:root {
    --primary-dark: #0a0e17;
    --primary-light: #1a2035;
    --accent-cyan: #00ffff;
    --accent-purple: #800080;
    --accent-gold: #ffd700;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --transition-speed: 0.3s;
    --section-spacing: 4rem;
    --border-radius: 12px;
    --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glow-effect: 0 0 15px rgba(0, 255, 255, 0.7);
  }

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

  body {
    font-family: 'Roboto', 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    padding: 0;
    margin: 0;
  }

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

  header {
    position: relative;
    padding: 2rem 0;
    margin-bottom: var(--section-spacing);
    background: linear-gradient(90deg, 
      rgba(10, 14, 23, 0.8) 0%, 
      rgba(26, 32, 53, 0.9) 50%, 
      rgba(10, 14, 23, 0.8) 100%);
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    box-shadow: var(--box-shadow);
  }

  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: var(--glow-effect);
    transition: all var(--transition-speed) ease;
  }

  .notice {
    background: rgba(0, 255, 255, 0.1);
    padding: 1rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-cyan);
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
  }

  nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
  }

  nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    position: relative;
  }

  nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width var(--transition-speed) ease;
  }

  nav a:hover {
    color: var(--accent-cyan);
  }

  nav a:hover::after {
    width: 80%;
  }

  article {
    background: rgba(26, 32, 53, 0.6);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: var(--section-spacing);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
  }

  article::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, 
      rgba(0, 255, 255, 0.05) 0%, 
      transparent 70%);
    animation: rotate 60s linear infinite;
    z-index: -1;
  }

  @keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-cyan);
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
  }

  h3 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
  }

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

  .image-card {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease;
    aspect-ratio: 1/1;
  }

  .image-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 15px 45px rgba(0, 255, 255, 0.3);
  }

  .image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .image-card:hover img {
    transform: scale(1.1);
  }

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
      rgba(0, 255, 255, 0.3) 0%, 
      rgba(128, 0, 128, 0.3) 100%);
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
  }

  .image-card:hover::after {
    opacity: 1;
  }

  table {
    width: 100%;
    margin: 2rem 0;
    border-collapse: collapse;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    background: rgba(10, 14, 23, 0.7);
    border: 1px solid rgba(0, 255, 255, 0.2);
  }

  th {
    background: linear-gradient(90deg, 
      rgba(0, 255, 255, 0.2), 
      rgba(128, 0, 128, 0.2));
    padding: 1rem;
    text-align: left;
    color: var(--accent-cyan);
    font-weight: 600;
  }

  td {
    padding: 1.5rem;
    border-top: 1px solid rgba(0, 255, 255, 0.1);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 1.5rem;
    border-radius: calc(var(--border-radius) - 5px);
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    color: var(--accent-cyan);
    border-left: 4px solid var(--accent-cyan);
    margin: 1rem 0;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-cyan);
    color: var(--primary-dark);
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    font-weight: bold;
    border-bottom-left-radius: var(--border-radius);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-cyan);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
  }

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

  li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
  }

  footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: var(--section-spacing);
    border-top: 1px solid rgba(0, 255, 255, 0.2);
    color: var(--text-secondary);
    font-size: 0.9rem;
  }

  .particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
  }

  .particle {
    position: absolute;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite linear;
  }

  @keyframes float {
    0% {
      transform: translateY(0) translateX(0);
      opacity: 0;
    }
    10% {
      opacity: 0.6;
    }
    90% {
      opacity: 0.6;
    }
    100% {
      transform: translateY(-100vh) translateX(100px);
      opacity: 0;
    }
  }

  @media (max-width: 768px) {
    .container {
      padding: 0 1rem;
    }
    
    article {
      padding: 2rem 1rem;
    }
    
    .header-content {
      flex-direction: column;
      gap: 1rem;
    }
    
    nav ul {
      flex-wrap: wrap;
      justify-content: center;
      gap: 1rem;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    h3 {
      font-size: 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (min-width: 769px) and (max-width: 1024px) {
    .image-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }