:root {
      --primary: #0ea5e9;
      --background: #0f172a;
      --text: #e2e8f0;
      --card: #1e293b;
      --accent: #7c3aed;
    }
    
    body {
      margin: 0;
      font-family: 'Poppins', sans-serif;
      background-color: var(--background);
      color: var(--text);
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-family: 'Space Grotesk', sans-serif;
      font-weight: 600;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    
    .header {
      padding: 1.5rem 0;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 100;
      backdrop-filter: blur(10px);
      background-color: rgba(15, 23, 42, 0.8);
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
    }
    
    .profile-photo {
      border-radius: 50%;
      width: 60px;
      height: 60px;
      object-fit: cover;
      border: 3px solid var(--primary);
    }
    
    .hero {
      height: 100vh;
      padding-top: 80px;
      display: flex;
      align-items: center;
      position: relative;
    }
    
    .hero-bg {
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      z-index: -1;
    }
    
    .hero-content {
      max-width: 600px;
    }
    
    .project-gallery {
      min-height: 100vh;
      padding: 5rem 0;
      position: relative;
    }
    
    .three-container {
      height: 70vh;
      width: 100%;
      margin-bottom: 2rem;
      position: relative;
    }
    
    .project-overlay {
      position: absolute;
      bottom: 2rem;
      left: 2rem;
      background: rgba(15, 23, 42, 0.85);
      padding: 1.5rem;
      border-radius: 1rem;
      max-width: 400px;
      border-left: 4px solid var(--primary);
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.3s ease;
    }
    
    .project-overlay.visible {
      opacity: 1;
      transform: translateY(0);
    }
    
    .skills-section {
      padding: 5rem 0;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    
    .timeline {
      position: relative;
      margin: 3rem 0;
      padding-top: 2rem;
    }
    
    .timeline-line {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 4px;
      background: var(--primary);
      transform: translateX(-50%);
    }
    
    .timeline-item {
      margin-bottom: 3rem;
      position: relative;
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.5s ease;
    }
    
    .timeline-item.visible {
      opacity: 1;
      transform: translateY(0);
    }
    
    .timeline-item:nth-child(odd) {
      padding-right: calc(50% + 2rem);
      text-align: right;
    }
    
    .timeline-item:nth-child(even) {
      padding-left: calc(50% + 2rem);
    }
    
    .timeline-dot {
      position: absolute;
      top: 0;
      left: 50%;
      width: 20px;
      height: 20px;
      background: var(--accent);
      border-radius: 50%;
      transform: translateX(-50%);
    }
    
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
      gap: 1.5rem;
    }
    
    .skill-item {
      background: var(--card);
      border-radius: 0.75rem;
      padding: 1rem;
      text-align: center;
      transition: all 0.3s ease;
      opacity: 0;
      transform: translateY(20px);
    }
    
    .skill-item.visible {
      opacity: 1;
      transform: translateY(0);
    }
    
    .skill-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
    }
    
    .contact-section {
      padding: 5rem 0;
      min-height: 80vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    
    .form-control {
      margin-bottom: 1.5rem;
    }
    
    .form-control label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 500;
    }
    
    .form-control input, .form-control textarea {
      width: 100%;
      padding: 0.75rem 1rem;
      border-radius: 0.5rem;
      border: 1px solid #475569;
      background-color: rgba(30, 41, 59, 0.6);
      color: var(--text);
      font-family: 'Poppins', sans-serif;
      transition: all 0.3s ease;
    }
    
    .form-control input:focus, .form-control textarea:focus {
      border-color: var(--primary);
      outline: none;
      box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.3);
    }
    
    .loading-spinner {
      display: none;
      width: 30px;
      height: 30px;
      border: 3px solid #f3f3f3;
      border-top: 3px solid var(--primary);
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin-left: 1rem;
    }
    
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }
    
    .form-message {
      padding: 1rem;
      margin-top: 1.5rem;
      border-radius: 0.5rem;
      display: none;
    }
    
    .success-message {
      background-color: rgba(16, 185, 129, 0.2);
      border: 1px solid #10b981;
      color: #ecfdf5;
    }
    
    .error-message {
      background-color: rgba(239, 68, 68, 0.2);
      border: 1px solid #ef4444;
      color: #fef2f2;
    }
    
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--text);
      font-size: 1.5rem;
      cursor: pointer;
    }
    
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 70%;
      height: 100vh;
      background-color: var(--card);
      z-index: 200;
      padding: 2rem;
      transition: all 0.5s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    
    .mobile-menu.open {
      right: 0;
    }
    
    .mobile-close-btn {
      align-self: flex-end;
      background: none;
      border: none;
      color: var(--text);
      font-size: 1.5rem;
      margin-bottom: 2rem;
      cursor: pointer;
    }
    
    .progress-bar {
      position: fixed;
      top: 0;
      left: 0;
      height: 4px;
      background: linear-gradient(to right, var(--primary), var(--accent));
      z-index: 1000;
      width: 0%;
      transition: width 0.2s ease;
    }
    
    /* Responsive styles */
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      
      .desktop-nav {
        display: none;
      }
      
      .hero-content {
        text-align: center;
        padding: 0 1rem;
      }
      
      .timeline-line {
        left: 1rem;
      }
      
      .timeline-item:nth-child(odd), .timeline-item:nth-child(even) {
        padding-right: 0;
        padding-left: calc(2rem + 20px);
        text-align: left;
      }
      
      .timeline-dot {
        left: 1rem;
      }
    }