
.menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-color);
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.slide.active {
  opacity: 1;
}

.slide::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5); /* Readability overlay */
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 800px;
  padding: 0 20px;
}

.hero-subtitle {
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 20px;
  color: rgba(255, 255, 255, 0.9);
}

.hero-title {
  color: #fff;
  font-size: 3.5rem;
  font-weight: 300;
  margin-bottom: 30px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.slider-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 12px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active {
  background: #fff;
  transform: scale(1.2);
}

/* Project Details Section */
.project-details {
  padding: var(--section-padding) 5%;
  background: var(--bg-white);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.detail-card {
  text-align: center;
  padding: 40px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-white);
  transition: var(--transition);
}

.detail-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  border-color: #ddd;
}

.detail-icon {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: 20px;
}

.detail-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.detail-label {
  font-size: 0.9rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Project Photos Section */
.project-gallery {
  padding: calc(var(--section-padding) / 2) 5% var(--section-padding);
  background: var(--bg-light);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  aspect-ratio: 4/3;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  filter: grayscale(20%);
}

.gallery-item:hover .gallery-img {
  transform: scale(1.05);
  filter: grayscale(0%);
}

/* Footer / Contact */
.footer {
  background: var(--bg-light);
  padding: 80px 5% 40px;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto 60px;
}

.footer-col h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.contact-info {
  list-style: none;
}

.contact-info li {
  margin-bottom: 15px;
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.contact-info i {
  color: var(--accent-color);
  margin-top: 5px;
}

.company-details p {
  margin-bottom: 10px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: #888;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 90px;
    left: 0;
    width: 100%;
    background: var(--bg-white);
    flex-direction: column;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  }

  .nav-menu.show {
    display: flex;
  }
  
  .menu-btn {
    display: block;
  }
  
  .lang-switch {
    border-left: none;
    padding-left: 0;
    margin-top: 10px;
    justify-content: center;
  }
}