:root {
    --primary-color: #1e3c72;
    --secondary-color: #2a5298;
    --accent-color: #ff7e5f;
    --background-color: #0f172a;
    --text-color: #e2e8f0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
      radial-gradient(circle at 25% 25%, rgba(30, 60, 114, 0.8) 0%, transparent 50%),
      radial-gradient(circle at 75% 75%, rgba(42, 82, 152, 0.6) 0%, transparent 50%);
  }

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

  .header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
  }

  .header::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), transparent);
    margin: 1.5rem auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: white;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, #feb47b, #ff7e5f);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  h2 {
    font-size: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), transparent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

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

  .card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
  }

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

  .decorative-image {
    width: 150px;
    height: 150px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
  }

  .decorative-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 2rem 0;
    border-left: 4px solid var(--accent-color);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  code {
    color: #f8f8f2;
    background: transparent;
  }

  .notice {
    background: rgba(254, 180, 123, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
  }

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

  .nav-link {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
  }

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

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

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  .pulsing {
    animation: pulse 2s ease-in-out infinite;
  }