/* General Reset and Box Sizing */
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #FFFFFF;
    background: linear-gradient(135deg, #1E3A8A 70%, #F8FAFC 25%, #FFA500 5%);
    overflow-x: hidden;
    position: relative;
  }

  .container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 40px;
    padding: 40px;
    max-width: 1200px;
    margin: auto;
  }

  header {
    grid-column: 1 / -1;
    text-align: center;
    padding: 20px 0;
    background: rgba(30, 58, 138, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    animation: fadeIn 2s ease-in-out;
  }

  header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0.5px 0.5px 2px #1E3A8A;
  }

  header p {
    font-size: 1.2rem;
    color: #F8FAFC;
  }

  article {
    display: flex;
    flex-direction: column;
    gap: 40px;
  }

  section {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    animation: slideIn 1.5s ease-in-out;
  }

  section h2, section h3 {
    color: #FFA500;
    text-shadow: 0.5px 0.5px 2px #1E3A8A;
  }

  section h2 {
    font-size: 2rem;
    margin-bottom: 15px;
  }

  section h3 {
    font-size: 1.5rem;
    margin-top: 20px;
    margin-bottom: 10px;
  }

  section p, section ul, section pre {
    font-size: 1rem;
    color: #F8FAFC;
    text-shadow: 0.3px 0.3px 1px #1E3A8A;
  }

  section ul {
    list-style-type: disc;
    margin-left: 20px;
    margin-top: 10px;
  }

  section pre {
    background: #1E3A8A;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
    color: #FFA500;
    font-family: 'Courier New', Courier, monospace;
  }

  .highlight {
    background: rgba(255, 165, 0, 0.2);
    padding: 5px;
    border-radius: 3px;
  }

  .decorative-line {
    height: 4px;
    background: linear-gradient(to right, #FFA500, #1E3A8A);
    margin: 20px 0;
    border-radius: 2px;
  }

  img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  img:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 10px rgba(0,0,0,0.5);
  }

  .image-container {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
  }

  .image-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 58, 138, 0.3);
    transition: background 0.3s ease;
  }

  .image-container:hover::after {
    background: rgba(255, 165, 0, 0.3);
  }

  .footer {
    text-align: center;
    padding: 20px;
    background: rgba(30, 58, 138, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    margin-top: 40px;
    animation: fadeIn 2s ease-in-out;
  }

  .footer p {
    font-size: 1rem;
    color: #F8FAFC;
  }

  a {
    color: #FFA500;
    text-decoration: none;
    transition: color 0.3s ease;
  }

  a:hover {
    color: #FF8C00;
  }

  /* Responsive Design */
  @media (max-width: 1200px) {
    .container {
      grid-template-columns: 2fr 1fr;
    }
  }

  @media (max-width: 768px) {
    .container {
      grid-template-columns: 1fr;
      padding: 20px;
    }

    header, .footer {
      padding: 15px;
    }
  }

  @media (max-width: 480px) {
    header h1 {
      font-size: 2rem;
    }

    section h2 {
      font-size: 1.5rem;
    }

    section h3 {
      font-size: 1.2rem;
    }

    section p, section ul, section pre {
      font-size: 0.9rem;
    }
  }

  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }

  /* Button Styles */
  .button {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(to bottom, #FFA500, #FFC107);
    color: #FFFFFF;
    border: none;
    border-radius: 5px;
    box-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform 0.3s ease, background 0.3s ease;
    font-size: 1rem;
  }

  .button:hover {
    transform: scale(1.05);
    background: linear-gradient(to bottom, #FF8C00, #FFA500);
  }

  .button:active {
    transform: scale(0.95);
    background-color: #FF8C00;
  }

  /* Particle Effect */
  .particle-effect {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample12.png') repeat;
    opacity: 0.2;
    pointer-events: none;
    z-index: -1;
    animation: moveParticles 10s linear infinite;
  }

  @keyframes moveParticles {
    from { background-position: 0 0; }
    to { background-position: 1000px 1000px; }
  }

  /* Tooltip */
  .tooltip {
    position: relative;
    display: inline-block;
  }

  .tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(30, 58, 138, 0.9);
    color: #FFF;
    padding: 5px 10px;
    border-radius: 5px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
  }

  .tooltip:hover::after {
    opacity: 1;
  }