:root {
    --primary: #4567b7;
    --accent: #ff9800;
    --bg: #f5f5f5;
    --text: #333;
    --card-bg: #fff;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @font-face {
    font-family: 'Roboto';
    src: local('Roboto'), local('Roboto-Regular');
    font-display: swap;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--primary), #3a5a9a);
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  .notice {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
  }

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

  article {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
  }

  article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
  }

  h2 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--accent));
  }

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

  p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
  }

  pre {
    background: #2d2d2d;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow: auto;
    position: relative;
  }

  code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
    font-size: 0.95rem;
    line-height: 1.5;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .gallery img:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  }

  .nav-links {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 100;
  }

  .nav-link {
    background: rgba(255,255,255,0.9);
    color: var(--primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    font-weight: bold;
    text-decoration: none;
  }

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

  @media (max-width: 768px) {
    .main {
      padding: 1rem;
    }
    
    article {
      padding: 1.5rem;
    }
    
    .nav-links {
      display: none;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 500px) {
    article {
      padding: 1rem;
    }
    
    h2 {
      font-size: 1.7rem;
    }
    
    h3 {
      font-size: 1.3rem;
    }
  }

  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  article {
    animation: fadeIn 0.6s ease-out forwards;
  }

  .nav-link:nth-child(1) { animation-delay: 0.1s; }
  .nav-link:nth-child(2) { animation-delay: 0.2s; }
  .nav-link:nth-child(3) { animation-delay: 0.3s; }
  .nav-link:nth-child(4) { animation-delay: 0.4s; }