:root {
    --primary-bg: #121212;
    --secondary-bg: #1e1e1e;
    --accent-color: #00bcd4;
    --button-hover: #00e5ff;
    --text-color: #ffffff;
    --highlight: #00e5ff;
    --warning: #ffeb3b;
    --success: #00c853;
    --danger: #f50057;
  }

  @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

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

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

  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 188, 212, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 14px;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    animation: float 3s ease-in-out infinite;
  }

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

  .hero {
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0 5%;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
    animation: pulse 15s infinite alternate;
    z-index: -1;
  }

  @keyframes pulse {
    0% { transform: scale(1); opacity: 0.3; }
    100% { transform: scale(1.2); opacity: 0.1; }
  }

  .hero-content {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 2;
  }

  .hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #00bcd4, #00e5ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 188, 212, 0.3);
  }

  .hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, 0.8);
  }

  .hero-images {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
    flex-wrap: wrap;
  }

  .hero-image {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: all 0.3s ease;
    filter: grayscale(30%);
  }

  .hero-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 188, 212, 0.4);
    filter: grayscale(0%);
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(30, 30, 30, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  }

  .nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
  }

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

  .nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
  }

  .nav-link:hover {
    color: var(--accent-color);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
  }

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

  .container {
    max-width: 1200px;
    margin: 150px auto;
    padding: 0 5%;
  }

  article {
    background: var(--secondary-bg);
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
  }

  article::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
    z-index: 0;
  }

  article h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    position: relative;
    z-index: 1;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100px;
    height: 3px;
    background: var(--accent-color);
  }

  article h3 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--accent-color);
    position: relative;
    z-index: 1;
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    position: relative;
    z-index: 1;
  }

  pre {
    background: #1a1a1a;
    border-radius: 10px;
    padding: 20px;
    margin: 2rem 0;
    overflow-x: auto;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 1;
  }

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

  .code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #2d2d2d;
    padding: 8px 15px;
    border-radius: 10px 10px 0 0;
    margin-bottom: -15px;
    position: relative;
    z-index: 2;
  }

  .code-title {
    font-size: 0.8rem;
    color: #bdbdbd;
  }

  .code-copy {
    background: none;
    border: none;
    color: #bdbdbd;
    cursor: pointer;
    font-size: 0.8rem;
    transition: color 0.3s ease;
  }

  .code-copy:hover {
    color: var(--accent-color);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 3rem 0;
  }

  .image-card {
    background: #2a2a2a;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 188, 212, 0.2);
  }

  .image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }

  .image-card-content {
    padding: 20px;
  }

  .image-card h4 {
    margin-bottom: 10px;
    color: var(--accent-color);
  }

  .image-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
  }

  .accordion {
    margin: 2rem 0;
  }

  .accordion-item {
    background: #2a2a2a;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  }

  .accordion-header {
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #333;
    transition: background 0.3s ease;
  }

  .accordion-header:hover {
    background: #3a3a3a;
  }

  .accordion-header h4 {
    color: var(--text-color);
    font-size: 1.1rem;
  }

  .accordion-icon {
    transition: transform 0.3s ease;
  }

  .accordion-item.active .accordion-icon {
    transform: rotate(180deg);
  }

  .accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 20px;
  }

  .accordion-item.active .accordion-content {
    max-height: 500px;
    padding: 20px;
  }

  .footer {
    background: #1a1a1a;
    padding: 50px 5%;
    text-align: center;
    margin-top: 100px;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
  }

  .footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-link:hover {
    color: var(--accent-color);
  }

  .footer-copy {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.5rem;
    }
    
    .hero p {
      font-size: 1rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 30px;
    }
    
    article h2 {
      font-size: 2rem;
    }
    
    article h3 {
      font-size: 1.5rem;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 2rem;
    }
    
    .nav {
      flex-direction: column;
      gap: 15px;
      padding: 15px 5%;
    }
    
    .nav-links {
      width: 100%;
      justify-content: space-between;
    }
    
    article {
      padding: 20px;
    }
  }