.header{position:fixed;top:0;left:0;right:0;z-index:var(--z-header);background:var(--header-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:background .3s}.header-spacer{height:60px;flex-shrink:0}.header-inner{margin:0 auto;padding:0 1rem;height:60px;display:flex;align-items:center;justify-content:space-between;gap:1rem}.header-logo{font-size:1.05rem;font-weight:700;color:var(--text);letter-spacing:-.01em;white-space:nowrap;flex-shrink:0}.header-logo span{color:var(--accent)}.desktop-nav{display:none}.desktop-nav a{font-size:.9rem;font-weight:500;color:var(--text-secondary);padding:.45rem .9rem;border-radius:8px;transition:color .2s,background .2s}.desktop-nav a:hover{color:var(--text);background:var(--bg-alt)}.desktop-nav a.active{color:var(--accent);background:var(--accent-dim)}.menu-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;background:none;border:none;cursor:pointer;gap:5px;position:relative;z-index:calc(var(--z-menu) + 10);flex-shrink:0;touch-action:manipulation}.menu-toggle .line{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transform-origin:center;transition:transform .35s cubic-bezier(.4,0,.2,1),opacity .25s ease,width .3s ease}.menu-toggle.is-open .line:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.is-open .line:nth-child(2){opacity:0;width:0}.menu-toggle.is-open .line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}