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spin{to{transform:rotate(360deg)}}.back-to-top{position:fixed;bottom:var(--space-8);right:var(--space-8);width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);color:var(--color-text-inverted);border:none;border-radius:var(--radius-full);font-size:var(--text-xl);cursor:pointer;box-shadow:var(--shadow-lg);z-index:var(--z-sticky);transition:all var(--duration-normal) var(--ease-default);animation:fadeInUp var(--duration-slow) var(--ease-out)}.back-to-top:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl),var(--shadow-glow)}.back-to-top:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:2px}@media(max-width:767px){.back-to-top{bottom:var(--space-4);right:var(--space-4);width:44px;height:44px;font-size:var(--text-lg)}}.navbar{--nav-fg: var(--color-heading);--nav-fg-muted: var(--color-text-muted);--nav-border: var(--color-border);--nav-accent: var(--color-primary-500);--nav-accent-contrast: #ffffff;--nav-hover-bg: var(--color-bg-1);position:sticky;top:0;z-index:var(--z-sticky);display:flex;justify-content:space-between;align-items:center;gap:var(--space-6);padding:var(--space-3) var(--space-8);color:var(--nav-fg);background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm);transition:background var(--duration-normal) var(--ease-default),color var(--duration-normal) var(--ease-default),border-color var(--duration-normal) var(--ease-default),box-shadow var(--duration-normal) var(--ease-default),padding var(--duration-normal) var(--ease-default)}.navbar.over-hero{--nav-fg: #e7ecf3;--nav-fg-muted: rgba(231, 236, 243, .72);--nav-border: rgba(231, 236, 243, .22);--nav-accent: var(--color-ink-accent);--nav-accent-contrast: var(--color-ink);--nav-hover-bg: rgba(231, 236, 243, .08);background:linear-gradient(to 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var(--nav-accent);outline-offset:2px;border-radius:var(--radius-sm)}.menu-icon,.mobile-menu-backdrop{display:none}@media(max-width:1023px){.navbar{padding-left:var(--space-4);padding-right:var(--space-4)}.nav-links{gap:0}}@media(max-width:767px){.menu-icon{display:inline-flex}.logo-img{height:48px}.nav-links{position:fixed;inset:72px 0 0;display:none;flex-direction:column;align-items:stretch;gap:var(--space-1);padding:var(--space-6) var(--space-4);background:var(--color-surface);border-top:1px solid var(--color-border);overflow-y:auto;animation:navSlideDown var(--duration-normal) var(--ease-out)}.nav-links.open{display:flex}@keyframes navSlideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.nav-links li{width:100%}.nav-links a{display:block;padding:var(--space-4);font-size:var(--text-lg);font-weight:var(--font-weight-semibold);color:var(--color-heading);border-radius:var(--radius-md)}.nav-links a:hover,.nav-links a.active{background:var(--color-bg-1);color:var(--color-heading)}.nav-links a.active:after{display:none}.navbar.menu-open{--nav-fg: var(--color-heading);--nav-fg-muted: var(--color-text-muted);--nav-border: var(--color-border);--nav-accent: var(--color-primary-500);--nav-accent-contrast: #ffffff;--nav-hover-bg: var(--color-bg-1);background:var(--color-surface);border-bottom-color:var(--color-border)}.mobile-menu-backdrop{display:block;position:fixed;inset:0;background:#00000059;z-index:-1}}@media(max-width:400px){.navbar{gap:var(--space-3);padding-left:var(--space-3);padding-right:var(--space-3)}.logo-img{height:42px}.actions{gap:var(--space-2)}}@media(prefers-reduced-motion:reduce){.nav-links{animation:none}}.footer{background:var(--color-ink);color:var(--color-ink-text);border-top:1px solid var(--color-ink-border);padding:var(--space-12) var(--space-8);display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--space-8);align-items:start}.footer-section{font-size:var(--text-base)}.footer-section h2.brand{font-size:var(--text-2xl);margin:0 0 var(--space-3) 0;font-weight:var(--font-weight-bold);color:var(--color-ink-heading)}.footer-section .tagline{font-size:var(--text-sm);color:var(--color-ink-text-muted);line-height:var(--line-height-relaxed);margin:0}.footer-section h3{font-size:var(--text-xs);margin-bottom:var(--space-4);color:var(--color-ink-text-muted);font-weight:var(--font-weight-medium);font-family:var(--font-mono);letter-spacing:var(--letter-spacing-mono);text-transform:uppercase}.footer-section p{margin:var(--space-2) 0;display:flex;align-items:center;gap:var(--space-3);line-height:var(--line-height-normal);color:var(--color-ink-text-muted);font-size:var(--text-sm)}.footer-section p span[aria-hidden=true]{flex-shrink:0}.footer-section a{color:var(--color-ink-text);text-decoration:none;transition:color var(--duration-fast) var(--ease-default)}.footer-section a:hover{color:var(--color-ink-accent);text-decoration:underline}.footer-bottom{grid-column:1 / -1;display:flex;justify-content:space-between;align-items:center;gap:var(--space-4);padding-top:var(--space-6);margin-top:var(--space-4);border-top:1px solid var(--color-ink-border);font-size:var(--text-sm);color:var(--color-ink-text-muted)}.footer-bottom .footer-link{color:var(--color-ink-text);font-weight:var(--font-weight-medium);text-decoration:none;transition:color var(--duration-fast) var(--ease-default)}.footer-bottom .footer-link:hover{color:var(--color-ink-accent);text-decoration:underline}@media(max-width:1023px){.footer{padding:var(--space-10) var(--space-6);gap:var(--space-6)}}@media(max-width:767px){.footer{grid-template-columns:1fr;padding:var(--space-8) var(--space-4);text-align:center}.footer-section{text-align:center}.footer-section p{justify-content:center}.footer-bottom{flex-direction:column;gap:var(--space-3);text-align:center}}