:root {
    --primary-dark: #0d1b2a;
    --primary-darker: #1b263b;
    --accent-teal: #00ffcc;
    --accent-blue: #00ccff;
    --text-light: #ffffff;
    --text-muted: rgba(255,255,255,0.7);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap');
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

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

  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(27, 38, 59, 0.9);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    backdrop-filter: blur(5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 100;
    border: 1px solid rgba(0,255,204,0.3);
  }

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

  header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-darker));
    padding: 60px 0 40px;
    position: relative;
    overflow: hidden;
  }

  header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,255,204,0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
    z-index: 0;
  }

  @keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

  .header-content {
    position: relative;
    z-index: 1;
    text-align: center;
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--accent-teal), var(--accent-blue));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: glow 2s infinite alternate;
  }

  @keyframes glow {
    from { text-shadow: 0 0 10px var(--accent-teal), 0 0 20px var(--accent-teal); }
    to { text-shadow: 0 0 20px var(--accent-blue), 0 0 30px var(--accent-blue); }
  }

  .header-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 40px;
  }

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

  .header-image {
    width: 320px;
    height: 320px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
    transition: var(--transition);
    border: 2px solid rgba(0,255,204,0.3);
  }

  .header-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 40px rgba(0,0,0,0.4);
    border-color: var(--accent-teal);
  }

  nav {
    background: rgba(27, 38, 59, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0,255,204,0.1);
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
  }

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

  .nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-teal), var(--accent-blue));
    transition: var(--transition);
  }

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

  article {
    padding: 60px 0;
    background: var(--primary-dark);
  }

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

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

  h3 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    color: var(--text-light);
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-muted);
    line-height: 1.8;
  }

  .content-block {
    background: var(--primary-darker);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 1px solid rgba(0,255,204,0.1);
    transition: var(--transition);
  }

  .content-block:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
    border-color: rgba(0,255,204,0.3);
  }

  pre {
    background: #0a121f;
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
    border-left: 4px solid var(--accent-teal);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

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

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

  .grid-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 10px;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border: 1px solid rgba(0,255,204,0.2);
  }

  .grid-image:hover {
    transform: scale(1.03);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
    border-color: var(--accent-teal);
  }

  .summary {
    background: linear-gradient(135deg, var(--primary-darker), #14213d);
    padding: 50px;
    border-radius: 15px;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
  }

  .summary::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,204,255,0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite reverse;
    z-index: 0;
  }

  .summary-content {
    position: relative;
    z-index: 1;
  }

  footer {
    background: var(--primary-darker);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid rgba(0,255,204,0.1);
  }

  @media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.6rem; }
  }

  @media (max-width: 768px) {
    .nav-container { flex-direction: column; }
    .nav-links { margin-top: 20px; gap: 20px; }
    .header-images { flex-direction: column; align-items: center; }
    .content-block { padding: 30px; }
  }

  @media (max-width: 576px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    .header-image { width: 280px; height: 280px; }
  }