:root {
    --primary: #2a5298;
    --secondary: #1e3c72;
    --accent: #ff7f50;
    --light: #f5f5f5;
    --dark: #333;
    --white: #fff;
    --radius: 10px;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    color: var(--dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 20px 40px;
  }

  .design-notice {
    position: fixed;
    top: 80px;
    right: 20px;
    background: rgba(255,255,255,0.9);
    padding: 10px 15px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 1000;
    font-size: 14px;
    color: var(--primary);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.2);
  }

  .navbar {
    background: linear-gradient(90deg, var(--secondary), var(--primary));
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }

  .nav-links {
    display: flex;
    gap: 20px;
  }

  .nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 5px;
    transition: var(--transition);
    position: relative;
  }

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

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

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

  h2 {
    font-size: 2.5em;
    margin-bottom: 30px;
    color: var(--primary);
    position: relative;
    padding-bottom: 15px;
  }

  h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    border-radius: 2px;
  }

  h3 {
    font-size: 1.75em;
    margin: 30px 0 20px;
    color: var(--secondary);
  }

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

  strong {
    color: var(--primary);
    font-weight: 500;
  }

  pre {
    background: #282c34;
    border-radius: var(--radius);
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    box-shadow: var(--shadow);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #abb2bf;
    font-size: 0.9em;
    line-height: 1.5;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent), #ff6347);
    color: var(--white);
    padding: 12px 25px;
    border: none;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(255,127,80,0.3);
    display: inline-block;
    margin: 10px 0;
  }

  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255,127,80,0.4);
  }

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

  .card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius) var(--radius) 0 0;
  }

  .card-content {
    padding: 20px;
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--radius);
    transition: var(--transition);
    box-shadow: var(--shadow);
  }

  .gallery-img:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }

  .sidebar {
    background: rgba(255,255,255,0.8);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(5px);
  }

  .sidebar-title {
    font-size: 1.3em;
    margin-bottom: 15px;
    color: var(--primary);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 10px;
  }

  .sidebar-list {
    list-style: none;
  }

  .sidebar-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
  }

  .sidebar-list li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
  }

  @media (max-width: 768px) {
    .container {
      padding: 100px 15px 30px;
    }
    
    article {
      padding: 25px;
    }
    
    h2 {
      font-size: 2em;
    }
    
    h3 {
      font-size: 1.5em;
    }
    
    .nav-links {
      display: none;
    }
    
    .design-notice {
      top: 70px;
      right: 10px;
      font-size: 12px;
    }
  }

  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-10px);
    }
  }

  .floating {
    animation: float 3s ease-in-out infinite;
  }