:root {
    --primary: #2c3e50;
    --primary-light: #34495e;
    --secondary: #27ae60;
    --accent: #e67e22;
    --text: #ecf0f1;
    --text-secondary: #bdc3c7;
  }

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

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

  .header {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    padding: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    box-shadow: 0 4px 30px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
  }

  .header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    animation: borderGlow 3s ease infinite;
  }

  @keyframes borderGlow {
    0% { opacity: 0.7; }
    50% { opacity: 1; }
    100% { opacity: 0.7; }
  }

  .notice {
    background: rgba(255,255,255,0.1);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 800px;
    text-align: center;
    border-left: 4px solid var(--accent);
    animation: fadeIn 1s ease;
  }

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

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

  article {
    background: rgba(255,255,255,0.05);
    border-radius: 16px;
    padding: 3rem;
    margin: 3rem 0;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  h1, h2, h3, h4 {
    margin: 1.5rem 0;
    font-weight: 500;
    line-height: 1.3;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, var(--text), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
  }

  h2 {
    font-size: 1.8rem;
    color: var(--text);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
    position: relative;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary), transparent);
  }

  h3 {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-top: 2rem;
  }

  p {
    margin: 1rem 0;
    font-size: 1.1rem;
  }

  strong {
    color: var(--text);
    font-weight: 500;
  }

  em {
    font-style: italic;
    color: var(--text-secondary);
  }

  pre {
    background: var(--primary-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow: auto;
    border-left: 4px solid var(--secondary);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  }

  code {
    font-family: 'Fira Code', monospace;
    color: var(--text);
    background: rgba(0,0,0,0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

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

  .image-card {
    background: var(--primary-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .image-card:hover img {
    transform: scale(1.05);
  }

  .nav-container {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(44,62,80,0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  }

  .nav-menu {
    display: flex;
    justify-content: center;
    gap: 2rem;
    list-style: none;
  }

  .nav-item {
    position: relative;
  }

  .nav-item a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
  }

  .nav-item a:hover {
    color: var(--secondary);
  }

  .nav-item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width 0.3s ease, left 0.3s ease;
  }

  .nav-item a:hover::after {
    width: 100%;
    left: 0;
  }

  @media (max-width: 768px) {
    .container {
      padding: 0 1rem;
    }
    
    article {
      padding: 2rem 1rem;
    }
    
    .nav-menu {
      gap: 1rem;
      flex-wrap: wrap;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }