:root {
    --obsydian-black: #1a1a1a;
    --obsydian-shine: #2d2d2d;
    --obsydian-accent: #646cff;
    --obsydian-accent-hover: #535bf2;
    --obsydian-glow: rgba(100, 108, 255, 0.08);
    --border-color: rgba(75, 75, 75, 0.5);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(180deg, var(--obsydian-black) 0%, #000000 100%);
    color: #e5e5e5;
    min-height: 100vh;
    line-height: 1.6;
  }
  
  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
  }
  
  @media (max-width: 1024px) {
    .container {
      max-width: 900px;
    }
  }
  
  /* Navbar */
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    backdrop-filter: blur(12px);
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
    z-index: 50;
  }
  
  .navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
  }
  
  .logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--obsydian-accent), #9089fc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: opacity 0.2s;
  }
  
  .logo:hover {
    opacity: 0.8;
  }
  
  .nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
  }
  
  .nav-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.2s;
  }
  
  .nav-links a:hover {
    color: #ffffff;
  }
  
  .github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.05);
    transition: background-color 0.2s;
  }
  
  .github-link:hover {
    background: rgba(255, 255, 255, 0.1);
  }
  
  /* Hero Section */
  .hero {
    padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 8vw, 6rem);
    position: relative;
    overflow: hidden;
  }
  
  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, var(--obsydian-glow) 0%, transparent 70%);
    pointer-events: none;
  }
  
  .hero .container {
    position: relative;
    text-align: center;
  }
  
  .hero h1 {
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #ffffff, #d1d5db, #9ca3af);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
  }
  
  .lead {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: #9ca3af;
    margin-bottom: 3rem;
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1rem;
  }
  
  .cta-buttons {
    display: flex;
    gap: clamp(0.5rem, 2vw, 1rem);
    justify-content: center;
    flex-wrap: wrap;
    padding: 0 1rem;
  }
  
  .btn {
    padding: clamp(0.5rem, 2vw, 0.75rem) clamp(1rem, 3vw, 1.5rem);
    border-radius: 9999px;
    font-weight: 600;
    font-size: clamp(0.75rem, 2vw, 0.875rem);
    text-decoration: none;
    transition: all 0.2s;
    min-width: 120px;
    text-align: center;
  }
  
  .btn-primary {
    background-color: var(--obsydian-accent);
    color: white;
    box-shadow: 0 8px 16px rgba(100, 108, 255, 0.2);
  }
  
  .btn-primary:hover {
    background-color: var(--obsydian-accent-hover);
  }
  
  .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #d1d5db;
  }
  
  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
  }
  
  /* Main Content */
  main {
    padding: 4rem 0;
  }
  
  section {
    margin-bottom: 6rem;
  }
  
  section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(to right, #ffffff, #9ca3af);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  /* Features Grid */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 3vw, 1.5rem);
    padding: 0 1rem;
  }
  
  .feature-card {
    padding: 1.5rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    transition: background-color 0.2s;
  }
  
  .feature-card:hover {
    background: rgba(255, 255, 255, 0.07);
  }
  
  .feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--obsydian-accent);
  }
  
  .feature-card p {
    color: #9ca3af;
  }
  
  /* Installation Section */
  .installation-options {
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 0 1rem;
  }
  
  .install-card {
    padding: 1.5rem;
    border-radius: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    margin-top: 20px;
  }
  
  .install-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--obsydian-accent);
  }
  
  /* Code Blocks */
  pre {
    border-radius: 0.5rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 1.5rem;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    margin: 1rem -1rem;
    font-size: clamp(0.8rem, 2vw, 0.875rem);
  }
  
  code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875rem;
    color: #d1d5db;
  }
  
  @media (max-width: 640px) {
    pre {
      border-radius: 0;
    }
  }
  
  /* Example Section */
  .concept-card {
    margin-bottom: 3rem;
    padding: 2rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
  }
  
  /* Footer */
  .footer {
    border-top: 1px solid var(--border-color);
    padding: clamp(1.5rem, 4vw, 2rem) 1rem;
    text-align: center;
    color: #6b7280;
  }
  
  /* Scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }
  
  ::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
  }
  
  ::-webkit-scrollbar-thumb {
    background: #4b5563;
    border-radius: 9999px;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: #6b7280;
  }
  
  /* Smooth Scrolling */
  html {
    scroll-behavior: smooth;
    font-size: 16px;
  }
  
  @media (max-width: 1024px) {
    html {
      font-size: 15px;
    }
  }
  
  @media (max-width: 768px) {
    html {
      font-size: 14px;
    }
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .nav-links {
      gap: 1rem;
    }
  
    .cta-buttons {
      flex-direction: column;
      align-items: stretch;
    }
  
    .btn {
      text-align: center;
    }
  
    .installation-options {
      grid-template-columns: 1fr;
    }
  
    .navbar {
      position: sticky;
    }
  
    .navbar .container {
      padding: 1rem;
    }
  
    .nav-links {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background: rgba(0, 0, 0, 0.95);
      padding: 1rem;
      border-bottom: 1px solid var(--border-color);
    }
  
    .nav-links.active {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
    }
  
    .menu-toggle {
      display: block;
      cursor: pointer;
    }
  }
  
  @media (max-width: 640px) {
    .navbar .container {
      flex-direction: column;
      gap: 1rem;
    }
  
    .nav-links {
      flex-direction: column;
      align-items: center;
    }
  
    .feature-grid {
      grid-template-columns: 1fr;
    }
  }
  
  /* Routing Section */
  .routing {
    padding: clamp(2rem, 5vw, 4rem) 1rem;
  }
  
  .routing .concept-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: clamp(1rem, 3vw, 2rem);
    margin-bottom: 2rem;
    transition: background-color 0.2s;
  }
  
  .routing .concept-card:hover {
    background: rgba(255, 255, 255, 0.07);
  }
  
  .routing .concept-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--obsydian-accent);
  }
  
  .routing pre {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 1rem -1rem;
  }
  
  .routing code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875rem;
    color: #d1d5db;
    line-height: 1.5;
  }
  
  @media (max-width: 640px) {
    .routing .concept-card {
      margin: 1rem 0;
      border-radius: 0.5rem;
    }
  }
  
  .feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .feature-list li {
    padding: 0.75rem 0;
    color: #9ca3af;
    display: flex;
    align-items: center;
    font-size: clamp(0.875rem, 2vw, 1rem);
  }
  
  .feature-list li:before {
    content: "•";
    color: var(--obsydian-accent);
    font-weight: bold;
    margin-right: 0.5rem;
  }
  
  /* Mobile Menu Toggle */
  .menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
  }
  
  @media (max-width: 768px) {
    .menu-toggle {
      display: block;
    }
  }
  
  /* Print Media Query */
  @media print {
    .navbar {
      position: static;
      border: none;
    }
  
    .hero::before {
      display: none;
    }
  
    .btn {
      border: 1px solid #000;
    }
  
    pre {
      border: 1px solid #000;
      page-break-inside: avoid;
    }
  }