/* GIOFU Engineering Ltd - Modern 2025 Design */

:root {
  --primary-color: #056839;
  --primary-dark: #044a2b;
  --primary-light: #0a8f4f;
  --secondary-color: #1e40af;
  --accent-color: #f59e0b;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --white: #ffffff;
  --light-gray: #f9fafb;
  --border-gray: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header Styles */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

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

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

.logo img {
  height: 50px;
  width: auto;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.tagline {
  font-size: 0.9rem;
  font-style: italic;
  opacity: 0.9;
}

.nav {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
}

.nav a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  position: relative;
}

.nav a:hover,
.nav a.active {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

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

/* Hero Section */
.hero {
  margin-top: 80px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/BG.jpg') center/cover;
  opacity: 0.1;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #f3f4f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-slideshow {
  margin: 3rem 0;
  position: relative;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.slideshow-container {
  position: relative;
  height: 400px;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slide.active {
  opacity: 1;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* CTA Buttons */
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border: none;
  border-radius: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent-color);
  color: var(--text-dark);
}

.btn-primary:hover {
  background: #d97706;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

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

/* Services Section */
.services {
  padding: 5rem 0;
  background: var(--light-gray);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.section-title p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.service-card {
  background: var(--white);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  border: 1px solid var(--border-gray);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.service-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.service-card ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.service-card li {
  padding: 0.5rem 0;
  color: var(--text-light);
  border-bottom: 1px solid var(--border-gray);
}

.service-card li:last-child {
  border-bottom: none;
}

.service-card li::before {
  content: '✓';
  color: var(--primary-color);
  font-weight: bold;
  margin-right: 0.5rem;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.service-link:hover {
  color: var(--primary-dark);
  transform: translateX(5px);
}

/* News Section */
.news {
  padding: 5rem 0;
  background: var(--white);
}

.news-card {
  background: var(--light-gray);
  border-radius: 1rem;
  padding: 2rem;
  border-left: 4px solid var(--primary-color);
}

.news-date {
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.news-content {
  margin-top: 1rem;
}

.news-content p {
  color: var(--text-light);
  line-height: 1.7;
}

/* About Section */
.about {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
}

.about-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.about h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

.about p {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
  line-height: 1.7;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: var(--white);
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: 0.5rem;
}

.footer-nav a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 1rem;
  text-align: center;
  color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-dark);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
  }
  
  .nav.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .service-card {
    padding: 1.5rem;
  }
}

/* Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--accent-color);
  z-index: 1001;
  transition: width 0.1s ease;
}