:root {
  --primary: #0d1117;
  --secondary: #161b22;
  --accent: #58a6ff;
  --text: #ffffff;
  --text-secondary: #8b949e;
  --border: #30363d;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--primary);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Styles */
header {
  background-color: var(--secondary);
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--accent);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  object-fit: cover;
}

/* Navigation Styles */
.nav-list {
  display: flex;
  list-style: none;
  gap: 15px;
}

.nav-list a {
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 1rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
}

.nav-list a:hover {
  background-color: rgba(88, 166, 255, 0.1);
  text-decoration: none;
  color: var(--accent);
}

.nav-list a i {
  color: var(--accent);
  font-size: 1.1rem;
}

.nav-text {
  display: none;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.hamburger span {
  width: 100%;
  height: 3px;
  background-color: var(--accent);
  transition: all 0.3s ease;
}

/* Section Styles */
.section {
  margin: 40px 0;
  padding: 25px;
  background-color: var(--secondary);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.section-title {
  margin-top: 0;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 25px;
  font-size: 1.5rem;
  color: var(--accent);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 25px;
}

.about-card {
  background-color: var(--primary);
  padding: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.about-card h3 {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.about-card i {
  font-size: 1.2rem;
  color: var(--accent);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.project-card {
  background-color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  transition: all 0.3s ease;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

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

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 15px;
}

.project-tags span {
  background-color: rgba(88, 166, 255, 0.1);
  color: var(--accent);
  padding: 5px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid rgba(88, 166, 255, 0.2);
}

/* Participation Section */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--accent);
}

.timeline-item {
  position: relative;
  padding-bottom: 30px;
}

.timeline-date {
  position: absolute;
  left: -30px;
  top: 0;
  width: 60px;
  text-align: right;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.timeline-content {
  margin-left: 40px;
  padding: 15px;
  background-color: var(--primary);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.timeline-content h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 30px;
}

.blog-card {
  background-color: var(--primary);
  padding: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.blog-card:hover {
  border-color: var(--accent);
}

.blog-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 10px 0;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 15px;
  font-weight: 600;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.contact-info h3 {
  margin-bottom: 20px;
}

.contact-info p {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-info i {
  width: 20px;
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 25px;
}

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

.social-links a:hover {
  color: var(--accent);
  transform: translateY(-3px);
}

.contact-form .form-group {
  margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px;
  background-color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}

.contact-form textarea {
  resize: vertical;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 25px;
  background-color: rgba(88, 166, 255, 0.1);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn:hover {
  background-color: rgba(88, 166, 255, 0.2);
  text-decoration: none;
}

.view-all {
  text-align: center;
  margin-top: 20px;
}

/* Footer Styles */
footer {
  text-align: center;
  padding: 30px 0;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  margin-top: 50px;
}

footer p {
  margin-bottom: 10px;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 15px;
}

.footer-social a {
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  color: var(--accent);
}

/* Back to Top Button */
#back-to-top {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
}

#back-to-top:hover {
  background-color: #3d8eff;
  transform: translateY(-3px);
}

/* Tablet Styles */
@media (min-width: 600px) {
  .about-grid {
      grid-template-columns: 1fr 1fr;
  }

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

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

/* Desktop Styles */
@media (min-width: 900px) {
  .projects-grid {
      grid-template-columns: repeat(3, 1fr);
  }

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

/* Mobile Menu Styles */
@media (max-width: 768px) {
  .hamburger {
      display: flex;
  }
  
  .nav-list {
      position: fixed;
      top: 70px;
      right: -100%;
      width: 80%;
      max-width: 300px;
      height: calc(100vh - 70px);
      background-color: var(--secondary);
      flex-direction: column;
      align-items: center;
      padding: 20px 0;
      transition: right 0.3s ease;
      border-left: 1px solid var(--border);
  }
  
  .nav-list.active {
      right: 0;
  }
  
  .nav-list li {
      width: 100%;
      text-align: center;
  }
  
  .nav-list a {
      justify-content: center;
      padding: 15px;
  }
  
  .nav-text {
      display: inline;
      margin-left: 10px;
  }
  
  .hamburger.active span:nth-child(1) {
      transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active span:nth-child(2) {
      opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
      transform: translateY(-8px) rotate(-45deg);
  }
}