:root {
    --primary: #1E3A8A;
    --secondary: #F97316;
    --accent: #22C55E;
    --light: #E0F7FA;
    --dark: #121212;
    --text: #333333;
    --text-light: #FFFFFF;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--light) 0%, #FFFFFF 100%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

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

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

  header::after {
    content: "";
    display: block;
    width: 150px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    margin: 1rem auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 1.5rem;
  }

  h1 {
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

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

  h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--secondary);
  }

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

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

  a {
    color: var(--secondary);
    text-decoration: none;
    transition: var(--transition);
  }

  a:hover {
    color: var(--primary);
  }

  .card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  }

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

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

  .img-box {
    width: 150px;
    height: 150px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .img-box:hover {
    transform: scale(1.05);
  }

  .img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  pre {
    background: #f5f7fa;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow: auto;
    font-family: 'Courier New', monospace;
    border-left: 4px solid var(--secondary);
  }

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

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
  }

  th {
    background-color: var(--primary);
    color: white;
  }

  tr:nth-child(even) {
    background-color: #f9f9f9;
  }

  tr:hover {
    background-color: #f1f1f1;
  }

  .notice {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    margin: 2rem 0;
    box-shadow: var(--shadow);
  }

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

  .nav-link {
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    transition: var(--transition);
  }

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

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