.site-header{background-color:var(--header-bg);color:var(--header-text);border-bottom:1px solid rgb(255 255 255 / .1);position:sticky;top:0;z-index:100}.header-container{max-width:var(--container-a);margin:0 auto;padding:0 10px;height:80px;display:flex;align-items:center;justify-content:space-between}.main-navigation{flex-grow:1;margin:0 40px}.nav-menu{display:flex;justify-content:center;list-style:none}.nav-menu>.menu-item{position:relative;padding:30px 15px}.nav-menu a{color:var(--header-text);font-weight:500;font-size:.95rem}.nav-menu a:hover,.nav-menu .menu-item:hover>a{color:var(--brand-green)}.sub-menu{position:absolute;top:100%;left:0;background-color:var(--brand-black);min-width:220px;list-style:none;border-top:2px solid var(--brand-green);box-shadow:0 5px 15px rgb(0 0 0 / .3);opacity:0;visibility:hidden;transform:translateY(10px);transition:all 0.3s ease}.nav-menu .menu-item:hover>.sub-menu{opacity:1;visibility:visible;transform:translateY(0)}.sub-menu .menu-item{position:relative;border-bottom:1px solid #222}.sub-menu a{display:block;padding:12px 20px;font-size:.9rem}.menu-item.has-children>a{display:flex;align-items:center;gap:6px}.menu-item.has-children>a::after{content:"";width:4px;height:4px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;margin-left:6px;transform:rotate(45deg);transition:transform .25s ease;position:relative;top:-.5px}.menu-item.has-children:hover>a::after{content:"";width:10px;height:1px;border:0;background:currentColor;transform:none}.sub-menu .sub-menu.level-3{top:0;left:100%;border-top:none;border-left:2px solid var(--brand-green)}.header-actions{display:flex;align-items:center;gap:6px}.action-btn{background:none;border:none;color:currentColor;cursor:pointer;display:flex;align-items:center;justify-content:center;width:36px;height:36px}.action-btn:hover{color:var(--brand-green)}.theme-icon::before{content:"🌙";font-size:1rem}body.dark-mode .theme-icon::before{content:"☀️"}.desktop-only{display:inline-block}.menu-toggle{display:none}.mobile-cta-wrapper{display:none}@media (max-width:768px){.menu-toggle{display:block;background:none;border:none;cursor:pointer;padding:10px}.hamburger{display:block;width:24px;height:2px;background:var(--header-text);position:relative}.hamburger::before,.hamburger::after{content:'';position:absolute;width:24px;height:2px;background:var(--header-text);left:0}.hamburger::before{top:-6px}.hamburger::after{top:6px}.menu-toggle[aria-expanded="true"] .hamburger{background:#fff0}.menu-toggle[aria-expanded="true"] .hamburger::before{transform:rotate(45deg);top:0}.menu-toggle[aria-expanded="true"] .hamburger::after{transform:rotate(-45deg);top:0}.header-container{height:60px}.desktop-only{display:none}.site-branding{position:absolute;left:50%;transform:translateX(-50%)}.main-navigation{position:fixed;top:60px;left:-100%;width:80%;height:calc(100vh - 60px);background:var(--brand-black);margin:0;box-shadow:5px 0 15px rgb(0 0 0 / .5);transition:left 0.3s ease;padding:20px;overflow-y:auto}.main-navigation.active{left:0}.nav-menu{flex-direction:column;justify-content:flex-start}.nav-menu>.menu-item{padding:15px 0;border-bottom:1px solid #222}.sub-menu,.sub-menu.level-3{display:none;position:static;opacity:1;visibility:visible;transform:none;margin-top:10px;padding-left:15px;background:#1a1a1a;box-shadow:none}.menu-item.active>.sub-menu{display:block}.menu-item.active>a::after{content:"";width:10px;height:1px;border:0;background:currentColor;transform:none}}