/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --secondary-color: #64748b;
  --text-color: #1e293b;
  --text-light: #64748b;
  --bg-color: #ffffff;
  --bg-light: #f8fafc;
  --border-color: #e2e8f0;
  --accent-color: #3b82f6;
  --font-family-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --transition: all 0.3s ease;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);
}

body {
  font-family: var(--font-family-body);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

html {
  scroll-behavior: smooth;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  font-family: var(--font-family-heading);
}

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

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -0.5rem;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

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

/* Hamburger menu */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

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

/* Hero section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-light) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 1rem;
  line-height: 1.1;
  font-family: var(--font-family-heading);
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 1.5rem;
  font-family: var(--font-family-body);
  letter-spacing: 0.025em;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary,
.btn-secondary {
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: #1d4ed8;
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

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

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-color);
  font-family: var(--font-family-heading);
}

/* About section */
.about {
  background-color: var(--bg-light);
}

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

.about-content p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Experience section */
.experience-timeline {
  max-width: 1000px;
  margin: 0 auto;
}

.experience-item {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.experience-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.experience-header {
  margin-bottom: 1.5rem;
}

.experience-header h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.5rem;
  font-family: var(--font-family-heading);
}

.company-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.company {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--primary-color);
}

.duration {
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
}

.experience-details {
  list-style: none;
  padding: 0;
}

.experience-details li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-light);
  line-height: 1.6;
}

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

.contact-location {
  color: var(--text-light);
  font-weight: 500;
}

/* Skills section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background-color: white;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.skill-category h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-family: var(--font-family-heading);
}

.skill-category ul {
  list-style: none;
}

.skill-category li {
  padding: 0.5rem 0;
  color: var(--text-light);
  border-bottom: 1px solid var(--border-color);
}

.skill-category li:last-child {
  border-bottom: none;
}

/* Education section */
.education {
  background-color: var(--bg-color);
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.education-item {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.education-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

.education-header h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-color);
  font-family: var(--font-family-heading);
  flex: 1;
}

.education-year {
  background-color: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
}

.education-details {
  color: var(--text-light);
  line-height: 1.6;
}

.education-details strong {
  color: var(--text-color);
}

/* Blog preview section */
.blog-preview {
  background-color: var(--bg-light);
}

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

.blog-card {
  background-color: white;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.blog-card h3 {
  margin-bottom: 1rem;
}

.blog-card h3 a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  font-family: var(--font-family-heading);
}

.blog-card h3 a:hover {
  color: var(--primary-color);
}

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

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

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

/* Contact section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.7;
}

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

.contact-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.contact-link:hover {
  color: var(--accent-color);
}

.contact-form {
  background-color: white;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
footer {
  background-color: var(--text-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 4rem;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow);
    padding: 2rem 0;
    z-index: 999;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .container {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 6rem 0 2rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .contact-form {
    padding: 1.5rem;
  }
}
/* Additional responsive styles for new sections */
@media (max-width: 768px) {
  .education-grid {
    grid-template-columns: 1fr;
  }
  
  .experience-item,
  .education-item {
    padding: 1.5rem;
  }
  
  .company-info,
  .education-header {
    flex-direction: column;
    align-items: flex-start;
  }
}