/* === BASE STYLES === */:root {
      --color-brand-primary: #0a1628;
      --color-brand-secondary: #0d2040;
      --color-brand-accent: #00d4ff;
      --color-brand-accent-alt: #00ffcc;
      --color-brand-highlight: #0099cc;
      --color-neutral-900: #040d1a;
      --color-neutral-800: #0a1628;
      --color-neutral-700: #112036;
      --color-neutral-600: #1a3050;
      --color-neutral-400: #4a7090;
      --color-neutral-200: #b0cce0;
      --color-neutral-100: #e0f0fa;
      --color-neutral-50: #f0f8ff;
      --color-text-primary: #e8f4fd;
      --color-text-secondary: #a0c4d8;
      --color-text-muted: #6a90a8;
      --color-surface-card: rgba(13, 32, 64, 0.85);
      --color-surface-elevated: rgba(17, 42, 80, 0.9);
      --color-border: rgba(0, 212, 255, 0.2);
      --color-border-strong: rgba(0, 212, 255, 0.5);
      --color-glow: rgba(0, 212, 255, 0.3);
      --spacing-xs: 0.25rem;
      --spacing-sm: 0.5rem;
      --spacing-md: 1rem;
      --spacing-lg: 1.5rem;
      --spacing-xl: 2rem;
      --spacing-2xl: 3rem;
      --spacing-3xl: 4rem;
      --spacing-4xl: 6rem;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-xl: 32px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 212, 255, 0.1);
      --shadow-elevated: 0 16px 48px rgba(0, 0, 0, 0.6), 0 4px 16px rgba(0, 212, 255, 0.15);
      --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(0, 212, 255, 0.2);
      --shadow-glow-alt: 0 0 20px rgba(0, 255, 204, 0.4);
      --transition-fast: 0.2s ease;
      --transition-base: 0.3s ease;
      --transition-slow: 0.5s ease;
      --font-display: 'Georgia', 'Times New Roman', serif;
      --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
    }

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

    html, body {
      overflow-x: hidden;
      max-width: 100vw;
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--color-neutral-900);
      color: var(--color-text-primary);
      line-height: 1.7;
      font-size: 1rem;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-inline: auto;
      padding-inline: var(--spacing-lg);
    }

    /* Utility classes */
    .flex { display: flex; }
    .items-center { align-items: center; }
    .justify-between { justify-content: space-between; }
    .gap-2 { gap: 0.5rem; }
    .gap-4 { gap: 1rem; }
    .gap-6 { gap: 1.5rem; }
    .gap-8 { gap: 2rem; }
    .text-accent { color: var(--color-brand-accent); }
    .text-muted { color: var(--color-text-muted); }
    .bg-primary { background: var(--color-brand-primary); }
    .w-full { width: 100%; }
    .relative { position: relative; }
    .overflow-hidden { overflow: hidden; }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-family: var(--font-body);
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: all var(--transition-base);
      white-space: nowrap;
      border-radius: var(--radius-md);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--color-brand-accent) 0%, var(--color-brand-accent-alt) 100%);
      color: var(--color-neutral-900);
      padding: 0.75rem 1.75rem;
      font-size: 0.875rem;
      box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 212, 255, 0.6);
      color: var(--color-neutral-900);
    }

    .btn-primary:active { transform: translateY(0); }

    .btn-hero {
      background: linear-gradient(135deg, var(--color-brand-accent) 0%, var(--color-brand-accent-alt) 100%);
      color: var(--color-neutral-900);
      padding: 1rem 2.5rem;
      font-size: 1.1rem;
      border-radius: var(--radius-lg);
      box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
    }

    .btn-hero:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: var(--shadow-glow);
      color: var(--color-neutral-900);
    }

    .btn-outline {
      background: transparent;
      color: var(--color-brand-accent);
      border: 2px solid var(--color-brand-accent);
      padding: 0.875rem 2rem;
      font-size: 1rem;
      border-radius: var(--radius-lg);
    }

    .btn-outline:hover {
      background: rgba(0, 212, 255, 0.1);
      transform: translateY(-2px);
      box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
      color: var(--color-brand-accent);
    }

    /* Cards */
    .card {
      background: var(--color-surface-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: transform var(--transition-base), box-shadow var(--transition-base);
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-elevated);
    }

    /* Section headings */
    h1, h2, h3, h4 {
      font-family: var(--font-display);
      line-height: 1.2;
    }

    h2 {
      font-size: clamp(1.75rem, 4vw, 2.5rem);
      color: var(--color-text-primary);
      margin-bottom: var(--spacing-xl);
      position: relative;
    }

    h2::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background: linear-gradient(90deg, var(--color-brand-accent), var(--color-brand-accent-alt));
      margin-top: var(--spacing-sm);
      border-radius: 2px;
    }

    h3 {
      font-size: clamp(1.2rem, 2.5vw, 1.6rem);
      color: var(--color-brand-accent);
      margin-bottom: var(--spacing-md);
    }

    p {
      color: var(--color-text-secondary);
      margin-bottom: var(--spacing-md);
    }

    p:last-child { margin-bottom: 0; }

    a {
      color: var(--color-brand-accent);
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    a:hover {
      color: var(--color-brand-accent-alt);
      text-decoration: underline;
    }

    /* Section spacing */
    section { padding-block: var(--spacing-4xl); }

    /* Feature list */
    .feature-list {
      list-style: none;
      padding: 0;
      margin: var(--spacing-md) 0;
    }

    .feature-list li {
      padding: 0.6rem 0 0.6rem 1.5rem;
      color: var(--color-text-secondary);
      border-bottom: 1px solid rgba(0, 212, 255, 0.08);
      position: relative;
    }

    .feature-list li::before {
      content: '▸';
      position: absolute;
      left: 0;
      color: var(--color-brand-accent);
      font-size: 0.8em;
      top: 50%;
      transform: translateY(-50%);
    }

    .feature-list li:last-child { border-bottom: none; }

    .feature-list li strong { color: var(--color-text-primary); }

    /* Definition list */
    .definition-list { margin: var(--spacing-md) 0; }

    .definition-list dt {
      color: var(--color-brand-accent);
      font-weight: 700;
      font-size: 0.9rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-top: var(--spacing-md);
    }

    .definition-list dd {
      color: var(--color-text-secondary);
      margin-left: 0;
      padding-left: var(--spacing-md);
      border-left: 2px solid var(--color-border-strong);
      margin-top: 0.25rem;
    }

    /* Tables */
    .table-responsive {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      background: rgba(10, 22, 40, 0.6);
    }

    .comparison-table thead tr {
      background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 255, 204, 0.1));
    }

    .comparison-table th {
      padding: 1rem 1.25rem;
      color: var(--color-brand-accent);
      font-weight: 700;
      text-align: left;
      font-size: 0.875rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .comparison-table td {
      padding: 0.875rem 1.25rem;
      color: var(--color-text-secondary);
      border-top: 1px solid var(--color-border);
      font-size: 0.95rem;
    }

    .comparison-table tbody tr:hover {
      background: rgba(0, 212, 255, 0.05);
    }

    /* Images */
    .content-image {
      margin: var(--spacing-lg) 0;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--color-border);
    }

    .content-image img {
      width: 100%;
      height: auto;
      display: block;
      max-height: 420px;
      object-fit: cover;
      transition: transform var(--transition-slow);
    }

    .content-image:hover img { transform: scale(1.02); }

    .content-image.portrait img { max-height: 480px; }

    figure { margin: 0; }
    figcaption { display: none; }

    /* Divider */
    .section-divider {
      width: 100%;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--color-brand-accent), transparent);
      opacity: 0.3;
    }

    /* Trust badge row */
    .trust-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(0, 212, 255, 0.1);
      border: 1px solid var(--color-border-strong);
      border-radius: 50px;
      padding: 0.35rem 1rem;
      font-size: 0.8rem;
      color: var(--color-brand-accent);
      font-weight: 600;
      letter-spacing: 0.03em;
    }

    .trust-badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--color-brand-accent-alt);
      display: inline-block;
      animation: pulse-dot 2s infinite;
    }

    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.8); }
    }

    /* Accordion */
    .accordion-item {
      background: var(--color-surface-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      margin-bottom: var(--spacing-sm);
      overflow: hidden;
      transition: border-color var(--transition-fast);
    }

    .accordion-item:hover { border-color: var(--color-border-strong); }

    .accordion-header {
      font-size: 1rem;
      color: var(--color-text-primary);
      padding: 1.25rem 1.5rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 0;
      font-family: var(--font-body);
      font-weight: 600;
      transition: color var(--transition-fast), background var(--transition-fast);
      list-style: none;
      user-select: none;
    }

    .accordion-header::-webkit-details-marker { display: none; }

    .accordion-item[open] .accordion-header {
      color: var(--color-brand-accent);
      background: rgba(0, 212, 255, 0.05);
    }

    .accordion-toggle-icon {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      border: 1.5px solid var(--color-brand-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      color: var(--color-brand-accent);
      flex-shrink: 0;
      transition: transform var(--transition-base);
    }

    .accordion-item[open] .accordion-toggle-icon { transform: rotate(45deg); }

    .accordion-body {
      padding: 0 1.5rem 1.25rem;
    }

    .accordion-body p { color: var(--color-text-secondary); }

    /* Animations */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    @keyframes shimmer {
      0% { background-position: -200% center; }
      100% { background-position: 200% center; }
    }

    @keyframes floatY {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
    }

    @keyframes glow-pulse {
      0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); }
      50% { box-shadow: 0 0 40px rgba(0, 212, 255, 0.6), 0 0 60px rgba(0, 255, 204, 0.2); }
    }

    @keyframes borderGlow {
      0%, 100% { border-color: rgba(0, 212, 255, 0.2); }
      50% { border-color: rgba(0, 212, 255, 0.6); }
    }

    .animate-fade-up { animation: fadeInUp 0.6s ease forwards; }
    .animate-fade { animation: fadeIn 0.8s ease forwards; }

    /* === LAYOUT STYLES === */

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(4, 13, 26, 0.95);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }

    .site-header .container {
      max-width: 1240px;
    }

    .header-inner {
      display: flex;
      align-items: center;
      gap: var(--spacing-lg);
      padding-block: 0.875rem;
    }

    .logo {
      flex-shrink: 0;
    }

    /* Hamburger */
    .hamburger {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      width: 44px;
      height: 44px;
      background: rgba(0, 212, 255, 0.1);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      cursor: pointer;
      padding: 0;
      flex-shrink: 0;
      transition: background var(--transition-fast);
      margin-left: auto;
    }

    .hamburger:hover { background: rgba(0, 212, 255, 0.2); }

    .hamburger span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--color-brand-accent);
      border-radius: 2px;
      transition: all var(--transition-base);
    }

    .hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; transform: scaleX(0); }
    .hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* Main nav */
    .main-nav { margin-left: auto; }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 0.25rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-list a {
      display: block;
      padding: 0.5rem 1rem;
      color: var(--color-text-secondary);
      font-size: 0.9rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: color var(--transition-fast), background var(--transition-fast);
      letter-spacing: 0.03em;
    }

    .nav-list a:hover {
      color: var(--color-brand-accent);
      background: rgba(0, 212, 255, 0.08);
      text-decoration: none;
    }

    .header-cta { flex-shrink: 0; }

    .cta-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-body);
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      text-decoration: none;
      border: none;
      cursor: pointer;
      border-radius: var(--radius-md);
      transition: all var(--transition-base);
      white-space: nowrap;
      background: linear-gradient(135deg, var(--color-brand-accent) 0%, var(--color-brand-accent-alt) 100%);
      color: var(--color-neutral-900) !important;
      padding: 0.65rem 1.5rem;
      font-size: 0.85rem;
      box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
    }

    .cta-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 212, 255, 0.6);
      text-decoration: none;
      color: var(--color-neutral-900) !important;
    }

    /* Footer */
    .site-footer {
      background: var(--color-neutral-900);
      border-top: 1px solid var(--color-border);
      padding-block: var(--spacing-2xl);
    }

    .footer-inner {
      display: flex;
      flex-direction: column;
      gap: var(--spacing-lg);
      align-items: center;
      text-align: center;
    }

    .footer-logo .logo-text {
      font-family: var(--font-display);
      font-size: 1.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--color-brand-accent), var(--color-brand-accent-alt));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .footer-nav-list {
      display: flex;
      flex-wrap: wrap;
      gap: var(--spacing-lg);
      list-style: none;
      margin: 0;
      padding: 0;
      justify-content: center;
    }

    .footer-nav-list a {
      color: var(--color-text-muted);
      font-size: 0.875rem;
      transition: color var(--transition-fast);
    }

    .footer-nav-list a:hover { color: var(--color-brand-accent); text-decoration: none; }

    .footer-disclaimer {
      color: var(--color-text-muted);
      font-size: 0.8rem;
      line-height: 1.6;
      max-width: 680px;
      margin: 0 auto;
    }

    /* Responsive Header */
    @media (max-width: 767px) {
      .hamburger { display: flex; }

      .header-inner {
        flex-wrap: wrap;
        padding-block: 0.75rem;
        gap: 0;
      }

      .logo { flex: 1; }

      .hamburger { margin-left: auto; }

      .main-nav {
        display: none;
        width: 100%;
        margin-left: 0;
        order: 3;
      }

      .main-nav.is-open { display: block; }

      .nav-list {
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-sm) 0 var(--spacing-md);
        gap: 0;
      }

      .nav-list a {
        padding: 0.75rem 0.5rem;
        font-size: 1rem;
        border-bottom: 1px solid var(--color-border);
      }

      .cta-button {
        display: block;
        width: 100%;
        max-width: 200px;
        margin-top: var(--spacing-sm);
        text-overflow: ellipsis;
        overflow: hidden;
        order: 4;
        flex: 0 0 100%;
      }

      .header-inner .cta-button {
        max-width: 100%;
        margin-top: var(--spacing-sm);
      }
    }

    @media (min-width: 768px) {
      .header-inner {
        flex-wrap: nowrap;
      }

      .main-nav { display: block !important; }
    }

@media (max-width: 767px) {
      .hamburger { display: flex; }

      .header-inner {
        flex-wrap: wrap;
        padding-block: 0.75rem;
        gap: 0;
      }

      .logo { flex: 1; }

      .hamburger { margin-left: auto; }

      .main-nav {
        display: none;
        width: 100%;
        margin-left: 0;
        order: 3;
      }

      .main-nav.is-open { display: block; }

      .nav-list {
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-sm) 0 var(--spacing-md);
        gap: 0;
      }

      .nav-list a {
        padding: 0.75rem 0.5rem;
        font-size: 1rem;
        border-bottom: 1px solid var(--color-border);
      }

      .cta-button {
        display: block;
        width: 100%;
        max-width: 200px;
        margin-top: var(--spacing-sm);
        text-overflow: ellipsis;
        overflow: hidden;
        order: 4;
        flex: 0 0 100%;
      }

      .header-inner .cta-button {
        max-width: 100%;
        margin-top: var(--spacing-sm);
      }
    }

@media (min-width: 768px) {
      .header-inner {
        flex-wrap: nowrap;
      }

      .main-nav { display: block !important; }
    }