:root {
    --primary-color: #1e3c72;
    --secondary-color: #2a5298;
    --accent-color: #ff6600;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #1a1a2e;
    --card-bg: #ffffff;
    --transition: all 0.3s ease;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100%;
    overflow-x: hidden;
  }

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

  .header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
  }

  .header::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 1rem auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

  h2 {
    font-size: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  .tech-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem;
    text-align: center;
    border-radius: 8px;
    margin: 2rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
  }

  .tech-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    animation: pulse 6s infinite linear;
  }

  @keyframes pulse {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: var(--transition);
    position: relative;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid rgba(0,0,0,0.1);
  }

  .card-content {
    padding: 1.5rem;
  }

  .code-block {
    background: #282c34;
    color: #abb2bf;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
    position: relative;
  }

  .code-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px 8px 0 0;
  }

  .code-block code {
    display: block;
    white-space: pre;
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
  }

  .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
  }

  .nav-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  }

  .nav-link:hover::before {
    left: 100%;
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
  }

  .gallery-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: var(--transition);
  }

  .gallery-img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
  }

  .footer-note {
    text-align: center;
    padding: 1.5rem;
    background: rgba(0,0,0,0.05);
    border-radius: 8px;
    margin-top: 3rem;
    font-size: 0.9rem;
    color: #666;
  }

  @media (max-width: 768px) {
    .container {
      padding: 1.5rem;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.7rem;
    }
    
    .card-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      flex-direction: column;
      align-items: center;
    }
  }

  /* 3D Card Effect */
  .card-3d {
    perspective: 1000px;
  }

  .card-3d-inner {
    transition: transform 0.6s;
    transform-style: preserve-3d;
    position: relative;
  }

  .card-3d:hover .card-3d-inner {
    transform: rotateY(10deg) rotateX(5deg);
  }

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

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  /* Glow Effect */
  .glow {
    box-shadow: 0 0 15px rgba(255,102,0,0.5);
  }

  /* Section Divider */
  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    margin: 3rem 0;
    border: none;
  }