:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #a855f7;
  --accent: #06b6d4;
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 12px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --text: #f1f5f9;
  --text-light: #94a3b8;
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --border: #334155;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
  .navbar {
    background: rgba(15, 23, 42, 0.8);
  }
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo img {
  height: 40px;
  width: auto;
  transition: var(--transition);
}

.logo-dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  .logo-light {
    display: none;
  }
  .logo-dark {
    display: block;
  }
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  position: relative;
}

.theme-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: rotate(15deg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: var(--transition);
}

.sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

.moon-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0);
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

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

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

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-light);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.code-block {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
}

.code-header {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.code-block pre {
  overflow-x: auto;
}

.code-block code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 14px;
  line-height: 1.8;
}

.code-block .keyword { color: #c084fc; }
.code-block .function { color: #60a5fa; }
.code-block .arrow { color: #94a3b8; }
.code-block .property { color: #f472b6; }
.code-block .string { color: #34d399; }

/* Section Styles */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Services */
.services {
  background: var(--bg-alt);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--bg);
  padding: 40px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.service-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.service-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-light);
  line-height: 1.7;
}

/* About */
.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text {
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.8;
  font-size: 17px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.feature {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-placeholder svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

/* Portfolio */
.portfolio {
  background: var(--bg-alt);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.portfolio-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.portfolio-image {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-image svg {
  width: 64px;
  height: 64px;
  color: rgba(255, 255, 255, 0.8);
}

.portfolio-content {
  padding: 28px;
}

.portfolio-content h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.portfolio-content p {
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.6;
}

.tech-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tech-tags span {
  background: var(--bg-alt);
  color: var(--text-light);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  border: 1px solid var(--border);
}

/* Contact */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 16px;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-item svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 18px;
  margin-bottom: 8px;
}

.contact-item p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Footer */
.footer {
  background: var(--bg-alt);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--text-light);
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-column h4 {
  font-size: 16px;
  margin-bottom: 20px;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
}

.footer-column a:hover {
  color: var(--primary);
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  width: 44px;
  height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-links a:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.social-links svg {
  width: 20px;
  height: 20px;
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  color: var(--text-light);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-container,
  .about-container,
  .contact-container {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .services-grid,
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 32px;
    gap: 24px;
    transform: translateX(100%);
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 42px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .services-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 36px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 120px 0 60px;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  section {
    padding: 60px 0;
  }
}