:root {
    --primary: linear-gradient(135deg, #0d47a1, #8e24aa);
    --secondary: rgba(255, 255, 255, 0.1);
    --accent: gold;
    --text: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    background: var(--primary);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding: 0 5%;
  }

  .header {
    text-align: center;
    padding: 3rem 0;
    position: relative;
    margin-bottom: 4rem;
  }

  .header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
  }

  .notice {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    border-radius: var(--radius);
    margin: 2rem auto;
    max-width: 800px;
    text-align: center;
    font-size: 0.9rem;
    border: 1px solid rgba(255,255,255,0.1);
  }

  .article-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
  }

  article {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: var(--shadow);
  }

  article h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: linear-gradient(90deg, #ffffff, #c0c0c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    padding-bottom: 1rem;
  }

  article h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  article h3 {
    font-size: 1.8rem;
    margin: 2rem 0 1.5rem;
    color: var(--accent);
  }

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

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #ffcc00;
  }

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

  .gallery img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    object-fit: cover;
    aspect-ratio: 1/1;
  }

  .gallery img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius);
    overflow: hidden;
  }

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

  th {
    background: rgba(0,0,0,0.3);
    color: var(--accent);
  }

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

  ol, ul {
    padding-left: 2rem;
    margin: 1.5rem 0;
  }

  li {
    margin-bottom: 0.8rem;
  }

  .coin-demo {
    width: 150px;
    height: 150px;
    background: var(--accent);
    border-radius: 50%;
    margin: 2rem auto;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCoin 8s infinite linear;
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
  }

  @keyframes rotateCoin {
    from { transform: rotateY(0deg); }
    to { transform: rotateY(360deg); }
  }

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

  .card {
    background: var(--secondary);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
  }

  .nav-links {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 100;
  }

  .nav-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  }

  .nav-link:hover {
    background: var(--accent);
    transform: scale(1.1);
  }

  @media (max-width: 768px) {
    body {
      padding: 0 2%;
    }
    
    article {
      padding: 2rem;
    }
    
    .nav-links {
      display: none;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
    
    .card-container {
      grid-template-columns: 1fr;
    }
  }