/* ===================================
   QRS Steelworks - Modern CSS Design System
   =================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@400;500;600;700;800&display=swap');

/* ===================================
   CSS Custom Properties (Variables)
   =================================== */
:root {
  /* Colors */
  --primary-blue: #1a365d;
  --primary-blue-light: #2d4a7c;
  --primary-blue-dark: #0f1f3a;
  --accent-orange: #f97316;
  --accent-orange-light: #fb923c;
  --accent-orange-dark: #ea580c;
  
  /* Neutrals */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--gray-800);
  line-height: 1.6;
  background-color: var(--white);
  overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.0625rem;
  color: var(--gray-700);
}

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

a:hover {
  color: var(--accent-orange-dark);
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  transition: all var(--transition-base);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--accent-orange);
}

.logo-img {
  height: 120px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
  mix-blend-mode: multiply;
  filter: contrast(1.1);
  border-radius: 50px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--gray-700);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-orange);
  background-color: var(--gray-50);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--accent-orange);
  transition: transform var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.375rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  width: 1.75rem;
  height: 0.1875rem;
  background-color: var(--primary-blue);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(0.5rem, 0.5rem);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(0.5rem, -0.5rem);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 50%, var(--primary-blue-dark) 100%);
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out;
}

.hero-tagline {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  font-weight: 300;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-highlight {
  color: var(--accent-orange);
  font-weight: 600;
}

.cta-button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  background: var(--accent-orange);
  color: var(--white);
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-button:hover {
  background: var(--accent-orange-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  color: var(--white);
}

/* ===================================
   Section Styles
   =================================== */
.section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  max-width: 1280px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-orange-light));
  border-radius: 2px;
}

/* ===================================
   About Section
   =================================== */
.about {
  background: var(--gray-50);
}

.about-content {
  max-width: 900px;
  margin: 0 auto var(--spacing-xl);
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.stat-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-orange);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent-orange);
  font-family: var(--font-heading);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 1.125rem;
  color: var(--gray-600);
  font-weight: 500;
}

/* ===================================
   Services Section
   =================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.service-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-orange-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--gray-100);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.75rem;
}

.service-card h3 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.service-list {
  list-style: none;
  margin-top: var(--spacing-md);
}

.service-list li {
  padding: var(--spacing-xs) 0;
  color: var(--gray-600);
  position: relative;
  padding-left: var(--spacing-md);
}

.service-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-orange);
  font-weight: bold;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  background: var(--gray-50);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.contact-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
  color: var(--white);
}

.contact-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.contact-info {
  color: var(--gray-600);
  line-height: 1.8;
}

.contact-info a {
  display: block;
  margin: var(--spacing-xs) 0;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--primary-blue-dark);
  color: var(--white);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
}

.bbbee-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-light));
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
}

.footer-content p {
  color: rgba(255, 255, 255, 0.8);
  margin: var(--spacing-sm) 0;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero {
    min-height: 80vh;
  }
  
  .section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
  
  .stats-grid,
  .services-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .logo {
    font-size: 1.5rem;
  }
  
  .section {
    padding: var(--spacing-xl) var(--spacing-sm);
  }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
  text-align: center;
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

/* ===================================
   Projects Page Styles
   =================================== */
.projects-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 50%, var(--primary-blue-dark) 100%);
  position: relative;
  overflow: hidden;
  padding-top: 6rem;
}

.projects-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.projects-hero-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  position: relative;
  z-index: 1;
}

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

.projects-hero-tagline {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 300;
}

.projects-section {
  background: var(--gray-50);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.project-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-orange);
}

.project-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  position: relative;
}

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

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-info {
  padding: var(--spacing-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-name {
  font-size: 1.375rem;
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 700;
}

.project-description {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  flex-grow: 1;
}

.project-value {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-light));
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  font-size: 1rem;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--primary-blue) 100%);
  text-align: center;
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

.cta-content .cta-button {
  background: var(--accent-orange);
  color: var(--white);
}

.cta-content .cta-button:hover {
  background: var(--accent-orange-dark);
}

/* Responsive Projects */
@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-hero {
    min-height: 40vh;
    padding-top: 5rem;
  }
  
  .project-image {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .project-info {
    padding: var(--spacing-md);
  }
  
  .project-name {
    font-size: 1.25rem;
  }
}

/* ===================================
   Project Modal / Lightbox Styles
   =================================== */
.project-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius-xl);
  max-width: 1000px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--accent-orange);
  color: var(--white);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--accent-orange-dark);
  transform: scale(1.1);
}

.modal-slider {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--gray-900);
}

.slider-container {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
}

.slider-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: opacity 0.3s ease;
}

.image-counter {
  position: absolute;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  background: rgba(0, 0, 0, 0.7);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary-blue);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.slider-btn:hover {
  background: var(--white);
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-lg);
}

.slider-btn.prev {
  left: var(--spacing-md);
}

.slider-btn.next {
  right: var(--spacing-md);
}

.modal-info {
  padding: var(--spacing-xl);
}

.modal-info h3 {
  font-size: 1.75rem;
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

.modal-info p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.modal-value {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-light));
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  display: inline-block;
  font-size: 1.125rem;
}

/* View More Overlay on Project Cards */
.view-more {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: var(--white);
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
  text-align: center;
  font-weight: 600;
  font-size: 0.9375rem;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.project-card:hover .view-more {
  opacity: 1;
}

.project-image {
  position: relative;
}

/* Modal Responsive */
@media (max-width: 768px) {
  .slider-container {
    height: 300px;
  }
  
  .slider-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .slider-btn.prev {
    left: var(--spacing-sm);
  }
  
  .slider-btn.next {
    right: var(--spacing-sm);
  }
  
  .modal-info {
    padding: var(--spacing-lg);
  }
  
  .modal-info h3 {
    font-size: 1.375rem;
  }
  
  .modal-close {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 36px;
    height: 36px;
  }
}

@media (max-width: 480px) {
  .slider-container {
    height: 250px;
  }
  
  .modal-info {
    padding: var(--spacing-md);
  }
  
  .modal-info h3 {
    font-size: 1.25rem;
  }
  
  .modal-value {
    font-size: 1rem;
    padding: var(--spacing-xs) var(--spacing-md);
  }
}