/* CSS Custom Properties */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #f59e0b;
  --accent: #10b981;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background: #ffffff;
  --background-secondary: #f9fafb;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  
  /* Dark mode colors */
  --dark-primary: #6366f1;
  --dark-background: #0f172a;
  --dark-surface: #1e293b;
  --dark-text: #f8fafc;
  --dark-text-secondary: #cbd5e1;
  --dark-border: #334155;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
  
  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.25s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-lg);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-full);
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

/* Background Animation */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
}

.shape {
  position: absolute;
  border-radius: var(--radius-full);
  opacity: 0.1;
  animation: float 20s infinite linear;
}

.shape-1 {
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 60px;
  height: 60px;
  background: var(--gradient-secondary);
  top: 60%;
  right: 20%;
  animation-delay: -5s;
}

.shape-3 {
  width: 80px;
  height: 80px;
  background: var(--gradient-accent);
  bottom: 30%;
  left: 20%;
  animation-delay: -10s;
}

.shape-4 {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  top: 40%;
  right: 40%;
  animation-delay: -15s;
}

.shape-5 {
  width: 120px;
  height: 120px;
  background: var(--gradient-secondary);
  bottom: 20%;
  right: 10%;
  animation-delay: -7s;
}

@keyframes float {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  33% {
    transform: translateY(-30px) rotate(120deg);
  }
  66% {
    transform: translateY(-60px) rotate(240deg);
  }
  100% {
    transform: translateY(0px) rotate(360deg);
  }
}

#particleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding-top: 80px;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.profile-image {
  width: 300px;
  height: 300px;
  border-radius: var(--radius-full);
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 4px solid white;
  position: relative;
  z-index: 2;
}

.image-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 320px;
  height: 320px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0.3;
  filter: blur(40px);
  transform: translate(-50%, -50%);
  z-index: 1;
  animation: pulse-glow 3s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
  0% { transform: translate(-50%, -50%) scale(1); }
  100% { transform: translate(-50%, -50%) scale(1.1); }
}

.hero-text {
  text-align: left;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.greeting {
  display: block;
  font-size: 1.5rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

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

.typing-cursor {
  color: var(--primary);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  min-height: 2rem;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.hero-stats {
  display: flex;
  gap: var(--space-xl);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-light);
  font-size: 0.9rem;
  animation: bounce 2s infinite;
}

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

.wheel {
  width: 3px;
  height: 6px;
  background: var(--text-light);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 20px; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

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

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

.btn-secondary:hover {
  background: var(--background-secondary);
  transform: translateY(-2px);
}

.btn-icon {
  transition: transform var(--transition-normal);
}

.btn:hover .btn-icon {
  transform: translateX(2px);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* About Section */
.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: white;
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-light);
}

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

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  color: white;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Skills Section */
.skills {
  background: var(--background-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
}

.skill-category {
  background: white;
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.skill-category h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--background-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.skill-item:hover {
  background: var(--primary);
  color: white;
  transform: translateX(4px);
}

.skill-icon {
  font-size: 1.2rem;
}

.skill-name {
  font-weight: 500;
}

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

.project-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-light);
}

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

.project-image {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

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

.project-links {
  display: flex;
  gap: var(--space-sm);
}

.project-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: white;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

.project-content {
  padding: var(--space-xl);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--background-secondary);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

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

/* Certifications Section */
.certifications {
  background: var(--background-secondary);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.certification-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-light);
}

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

.cert-image {
  height: 150px;
  overflow: hidden;
}

.cert-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cert-content {
  padding: var(--space-xl);
}

.cert-badge {
  margin-bottom: var(--space-sm);
}

.badge-text {
  padding: var(--space-xs) var(--space-sm);
  background: var(--gradient-primary);
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.cert-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.cert-provider {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.cert-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: white;
  flex-shrink: 0;
}

.contact-details h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

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

.contact-form {
  background: white;
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-sm);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: var(--space-xl) 0;
}

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

.footer-left p {
  margin-bottom: var(--space-xs);
}

.student-id {
  color: var(--text-light);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

/* Animations */
.reveal-up {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-lg);
    padding: var(--space-lg) 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .profile-image {
    width: 250px;
    height: 250px;
  }
  
  .image-glow {
    width: 270px;
    height: 270px;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .greeting {
    font-size: 1.2rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .projects-grid,
  .about-cards,
  .certifications-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .profile-image {
    width: 200px;
    height: 200px;
  }
  
  .image-glow {
    width: 220px;
    height: 220px;
  }
}