:root {
  --primary-blue: #1e3a8a;
  --secondary-blue: #3b82f6;
  --light-blue: #dbeafe;
  --dark-gray: #1f2937;
  --medium-gray: #4b5563;
  --light-gray: #e5e7eb;
  --text-gray: #6b7280;
  --bg-gray: #f9fafb;
  --white: #ffffff;
  --max-width: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--dark-gray);
  background-color: var(--bg-gray);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Styles */
header {
  background-color: var(--white);
  border-bottom: 1px solid var(--light-gray);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

nav {
  padding: 0.75rem 0;
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-blue);
  text-decoration: none;
}

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

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

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

/* Hero Section */
.hero {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
  color: var(--white);
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero .subtitle {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.hero .description {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
  opacity: 0.85;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Button Styles */
.btn {
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
}

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

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

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

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

/* Section Styles */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--dark-gray);
}

/* Current Focus Section */
.current-focus {
  padding: 4rem 0;
  background-color: var(--white);
}

.focus-card {
  background-color: var(--bg-gray);
  border-radius: 0.75rem;
  padding: 2.5rem;
  border: 2px solid var(--secondary-blue);
  max-width: 800px;
  margin: 0 auto;
}

.focus-card h3 {
  color: var(--primary-blue);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.focus-card > p {
  color: var(--text-gray);
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

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

.focus-details li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--secondary-blue);
  font-weight: bold;
}

/* Projects Section */
.projects {
  padding: 4rem 0;
  background-color: var(--bg-gray);
}

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

.project-card {
  background-color: var(--bg-gray);
  border-radius: 0.75rem;
  padding: 2rem;
  transition: all 0.3s ease;
  border: 1px solid var(--light-gray);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border-color: var(--secondary-blue);
}

.project-card h3 {
  color: var(--primary-blue);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

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

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

.project-card p {
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

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

.project-link {
  color: var(--secondary-blue);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.3s ease;
}

.project-link:hover {
  gap: 0.75rem;
}

/* Projects Showcase Section */
.projects-showcase {
  padding: 4rem 0;
  background-color: var(--white);
}

.projects-showcase .projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.projects-showcase .project-card {
  background-color: var(--bg-gray);
  border-radius: 1rem;
  padding: 2.5rem;
  transition: all 0.3s ease;
  border: 2px solid var(--light-gray);
  height: fit-content;
}

.projects-showcase .project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--secondary-blue);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  gap: 1rem;
}

.project-header h3 {
  margin: 0;
  flex-grow: 1;
}

.project-header h3 a {
  color: var(--primary-blue);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
}

.project-header h3 a:hover {
  color: var(--secondary-blue);
}

.project-status {
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-completed {
  background-color: #d1fae5;
  color: #065f46;
}

.status-in-progress {
  background-color: #dbeafe;
  color: #1e40af;
}

.status-planning {
  background-color: #fef3c7;
  color: #92400e;
}

.project-description {
  margin-bottom: 1.5rem;
}

.project-description p {
  color: var(--text-gray);
  line-height: 1.7;
  font-size: 1rem;
}

.projects-showcase .tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.projects-showcase .tech-tag {
  background-color: var(--light-blue);
  color: var(--primary-blue);
  padding: 0.375rem 0.875rem;
  border-radius: 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.project-achievements {
  margin-bottom: 2rem;
}

.project-achievements h4 {
  color: var(--dark-gray);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.project-achievements ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.project-achievements li {
  color: var(--medium-gray);
  font-size: 0.95rem;
  line-height: 1.6;
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.5rem;
}

.project-achievements li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary-blue);
  font-weight: bold;
}

.projects-showcase .project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--light-gray);
}

.projects-showcase .project-link {
  color: var(--secondary-blue);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.projects-showcase .project-link:hover {
  background-color: var(--light-blue);
  transform: translateY(-1px);
}

.projects-showcase .project-link svg {
  flex-shrink: 0;
}

.demo-link {
  background-color: var(--secondary-blue);
  color: var(--white) !important;
}

.demo-link:hover {
  background-color: var(--primary-blue) !important;
  color: var(--white) !important;
}

.page-description {
  font-size: 1.125rem;
  color: var(--text-gray);
  margin-top: 1rem;
  line-height: 1.6;
}

/* Blog Section */
.blog {
  background-color: var(--bg-gray);
}

/* Blog Header */
.blog-header {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
  color: var(--white);
  padding: 4rem 0;
}

.blog-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.blog-intro {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.category-filter {
  margin-top: 2rem;
}

.category-filter h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  opacity: 0.9;
}

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

.category-link {
  color: var(--white);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 2rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
  font-weight: 500;
}

.category-link:hover,
.category-link.active {
  background-color: var(--white);
  color: var(--primary-blue);
  border-color: var(--white);
}

/* Blog Content */
.blog-content {
  padding: 4rem 0;
  background-color: var(--white);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2.5rem;
}

.blog-card {
  background-color: var(--bg-gray);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--light-gray);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  border-color: var(--secondary-blue);
}

.blog-card-header {
  padding: 1.5rem 1.5rem 0;
}

.post-category {
  margin-bottom: 0.75rem;
}

.category-badge {
  padding: 0.5rem 1rem;
  border-radius: 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.category-security-research {
  background-color: #fef2f2;
  color: #dc2626;
}

.category-drone-security {
  background-color: #eff6ff;
  color: #2563eb;
}

.category-technical-deep-dives {
  background-color: #f0fdf4;
  color: #16a34a;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-gray);
  font-size: 0.875rem;
}

.reading-time {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.blog-card-content {
  padding: 0 1.5rem;
  flex-grow: 1;
}

.blog-card-content h2 {
  margin: 1rem 0;
  font-size: 1.5rem;
  line-height: 1.4;
}

.blog-card-content h2 a {
  color: var(--dark-gray);
  text-decoration: none;
}

.blog-card-content h2 a:hover {
  color: var(--primary-blue);
}

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

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

.tag {
  color: var(--secondary-blue);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.tag:hover {
  color: var(--primary-blue);
}

.blog-card-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--light-gray);
}

.read-more {
  color: var(--secondary-blue);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.read-more:hover {
  color: var(--primary-blue);
}

/* Blog Post Single */
.blog-post {
  padding: 2rem 0;
  background-color: var(--white);
}

.post-header {
  max-width: 800px;
  margin: 0 auto 2rem;
  text-align: center;
  position: static;
}

.post-title {
  font-size: 2rem;
  margin: 0.5rem 0 1rem;
  color: var(--dark-gray);
  font-weight: 800;
  line-height: 1.2;
  position: static;
}

.post-description {
  font-size: 1.25rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.author-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.author-details {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.author-name {
  font-weight: 600;
  color: var(--dark-gray);
}

.author-title {
  color: var(--text-gray);
  font-size: 0.875rem;
}

.post-details {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  color: var(--text-gray);
}

.publish-date {
  font-weight: 500;
}

.reading-time {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.social-sharing {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.share-label {
  color: var(--text-gray);
  font-weight: 500;
  margin-right: 0.5rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.share-btn.twitter {
  background-color: #1da1f2;
  color: var(--white);
}

.share-btn.linkedin {
  background-color: #0077b5;
  color: var(--white);
}

.share-btn.reddit {
  background-color: #ff4500;
  color: var(--white);
}

.share-btn.copy-link {
  background-color: var(--medium-gray);
  color: var(--white);
}

.share-btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.post-content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
  font-size: 1.125rem;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin: 2rem 0 1rem;
  color: var(--dark-gray);
}

.post-content h2 {
  font-size: 1.875rem;
}

.post-content h3 {
  font-size: 1.5rem;
}

.post-content h4 {
  font-size: 1.25rem;
}

.post-content p {
  margin-bottom: 1.5rem;
  color: var(--medium-gray);
}

.post-content code {
  background-color: var(--bg-gray);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9em;
}

.post-content pre {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-footer {
  max-width: 800px;
  margin: 3rem auto 0;
  border-top: 2px solid var(--light-gray);
  padding-top: 2rem;
  background-color: var(--white);
  color: var(--dark-gray);
}

.post-footer .post-tags {
  margin-bottom: 3rem;
  background-color: var(--white);
}

.tags-label {
  color: var(--text-gray);
  font-weight: 500;
  margin-right: 1rem;
}

.related-posts h3 {
  color: var(--dark-gray);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

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

.related-post {
  background-color: var(--bg-gray);
  padding: 1.5rem;
  border-radius: 0.75rem;
  border: 1px solid var(--light-gray);
  transition: all 0.3s ease;
}

.related-post:hover {
  border-color: var(--secondary-blue);
  transform: translateY(-2px);
}

.related-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-gray);
}

.related-post h4 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.related-post h4 a {
  color: var(--dark-gray);
  text-decoration: none;
}

.related-post h4 a:hover {
  color: var(--primary-blue);
}

.related-post p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.5;
}

.no-posts {
  text-align: center;
  padding: 4rem 0;
}

.no-posts h3 {
  color: var(--dark-gray);
  margin-bottom: 1rem;
}

.no-posts p {
  color: var(--text-gray);
}

/* About Page Styles */
.about-intro {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
  color: var(--white);
  padding: 3rem 0;
  margin-bottom: 3rem;
}

.about-intro .container {
  max-width: 800px;
}

.about-intro p {
  font-size: 1.25rem;
  line-height: 1.7;
  margin: 0;
  opacity: 0.95;
}

.content h2 {
  color: var(--primary-blue);
  font-size: 2rem;
  margin: 3rem 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--secondary-blue);
}

.content h3 {
  color: var(--dark-gray);
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

.content h4 {
  color: var(--medium-gray);
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
  font-weight: 600;
}

/* Professional Timeline */
.professional-timeline {
  position: relative;
  padding-left: 2rem;
  margin: 2rem 0;
}

.professional-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--secondary-blue), var(--primary-blue));
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.75rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--secondary-blue);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--secondary-blue);
}

.timeline-item strong {
  color: var(--primary-blue);
  font-size: 1.125rem;
  display: block;
  margin-bottom: 0.5rem;
}

/* Learning in Public Section */
.learning-timeline {
  background-color: var(--bg-gray);
  padding: 2rem;
  border-radius: 1rem;
  margin: 2rem 0;
  border-left: 5px solid var(--secondary-blue);
}

.learning-quarter {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--light-gray);
}

.learning-quarter:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.learning-quarter h4 {
  color: var(--secondary-blue);
  font-size: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.learning-quarter h4::before {
  content: '📚';
  font-size: 1.5rem;
}

.learning-insights {
  background-color: var(--white);
  padding: 1.5rem;
  border-radius: 0.75rem;
  margin: 1rem 0;
  border-left: 4px solid var(--secondary-blue);
}

.learning-insights strong {
  color: var(--primary-blue);
  display: block;
  margin-bottom: 0.5rem;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

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

.contact-card:hover {
  border-color: var(--secondary-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.contact-card h4 {
  color: var(--primary-blue);
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--white);
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--dark-gray);
  margin-bottom: 0.75rem;
  transition: all 0.3s ease;
  border: 1px solid var(--light-gray);
}

.contact-link:hover {
  background-color: var(--light-blue);
  border-color: var(--secondary-blue);
  color: var(--primary-blue);
}

.contact-link:last-child {
  margin-bottom: 0;
}

.contact-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--white);
  font-size: 0.875rem;
  flex-shrink: 0;
}

.contact-icon.email { background-color: #ea4335; }
.contact-icon.github { background-color: #333; }
.contact-icon.linkedin { background-color: #0077b5; }
.contact-icon.twitter { background-color: #1da1f2; }
.contact-icon.orcid { background-color: #a6ce39; }

.contact-details {
  flex-grow: 1;
}

.contact-details strong {
  display: block;
  color: var(--dark-gray);
  margin-bottom: 0.25rem;
}

.contact-details em {
  color: var(--text-gray);
  font-size: 0.9rem;
  font-style: normal;
}

/* Research Interests */
.research-area {
  background-color: var(--bg-gray);
  padding: 1.5rem;
  border-radius: 0.75rem;
  margin: 1.5rem 0;
  border-left: 4px solid var(--secondary-blue);
}

.research-area h4 {
  color: var(--primary-blue);
  margin-top: 0;
  margin-bottom: 1rem;
}

.research-area ul {
  margin: 0;
  padding-left: 1.25rem;
}

.research-area li {
  color: var(--medium-gray);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Skills and expertise lists */
.content ul li strong {
  color: var(--primary-blue);
}

/* Quote styling */
.content blockquote {
  background-color: var(--bg-gray);
  border-left: 5px solid var(--secondary-blue);
  padding: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  font-size: 1.125rem;
  color: var(--medium-gray);
  border-radius: 0 0.5rem 0.5rem 0;
}

/* Publications and achievements */
.achievement-list {
  background-color: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin: 1rem 0;
}

.achievement-list h4 {
  color: var(--primary-blue);
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.achievement-list ul {
  margin: 0;
  padding-left: 1.25rem;
}

.achievement-list li {
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

/* Responsive design for about page */
@media (max-width: 768px) {
  .about-intro {
    padding: 2rem 0;
  }
  
  .about-intro p {
    font-size: 1.125rem;
  }
  
  .content h2 {
    font-size: 1.75rem;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .contact-card {
    padding: 1.5rem;
  }
  
  .professional-timeline {
    padding-left: 1.5rem;
  }
  
  .learning-timeline {
    padding: 1.5rem;
  }
}

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

.blog-card {
  background-color: var(--white);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--light-gray);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.blog-card-content {
  padding: 2rem;
}

.blog-meta {
  color: var(--text-gray);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.blog-card h3 {
  color: var(--dark-gray);
  margin-bottom: 1rem;
  font-size: 1.5rem;
  line-height: 1.3;
}

.blog-card h3 a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.blog-card p {
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.blog-tag {
  background-color: var(--light-gray);
  color: var(--medium-gray);
  padding: 0.25rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.blog-tag:hover {
  background-color: var(--light-blue);
  color: var(--primary-blue);
}

/* Footer */
footer {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 3rem 0 2rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-links a {
  color: var(--light-gray);
  font-size: 1.5rem;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: var(--secondary-blue);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--medium-gray);
  color: var(--text-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .subtitle {
    font-size: 1.25rem;
  }

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

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

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .nav-links {
    gap: 1.5rem;
  }

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

  .projects-showcase .projects-grid {
    gap: 1.5rem;
  }

  .projects-showcase .project-card {
    padding: 2rem;
  }

  .project-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .project-status {
    align-self: flex-start;
  }

  .projects-showcase .project-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  /* Blog responsive design */
  .blog-header h1 {
    font-size: 2rem;
  }

  .category-links {
    flex-direction: column;
    gap: 0.75rem;
  }

  .blog-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  .post-details {
    flex-direction: column;
    gap: 1rem;
  }

  .social-sharing {
    justify-content: flex-start;
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* Page Specific Styles */
.page-header {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: 3rem 0;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.content h2 {
  color: var(--dark-gray);
  margin: 2rem 0 1rem;
  font-size: 2rem;
}

.content h3 {
  color: var(--dark-gray);
  margin: 1.5rem 0 1rem;
  font-size: 1.5rem;
}

.content p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
  color: var(--text-gray);
}

.content ul,
.content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
  color: var(--text-gray);
}

.content li {
  margin-bottom: 0.5rem;
}