:root {
      --primary-color: #1a5f7a;
      --secondary-color: #ffa500;
      --text-color: #333;
      --bg-color: #f9f9f9;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: 'Roboto', sans-serif;
      line-height: 1.6;
      color: var(--text-color);
      background-color: var(--bg-color);
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    header {
      background-color: var(--primary-color);
      color: white;
      padding: 2em 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    
    header::before {
      content: "";
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
      );
      transform: rotate(45deg);
      animation: shine 3s infinite;
    }
    
    @keyframes shine {
      0% {
        top: -50%;
        left: -50%;
      }
      100% {
        top: 150%;
        left: 150%;
      }
    }
    
    header h1 {
      font-size: 3em;
      margin-bottom: 0.2em;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }
    
    nav {
      background-color: var(--secondary-color);
      padding: 1em 0;
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    
    nav ul {
      list-style-type: none;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    nav ul li {
      margin: 0 15px;
    }
    
    nav ul li a {
      text-decoration: none;
      color: white;
      font-weight: bold;
      transition: color 0.3s ease;
    }
    
    nav ul li a:hover {
      color: var(--primary-color);
    }
    
    .content {
      padding: 2em 0;
    }
    
    .content section {
      margin-bottom: 3em;
      background-color: white;
      padding: 2em;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0,0,0,0.1);
      transition: transform 0.3s ease;
    }
    
    .content section:hover {
      transform: translateY(-5px);
    }
    
    h2 {
      color: var(--primary-color);
      margin-bottom: 1em;
      position: relative;
      padding-bottom: 0.5em;
    }
    
    h2::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 50px;
      height: 3px;
      background-color: var(--secondary-color);
    }
    
    ul {
      padding-left: 20px;
    }
    
    footer {
      background-color: var(--primary-color);
      color: white;
      text-align: center;
      padding: 1em 0;
      margin-top: 2em;
    }
    
    footer a {
      color: var(--secondary-color);
      text-decoration: none;
    }
    
    .scroll-to-top {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--secondary-color);
      color: white;
      width: 50px;
      height: 50px;
      text-align: center;
      line-height: 50px;
      border-radius: 50%;
      font-size: 20px;
      cursor: pointer;
      transition: background-color 0.3s ease;
      display: none;
    }
    
    .scroll-to-top:hover {
      background-color: var(--primary-color);
    }
    
    @media (max-width: 768px) {
      header h1 {
        font-size: 2em;
      }
      
      nav ul {
        flex-direction: column;
        align-items: center;
      }
      
      nav ul li {
        margin: 10px 0;
      }
    }