:root {
    --primary-color: #0d1b2a;
    --secondary-color: #1b263b;
    --accent-color: #00ffff;
    --highlight-color: #00ff00;
    --text-color: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s ease;
  }

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

  body {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), #415a77);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
  }

  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    border-radius: 30px;
    z-index: 1000;
    font-size: 14px;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  }

  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(13, 27, 42, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-links a {
    color: var(--text-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%;
  }

  .hero {
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 10%;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
    z-index: -1;
  }

  @keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .hero-content {
    max-width: 800px;
    padding: 40px;
    background: rgba(13, 27, 42, 0.5);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  .hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--accent-color), var(--highlight-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: var(--transition);
  }

  .hero h1:hover {
    transform: scale(1.05);
  }

  .hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
  }

  article {
    background: rgba(13, 27, 42, 0.7);
    border-radius: 20px;
    padding: 40px;
    margin: 50px 0;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }

  article h2 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--accent-color);
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), transparent);
  }

  article h3 {
    font-size: 1.8rem;
    margin: 30px 0 20px;
    color: var(--text-color);
  }

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

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    border-left: 3px solid var(--accent-color);
  }

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

  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    backdrop-filter: blur(5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

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

  .card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: var(--transition);
  }

  .card:hover::before {
    animation: shine 1.5s;
  }

  @keyframes shine {
    0% { left: -100%; }
    100% { left: 100%; }
  }

  .card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
  }

  .card:hover img {
    transform: scale(1.03);
  }

  .card h4 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--accent-color);
  }

  .card p {
    margin-bottom: 15px;
    font-size: 1rem;
  }

  .tag {
    display: inline-block;
    background: rgba(0, 255, 255, 0.2);
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-right: 8px;
    margin-bottom: 8px;
  }

  .light-effect {
    position: absolute;
    width: 5px;
    height: 5px;
    background: var(--highlight-color);
    border-radius: 50%;
    animation: blink 1.5s infinite;
  }

  @keyframes blink {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
  }

  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease-out, transform 1s ease-out;
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }

  footer {
    background: rgba(13, 27, 42, 0.9);
    padding: 30px 0;
    text-align: center;
    margin-top: 80px;
    backdrop-filter: blur(10px);
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.2rem;
    }
    
    .hero p {
      font-size: 1rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 30px 20px;
    }
    
    .grid-container {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 1.8rem;
    }
    
    .navbar {
      padding: 15px 5%;
    }
    
    .nav-links {
      gap: 10px;
      font-size: 0.9rem;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.4rem;
    }
  }