nav{position:fixed;top:0;left:0;right:0;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;background:color-mix(in srgb,var(--bg-secondary) 72%,transparent);backdrop-filter:blur(24px) saturate(1.4);-webkit-backdrop-filter:blur(24px) saturate(1.4);z-index:1000;border-bottom:1px solid color-mix(in srgb,var(--border-color) 50%,transparent);transition:background var(--transition),border-color var(--transition),box-shadow var(--transition)}nav.scrolled{box-shadow:0 4px 30px var(--shadow)}.logo{font-size:1.5rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.logo a,.logo .brand-text{color:inherit;text-decoration:none}.logo img{height:22px;filter:invert(1);margin-right:10px;vertical-align:middle}[data-theme=light] .logo img{filter:none}.theme-toggle{display:flex;align-items:center;gap:.5rem}.theme-toggle-btn{width:44px;height:24px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:12px;cursor:pointer;position:relative;transition:all var(--transition)}.theme-toggle-btn:after{content:"";position:absolute;width:18px;height:18px;background:var(--text-primary);border-radius:50%;top:2px;left:2px;transition:transform .35s var(--spring)}[data-theme=light] .theme-toggle-btn:after{transform:translate(20px)}.theme-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.mobile-menu-btn{display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-primary);width:44px;height:44px;cursor:pointer;z-index:1001}#menuIcon line{transition:transform .3s cubic-bezier(.34,1.56,.64,1),opacity .3s ease}#menuIcon .top-line{transform-origin:12px 6px}#menuIcon .middle-line{transform-origin:12px 12px}#menuIcon .bottom-line{transform-origin:12px 18px}.mobile-menu-btn.is-open .top-line{transform:translateY(6px) rotate(45deg)}.mobile-menu-btn.is-open .middle-line{opacity:0}.mobile-menu-btn.is-open .bottom-line{transform:translateY(-6px) rotate(-45deg)}.mobile-menu-overlay{display:flex;flex-direction:column;position:fixed;top:0;left:0;width:100%;height:100vh;background:color-mix(in srgb,var(--bg-secondary) 80%,transparent);backdrop-filter:blur(32px) saturate(1.8);-webkit-backdrop-filter:blur(32px) saturate(1.8);z-index:1000;padding:6rem 2rem 2rem;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .4s cubic-bezier(.34,1.56,.64,1)}.mobile-menu-overlay.is-open{opacity:1;visibility:visible;transform:translateY(0)}.mobile-nav-links{display:flex;flex-direction:column;gap:1.5rem;font-size:1.6rem;font-weight:600}.mobile-nav-links a{color:var(--text-secondary);text-decoration:none;transition:color .3s,transform .2s;padding:.5rem 0}.mobile-nav-links a:hover{color:var(--text-primary);transform:translate(5px)}.mobile-theme-wrapper{margin-top:auto;padding-top:2rem;border-top:1px solid var(--border-color)}main,footer{transition:filter .4s ease}body.mobile-menu-open main,body.mobile-menu-open footer{filter:blur(10px) brightness(.8)}@media(max-width:768px){nav{padding:.8rem 1rem}}@media(max-width:480px){nav{padding:.8rem .5rem}}