:root {
    --background: #000000;
    --foreground: #ffffff;
    --card: rgba(20, 20, 25, 0.5);
    --primary: #ffffff;
    --primary-dark: #d9d9d9;
    --primary-glow: rgba(255, 255, 255, 0.16);
    --secondary: rgba(255, 255, 255, 0.03);
    --accent: #bfbfbf;
    --muted: #94a3b8;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --up: rgba(34, 197, 94, 0.9);
    --down: rgba(239, 68, 68, 0.9);
    --trans: 0.25s;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow: 0 8px 32px rgba(255, 51, 51, 0.15);
    --shadow-sm: 0 2px 8px rgba(255, 51, 51, 0.1);
    --glass-border: 1px solid rgba(255, 51, 51, 0.1);
    --glass-bg: linear-gradient(135deg, rgba(255, 51, 51, 0.05), rgba(255, 51, 51, 0.02));
    --nav-height: 64px;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  
  html, body { 
    height: 100%; 
    width: 100%; 
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    scroll-behavior: smooth;
    background: var(--background);
    color: var(--foreground);
    line-height: 1.6;
  }

  body {
    margin: 0;
    padding: 0;
    background: var(--background);
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: 
      radial-gradient(circle at 0% 0%, rgba(255, 255, 255, 0.08), transparent 70%),
      radial-gradient(circle at 100% 100%, rgba(255, 255, 255, 0.08), transparent 70%);
    pointer-events: none;
    z-index: 0;
  }

  .navbar {
    position: fixed;
    top: 0.75rem;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    z-index: 100;
  }
  
  .navbar-inner {
    width: calc(100% - 4rem);
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: rgba(10, 10, 12, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    height: 100%;
  }

  .logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
  }

  .logo-image {
    width: 38px;
    height: 38px;
    filter: brightness(0) saturate(100%) invert(36%) sepia(95%) saturate(3217%) hue-rotate(339deg) brightness(101%) contrast(100%);
    transition: filter var(--trans);
  }

  .logo:hover .logo-image {
    filter: brightness(0) saturate(100%) invert(45%) sepia(82%) saturate(2869%) hue-rotate(334deg) brightness(101%) contrast(101%);
  }

  .nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
  }

  .nav-link {
    color: var(--muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--trans);
    position: relative;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--trans);
  }

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

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

  .nav-link.active {
    color: var(--primary);
  }

  .nav-btn {
    background: linear-gradient(to right, var(--primary), var(--accent));
    color: rgba(255, 255, 255, 0.95);
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform var(--trans), box-shadow var(--trans);
    box-shadow: 0 4px 12px rgba(255, 50, 50, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.5rem;
    text-decoration: none;
  }

  .content {
    max-width: 900px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
    position: relative;
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
  }

  h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 80px;
    height: 3px;
    background: var(--primary);
    border-radius: var(--radius-full);
  }

  h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1.25rem;
    color: var(--primary);
  }

  p {
    margin-bottom: 1.25rem;
    color: var(--muted);
    line-height: 1.8;
  }

  ul {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
  }

  ul li {
    margin-bottom: 0.75rem;
    color: var(--muted);
  }

  .card {
    background: var(--card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .footer {
    position: relative;
    width: 100%;
    padding: 6rem 0 2rem;
    background: rgba(20, 20, 25, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
  }

  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 4rem;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--foreground);
  }

  .footer-tagline {
    color: var(--muted);
    font-size: 0.9375rem;
    line-height: 1.6;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .footer-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .footer-group h4 {
    color: var(--foreground);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
  }

  .footer-group a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--trans);
  }

  .footer-group a:hover {
    color: var(--primary);
  }

  .footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
  }

  .footer-copyright {
    color: var(--muted);
    font-size: 0.875rem;
  }

  .mobile-nav {
    display: none;
    align-items: center;
    gap: 0.75rem;
  }

  .mobile-nav-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all var(--trans);
    position: relative;
    overflow: hidden;
  }

  .mobile-nav-icon svg {
    width: 20px;
    height: 20px;
    transition: transform var(--trans);
  }

  @media (max-width: 768px) {
    .nav-links {
      display: none;
    }

    .mobile-nav {
      display: flex;
    }

    .navbar {
      padding: 0 1rem;
    }

    .navbar-inner {
      padding: 0 1rem;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 3rem;
    }

    .footer-links {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 480px) {
    h1 {
      font-size: 2rem;
    }

    .footer-links {
      grid-template-columns: 1fr;
    }
  }