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

:root {
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #10b981;
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --bg-card: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  transition: width 0.3s ease;
}

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

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

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--bg-darker);
}

.hero-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-image {
  margin-bottom: 2rem;
}

.hero-image img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 4px solid var(--primary-color);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.3);
  transition: transform 0.3s ease;
}

.hero-image img:hover {
  transform: scale(1.05);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

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

.btn {
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

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

.hero-info {
  display: flex;
  gap: 2rem;
  justify-content: center;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.hero-info span {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Section Styles */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* About Section */
.about {
  background: var(--bg-card);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Experience Section */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--gradient);
}

.timeline-item {
  margin-bottom: 3rem;
  position: relative;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  padding-right: 2rem;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding-left: 2rem;
}

.timeline-dot {
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--gradient);
  border-radius: 50%;
  top: 0;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -8px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -8px;
}

.timeline-content {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.timeline-content h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.timeline-content h4 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.timeline-date {
  background: var(--gradient);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  display: inline-block;
  margin-bottom: 1rem;
}

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

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

.timeline-content li::before {
  content: "▸";
  color: var(--primary-color);
  position: absolute;
  left: 0;
}

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

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

.skill-category {
  background: var(--bg-dark);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.skill-category h3 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.tag {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary-color);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid rgba(99, 102, 241, 0.2);
  transition: all 0.3s ease;
}

.tag:hover {
  background: rgba(99, 102, 241, 0.2);
  transform: translateY(-2px);
}

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

.project-card {
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

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

.project-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.3s ease;
}

.project-link:hover {
  color: var(--secondary-color);
}

/* Awards Section */
.awards {
  background: var(--bg-card);
}

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

.award-card {
  background: var(--bg-dark);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.award-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.award-icon {
  font-size: 3rem;
  color: #fbbf24;
  margin-bottom: 1rem;
}

.award-card h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

/* Education Section */
.education-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.education-icon {
  font-size: 3rem;
  color: var(--primary-color);
  flex-shrink: 0;
}

.education-content h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.education-content h4 {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.education-date {
  background: var(--gradient);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  display: inline-block;
  margin-bottom: 1rem;
}

.education-details {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.gpa {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-color);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

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

/* Contact Section */
.contact {
  background: var(--bg-card);
}

.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: var(--bg-darker);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--bg-darker);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-info {
    flex-direction: column;
    gap: 1rem;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 3rem !important;
    padding-right: 0 !important;
  }

  .timeline-dot {
    left: 12px !important;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .awards-grid {
    grid-template-columns: 1fr;
  }

  .education-card {
    flex-direction: column;
    text-align: center;
  }

  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }

  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-image img {
    width: 150px;
    height: 150px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}