:root {
    --primary-color: #0d47a1;
    --secondary-color: #00838f;
    --accent-color: #ff9800;
    --background-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #ffffff;
    --wave-color: rgba(13, 71, 161, 0.1);
    --section-padding: 80px;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
  }

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

  header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
    text-align: center;
  }

  header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="white"></path><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="white"></path><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="white"></path></svg>');
    background-size: cover;
    background-repeat: no-repeat;
  }

  h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }

  .subtitle {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
  }

  .reference-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-top: 30px;
    backdrop-filter: blur(5px);
  }

  .nav-container {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
  }

  nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-links {
    display: flex;
    gap: 25px;
  }

  .nav-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }

  .nav-links a:hover {
    color: var(--accent-color);
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
  }

  .nav-links a:hover::after {
    width: 100%;
  }

  main {
    padding: var(--section-padding) 0;
  }

  article {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 40px;
    margin-bottom: var(--section-padding);
  }

  h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--wave-color);
    position: relative;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: var(--accent-color);
  }

  h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin: 40px 0 20px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .image-card {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
  }

  pre {
    background: #282c34;
    color: #abb2bf;
    padding: 20px;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: 25px 0;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-color);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
  }

  code {
    font-family: 'Fira Code', monospace;
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 0.9em;
  }

  .code-title {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 5px 15px;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    margin-bottom: -5px;
    font-size: 0.9rem;
  }

  .summary-card {
    background: linear-gradient(135deg, rgba(13, 71, 161, 0.05), rgba(0, 131, 143, 0.05));
    border-left: 4px solid var(--accent-color);
    padding: 25px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin: 40px 0;
  }

  footer {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 60px 0 30px;
    text-align: center;
    position: relative;
  }

  footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="white"></path><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="white"></path><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="white"></path></svg>');
    background-size: cover;
    background-repeat: no-repeat;
    transform: rotate(180deg);
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
  }

  .footer-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
  }

  .footer-links a:hover {
    color: var(--accent-color);
  }

  .copyright {
    opacity: 0.8;
    font-size: 0.9rem;
    margin-top: 30px;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2rem;
    }

    h2 {
      font-size: 1.6rem;
    }

    h3 {
      font-size: 1.3rem;
    }

    .nav-links {
      gap: 15px;
    }

    article {
      padding: 25px;
    }

    .image-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: 0.7;
    }
  }

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