:root {
    --main-bg-color: #0A192F;
    --secondary-bg-color: #1E2D3D;
    --highlight-color-1: #6C5CE7;
    --highlight-color-2: #38B2AC;
    --text-color: #FFFFFF;
    --font-primary: 'Roboto', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    --card-bg: #1E2D3D;
    --card-hover-bg: linear-gradient(135deg, #6C5CE7, #38B2AC);
    --button-bg: #6C5CE7;
    --button-hover-bg: #38B2AC;
    --transition-speed: 0.3s;
    --container-padding: 20px;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --card-hover-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: radial-gradient(circle, rgba(10,25,47,1) 0%, rgba(30,45,61,1) 100%);
    color: var(--text-color);
    font-family: var(--font-primary);
    line-height: 1.6;
    padding: var(--container-padding);
  }
  
  h1, h2, h3, h4 {
    font-family: var(--font-secondary);
    margin-bottom: 16px;
  }
  
  h2 {
    font-size: 2em;
    color: var(--highlight-color-1);
  }
  
  h3 {
    font-size: 1.5em;
    color: var(--highlight-color-2);
  }
  
  p {
    margin-bottom: 16px;
    font-size: 1em;
  }
  
  pre {
    background-color: #2E3A59;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 16px;
  }
  
  code {
    color: #FFD700;
  }
  
  .container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
  }
  
  .card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), background var(--transition-speed);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .card img {
    width: 100px;
    height: 100px;
    margin-bottom: 16px;
  }
  
  .card h4 {
    margin-bottom: 12px;
    font-size: 1.2em;
    color: var(--highlight-color-1);
  }
  
  .card p {
    margin-bottom: 16px;
    font-size: 0.95em;
  }
  
  .card a {
    text-decoration: none;
    background-color: var(--button-bg);
    color: #fff;
    padding: 10px 20px;
    border-radius: 4px;
    transition: background-color var(--transition-speed);
  }
  
  .card a:hover {
    background-color: var(--button-hover-bg);
  }
  
  .card:hover {
    transform: scale(1.05);
    box-shadow: var(--card-hover-shadow);
    background: var(--card-hover-bg);
  }
  
  .demo-section {
    background-color: #1E2D3D;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 40px;
  }
  
  .demo-section h2 {
    color: #FFB6C1;
    margin-bottom: 20px;
  }
  
  .demo-section pre {
    background-color: #2E3A59;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 16px;
    color: #FFD700;
  }
  
  .footer {
    text-align: center;
    font-size: 1em;
    color: #CCCCCC;
    margin-top: 40px;
  }
  
  @keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  body {
    animation: aurora-move 15s linear infinite;
    background-size: 400% 400%;
  }
  
  /* Responsive Design */
  @media (max-width: 1440px) {
    .container {
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
  }
  
  @media (max-width: 1200px) {
    .container {
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
  }
  
  @media (max-width: 1024px) {
    .container {
      grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
  }
  
  @media (max-width: 768px) {
    .container {
      grid-template-columns: 1fr;
    }
  }
  
  @media (max-width: 480px) {
    body {
      padding: 10px;
    }
    .card {
      padding: 15px;
    }
    .card img {
      width: 80px;
      height: 80px;
    }
  }
  
  @media (max-width: 320px) {
    .card {
      padding: 10px;
    }
    .card img {
      width: 60px;
      height: 60px;
    }
  }