:root {
    --primary: #1E90FF;
    --secondary: #6a11cb;
    --accent: #FFA500;
    --text: #333;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #32CD32;
    --gradient: linear-gradient(135deg, var(--secondary), var(--primary));
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.7;
    color: var(--text);
    background: var(--light);
    overflow-x: hidden;
  }

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

  /* Header Styles */
  .header {
    background: var(--gradient);
    color: white;
    padding: 2rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 3rem;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
  }

  .header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
  }

  .design-ref {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
  }

  /* Article Styles */
  article {
    background: white;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    padding: 3rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
  }

  article::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: url('https://images.gptkong.com/demo/sample2.png') center/contain no-repeat;
    opacity: 0.1;
    z-index: 0;
  }

  article h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
  }

  article h3 {
    color: var(--secondary);
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    position: relative;
    z-index: 1;
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
  }

  /* Code Block Styles */
  pre {
    background: #282c34;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px 10px 0 0;
  }

  pre code {
    color: #abb2bf;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    display: block;
    overflow-x: auto;
    line-height: 1.6;
  }

  /* Table Styles */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    overflow: hidden;
  }

  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
  }

  th {
    background: var(--gradient);
    color: white;
    font-weight: 600;
  }

  tr:nth-child(even) {
    background: rgba(106, 17, 203, 0.05);
  }

  tr:hover {
    background: rgba(106, 17, 203, 0.1);
  }

  /* Image Gallery */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .gallery-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }

  .gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
  }

  /* Navigation */
  .nav-tabs {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
    position: sticky;
    top: 20px;
    z-index: 100;
    background: white;
    padding: 1rem;
    border-radius: 50px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  }

  .nav-tab {
    padding: 0.8rem 2rem;
    margin: 0 0.5rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    color: var(--dark);
    background: transparent;
    border: none;
    outline: none;
  }

  .nav-tab:hover {
    background: rgba(106, 17, 203, 0.1);
    color: var(--secondary);
  }

  .nav-tab.active {
    background: var(--gradient);
    color: white;
  }

  /* Responsive Adjustments */
  @media (max-width: 768px) {
    .header h1 {
      font-size: 2rem;
    }
    
    article {
      padding: 2rem;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
    
    .nav-tabs {
      flex-wrap: wrap;
      border-radius: 15px;
    }
    
    .nav-tab {
      margin: 0.3rem;
      padding: 0.6rem 1.5rem;
    }
  }

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

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

  /* Utility Classes */
  .highlight {
    background: rgba(255, 165, 0, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    color: var(--accent);
  }

  .divider {
    height: 2px;
    background: linear-gradient(to right, transparent, var(--primary), transparent);
    margin: 2rem 0;
    border: none;
  }

  /* Footer */
  .footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text);
    font-size: 0.9rem;
  }