:root {
    --primary: #0B0F29;
    --secondary: #1E2A5A;
    --accent: #00C6FF;
    --accent2: #0072FF;
    --text: #FFFFFF;
    --highlight: #00B4D8;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

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

  header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: repeating-linear-gradient(
      0deg,
      var(--accent),
      var(--accent) 10px,
      var(--accent2) 10px,
      var(--accent2) 20px
    );
    animation: moveLines 10s linear infinite;
    opacity: 0.1;
    z-index: -1;
  }

  @keyframes moveLines {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }

  h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
  }

  .tagline {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: 30px;
  }

  .notice {
    background: rgba(255,255,255,0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 20px auto;
    max-width: 600px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
  }

  article {
    background: rgba(30,42,90,0.7);
    border-radius: 20px;
    padding: 40px;
    margin: 40px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  }

  h2 {
    font-size: 1.8rem;
    margin: 30px 0 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    border-radius: 3px;
  }

  h3 {
    font-size: 1.4rem;
    margin: 25px 0 15px;
    color: var(--highlight);
  }

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

  .card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    margin: 40px 0;
  }

  .card {
    background: var(--secondary);
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 350px;
    transition: all 0.3s ease;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0,0,0,0.4);
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 3px solid var(--accent);
  }

  .card-content {
    padding: 20px;
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
  }

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

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 30px 0;
  }

  .nav-link {
    color: var(--text);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 25px;
    background: rgba(255,255,255,0.1);
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: var(--accent);
    transform: translateY(-3px);
  }

  footer {
    text-align: center;
    padding: 30px;
    margin-top: 50px;
    background: rgba(0,0,0,0.2);
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  @media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }
    article { padding: 25px; }
    .card { max-width: 100%; }
  }