:root {
    --primary: #0f2027;
    --secondary: #203a43;
    --accent: #f59e0b;
    --text: #ffffff;
    --card-bg: #1e3a8a;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary), #2c5364);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
  }

  body {
    background: var(--gradient);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  .header {
    background: var(--primary);
    padding: 20px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
  }

  .menu {
    display: flex;
    list-style: none;
  }

  .menu li {
    margin-left: 30px;
  }

  .menu a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
  }

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

  .menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

  .menu a:hover::after {
    width: 100%;
  }

  .hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
  }

  .hamburger div {
    width: 25px;
    height: 3px;
    background-color: var(--accent);
    margin: 4px 0;
    transition: all 0.3s ease;
  }

  .hero {
    padding: 150px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    animation: fadeIn 1s ease;
  }

  .hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
    animation: fadeIn 1s 0.3s ease both;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, rgba(0,0,0,0) 70%);
    pointer-events: none;
  }

  .sparkle {
    position: absolute;
    width: 5px;
    height: 5px;
    background: var(--accent);
    border-radius: 50%;
    animation: sparkle 1.5s infinite;
    pointer-events: none;
  }

  @keyframes sparkle {
    0% { transform: translateY(0) scale(1); opacity: 1; }
    100% { transform: translateY(-100px) scale(0.5); opacity: 0; }
  }

  .content {
    padding: 80px 0;
  }

  article {
    background: rgba(30, 58, 138, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 60px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }

  article h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--accent);
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: var(--accent);
  }

  article h3 {
    font-size: 24px;
    margin: 30px 0 20px;
    color: var(--text);
  }

  article p {
    margin-bottom: 20px;
    font-size: 17px;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

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

  table {
    width: 100%;
    margin: 30px 0;
    border-collapse: collapse;
    background: rgba(30, 58, 138, 0.3);
    border-radius: 10px;
    overflow: hidden;
  }

  table thead {
    background: var(--accent);
  }

  table th {
    padding: 15px;
    text-align: left;
    color: var(--primary);
    font-weight: 700;
  }

  table td {
    padding: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    margin: 20px 0;
  }

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

  .footer {
    background: var(--primary);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
  }

  .footer p {
    font-size: 14px;
    opacity: 0.8;
  }

  .reference {
    background: rgba(245, 158, 11, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 30px 0;
    text-align: center;
    font-style: italic;
  }

  @media (max-width: 992px) {
    .hero h1 {
      font-size: 36px;
    }
    .hero p {
      font-size: 18px;
    }
  }

  @media (max-width: 768px) {
    .menu {
      display: none;
      flex-direction: column;
      position: absolute;
      top: 80px;
      right: 20px;
      background: var(--primary);
      padding: 20px;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      width: 200px;
    }
    .menu.active {
      display: flex;
    }
    .menu li {
      margin: 10px 0;
    }
    .hamburger {
      display: flex;
    }
    article {
      padding: 30px 20px;
    }
  }

  @media (max-width: 576px) {
    .hero h1 {
      font-size: 28px;
    }
    .hero p {
      font-size: 16px;
    }
    article h2 {
      font-size: 26px;
    }
    article h3 {
      font-size: 20px;
    }
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }