:root {
      --bg-color: #0a0f1c;
      --card-bg: #111827;
      --text-color: #e0e0e0;
      --text-secondary: #9ca3af;
      --accent-color: #3b82f6;
      --accent-hover: #60a5fa;
      --border-color: rgba(255,255,255,0.1);
      --gradient: linear-gradient(135deg, #667eea 0%, #4670aa 100%);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Inter', sans-serif;
      background: var(--bg-color);
      color: var(--text-color);
      line-height: 1.6;
      overflow-x: hidden;
    }

  
    nav {
      position: fixed;
      top: 0;
      width: 100%;
      background: rgba(10, 15, 28, 0.9);
      backdrop-filter: blur(10px);
      z-index: 1000;
      padding: 1rem 0;
      transition: all 0.3s ease;
    }

    nav.scrolled {
      background: rgba(10, 15, 28, 0.95);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent-color);
    }

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

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

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-color);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-color);
      transition: width 0.3s ease;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

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

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

  
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      background: radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                  radial-gradient(circle at 80% 80%, rgba(92, 128, 246, 0.1) 0%, transparent 50%),
                  var(--bg-color);
    }

    .hero-content {
      max-width: 800px;
      padding: 0 2rem;
      animation: fadeInUp 1s ease-out;
    }

    .profile-img {
      width: 160px;
      height: 160px;
      border-radius: 50%;
      border: 4px solid var(--accent-color);
      object-fit: cover;
      margin-bottom: 2rem;
      box-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
      animation: float 3s ease-in-out infinite;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      background: linear-gradient(135deg, var(--accent-color), #5c80f6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero .subtitle {
      font-size: 1.25rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      min-height: 1.5em;
    }

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

    .btn {
      padding: 0.75rem 2rem;
      border: none;
      border-radius: 8px;
      font-weight: 500;
      text-decoration: none;
      transition: all 0.3s ease;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }

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

    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
    }

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

    .btn-secondary:hover {
      border-color: var(--accent-color);
      color: var(--accent-color);
    }

  
    .section {
      padding: 6rem 0;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }

    .section-header {
      text-align: center;
      margin-bottom: 4rem;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--accent-color);
    }

    .section-subtitle {
      font-size: 1.1rem;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto;
    }


    .about-content {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 4rem;
      align-items: center;
    }

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

    .about-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
    }

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

    .stat-item:hover {
      transform: translateY(-5px);
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-color);
      display: block;
    }

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

    
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      gap: 2rem;
    }

    .skill-item {
      text-align: center;
      padding: 2rem 1rem;
      background: var(--card-bg);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .skill-item:hover {
      transform: translateY(-5px);
      border-color: var(--accent-color);
    }

    .skill-icon {
      font-size: 3rem;
      color: var(--accent-color);
      margin-bottom: 1rem;
    }

    .skill-name {
      font-weight: 500;
      margin-bottom: 0.5rem;
    }

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

  .projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}


    .project-card {
      background: var(--card-bg);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: all 0.3s ease;
      position: relative;
    }

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

    .project-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .project-card:hover .project-image {
      transform: scale(1.05);
    }

    .project-content {
      padding: 1.5rem;
    }

    .project-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
      color: var(--text-color);
    }

    .project-description {
      color: var(--text-secondary);
      margin-bottom: 1.5rem;
      font-size: 0.95rem;
    }

    .project-buttons {
      display: flex;
      gap: 0.5rem;
    }

    .project-btn {
      padding: 0.5rem 1rem;
      border-radius: 6px;
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: all 0.3s ease;
    }

    .project-btn-primary {
      background: var(--accent-color);
      color: white;
    }

    .project-btn-primary:hover {
      background: var(--accent-hover);
    }

    .project-btn-secondary {
      background: transparent;
      color: var(--text-secondary);
      border: 1px solid var(--border-color);
    }

    .project-btn-secondary:hover {
      border-color: var(--accent-color);
      color: var(--accent-color);
    }


    .contact {
      background: var(--card-bg);
      border-radius: 20px;
      padding: 4rem 2rem;
      text-align: center;
      border: 1px solid var(--border-color);
    }

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

    .contact-title {
      font-size: 2rem;
      margin-bottom: 1rem;
    }

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

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

    footer {
      background: var(--card-bg);
      border-top: 1px solid var(--border-color);
      padding: 2rem 0;
      text-align: center;
      color: var(--text-secondary);
    }

    .footer-content {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 2rem;
    }


    .scroll-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 50px;
      height: 50px;
      background: var(--accent-color);
      border: none;
      border-radius: 50%;
      color: white;
      font-size: 1.2rem;
      cursor: pointer;
      opacity: 0;
      transform: translateY(100px);
      transition: all 0.3s ease;
      z-index: 1000;
    }

    .scroll-top.visible {
      opacity: 1;
      transform: translateY(0);
    }

    .scroll-top:hover {
      background: var(--accent-hover);
      transform: translateY(-3px);
    }


    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes float {
      0%, 100% {
        transform: translateY(0px);
      }
      50% {
        transform: translateY(-10px);
      }
    }

    .fade-in {
      opacity: 0;
      transform: translateY(30px);
      transition: all 0.8s ease;
    }

    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }


    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(10, 15, 28, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left 0.3s ease;
      }

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

      .mobile-menu {
        display: flex;
      }

      .hero h1 {
        font-size: 2.5rem;
      }

      .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

      .about-stats {
        grid-template-columns: 1fr;
      }

      .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
      }

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

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

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

      .section {
        padding: 4rem 0;
        padding-left: 1rem;
        padding-right: 1rem;
      }
    }


    ::-webkit-scrollbar {
      width: 8px;
    }

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

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

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


.education-timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.education-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-color);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-date {
  flex: 1;
  text-align: center;
  padding: 1rem;
}

.timeline-date span {
  background: var(--accent-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 500;
  font-size: 0.9rem;
}

.timeline-content {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin: 0 1rem;
  position: relative;
  transition: transform 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
}

.timeline-marker {
  position: absolute;
  top: 50%;
  width: 15px;
  height: 15px;
  background: var(--accent-color);
  border-radius: 50%;
  transform: translateY(-50%);
  border: 3px solid var(--bg-color);
}

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

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

.timeline-content h3 {
  color: var(--accent-color);
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: left;
}


@media (max-width: 768px) {
  .education-timeline::before {
    left: 20px;
  }
  
  .timeline-item {
    flex-direction: column !important;
    margin-left: 40px;
  }
  
  .timeline-date {
    text-align: left;
    padding: 0 0 1rem 0;
  }
  
  .timeline-content {
    margin: 0;
  }
  
  .timeline-marker {
    left: -28px !important;
  }
}