.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:rgba(10,10,26,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border-subtle);z-index:1000;transition:background var(--transition)}.nav.scrolled{background:rgba(10,10,26,.95);border-bottom-color:var(--color-border)}.nav-inner{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-6);height:100%;display:flex;align-items:center;justify-content:space-between}.nav-logo{display:flex;align-items:center;gap:var(--space-3);text-decoration:none;color:var(--color-text-heading);font-weight:700;font-size:var(--text-lg)}.nav-logo:hover{text-decoration:none;color:var(--color-text-heading)}.nav-logo img,.nav-logo svg{width:32px;height:32px}.nav-links{display:flex;align-items:center;gap:var(--space-8);list-style:none}.nav-links a{color:var(--color-text-secondary);font-size:var(--text-sm);font-weight:500;text-decoration:none;transition:color var(--transition-fast);position:relative}.nav-links a.active,.nav-links a:hover{color:var(--color-text-heading);text-decoration:none}.nav-links a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--color-primary);border-radius:1px}.nav-github{display:flex;align-items:center;gap:var(--space-2)}.nav-github svg{width:20px;height:20px;fill:currentColor}.nav-toggle{display:none;background:0 0;border:none;cursor:pointer;padding:var(--space-2);color:var(--color-text)}.nav-toggle span{display:block;width:22px;height:2px;background:currentColor;margin:5px 0;transition:transform var(--transition),opacity var(--transition);border-radius:1px}.nav-toggle.active span:first-child{transform:translateY(7px) rotate(45deg)}.nav-toggle.active span:nth-child(2){opacity:0}.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-6)}.container-narrow{max-width:var(--max-width-narrow);margin:0 auto;padding:0 var(--space-6)}.main{padding-top:var(--nav-height)}.section{padding:var(--space-24) 0}.section-sm{padding:var(--space-16) 0}.section-header{text-align:center;max-width:700px;margin:0 auto var(--space-16)}.section-header h2{margin-bottom:var(--space-4)}.section-header p{font-size:var(--text-lg);color:var(--color-text-secondary)}.grid{display:grid;gap:var(--space-6)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.footer{border-top:1px solid var(--color-border-subtle);padding:var(--space-16) 0 var(--space-8);background:var(--color-bg-secondary)}.footer-inner{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-6)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-12);margin-bottom:var(--space-12)}.footer-brand{display:flex;flex-direction:column;gap:var(--space-4)}.footer-brand p{font-size:var(--text-sm);color:var(--color-text-muted);max-width:280px}.footer-col h4{font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);margin-bottom:var(--space-4);font-weight:600}.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:var(--space-3)}.footer-col a{color:var(--color-text-secondary);font-size:var(--text-sm);transition:color var(--transition-fast)}.footer-col a:hover{color:var(--color-text-heading);text-decoration:none}.footer-bottom{border-top:1px solid var(--color-border-subtle);padding-top:var(--space-6);display:flex;justify-content:space-between;align-items:center}.footer-bottom p{font-size:var(--text-sm);color:var(--color-text-muted);margin:0}.footer-bottom-links{display:flex;gap:var(--space-6)}.footer-bottom-links a{font-size:var(--text-sm);color:var(--color-text-muted)}.footer-bottom-links a:hover{color:var(--color-text-secondary)}