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