/* CSS Variables for Theme Support */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-navbar: #2c3e50;
  --bg-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text-primary: #2c3e50;
  --text-secondary: #6c757d;
  --text-light: #ffffff;
  --accent-color: #667eea;
  --border-color: #dee2e6;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
  --card-bg: #ffffff;
  --skill-bg: #667eea;
  --skill-text: #ffffff;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-navbar: #0f0f0f;
  --bg-hero: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-light: #ffffff;
  --accent-color: #667eea;
  --border-color: #404040;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.4);
  --card-bg: #2d2d2d;
  --skill-bg: #667eea;
  --skill-text: #ffffff;
}

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

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: all 0.3s ease;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation Bar */
.navbar {
  background: var(--bg-navbar);
  color: var(--text-light);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(45deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links li a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

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

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-links li a:hover::after {
  width: 80%;
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: 2px solid var(--text-light);
  color: var(--text-light);
  padding: 0.5rem 1rem;
  border-radius: 25px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle:hover {
  background: var(--text-light);
  color: var(--bg-navbar);
  transform: translateY(-2px);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero {
  background: var(--bg-hero);
  color: var(--text-light);
  padding: 8rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s ease-out;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero .links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.hero .links a {
  color: var(--text-light);
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  border: 2px solid var(--text-light);
  border-radius: 25px;
  font-weight: 500;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.hero .links a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.hero .links a:hover::before {
  left: 100%;
}

.hero .links a:hover {
  background: var(--text-light);
  color: var(--bg-hero);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

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

/* Section Styles */
section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
  border-bottom: none;
}

h2 {
  color: var(--text-primary);
  margin-bottom: 2rem;
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 2px;
}

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

/* About Section */
#about p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.skills li {
  background: var(--skill-bg);
  color: var(--skill-text);
  padding: 0.8rem 1.5rem;
  border-radius: 25px;
  list-style: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s ease;
  cursor: default;
}

.skills li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* Experience Section */
.job {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 15px;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

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

.job h3 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.job p {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1rem;
}

.job ul {
  list-style: none;
  padding-left: 0;
}

.job ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

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

/* Projects Section */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), #764ba2);
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.project-card:hover::after {
  left: 100%;
}

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

.project-card h3 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
  font-size: 1.4rem;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-card h3::before {
  content: '🚀';
  font-size: 1.2rem;
  opacity: 0.7;
  transition: all 0.3s ease;
}

.project-card:hover h3::before {
  opacity: 1;
  transform: scale(1.2);
}

.project-card p:first-of-type {
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  z-index: 1;
}

.project-card p:last-of-type {
  color: var(--text-secondary);
  line-height: 1.6;
  position: relative;
  z-index: 1;
  margin-bottom: 1rem;
}

.project-links {
  position: relative;
  z-index: 1;
  margin-top: 1rem;
}

.project-link {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.project-link:hover {
  background: #764ba2;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* References Section */
.references-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.reference-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  text-align: center;
}

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

.reference-card h3 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.reference-card p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.reference-card p:first-of-type {
  font-weight: 500;
  color: var(--text-primary);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s ease;
}

.modal-content {
  background: var(--card-bg);
  margin: 5% auto;
  padding: 2rem;
  border-radius: 20px;
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  animation: slideIn 0.3s ease;
  box-shadow: var(--shadow-hover);
}

.close {
  color: var(--text-secondary);
  float: right;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  transition: all 0.3s ease;
}

.close:hover {
  color: var(--accent-color);
  transform: scale(1.1);
}

.modal h2 {
  color: var(--accent-color);
  margin-bottom: 1rem;
  text-align: left;
}

.modal h2::after {
  display: none;
}

.modal h3 {
  color: var(--text-primary);
  margin: 1.5rem 0 0.5rem 0;
  font-size: 1.3rem;
}

.modal p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.modal .tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.modal .tech-stack span {
  background: var(--skill-bg);
  color: var(--skill-text);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
}

.modal .project-links {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.modal .project-links a {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

.modal .project-links a:hover {
  background: #764ba2;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.modal .screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.modal .screenshot {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.modal .screenshot:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

.modal .screenshot img {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Contact Section */
#contact {
  text-align: center;
}

#contact p {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

#contact a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

#contact a:hover {
  text-decoration: underline;
  color: #764ba2;
}

/* Footer */
footer {
  background: var(--bg-navbar);
  color: var(--text-light);
  padding: 2rem 0;
  text-align: center;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

footer a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-navbar);
    flex-direction: column;
    padding: 2rem 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links li {
    margin: 1rem 0;
  }
  
  .nav-links li a {
    font-size: 1.1rem;
    padding: 1rem 2rem;
    display: block;
    text-align: center;
  }
  
  .theme-toggle {
    margin: 1rem auto;
    display: flex;
    justify-content: center;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  .hero .links {
    flex-direction: column;
    align-items: center;
  }
  
  .container {
    width: 95%;
    padding: 0 10px;
  }
  
  .project-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
  
  h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero {
    padding: 6rem 0 3rem;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .job, .project-card {
    padding: 1.5rem;
  }
  
  .nav-container {
    width: 95%;
    padding: 0 10px;
  }
}