:root {
    --main-color: #0D1B2A;
    --accent-color-1: #1B263B;
    --accent-color-2: #415A77;
    --highlight-color: #778DA9;
    --neon-blue: #4F9DA6;
    --neon-purple: #9D4EDD;
    --golden-ratio-70: 70%;
    --golden-ratio-25: 25%;
    --golden-ratio-5: 5%;
  }

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

  body {
    background: linear-gradient(135deg, var(--main-color), var(--accent-color-1));
    color: var(--highlight-color);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .header {
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    padding: 20px 0;
    position: relative;
    z-index: 100;
  }

  .header-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
  }

  .header-subtitle {
    font-size: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
  }

  .main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 0;
  }

  article {
    background: rgba(27, 38, 59, 0.8);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
  }

  h2 {
    font-size: 1.8rem;
    color: var(--neon-blue);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--highlight-color);
    margin: 30px 0 15px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  .card {
    background: rgba(65, 90, 119, 0.3);
    border-radius: 12px;
    padding: 30px;
    margin: 30px 0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--neon-blue);
  }

  pre {
    background: rgba(13, 27, 42, 0.8);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 20px 0;
    border-left: 4px solid var(--neon-purple);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  code {
    color: #f8f8f2;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: rgba(27, 38, 59, 0.5);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  th {
    background: rgba(79, 157, 166, 0.2);
    color: var(--neon-blue);
    font-weight: 600;
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .decorative-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
  }

  .decorative-img:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
  }

  .footer {
    text-align: center;
    padding: 30px 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
  }

  .nav-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 30px 0;
  }

  .nav-link {
    color: var(--highlight-color);
    text-decoration: none;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-link:hover {
    color: white;
    background: rgba(79, 157, 166, 0.2);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--neon-blue);
    transition: all 0.3s ease;
    transform: translateX(-50%);
  }

  .nav-link:hover::after {
    width: 100%;
  }

  @media (max-width: 768px) {
    .main-content {
      grid-template-columns: 1fr;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      flex-direction: column;
      gap: 15px;
    }
    
    article {
      padding: 30px 20px;
    }
  }

  /* Animation effects */
  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-20px);
    }
  }

  .floating {
    animation: float 6s ease-in-out infinite;
  }

  .pulse {
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% {
      box-shadow: 0 0 0 0 rgba(79, 157, 166, 0.4);
    }
    70% {
      box-shadow: 0 0 0 10px rgba(79, 157, 166, 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(79, 157, 166, 0);
    }
  }

  .tech-notice {
    background: rgba(79, 157, 166, 0.2);
    border-left: 4px solid var(--neon-blue);
    padding: 15px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
    font-size: 0.9rem;
  }