:root {
    --primary: #121212;
    --secondary: #1E1E1E;
    --accent1: #00FFFF;
    --accent2: #8A2BE2;
    --accent3: #00FF7F;
    --text: #FFFFFF;
    --text-secondary: #AAAAAA;
    --card-bg: #1E1E1E;
    --transition: all 0.3s ease;
  }

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

  body {
    background-color: var(--primary);
    color: var(--text);
    font-family: 'Montserrat', Arial, 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: 3rem;
    background: linear-gradient(135deg, rgba(30,30,30,0.8) 0%, rgba(18,18,18,0.9) 100%);
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  }

  .header::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent1), var(--accent2), var(--accent3));
    border-radius: 3px;
  }

  h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--accent1), var(--accent3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,255,255,0.3);
  }

  h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--accent1);
    position: relative;
    padding-left: 1rem;
  }

  h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 80%;
    width: 5px;
    background: linear-gradient(to bottom, var(--accent1), var(--accent2));
    border-radius: 5px;
  }

  h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 0.8rem;
    color: var(--accent3);
  }

  p {
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
  }

  article {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: rgba(30,30,30,0.7);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
  }

  article::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 15px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent1), var(--accent2), var(--accent3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: -1;
  }

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

  .card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,255,255,0.2);
  }

  .card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
  }

  .image-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
  }

  .decorative-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transition: var(--transition);
    filter: grayscale(30%);
  }

  .decorative-img:hover {
    transform: scale(1.03);
    filter: grayscale(0%);
    box-shadow: 0 8px 25px rgba(0,255,255,0.3);
  }

  pre {
    background: #1a1a1a;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow: auto;
    border-left: 4px solid var(--accent3);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent1);
    font-size: 0.9rem;
  }

  .note {
    background: rgba(0,255,127,0.1);
    border-left: 4px solid var(--accent3);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 5px 5px 0;
  }

  .note p {
    margin: 0;
    color: var(--accent3);
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(45deg, var(--accent1), var(--accent2));
    color: var(--primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0,255,255,0.3);
  }

  .nav-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,255,255,0.4);
    background: linear-gradient(45deg, var(--accent2), var(--accent1));
  }

  .footer-note {
    text-align: center;
    margin-top: 3rem;
    padding: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  @media (max-width: 768px) {
    .grid-container {
      grid-template-columns: 1fr;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    article {
      padding: 1.5rem;
    }
  }

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

  .floating {
    animation: float 6s ease-in-out infinite;
  }

  .pulse {
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% {
      box-shadow: 0 0 0 0 rgba(0, 255, 255, 0.4);
    }
    70% {
      box-shadow: 0 0 0 15px rgba(0, 255, 255, 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(0, 255, 255, 0);
    }
  }