:root {
    --primary: linear-gradient(135deg, #1e3c72, #2a5298);
    --secondary: #2a5298;
    --accent: #00ff9d;
    --text: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', 'Open Sans', sans-serif;
  }

  body {
    background: var(--primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding-bottom: 50px;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  header {
    padding: 30px 0;
    text-align: center;
    position: relative;
  }

  .header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
  }

  h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, #00ff9d);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  }

  h2 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: #ffffff;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  .note {
    background: rgba(0, 255, 157, 0.1);
    border-left: 3px solid var(--accent);
    padding: 15px;
    margin: 20px 0;
    border-radius: 0 5px 5px 0;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  }

  .card img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
  }

  .card:hover img {
    transform: scale(1.03);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 3px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent);
  }

  .code-block {
    position: relative;
  }

  .code-block::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: #000;
    padding: 3px 10px;
    font-size: 0.8rem;
    border-radius: 0 8px 0 5px;
  }

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

  .particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: float 15s infinite linear;
  }

  @keyframes float {
    0% {
      transform: translateY(0) translateX(0);
      opacity: 0;
    }
    10% {
      opacity: 1;
    }
    90% {
      opacity: 1;
    }
    100% {
      transform: translateY(-100vh) translateX(100px);
      opacity: 0;
    }
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 30px 0;
  }

  .nav-link {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .nav-link:hover {
    background: var(--accent);
    color: #000;
    transform: translateY(-3px);
  }

  .footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    font-size: 0.9rem;
    opacity: 0.8;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2rem;
    }
    h2 {
      font-size: 1.6rem;
    }
    .grid {
      grid-template-columns: 1fr;
    }
  }