:root {
    --primary: #4A90E2;
    --secondary: #50E3C2;
    --accent: #FF7F50;
    --dark: #1E3A8A;
    --light: #F8F9FA;
    --text: #2D3748;
    --gray: #E2E8F0;
  }

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

  body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, #F8F9FA 0%, #E2E8F0 100%);
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .design-notice {
    background: rgba(255,255,255,0.9);
    padding: 1rem;
    text-align: center;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    font-weight: 600;
    color: var(--dark);
  }

  header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 3rem 2rem;
    text-align: center;
    border-radius: 0 0 20px 20px;
    margin-bottom: 3rem;
    box-shadow: 0 10px 20px rgba(74, 144, 226, 0.2);
  }

  h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    margin-bottom: 1.5rem;
  }

  h1 {
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

  h2 {
    font-size: 1.8rem;
    color: var(--dark);
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    border-radius: 2px;
  }

  h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-top: 2rem;
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  span {
    font-weight: 600;
    color: var(--primary);
  }

  article {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    margin-bottom: 3rem;
  }

  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
  }

  .card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
  }

  .card img {
    width: 100%;
    height: auto;
    display: block;
  }

  .card-content {
    padding: 1.5rem;
  }

  pre {
    background: #2D3748;
    color: #E2E8F0;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 2rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent);
    color: white;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 0 0 8px 0;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(74, 144, 226, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    color: var(--primary);
    font-size: 0.9rem;
  }

  .parallax-section {
    height: 400px;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin: 3rem 0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
  }

  .parallax-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 58, 138, 0.6);
  }

  .parallax-content {
    position: relative;
    z-index: 2;
    color: white;
    text-align: center;
    padding: 2rem;
    max-width: 800px;
  }

  .btn {
    display: inline-block;
    background: linear-gradient(45deg, var(--accent), #FF4500);
    color: white;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin: 1rem 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(255, 127, 80, 0.3);
  }

  .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(255, 127, 80, 0.4);
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
  }

  .nav-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: rgba(74, 144, 226, 0.1);
  }

  @media (max-width: 768px) {
    .container {
      padding: 1rem;
    }
    
    article {
      padding: 2rem 1rem;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .parallax-section {
      height: 300px;
    }
  }

  @keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
  }

  .floating {
    animation: float 6s ease-in-out infinite;
  }