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

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --bg-dark: #0f172a;
  --bg-darker: #0a0e27;
  --bg-card: #1e293b;
  --bg-hover: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --accent: #06b6d4;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
  border-bottom: 1px solid var(--border-color);
  padding: 6rem 0;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 10vw, 3.5rem);
  margin-bottom: 0.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

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

/* Buttons */
.btn {
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  font-size: 0.95rem;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

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

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

/* Sections */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 3rem;
  font-weight: 700;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

/* About Section */
.about-section .about-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 3rem;
  text-align: justify;
}

.highlight-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  transition: all 0.3s ease;
}

.highlight-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

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

.highlight-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Experience Section */
.experience-section {
  background: rgba(30, 41, 59, 0.3);
}

.experience-item {
  background: var(--bg-card);
  border-left: 4px solid var(--primary-color);
  padding: 2rem;
  margin-bottom: 2rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.experience-item:hover {
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
  transform: translateX(5px);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.experience-header h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
}

.date {
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}

.company {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.experience-details {
  list-style: none;
  color: var(--text-secondary);
}

.experience-details li {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

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

/* Featured Work Section */
.featured-section {
  background: rgba(30, 41, 59, 0.3);
}

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  margin-bottom: 2rem;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.featured-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.2);
  transform: translateY(-5px);
}

.featured-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.featured-header h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  flex: 1;
}

.badge {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.featured-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.featured-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.tag {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent);
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.featured-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
}

/* Education Section */
.education-section {
  background: rgba(30, 41, 59, 0.3);
}

.education-item {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  padding: 2rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.education-item:hover {
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
  transform: translateX(5px);
}

.education-item h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.education-school {
  color: var(--accent);
  font-weight: 600;
}

.education-location {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.education-thesis {
  color: var(--text-secondary);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* Skills Section */
.skills-section {
  background: rgba(30, 41, 59, 0.3);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.skill-category {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.skill-category:hover {
  border-color: var(--primary-color);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
}

.skill-category h3 {
  color: var(--primary-color);
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid rgba(99, 102, 241, 0.25);
  transition: all 0.3s ease;
}

.skill-tag:hover {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

/* Volunteering Section */
.volunteering-section {
  background: rgba(30, 41, 59, 0.3);
}

.volunteering-item {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.volunteering-item:hover {
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
  transform: translateX(5px);
}

.volunteering-item h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.volunteer-year {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
}

/* Certifications Section */
.certifications-section {
  background: rgba(30, 41, 59, 0.3);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.cert-item {
  background: var(--bg-card);
  padding: 1.8rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.cert-item:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
}

.cert-item h3 {
  color: var(--accent);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.cert-item ul {
  list-style: none;
}

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

.cert-item li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* Languages Section */
.languages-section {
  background: rgba(30, 41, 59, 0.3);
}

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

.language-item {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all 0.3s ease;
}

.language-item:hover {
  border-color: var(--primary-color);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
  transform: translateY(-5px);
}

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

.language-item p {
  color: var(--accent);
  font-weight: 600;
}

/* Contact Section */
.contact-section {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
}

.contact-info {
  background: var(--bg-card);
  padding: 3rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  max-width: 600px;
  margin: 0 auto;
}

.contact-item {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.contact-label {
  color: var(--primary-color);
  font-weight: 600;
  margin-right: 0.5rem;
}

.contact-item a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-item a:hover {
  color: var(--primary-color);
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.contact-link {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.contact-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

/* Footer */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .hero {
    padding: 4rem 0;
  }

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

  .hero-subtitle {
    font-size: 1.1rem;
  }

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

  .btn {
    width: 100%;
    max-width: 250px;
  }

  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .experience-header {
    flex-direction: column;
  }

  .featured-header {
    flex-direction: column;
  }

  .featured-header h3 {
    flex: none;
  }

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

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

  .contact-info {
    padding: 2rem;
  }

  .contact-links {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .experience-item,
  .education-item,
  .featured-card {
    padding: 1.5rem;
  }

  .skill-tag {
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
  }

  .contact-info {
    padding: 1.5rem;
  }

  .contact-item {
    font-size: 0.95rem;
  }
}