:root {
  /* Brand Colors */
  --color-primary: #0A192F; /* Deep navy blue */
  --color-secondary: #FF6600; /* Bright construction orange */
  --color-white: #FFFFFF;
  --color-light-grey: #F5F7FA;
  --color-dark-grey: #333333;
  --color-text: #4A4A4A;
  
  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Layout & Spacing */
  --container-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Borders & Shadows */
  --border-radius: 8px;
  --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  --box-shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.2;
}

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

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

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

.section {
  padding: var(--spacing-xl) 0;
}

.section-bg-light {
  background-color: var(--color-light-grey);
}

.section-bg-dark {
  background-color: var(--color-primary);
  color: var(--color-white);
}
.section-bg-dark h2, .section-bg-dark h3, .section-bg-dark p {
  color: var(--color-white);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  font-size: 0.9rem;
}

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

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

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

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

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  padding: 10px 0;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  transition: var(--transition);
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-secondary);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  font-size: 1.2rem;
}

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

.nav-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-primary);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: var(--transition);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

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

/* Hero Section */
.hero {
  height: 100vh;
  min-height: 600px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  margin-top: 80px; /* Offset for header */
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(10, 25, 47, 0.9) 0%, rgba(10, 25, 47, 0.6) 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 700px;
}

.hero-title {
  font-size: 4rem;
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  animation: fadeUp 1s ease-out;
}

.hero-title span {
  color: var(--color-secondary);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-md);
  animation: fadeUp 1s ease-out 0.2s backwards;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
  animation: fadeUp 1s ease-out 0.4s backwards;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  color: var(--color-secondary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: inline-block;
  margin-bottom: var(--spacing-xs);
  position: relative;
}

.section-title {
  font-size: 2.5rem;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.service-card {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  border-bottom: 4px solid transparent;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: var(--color-light-grey);
  border-radius: 50%;
  transform: translate(30%, -30%);
  transition: var(--transition);
  z-index: 0;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--box-shadow-hover);
  border-bottom-color: var(--color-secondary);
}

.service-card:hover::before {
  background: var(--color-secondary);
  opacity: 0.1;
  transform: translate(20%, -20%) scale(1.5);
}

.service-icon {
  position: relative;
  z-index: 1;
  font-size: 2.5rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.service-card h3 {
  position: relative;
  z-index: 1;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.service-card p {
  position: relative;
  z-index: 1;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.service-link {
  position: relative;
  z-index: 1;
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.service-link:hover {
  color: var(--color-secondary);
}

/* Features / Strengths */
.features-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  align-items: center;
}

.features-image {
  flex: 1;
  min-width: 300px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

.features-content {
  flex: 1;
  min-width: 300px;
}

.feature-item {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.feature-icon {
  color: var(--color-secondary);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}

/* Stats Counter */
.stats-wrap {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  text-align: center;
}

.stat-item h3 {
  font-size: 3rem;
  color: var(--color-secondary);
  margin-bottom: 5px;
}

.stat-item p {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  group: hover;
}

.project-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(10,25,47,0.9), transparent);
  color: var(--color-white);
  transform: translateY(20px);
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  transform: translateY(0);
  opacity: 1;
}

.project-overlay h3 {
  color: var(--color-white);
  margin-bottom: 5px;
}

.project-overlay span {
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 0.9rem;
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: rgba(255,255,255,0.7);
  padding: var(--spacing-lg) 0 var(--spacing-sm);
}

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

.footer-widget h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  font-size: 1.2rem;
}

.footer-logo {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  align-items: flex-start;
}

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

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: var(--color-secondary);
  padding-left: 5px;
}

.footer-social {
  display: flex;
  gap: 15px;
  margin-top: var(--spacing-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  color: var(--color-white);
}

.footer-social a:hover {
  background: var(--color-secondary);
  transform: translateY(-3px);
}

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

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

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: 0.3s ease-in-out;
  }
  
  .nav-links.active {
    left: 0;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
}

/* Contact Page Specific */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.contact-info-card {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
}

.contact-icon {
  font-size: 2rem;
  color: var(--color-secondary);
}

.contact-form {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

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

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: var(--font-body);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-secondary);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* About Page Specific */
.about-hero {
  height: 40vh;
  min-height: 300px;
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  margin-top: 80px;
  position: relative;
}

.about-hero::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 0; 
  height: 0; 
  border-left: 20px solid transparent;
  border-right: 20px solid transparent;
  border-top: 20px solid var(--color-primary);
}

/* Page Headers (Services, Projects) */
.page-header {
  height: 30vh;
  min-height: 250px;
  background: linear-gradient(rgba(10, 25, 47, 0.9), rgba(10, 25, 47, 0.8)), url('https://images.unsplash.com/photo-1541888086425-d81bb19240f5?auto=format&fit=crop&q=80&w=2070') center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  margin-top: 80px;
}

.service-detail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  align-items: center;
}

.service-detail:nth-child(even) {
  flex-direction: row-reverse;
}

.service-detail-content {
  flex: 1;
  min-width: 300px;
}

.service-detail-image {
  flex: 1;
  min-width: 300px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

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

.service-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 10px;
}

.service-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-secondary);
  font-weight: bold;
}