:root {
    --primary: linear-gradient(135deg, #1e3c72, #2a5298, #8e2de2);
    --secondary: rgba(255, 255, 255, 0.1);
    --accent: #ff7e5f;
    --text: #ffffff;
    --text-secondary: #dddddd;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
  }

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

  body {
    background: var(--primary);
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
    font-family: 'Roboto', sans-serif;
    color: var(--text);
    line-height: 1.6;
    padding: 0 5%;
    max-width: 1800px;
    margin: 0 auto;
  }

  @keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  header {
    text-align: center;
    padding: 60px 0 40px;
    position: relative;
  }

  header::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--accent);
    margin: 30px auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    font-weight: 500;
    margin-bottom: 20px;
  }

  h1 {
    font-size: 2.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  }

  h2 {
    font-size: 2rem;
    margin-top: 60px;
    position: relative;
    padding-bottom: 15px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    margin-top: 40px;
    color: var(--accent);
  }

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

  strong {
    color: var(--accent);
  }

  .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
    margin: 60px 0;
  }

  .card {
    background: var(--secondary);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
  }

  .card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
      to bottom right,
      rgba(255, 255, 255, 0.1),
      rgba(255, 255, 255, 0)
    );
    transform: rotate(30deg);
    pointer-events: none;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 40px 0;
  }

  .image-container {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
  }

  .image-container:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  }

  .image-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
  }

  .image-container:hover img {
    transform: scale(1.1);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    position: relative;
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0),
      rgba(255, 255, 255, 0.1),
      rgba(255, 255, 255, 0)
    );
    animation: shine 3s infinite;
  }

  @keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
  }

  code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #f8f8f2;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  th {
    background: rgba(0, 0, 0, 0.4);
    font-weight: 500;
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .button {
    display: inline-block;
    background: linear-gradient(45deg, #ff6a00, #ee0979);
    border: none;
    padding: 15px 30px;
    color: #ffffff;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    margin: 20px 0;
    box-shadow: 0 5px 15px rgba(238, 9, 121, 0.4);
  }

  .button:hover {
    background: linear-gradient(45deg, #ee0979, #ff6a00);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(238, 9, 121, 0.6);
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin: 40px 0;
    text-align: center;
    border-left: 5px solid var(--accent);
  }

  @media (max-width: 768px) {
    .container {
      grid-template-columns: 1fr;
    }
    
    .image-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.7rem;
    }
  }

  @media (max-width: 480px) {
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    body {
      padding: 0 20px;
    }
    
    .card {
      padding: 30px;
    }
  }