/* ============================================
   GS PROCUREMENT & SERVICES INDUSTRY
   Main Stylesheet
   ============================================ */

/* CSS Variables - Light Mode (Default) */
:root {
  /* Brand Colors */
  --primary-color: #0D7C66;
  --primary-dark: #0A5E4E;
  --primary-light: #15B392;
  --secondary-color: #D4A853;
  --accent-color: #E8B931;
  
  /* Neutral Colors */
  --text-color: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --bg-color: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --border-color: #dee2e6;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  --shadow-xl: 0 12px 40px rgba(0,0,0,0.2);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  
  /* Typography */
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Open Sans', sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  
  /* Header Height */
  --header-height: 80px;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-secondary);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.25rem); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-light);
}

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

a:hover {
  color: var(--primary-light);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(13, 124, 102, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13, 124, 102, 0.4);
  color: #fff;
}

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

.btn-secondary:hover {
  background: var(--primary-color);
  color: #fff;
}

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

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-color);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.logo img {
  height: 55px;
  width: auto;
}

.logo-white {
  display: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-sm);
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-color);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 70%;
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.control-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-secondary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-color);
}

.control-btn:hover {
  background: var(--primary-color);
  color: #fff;
}

/* Language Selector */
.lang-selector {
  display: flex;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 3px;
}

.lang-btn {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-muted);
}

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

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-color);
  transition: all var(--transition-normal);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

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

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

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(13, 124, 102, 0.92) 0%, rgba(10, 94, 78, 0.95) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-xl);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  backdrop-filter: blur(10px);
}

.hero h1 {
  color: #fff;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255,255,255,0.2);
}

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

.stat-number {
  font-family: var(--font-primary);
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: var(--spacing-xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
}

.section-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(13, 124, 102, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

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

.about-content h2 {
  margin-bottom: var(--spacing-md);
}

.about-text {
  margin-bottom: var(--spacing-md);
}

/* Mission & Vision Cards */
.mv-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.mv-card {
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-color);
  transition: all var(--transition-normal);
}

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

.mv-card h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mv-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Values Section */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.value-card {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--bg-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.value-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.value-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--spacing-sm);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.75rem;
}

.value-card h4 {
  margin-bottom: var(--spacing-xs);
}

.value-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.service-card {
  background: var(--bg-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.service-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

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

.service-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
}

.service-content {
  padding: var(--spacing-md);
}

.service-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  margin-top: -45px;
  position: relative;
  box-shadow: var(--shadow-md);
}

.service-content h3 {
  margin-bottom: var(--spacing-xs);
}

.service-content p {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary-color);
}

.service-link i {
  transition: transform var(--transition-fast);
}

.service-link:hover i {
  transform: translateX(5px);
}

/* ============================================
   GALLERY SECTION
   ============================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(13, 124, 102, 0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-md);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay h4 {
  color: #fff;
  margin-bottom: var(--spacing-xs);
}

.gallery-overlay p {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-lg);
}

.contact-info {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  color: #fff;
}

.contact-info h3 {
  color: #fff;
  margin-bottom: var(--spacing-sm);
}

.contact-info > p {
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--spacing-md);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-sm);
}

.contact-item i {
  width: 45px;
  height: 45px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-item-content h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.contact-item-content p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 0;
  font-size: 0.95rem;
}

.contact-item-content a {
  color: rgba(255,255,255,0.85);
}

.contact-item-content a:hover {
  color: #fff;
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--bg-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.contact-form-wrapper h3 {
  margin-bottom: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-sm);
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.form-group label .required {
  color: #e74c3c;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-secondary);
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-color);
  color: var(--text-color);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(13, 124, 102, 0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.form-message {
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  display: none;
}

.form-message.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  display: block;
}

.form-message.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  display: block;
}

/* Map Container */
.map-container {
  margin-top: var(--spacing-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 300px;
  box-shadow: var(--shadow-md);
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--primary-dark);
  color: #fff;
  padding-top: var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-brand p {
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.footer-brand .logo img {
  height: 50px;
  margin-bottom: var(--spacing-sm);
}

.footer h4 {
  color: #fff;
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255,255,255,0.75);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: #fff;
  padding-left: 5px;
}

.footer-contact p {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.footer-contact i {
  color: var(--primary-light);
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  margin-bottom: 0;
}

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

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease-out;
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s ease-out;
}

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

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.bg-light { background-color: var(--bg-secondary); }
.bg-dark { background-color: var(--primary-dark); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--bg-secondary);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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