/* CSS Variables for Theme */
:root {
  /* Light theme colors */
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --bg-color: #ffffff;
  --surface-color: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

/* Dark theme colors */
[data-theme="dark"] {
  --primary-color: #60a5fa;
  --primary-hover: #3b82f6;
  --secondary-color: #94a3b8;
  --accent-color: #fbbf24;
  --bg-color: #0f172a;
  --surface-color: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 3rem;
}

.section-header {
  margin-bottom: 4rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-large);
}

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

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all 0.3s ease;
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.95);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo a {
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.theme-btn {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 0.25rem;
}

.bar {
  width: 1.5rem;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--surface-color) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
  z-index: -1;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-social {
  display: flex;
  gap: 1rem;
}

.hero-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--surface-color);
  color: var(--text-secondary);
  border-radius: 0.5rem;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.hero-social a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.hero-image {
  position: relative;
  height: 400px;
}

.floating-elements {
  position: relative;
  width: 100%;
  height: 100%;
}

.floating-element {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  font-size: 1.5rem;
  color: var(--primary-color);
  animation: float 6s ease-in-out infinite;
  box-shadow: var(--shadow-medium);
}

.floating-element.python {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-element.ai {
  top: 50%;
  right: 20%;
  animation-delay: 2s;
}

.floating-element.code {
  bottom: 30%;
  left: 30%;
  animation-delay: 4s;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.wheel {
  width: 2px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 1px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0% { opacity: 0; top: 8px; }
  50% { opacity: 1; }
  100% { opacity: 0; top: 24px; }
}

/* About Section */
.about {
  padding: 6rem 0;
  background: var(--surface-color);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.resume-download {
  margin-top: 2rem;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

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

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-item p {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Skills Section */
.skills {
  padding: 6rem 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

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

.skill-category h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.skills-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.skill-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
  width: 2rem;
}

.skill-item span {
  flex: 1;
  font-weight: 500;
  color: var(--text-primary);
}

.skill-level {
  width: 100px;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 3px;
  transition: width 2s ease;
}

/* Projects Section */
.projects {
  padding: 6rem 0;
  background: var(--surface-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--bg-color);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-large);
}

.project-image {
  height: 200px;
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: white;
  color: var(--text-primary);
  border-radius: 50%;
  text-decoration: none;
  font-size: 1.25rem;
  transition: all 0.3s ease;
}

.project-link:hover {
  transform: scale(1.1);
  background: var(--primary-color);
  color: white;
}

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tech-tag {
  background: var(--surface-color);
  color: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
}

.project-toggle {
  background: none;
  border: none;
  color: var(--primary-color);
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.project-toggle:hover {
  transform: translateX(5px);
}

.project-toggle i {
  transition: transform 0.3s ease;
}

.project-toggle.active i {
  transform: rotate(180deg);
}

.project-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.project-details.active {
  max-height: 300px;
}

.project-details h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.project-details li {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  padding-left: 1rem;
  position: relative;
}

.project-details li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

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

/* Blog Section */
.blog {
  padding: 6rem 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.blog-card {
  background: var(--surface-color);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

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

.blog-image {
  height: 200px;
  background: var(--gradient-accent);
}

.blog-content {
  padding: 1.5rem;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

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

.blog-category {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
}

.blog-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.blog-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.blog-link:hover {
  transform: translateX(5px);
}

/* Contact Section */
.contact {
  padding: 6rem 0;
  background: var(--surface-color);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-large);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  font-size: 1.25rem;
}

.contact-details h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.contact-details p {
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-color);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all 0.3s ease;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: all 0.3s ease;
  background: var(--surface-color);
  padding: 0 0.25rem;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -0.5rem;
  left: 0.75rem;
  font-size: 0.875rem;
  color: var(--primary-color);
}

.btn-loading {
  display: none;
}

.contact-form .btn.loading .btn-text {
  display: none;
}

.contact-form .btn.loading .btn-loading {
  display: block;
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: var(--bg-color);
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.1);
  color: var(--bg-color);
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .nav-container {
    padding: 1rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    transform: translateY(100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .about-stats {
    flex-direction: row;
    justify-content: space-around;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .about-stats {
    flex-direction: column;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* Smooth Scrolling for Safari */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .floating-element {
    animation: none;
  }
  
  .wheel {
    animation: none;
  }
}