:root {
  /* Primary Colors */
  --color-primary-white: #FFFFFF;
  --color-primary-black: #000000;
  
  /* Accent Colors */
  --color-accent-teal: #0A7EA4;
  --color-accent-teal-dark: #086280;
  --color-accent-gray: #F5F5F7;
  --color-accent-orange: #FF5722;
  --color-accent-orange-dark: #E64A19;
  
  /* Text Colors */
  --color-text-primary: #000000;
  --color-text-secondary: #333333;
  --color-text-muted: #666666;
  --color-text-light: #999999;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--color-primary-white);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* =========================================
   TYPOGRAPHY
   ========================================= */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary-black);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 2rem;
}

h4 {
  font-size: 1.5rem;
}

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

a {
  color: var(--color-accent-teal);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

.text-light {
  color: var(--color-text-light);
}

/* =========================================
   BUTTONS
   ========================================= */

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-orange-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-accent-teal-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

/* =========================================
   NAVIGATION
   ========================================= */

.navbar {
  background-color: var(--color-primary-white);
  padding: var(--spacing-sm) var(--spacing-md);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  height: 70px;
  width: auto;
}

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

.nav-link {
  color: var(--color-primary-black);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent-teal);
  background-color: rgba(10, 126, 164, 0.1);
}

/* =========================================
   SECTIONS
   ========================================= */

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

.section-alt {
  background-color: var(--color-accent-gray);
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--color-accent-teal);
  margin: var(--spacing-sm) auto 0;
}

/* =========================================
   HERO SECTION
   ========================================= */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--color-primary-white);
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: var(--spacing-sm);
}

.hero-content .subtitle {
  font-size: 1.5rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-md);
}

/* =========================================
   CARDS
   ========================================= */

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

.card {
  background-color: var(--color-primary-white);
  border: 1px solid var(--color-accent-gray);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

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

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary-black);
}

.card-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-accent-teal);
  font-weight: 600;
  margin-top: var(--spacing-sm);
}

.card-link:hover {
  color: var(--color-accent-orange);
}

/* =========================================
   FOOTER
   ========================================= */

.footer {
  background-color: var(--color-accent-gray);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  margin-top: var(--spacing-xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  list-style: none;
  margin-bottom: var(--spacing-sm);
}

.footer-link {
  color: var(--color-primary-black);
  font-weight: 500;
}

.footer-link:hover {
  color: var(--color-accent-teal);
}

.footer-copyright {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* =========================================
   UTILITY CLASSES
   ========================================= */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.py-1 { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-2 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-3 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-4 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

/* =========================================
   RESPONSIVE DESIGN
   ========================================= */

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .nav-menu {
    gap: var(--spacing-sm);
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
  }
}

/* Project Images */
.project-card {
  position: relative;
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
}

.project-gallery {
  position: relative;
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.project-image:hover {
  opacity: 0.9;
}

.gallery-indicator {
  position: absolute;
  bottom: 15px;
  right: 10px;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Technology Badges */
.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--spacing-sm);
}

.tech-badge {
  background-color: var(--color-accent-teal);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.tech-badge:hover {
  background-color: var(--color-accent-teal-dark);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
}

.modal-content {
  margin: auto;
  display: block;
  max-width: 90%;
  max-height: 90%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: var(--radius-md);
  user-select: none;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 40px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
  cursor: pointer;
  z-index: 1001;
}

.modal-close:hover,
.modal-close:focus {
  color: #bbb;
}

.modal-prev,
.modal-next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: auto;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 30px;
  transition: 0.3s;
  border-radius: 0 3px 3px 0;
  user-select: none;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1001;
}

.modal-prev {
  left: 20px;
  border-radius: 3px 0 0 3px;
}

.modal-next {
  right: 20px;
  border-radius: 0 3px 3px 0;
}

.modal-prev:hover,
.modal-next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.modal-counter {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 16px;
  background-color: rgba(0, 0, 0, 0.7);
  padding: 8px 16px;
  border-radius: 20px;
  z-index: 1001;
}